Bourns Multifuse® Resettable Fuses

Bourns Multifuse
Resettable Fuses
®
- Polymer PTC & Ceramic PTC
Short Form Catalog
®
Bourns® Multifuse® Products
B
ourns® Multifuse® family of Polymer
Positive Temperature Coefficient (PPTC)
“resettable fuses” are used in a wide variety of
circuit protection applications.
See Also
Under fault conditions the device resistance
will rise exponentially and remain in a
“tripped” state, providing continuous circuit
protection until the fault is removed. Once the
fault is removed and the power cycled, the
device will return to its normal low resistance
state.
Features/Benefits
What’s New in this Edition
• Multifuse® automotive short form catalog
• Circuit protection selection guide for
dedicated Multifuse® telecom products
• Resettable overcurrent protection
• Heat element
• Agency approvals - UL, CSA, TÜV
• Standard footprints and packaging options
• Low resistance
• RoHS compliance standard
• Custom designs available
Applications
• MF-PSMF Series 0805 surface mount
products
• MF-RHT Series high temperature radial
through-hole products
• MF-SM013/250V telecom vertical surface
mount products
• Expanded MF-NSMF Series 1206 surface
mount products
• MF-RG Series automotive radial throughhole products
• MF-RX/72 Series 72V radial through-hole
products
• CMF Series ceramic products
• Computer
• Battery
• Automotive
• Telecommunications
• Industrial
• Consumer
2
Multifuse® Products – How They Work
Amorphous
Polymer
Crystalline
Polymer
Conducting
Carbon Chains
cold
Non-conducting
Carbon Chains
hot
Resettable fuses are manufactured in the form of a conductive plastic, which is comprised of a nonconductive crystalline polymer with highly conductive carbon black particles impregnated throughout
the crystal lattice. Because of the close proximity of the carbon black particles within the crystal lattice,
under normal conditions current is allowed to flow easily through the conductive plastic. However
under a fault condition, when there is an increase in current, the conductive plastic heats at the rate of
I2R. As the material continues to heat, it eventually reaches the phase transformation temperature, which
changes the crystal structure into an amorphous structure. Once the material has transformed into this
amorphous structure, the conductive particles become isolated and are unable to conduct current hence
the drastic change in material resistance. It is only when the current is removed that the material is
allowed to cool and return to its original crystal structure.
Multifuse® Products – How They Are Used
Log Resistance
Log Resistance
I=V/RMF
I=V/RL
I=V/RMF
I=V/RL
I RMF
I
VS
VS
+t°
RMF
+t°
RL
RL
Temperature Temperature
PTC ResponsePTC
Characteristic
Response Characteristic
It is the materials used in resettable fuses that allow
them to reset after a fault condition has been
removed. Resettable fuses exhibit a positive
temperature coefficient effect when heated. While
many materials exhibit a PTC effect when heated
(an increase in resistance in response to a positive
change in temperature), what makes the material
used in resettable fuses unique is the fact that the
increase in resistance changes exponentially rather
than in a linear manner.
Typical CircuitTypical
Application
Circuit Application
It is because of this transformation from a low
resistance state to a high resistance state that allows
the resettable fuse to protect loads. It is this
transition from the low resistance state to high
resistance state that is referred to as tripping. The
time it takes for a resettable fuse to trip is relatively
quick, depending on how high the fault current is
and it can be as quick as a fraction of a second.
Hence they are an excellent form of protection for
most applications where sensitive devices need
extra protection.
3
Radial Leaded Low Voltage Products
Style 1
Style 2
Style 3
A
A
Style 4
Style 5
A
A
A
B
B
B
■ Computers and Peripherals
■ General Electronics
■ Automotive
■ Consumer Appliances
■ Electronic Toys
C
C
C
MF-R Series
Radial
Leaded
Style 1
C
C
Style 2
C
Side View
End View
Top and Bottom View
MF-R005
0.05
60
40
7.3
22.0
MF-R010
0.10
60
40
2.50
7.50
MF-R017
0.17
60
40
2.00
8.00
MF-R020
0.20
60
40
1.50
4.40
MF-R025
0.25
60
40
1.00
3.00
MF-R030
0.30
60
40
0.76
2.10
MF-R040
0.40
60
40
0.52
1.29
MF-R050
0.50
60
40
0.41
1.17
MF-R065
0.65
60
40
0.27
0.72
MF-R075
0.75
60
40
0.18
0.60
MF-R090
0.90
60
40
0.14
0.47
MF-R090-0-9 0.90
30
40
0.07
0.22
MF-R110
1.10
30
40
0.10
0.27
MF-R135
1.35
30
40
0.065
0.17
MF-R160
1.60
30
40
0.055
0.15
MF-R185
1.85
30
40
0.040
0.11
MF-R250
2.50
30
40
0.025
0.07
MF-R250-0-10 2.50
30
40
0.025
0.07
MF-R300
3.00
30
40
0.020
0.08
MF-R400
4.00
30
40
0.010
0.05
MF-R500
5.00
30
40
0.010
0.05
MF-R600
6.00
30
40
0.005
0.04
MF-R700
7.00
30
40
0.005
0.03
MF-R800
8.00
30
40
0.005
0.03
MF-R900
9.00
30
40
0.005
0.02
MF-R1100
11.00
16
100
0.003
0.014
MF-RG Series
Radial Leaded 16 V
Model
Ihold
max.
Amperes VVolts
at 23 °C
MF-RX Series*
Radial Leaded
16-60 Volts
0.05-11 Amps Hold
Current
Style 3
A
Initial
A 1 Hour (R1)C
Post-Trip
Resistance
Dimensions
B
I
Resistance
hold
mm/(in)
B
Model
Amperes V max. I max.
Ohms at 23 °C A
at 23 °C Volts
Amps
Min.
Max. A Max.
B Max. C Nom.
Side View
8.0
(0.315)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.9
(0.311)
9.7
(0.382)
10.4
(0.409)
11.7
(0.461)
7.4
(0.291)
8.9
(0.350)
8.9
(0.350)
10.2
(0.402)
12.0
(0.472)
12.0
(0.472)
12.0
(0.472)
12.0
(0.472)
14.4
(0.567)
17.4
(0.685)
19.3
(0.760)
22.1
(0.870)
24.2
(0.953)
24.2
(0.953)
24.2
(0.953)
C
Model
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
Side View
4
MF- RG300
3.0
16
100
0.038
0.0975
MF- RG500
5.0
16
100
0.015
0.0340
Dimensions
mm/(in)
B Max.
7.1
11.0
(0.28) (0.43)
10.4 14.3
(0.41) (0.56)
I max.
Amps
1 Hour (R1)
Initial
Post-Trip
Resistance Resistance
Ohms at 23 °C
Min.
Max.
MF-RX110
1.10
60
40
0.15
0.38
MF-RX135
1.35
60
40
0.12
0.30
MF-RX160
1.60
60
40
0.09
0.22
1
MF-RX185
1.85
60
40
0.08
0.19
1
MF-RX250
2.50
60
40
0.05
0.13
1
MF-RX300
3.00
60
40
0.04
0.10
1
MF-RX375
3.75
60
40
0.03
0.08
Dimensions
mm/(in)
B Max.
C Nom.
13.0
(0.512)
14.5
(0.571)
16.3
(0.642)
17.8
(0.701)
21.3
(0.839)
24.9
(0.980)
28.4
(1.118)
18.0
(0.709)
19.6
(0.772)
21.3
(0.839)
22.9
(0.902)
26.4
(1.039)
30.0
(1.181)
33.5
(1.319)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
*Not recommended for new designs, suggest using new MF-RX/72 Series
1
MF-RX/72 Series
Radial Leaded
1
1
Model
1
Ihold
max.
Amperes VVolts
at 23 °C
I max.
Amps
1 Hour (R1)
Initial
Post-Trip
Resistance Resistance
Ohms at 23 °C
Min.
Max.
MF-RX020/72
0.20
72
40
1.50
4.40
1
MF-RX025/72
0.25
72
40
1.00
3.00
1
MF-RX030/72
0.30
72
40
0.76
2.10
MF-RX040/72
0.40
72
40
0.52
1.29
MF-RX050/72
0.50
72
40
0.41
1.17
MF-RX065/72
0.65
72
40
0.27
0.72
MF-RX075/72
0.75
72
40
0.18
0.60
MF-RX090/72
0.90
72
40
0.14
0.47
MF-RX110/72
1.10
72
40
0.15
0.38
MF-RX135/72
1.35
72
40
0.12
0.30
1
2
3
2
2
2
5
5
5
5
5
5
5
72 Volts
0.20 – 3.75 Amps Hold Current
3
1
Style
A Max.
1
MF-RX160/72
1.60
72
40
0.09
0.22
2
MF-RX185/72
1.85
72
40
0.08
0.19
2
MF-RX250/72
2.50
72
40
0.05
0.13
2
MF-RX300/72
3.00
72
40
0.04
0.10
2
MF-RX375/72
3.75
72
40
0.03
0.08
Dimensions
mm/(in)
Style
A Max.
B Max.
C Nom.
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.9
(0.311)
9.7
(0.382)
10.4
(0.409)
11.7
(0.461)
10.84
(0.427)
12.26
(0.483)
13.94
(0.549)
15.18
(0.598)
17.84
(0.702)
20.67
(0.814)
23.51
(0.926)
12.7
(0.500)
12.7
(0.500)
13.4
(0.528)
13.7
(0.539)
13.7
(0.539)
15.2
(0.598)
16.0
(0.630)
16.7
(0.657)
16.84
(0.662)
18.26
(0.718)
19.94
(0.785)
21.18
(0.833)
23.84
(0.938)
26.67
(1.050)
29.51
(1.161)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
MF-RHT Series
Radial Leaded High Temperature
Operating Temperature
-40 °C ~ +125 °C
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
Ihold
Resistance
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts
Amps
Min.
Max. A Max.
B Max. C Nom.
Style
MF-RHT070
0.7
16
40
0.3
0.8
C Max.
5.1 ±0.7
(0.201 ±0.028)
5.1 ±0.7
(0.201 ±0.028)
Ihold
max.
Amperes VVolts
at 23 °C
1
Operating Temperature
-40 °C ~ +85 °C
1 Hour (R1)
Initial
Post-Trip
Resistance Resistance
I max.
Amps
Ohms at 23 °C
Min.
Max.
A Max.
60 Volts
1.10 - 3.75 Amps Hold Current
Style B
Top and Bottom View
8.3
(0.327)
12.7
(0.500)
12.7
(0.500)
12.7
(0.500)
12.7
(0.500)
13.4
(0.528)
13.7
(0.539)
13.7
(0.539)
15.2
(0.598)
16.0
(0.630)
16.7
(0.657)
12.2
(0.480)
14.0
(0.551)
18.9
(0.744)
16.8
(0.661)
18.4
(0.724)
18.3
(0.720)
18.3
(0.720)
18.3
(0.720)
24.8
(0.976)
24.9
(0.980)
31.9
(1.256)
29.8
(1.173)
32.9
(1.295)
32.9
(1.295)
32.9
(1.295)
■ Bulk and Tape and Reel Packaging
■ Industry Standard Sizes
Applications
B
B
Features
2
2
4
MF-RHT200
2.0
16
100
0.045
0.110
MF-RHT450
4.5
16
100
0.022
0.054
MF-RHT650
6.5
16
100
0.011
0.026
MF-RHT750
7.5
16
100
0.0094
0.022
MF-RHT1300 13.0
16
100
0.0041
0.01
6.86
10.8
5.1
(0.27) (0.425) (0.201)
9.4
14.0
5.1
(0.37) (0.55) (0.201)
10.4
15.6
5.1
(0.41) (0.61) (0.201)
12.7
22.2
5.1
(0.5) (0.88) (0.201)
14.0
23.5
5.1
(0.55) (0.93) (0.201)
23.5
28.7
10.2
(0.925) (1.17) (0.402)
Style
3
1
2
2
2
2
Surface Mount Low Voltage Products
Style 1
Style 2
C
Style 3
A
A
B
C
■ Computers and Peripherals
■ General Electronics
■ Automotive
B
A
End View
MF-SM Series (2920 package)
Surface Mount (7555 mm)
Top and Bottom View
Side View
6-60 Volts
0.30-3.00 Amps Hold Current
1 Hour (R1)
Initial
Post-Trip Dimensions
Resistance
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C
at 23 °C Volts
Amps
Min.
Max. A Max. B Max.
C Nom.
MF-SM030
0.30
60
40
0.90
4.80
MF-SM050
0.50
60
40
0.35
1.40
MF-SM075
0.75
30
80
0.23
1.00
MF-SM075/60 0.75
60
10
0.23
1.00
MF-SM100
1.10
30
80
0.12
0.48
MF-SM100/33 1.10
33
40
0.12
0.41
MF-SM125
1.25
15
100
0.07
0.25
MF-SM260
2.60
6
100
0.025
0.075
MF-SM300
3.00
6
100
0.015
0.048
MF-SM Series (3425 package)
Surface Mount (8763 mm)
7.98
(0.314)
7.98
(0.314)
7.98
(0.314)
7.98
(0.314)
7.98
(0.314)
7.98
(0.314)
7.98
(0.314)
7.98
(0.314)
7.98
(0.314)
3.18
(0.125)
3.18
(0.125)
3.18
(0.125)
3.18
(0.125)
3.0
(0.118)
3.0
(0.118)
3.0
(0.118)
3.0
(0.118)
3.0
(0.118)
5.44
(0.214)
5.44
(0.214)
5.44
(0.214)
5.44
(0.214)
5.44
(0.214)
5.44
(0.214)
5.44
(0.214)
5.44
(0.214)
5.44
(0.214)
MF-NSMF Series (1206 package)
6 - 30 Volts
Surface Mount (3216 mm) 0.12 - 2.00 Amps Hold Current
Model
Style
1
1
1
1
1
1
1
MF-SM150
1.50
15
100
0.06
0.25
MF-SM150/33 1.50
33
40
0.06
0.23
MF-SM185/33 1.80
33
40
0.04
0.15
MF-SM200
2.00
15
100
0.045
0.125
MF-SM250
2.50
15
100
0.024
0.085
9.50
(0.374)
9.50
(0.374)
9.50
(0.374)
9.50
(0.374)
9.50
(0.374)
3.0
(0.118)
3.0
(0.118)
3.0
(0.118)
3.0
(0.118)
3.0
(0.118)
6.71
(0.264)
6.71
(0.264)
6.71
(0.264)
6.71
(0.264)
6.71
(0.264)
Ihold
max.
Amperes VVolts
at 23 °C
1 Hour (R1)
Initial
Post-Trip
Resistance Resistance
I max.
Amps
Ohms at 23 °C
Min.
Max.
MF-NSMF012
0.12
30
10
1.35
8.50
MF-NSMF020
0.20
24
10
0.60
2.60
MF-NSMF035
0.35
6
100
0.30
1.20
MF-NSMF050
0.50
13.2
100
0.15
0.70
MF-NSMF075
0.75
6
100
0.10
0.40
MF-NSMF110
1.10
6
100
0.06
0.20
MF-NSMF150
1.50
6
100
0.03
0.13
MF-NSMF200
2.00
6
100
0.02
0.085
Dimensions
mm/(in)
Style
A Max.
B Max.
C Max.
3.4
(0.134)
3.4
(0.134)
3.4
(0.134)
3.4
(0.134)
3.4
(0.134)
3.4
(0.134)
3.4
(0.134)
3.5
(0.138)
1.8
(0.071)
1.8
(0.071)
1.8
(0.071)
1.8
(0.071)
1.8
(0.071)
1.8
(0.071)
1.8
(0.071)
1.8
(0.071)
1.1
(0.043)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.7
(0.028)
0.7
(0.028)
0.7
(0.028)
1.6
(0.063)
2
2
2
2
2
2
2
2
1
1
MF-MSMF Series (1812 package)
6-60 Volts
Surface Mount (4532 mm)
0.10-2.60 Amps Hold Current
15-33 Volts
1.50-2.50 Amps Hold Current
1 Hour (R1)
Initial
Post-Trip Dimensions
Resistance
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C
at 23 °C Volts
Amps
Min.
Max. A Max. B Max.
C Nom.
■ Tape and Reel Packaging
■ Industry Standard Sizes
Applications
C
B
Side View
Features
1 Hour (R1)
Initial
Resistance Post-Trip
Dimensions
Ihold
Resistance
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C
at 23 °C Volts Amps
Min.
Max. A Max.
B Max.
C Max.
MF-MSMF010
0.10
60
40
0.70
15.0
MF-MSMF014
0.14
60
40
0.40
6.50
MF-MSMF020
0.20
30
80
0.40
6.00
MF-MSMF020/60 0.20
60
40
0.40
6.00
MF-MSMF030
0.30
30
10
0.30
3.00
MF-MSMF050
0.50
15
100
0.15
1.00
MF-MSMF075
0.75 13.2 100
0.11
0.45
MF-MSMF075/24 0.75
24
40
0.11
0.45
MF-MSMF110
1.10
6
100
0.04
0.21
MF-MSMF110/16 1.10
16
100
0.04
0.21
MF-MSMF125
1.25
6
100
0.035
0.14
MF-MSMF150
1.50
6
100
0.03
0.12
MF-MSMF150/12 1.50
12
100
0.03
0.12
MF-MSMF160
1.60
8
100
0.035
0.099
MF-MSMF200
2.00
8
40
0.020
0.08
MF-MSMF250/16 2.50
16
100
0.015
0.1
MF-MSMF260
2.60
6
100
0.015
0.08
Style
1
1
1
1
1
5
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
4.73
(0.186)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
3.41
(0.134)
1.10
(0.043)
1.10
(0.043)
1.10
(0.043)
1.10
(0.043)
1.10
(0.043)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
2.00
(0.078)
0.85
(0.033)
Style
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Surface Mount Low Voltage Products (Continued)
MF-PSMF Series (0805 package)
6 - 9 Volts
Surface Mount (2010 mm)
0.20 - 1.10 Amps Hold Current
MF-SMDF Series (2018 package)
10 - 60 Volts
Surface Mount (5050 mm)
0.30 - 2.00 Amps Hold Current
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts
Amps
Min.
Max. A Max.
B Max.
C Max.
MF-SMDF050 0.55
60
10
0.20
1
MF-SMDF150 1.50
15
40
0.05
0.17
MF-SMDF200 2.00
10
40
0.03
0.1
5.44
4.93
1.09
(0.214) (0.194) (0.043)
5.44
4.93
0.85
(0.214) (0.194) (0.033)
5.44
4.93
0.85
(0.214) (0.194) (0.033)
2
2
MF-SMHT Series
16 Volts
Surface Mount/High
1.36 - 1.60 Amps Hold Current
Temperature (Working temp: -40 ~ +125 °C)
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts
Amps
Min.
Max. A Max.
B Max.
C Max.
MF-SMHT136 1.36
16
100
0.085
0.330
MF-SMHT160 1.60
16
100
0.050
0.150
7.98
3.0
5.44
(0.314) (0.118) (0.214)
9.5
3.0
6.71
(0.374) (0.118) (0.264)
Style
1
1
MF-USMF Series (1210 package)
6 - 30 Volts
Surface Mount (3225 mm)
0.05 - 1.75 Amps Hold Current
1 Hour (R1)
Initial
Post-Trip
Resistance Resistance
Model
Ihold
Amperes
at 23 °C
V max.
Volts
I max.
Amps
MF-USMF005
0.05
30
10
2.80
50.0
MF-USMF010
0.10
30
10
0.80
15.0
MF-USMF020
0.20
30
10
0.40
5.00
MF-USMF035
0.35
6.0
40
0.20
1.30
MF-USMF050
0.50
13.2
40
0.18
0.90
MF-USMF075
0.75
6.0
40
0.07
0.45
MF-USMF110
1.10
6.0
40
0.05
0.21
MF-USMF150
1.50
6.0
40
0.03
0.11
MF-USMF175
1.75
6.0
40
0.02
0.09
Ohms at 23 °C
Min.
Max.
Dimensions
mm/(in)
Style
A Max.
B Max.
C Max.
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
2.8
(0.11)
2.8
(0.11)
2.8
(0.11)
2.8
(0.11)
2.8
(0.11)
2.8
(0.11)
2.8
(0.11)
2.8
(0.11)
2.8
(0.11)
1.1
(0.043)
1.1
(0.043)
1.1
(0.043)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
Ihold
Amperes
at 23 °C
V max.
Volts
I max.
Amps
MF-PSMF020X
0.20
9
40
0.65
3.5
MF-PSMF035X
0.35
6
40
0.25
1.2
MF-PSMF050X
0.50
6
40
0.15
0.9
MF-PSMF075X
0.75
6
40
0.09
0.35
MF-PSMF110X
1.10
6
40
0.06
0.21
Style
2
2
2
2
2
2
2
2
2
2
6
1 Hour (R1)
Initial
Post-Trip
Resistance Resistance
Model
Ohms at 23 °C
Min.
Max.
Dimensions
mm/(in)
Style
A Max.
B Max.
C Max.
2.3
(0.091)
2.3
(0.091)
2.3
(0.091)
2.3
(0.091)
2.3
(0.091)
1.5
(0.059)
1.5
(0.059)
1.5
(0.059)
1.5
(0.059)
1.5
(0.059)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
1.25
(0.049)
1.25
(0.049)
2
2
2
2
2
Strap Products
Standard Style
"S" Style
Features
SLIT
A
■ Axial/Radial Leaded
■ Weldable Nickel Terminal
■ Very Low Internal Resistance
"RU" Style
0.5
4.0
X
NOMINAL
(.020) (.157)
A
A
B
Applications
B
B
C
C
C
■ Rechargeable Battery Packs for
Cellular Phones & Laptop Computers
MF-SVS Series (Lowest Available Resistance)
10 Volts
Axial Leaded Strap
1.7-2.3 Amps Hold Current
MF-VS Narrow Body Series (Low Resistance Narrow) 12 Volts
Axial Leaded Strap
1.7-2.1 Amps Hold Current
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts
Amps
Min.
Max. A Max.
B Max.
C Max.
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
Ihold
Resistance
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts
Amps
Min.
Max. A Max.
B Max.
C Max.
MF-SVS170
1.7
10
100
0.018
0.064
MF-SVS170N 1.7
10
100
0.018
0.064
MF-SVS175
1.75
10
100
0.017
0.063
MF-SVS175N 1.75
10
100
0.017
0.063
MF-SVS175NL 1.75
10
100
0.017
0.063
MF-SVS210
2.1
10
100
0.010
0.040
MF-SVS210N 2.1
10
100
0.010
0.040
MF-SVS230
2.3
10
100
0.010
0.036
MF-SVS230N 2.3
10
100
0.010
0.036
18.0
(0.709)
24.0
(0.945)
18.0
(0.709)
24.0
(0.945)
28.0
(1.102)
23.1
(0.909)
32.0
(1.260)
23.1
(0.909)
32.0
(1.260)
5.5
(0.216)
3.9
(0.153)
5.5
(0.216)
3.9
(0.153)
3.9
(0.153)
5.5
(0.216)
3.9
(0.153)
5.5
(0.216)
3.9
(0.153)
0.9
(0.035)
0.9
(0.035)
0.9
(0.035)
0.9
(0.035)
0.9
(0.035)
0.9
(0.035)
0.9
(0.035)
0.9
(0.035)
0.9
(0.035)
Style
MF-VS170N
1.7
12
100
0.030
0.105
MF-VS175NL 1.75
12
100
0.029
0.102
MF-VS210N
2.1
12
100
0.018
0.060
Std.
Std.
Std.
MF-VS170
1.7
16
100
0.030
0.105
MF-VS170S
1.7
16
100
0.030
0.105
MF-VS210
2.1
16
100
0.018
0.060
MF-VS210L
2.1
16
100
0.018
0.060
MF-VS210S
2.1
16
100
0.018
0.060
18.0
(0.709)
18.0
(0.709)
23.1
(0.909)
26
(1.023)
23.1
(0.909)
5.5
(0.217)
5.5
(0.217)
5.5
(0.217)
5.5
(0.217)
5.5
(0.217)
0.9 Std.
(0.035)
0.9 Std.
(0.035)
0.9 Std.
(0.035)
Std.
Std.
MF-LR Series (Low Resistance)
Axial Leaded Strap
Std.
Std.
10-20 Volts
1.90-9.00 Amps Hold Current
Initial 1 Hour (R1)
Resistance Post-Trip
Dimensions
Ihold
Resistance
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C
at 23 °C Volts Amps
Min.
Max. A Max.
B Max.
C Max.
Std.
Std.
MF-LR190
1.90
15
100
0.039
0.102
MF-LR190S
1.90
15
100
0.039
0.102
MF-LR260
2.60
15
100
0.020
0.083
MF-LR260S
2.60
15
100
0.020
0.083
MF-LR380
3.80
15
100
0.013
0.037
MF-LR450
4.50
16
100
0.011
0.028
MF-LR550
5.50
10
100
0.009
0.022
MF-LR600
6.00
10
100
0.007
0.019
MF-LR730
7.30
10
100
0.006
0.015
MF-LR730/20 7.30
20
100
0.006
0.015
MF-LR900/20 9.00
20
100
0.006
0.014
MF-VS Series (Low Resistance & Low Temp.)
16 Volts
Axial Leaded Strap
1.7-2.4 Amps Hold Current
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts
Amps
Min.
Max. A Max.
B Max.
C Max.
24.0
3.9
(0.945) (0.154)
28.0
3.9
(1.102) (0.154)
32.0
3.9
(1.260) (0.154)
Style
Style
0.9 Std.
(0.035)
0.9
S
(0.035)
0.9 Std.
(0.035)
0.9 Std.
(0.035)
0.9
S
(0.035)
7
22.1
(0.870)
22.1
(0.870)
23.1
(0.909)
23.1
(0.909)
26.0
(1.024)
26.0
(1.024)
37.0
(1.457)
26.0
(1.024)
30
(1.18)
29.1
(1.146)
47.6
(1.874)
5.2
(0.205)
5.2
(0.205)
5.2
(0.205)
5.2
(0.205)
7.5
(0.295)
10.5
(0.414)
7.5
(0.295)
15.9
(0.626)
15
(0.590)
14.5
(0.571)
8.5
(0.335)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.3
(0.051)
Style
Std.
S
Std.
S
Std.
Std.
Std.
Std.
Std.
Std.
Std.
Strap Products (Continued)
MF-LS Series (Lower Trip Temperature)
15-24 Volts
Axial Leaded Strap
1.0-3.4 Amps Hold Current
MF-S Series (Standard)
Axial Leaded Strap
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
Ihold
Resistance
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts
Amps
Min.
Max. A Max.
B Max.
C Max.
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
I
Resistance
hold
mm/(in)
Model Amperes V max. I max.
Ohms at 23 °C at 23 °C
Volts
Amps
Min.
Max. A Max.
B Max.
C Max.
MF-LS100S
1.0
24
100
0.070
0.260
MF-LS180
1.8
24
100
0.040
0.120
MF-LS180L
1.8
24
100
0.040
0.120
MF-LS180S
1.8
24
100
0.040
0.120
MF-LS190
1.9
24
100
0.030
0.100
MF-LS190RU 1.9
15
100
0.030
0.100
MF-LS260
2.6
24
100
0.025
0.076
MF-LS300
3.0
24
100
0.015
0.055
MF-LS340
3.4
24
100
0.016
0.050
23.1
(0.909)
26.0
(1.024)
37.5
(1.48)
26.0
(1.024)
23.4
(0.921)
20.8
(0.819)
26.0
(1.024)
31.8
(1.252)
26.0
(1.024)
5.2
(0.205)
5.2
(0.205)
5.6
(0.22)
5.2
(0.205)
11.0
(0.433)
14.3
(0.563)
11.9
(0.469)
13.5
(0.531)
15.9
(0.626)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.0
(0.039)
1.1
(0.043)
0.76
(0.030)
1.0
(0.039)
1.1
(0.043)
1.0
(0.039)
Style
MF-S120
1.20
15
100
0.085
0.220
MF-S120S 1.20
15
100
0.085
0.220
MF-S150
1.50
15
100
0.050
0.113
MF-S175
1.75
15
100
0.050
0.120
MF-S175S 1.75
15
100
0.050
0.120
MF-S200
2.00
30
100
0.030
0.080
MF-S350
3.50
30
100
0.017
0.040
MF-S420
4.20
30
100
0.012
0.040
S
Std.
Std.
S
Std.
RU
Std.
Std.
Features
A
C
Applications
Model
Ihold
max.
Amperes VVolts
at 23 °C
■ Lithium cells
■ Battery cells
■ Powered toys
■ Motors
15 Volts
2.5 - 12.2 Amps Hold Current
I max.
Amps
1 Hour (R1)
Initial
Post-Trip
Resistance Resistance
Ohms at 23 °C
Min.
Max.
MF-D
2.5
15
10
0.015
0.032
MF-D
3.5
15
20
0.015
0.032
MF-D
5.5
15
40
0.014
0.30
MF-D
12.2
15
50
0.007
0.017
Dimensions
mm/(in)
Style
A Max.
B Max.
C Max.
14.4
(0.567)
16.4
(0.646)
16.08
(0.633)
2.4
(0.945)
6.3
(0.248)
10.0
(0.394)
9.0
(0.354)
0.36
(0.014)
0.36
(0.014)
0.36
(0.014)
0.36
(0.014)
–
5.2
(0.205)
5.2
(0.205)
11.0
(0.433)
5.2
(0.205)
5.2
(0.205)
11.0
(0.433)
13.5
(0.531)
13.6
(0.535)
1.0
(0.039)
1.0
(0.039)
1.1
(0.043)
1.0
(0.039)
1.0
(0.039)
1.1
(0.043)
1.1
(0.043)
1.1
(0.043)
■ Custom designs to meet appropriate applications
■ Compatible with current industry standards
■ Overcurrent and overtemperature protection
■ Standard and low-temperature material
■ Patents pending
Style 1
MF-D Series*
Disk Configuration
22.1
(0.870)
22.1
(0.870)
23.4
(0.921)
23.1
(0.909)
23.1
(0.909)
23.4
(0.921)
31.8
(1.252)
32.4
(1.276)
Std.
Disk & Chip Type PTC Products
B
15-30 Volts
1.20-4.20 Amps Hold Current
1
1
1
1
*For ordering information, contact your Bourns representative.
8
Style
Std.
S
Std.
Std.
S
Std.
Std.
Std.
Telecom Products
Style 1
Features
■ Designed to Withstand Lightning Surge
■ Designed to Withstand AC Power Cross
■ Available in Matched Resistance “Bins”
Style 3
Style 2
A
A
A
C
B
Applications
B
B
■ CPE and Central Office
■ Access Equipment
■ Hybrid-Fiber Coax
C
C
Style 4
Style 5
A
B
A
B
C
C
MF-R/90 Series
Radial Leaded
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts
Amps
Min.
Max. A Max.
B Max. C Nom.
MF-R055/90
0.55
90
10
0.45
2.0
MF-R055/90U 0.55
90
10
0.45
2.0
MF-R075/90
0.75
90
10
0.37
1.65
MF-RX/250 Series (Fast Trip, Small Package)
Radial Leaded
MF-R/600 Series
Radial Leaded
90 Volts
0.55-0.75 Amps Hold Current
10.9
(0.43)
10.3
(0.4)
11.9
(0.47)
16.7
(0.65)
16.7
(0.65)
15.5
(0.61)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C at 23 °C Volts Amps
Min.
Max. A Max.
B Max.
C Max.
Style
MF-R015/600
0.15
60
3.0
6.0
22.0
MF-R015/600-A 0.15
60
3.0
7.0
20.0
MF-R015/600-B 0.15
60
3.0
9.0
22.0
MF-R015/600-F 0.15
60
3.0
7.0
22.0
MF-R016/600
0.16
60
3.0
4.0
18.0
MF-R016/600-A 0.16
60
3.0
4.0
16.0
MF-R016/600-1 0.16
60
3.0
4.0
17.0
1
1
1
60 Volts
250 Vrms short duration interrupt
0.12-0.18 Amps Hold Current
1 Hour (R1)
Initial
Post-Trip
Resistance
Dimensions
I
Resistance
hold
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C
at 23 °C Volts Amps
Min.
Max. A Max.
B Max.
C Max.
MF-RX012/250
0.12
60
3.0
4.0
16.0
MF-RX012/250-A 0.12
60
3.0
7.0
16.0
MF-RX012/250-C 0.12
60
3.0
5.5
14.0
MF-RX012/250-F 0.12
60
3.0
6.0
16.0
MF-RX012/250-1 0.12
60
3.0
6.0
16.0
MF-RX012/250-2 0.12
60
3.0
8.0
16.0
MF-RX012/250-T 0.12
60
3.0
7.0
16.0
MF-RX012/250U 0.12
60
3.0
6.0
16.0
MF-RX014/250
0.145 60
3.0
3.0
14.0
MF-RX014/250-A 0.145 60
3.0
3.0
12.0
MF-RX014/250-B 0.145 60
3.0
4.5
14.0
MF-RX014/250-T 0.145 60
3.0
5.4
14.0
MF-RX014/250U 0.145 60
3.0
3.5
12.0
MF-RX018/250
0.18
60 10.0
0.8
4.0
MF-RX018/250U 0.18
60 10.0
0.8
4.0
6.5
(0.256)
6.5
(0.256)
6.5
(0.256)
6.5
(0.256)
6.5
(0.256)
6.5
(0.256)
6.5
(0.256)
6.0
(0.236)
6.5
(0.256)
6.5
(0.256)
6.5
(0.256)
6.5
(0.256)
6.0
(0.236)
11.0
(0.433)
10.4
(0.409)
11.0
(0.433)
11.0
(0.433)
11.0
(0.433)
11.0
(0.433)
11.0
(0.433)
11.0
(0.433)
11.0
(0.433)
10.0
(0.394)
11.0
(0.433)
11.0
(0.433)
11.0
(0.433)
11.0
(0.433)
10.0
(0.394)
13.6
(0.535)
12.6
(0.496)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
5.1
(0.201)
60 Volts
600 Vrms short duration interrupt
0.15-0.16 Amps Hold Current
Style
MF-SM013/250 Series
Surface Mount
2
2
13.5
(0.531)
13.5
(0.531)
13.5
(0.531)
13.5
(0.531)
16.0
(0.629)
16.0
(0.629)
16.0
(0.629)
12.6
(0.496)
12.6
(0.496)
12.6
(0.496)
12.6
(0.496)
12.6
(0.496)
12.6
(0.496)
12.6
(0.496)
6.0
(0.236)
6.0
(0.236)
6.0
(0.236)
6.0
(0.236)
6.0
(0.236)
6.0
(0.236)
6.0
(0.236)
2
MF-SM013/250-2
0.13
60
3.0
6.5
20.0
MF-SM013/250-A-2 0.13
60
3.0
6.5
20.0
MF-SM013/250-B-2 0.13
60
3.0
9.0
20.0
MF-SM013/250-C-2 0.13
60
3.0
7.0
20.0
2
2
2
3
2
MF-SM013/250V Series
Surface Mount
2
2
2
Model
3
2
MF-SM013/250V
3
9
250
2
2
2
2
2
2
3.0
9.4
(0.370)
9.4
(0.370)
9.4
(0.370)
9.4
(0.370)
3.7
(0.146)
3.7
(0.146)
3.7
(0.146)
3.7
(0.146)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
Style
4
4
4
4
60 Volts
250 Vrms short duration interrupt
0.13 Amps Hold Current
1 Hour (R1)
Initial
Post-Trip
Ihold
Resistance Resistance
max. I max.
Amperes VVolts
Amps
Ohms
at
23
°C
at 23 °C
Min.
Max.
0.13
2
60 Volts
250 Vrms short duration interrupt
0.13 Amps Hold Current
Initial 1 Hour (R1)
Resistance Post-Trip Dimensions
Ihold
Resistance
mm/(in)
Model
Amperes V max. I max.
Ohms at 23 °C
at 23 °C Volts Amps
Min.
Max. A Max. B Max. C Max.
2
Style
6.5
20.0
Dimensions
mm/(in)
Style
A Max.
B Max.
6.6
(0.260)
7.4
3.2
(0.291) (0.126)
C Max.
5
Ceramic PTC Products
Style 1
Style 2
A
Style 4
Style 3
A
B
Features
C
B
A
B
C
A
B
C
C
Applications
Style 6
Style 5
A
C
A
B
B
Model
CMF-RL10
CMF-RL10-10
Induction
Voltage
Withstand
VAC
650
650
Rated
Resistance
(RN)
Ohms
Tolerance
10
±20 %
10
±10 %
Hold
Trip
Current
Current
Amps at 25 °C Amps at 25 °C
0.14
0.14
0.3
0.3
CMF-RL25U
650
35
±20 %
0.060
0.15
650
35
±20 %
0.075
0.15
CMF-RL35-10
650
35
±10 %
0.075
0.15
CMF-RL35A
650
35
±10 %
0.075
0.15
CMF-RL35A-10
650
35
±10 %
0.075
0.15
CMF-RL50
650
50
±20 %
0.065
0.15
CMF-RL50-10
650
50
±10 %
0.065
0.15
CMF-RL50A
650
50
±20 %
0.05
0.10
CMF-RL50A-10
650
50
±10 %
0.05
0.10
CMF-RL55
650
55
±20 %
0.065
0.15
CMF-RL55-10
650
55
±10 %
0.065
0.15
CMF-RL55A
650
55
±20 %
0.05
0.10
CMF-RL55A-10
650
55
±10 %
0.05
0.10
Rated
Resistance
(RN)
Dimensions
mm/(in)
Model
Style
A Max.
B Max.
C Nom.
9.5
(0.374)
9.5
(0.374)
5.2
(0.205)
9.8
(0.386)
9.8
(0.386)
7.5
(0.295)
7.5
(0.295)
9.8
(0.386)
9.8
(0.386)
7.5
(0.295)
7.5
(0.295)
9.8
(0.386)
9.8
(0.386)
7.5
(0.295)
7.5
(0.295)
4.5
(0.177)
4.5
(0.177)
3.5
(0.138)
5.0
(0.197)
5.0
(0.197)
5.6
(0.220)
5.6
(0.220)
5.0
(0.197)
5.0
(0.197)
5.6
(0.220)
5.6
(0.220)
5.0
(0.197)
5.0
(0.197)
5.6
(0.220)
5.6
(0.220)
13.5
(0.531)
13.5
(0.531)
5.2
(0.205)
13.5
(0.531)
13.5
(0.531)
13.0
(0.512)
13.0
(0.512)
13.5
(0.531)
13.5
(0.531)
13.0
(0.512)
13.0
(0.512)
13.5
(0.531)
13.5
(0.531)
13.0
(0.512)
13.0
(0.512)
Hold
Trip
Current
Current
Amps at 25 °C Amps at 25 °C
Ohms
Tolerance
CMF-RLC50
650
50
±20 %
0.065
0.15
CMF-RLC50-10
650
50
±10 %
0.065
0.15
Dimensions
mm/(in)
A Max.
B Max.
Induction
Voltage
Withstand
VAC
Rated
Resistance
(RN)
Ohms
Tolerance
230 V Rated
±0.5 Ohms Resistance
Matching in Housing
Hold
Trip
Current
Current
Amps at 25 °C Amps at 25 °C
1
CMF-SD25
600
25
±20 %
0.13
0.26
1
CMF-SD25-10
600
25
±10 %
0.13
0.26
2
CMF-SD25A
600
25
±20 %
0.13
0.26
1
CMF-SD25A-10
600
25
±10 %
0.13
0.26
1
CMF-SD35
600
35
±20 %
0.10
0.20
1
CMF-SD35-10
600
35
±10 %
0.10
0.20
1
CMF-SD35A
600
35
±20 %
0.10
0.20
1
CMF-SD35A-10
600
35
±10 %
0.10
0.20
1
CMF-SD50
600
50
±20 %
0.09
0.19
1
CMF-SD50-10
600
50
±10 %
0.09
0.19
1
CMF-SD50A
600
50
±20 %
0.09
0.19
1
CMF-SD50A-10
600
50
±10 %
0.09
0.19
Dimensions
mm/(in)
Style
A Max.
B Max.
C Nom.
9.0
(0.354)
9.0
(0.354)
7.15
(0.281)
7.15
(0.281)
9.0
(0.354)
9.0
(0.354)
7.15
(0.281)
7.15
(0.281)
9.0
(0.354)
9.0
(0.354)
7.15
(0.281)
7.15
(0.281)
10.8
(0.425)
10.8
(0.425)
8.5
(0.335)
8.5
(0.335)
10.8
(0.425)
10.8
(0.425)
8.5
(0.335)
8.5
(0.335)
10.8
(0.425)
10.8
(0.425)
8.5
(0.335)
8.5
(0.335)
10.2
(0.402)
10.2
(0.402)
8.1
(0.319)
8.1
(0.319)
10.2
(0.402)
10.2
(0.402)
8.1
(0.319)
8.1
(0.319)
10.2
(0.402)
10.2
(0.402)
8.1
(0.319)
8.1
(0.319)
5
5
5
5
5
5
5
5
5
5
5
5
1
1
1
230 Volts
±0.5 Ohms Packaging
Resistance Matching
CMF-RD Series
Twin Pack/Through-hole
Model
Ceramic Housing
±0.5 Ohms Packaging
Resistance Matching
CMF-RLC Series
Through-hole/Ceramic Case
Induction
Voltage
Withstand
VAC
CMF-SD Series
Twin Pack/SMD
230 Volts
±0.5 Ohms Packaging Resistance Matching
CMF-RL35
Model
Used as secondary overcurrent protection
devices in:
■ Customer Premise Equipment (CPE)
■ Central Office Equipment (CO)
■ Access Equipment
C
CMF-RL Series
Radial Leaded
■ Ceramic PTCs for telecom overcurrent
protection
■ Wide range of form factors for most
applications
■ Aids telecom compliance with:
- ITU-T K.20/21/45
- Telcordia GR-1089-CORE
- UL 60950, 3rd Ed.
■ Narrow and matched resistance tolerances
Style
Induction
Voltage
Withstand
VAC
Rated
Resistance
(RN)
Ohms
Tolerance
Hold
Trip
Current
Current
Amps at 25 °C Amps at 25 °C
CMF-RD50
600
50
±20 %
0.09
0.19
CMF-RD50-10
600
50
±10 %
0.09
0.19
Dimensions
mm/(in)
A Max.
B Max.
Style
C Nom.
9.0
10.2
9.5
(0.354) (0.402) (0.446)
9.0
10.2
9.5
(0.354) (0.402) (0.446)
4
4
C Nom.
9.2
4.7
9.6
(0.362) (0.185) (0.378)
9.2
4.7
9.6
(0.362) (0.185) (0.378)
3
3
Four CPTCs in One Package
±0.5 Ohms Resistance
Matching in Housing
CMF-RQ Series
Quad Pack/Through-hole
Model
10
Induction
Voltage
Withstand
VAC
Rated
Resistance
(RN)
Ohms
Tolerance
Hold
Trip
Current
Current
Amps at 25 °C Amps at 25 °C
CMF-RQ50
600
50
±20 %
0.09
0.19
CMF-RQ50-10
600
50
±10 %
0.09
0.19
Dimensions
mm/(in)
A Max.
B Max.
Style
C Nom.
10.0
21.0
11.0
(0.393) (0.826) (0.433)
10.0
21.0
11.0
(0.393) (0.826) (0.433)
6
6
How To Order
MF -RX 012/250 U - A 05 - 2
Bourns® Multifuse® Product Designator
Series
D = Disk Configuration
LR = Axial Leaded Strap
LS = Axial Leaded Strap
MSMF = Surface Mount
NSMF = Surface Mount
PSMF = Surface Mount
R = Radial Leaded
RG = Radial Leaded
RHT = High Temp. Radial Mount
RX = Radial Leaded
S = Axial Leaded Strap
SM = Surface Mount
SMDF = Surface Mount
SMHT = High Temp. Surface Mount
SVS = Axial Leaded Strap
USMF = Surface Mount
VS = Axial Leaded Strap
VSN = Axial Leaded Strap
Current, Maximum (Imax)
The maximum fault current a PPTC device can
withstand without damage at the rated voltage.
Current, Trip (Itrip)
The minimum current that will switch a PPTC from the
low resistance to the high resistance state.
Fault Current
The peak current that flows through a PPTC or wire
during a short circuit or arc back.
Positive Temperature Coefficient (PTC)
A characteristic of the PPTC device that describes the
large increase in resistance as the device reaches its
switching (trip) temperature.
Voltage Options:
Max. Interrupt Voltage, V
Construction Options:
N =Narrow Device Option (3.6 mm)*
S =Slotted Lead Option (one side)*
SS =Slotted Lead Option (two sides)*
U =Uncoated
T =Pretripped **
Resistance Sorted**
(see individual data sheets)
Resistance Bins of 0.5 Ω***
05 =0.5 Ω
Agency Approvals
Bourns® PPTCs are certified under UL, CSA, IEC and
TÜV registration programs.
Current, Hold (Ihold)
The maximum current a PPTC device can pass without
interruption.
Hold Current, Ihold
Definitions
Resistance, Post Trip (R1max)
The maximum resistance one hour after a PPTC device
has been tripped and power has been removed.
Resistance, Post Reflow (R1max)
The maximum resistance one hour after a PPTC surface
mount device has been reflow soldered.
Voltage, Maximum (Vmax)
The maximum voltage a PPTC device can withstand
without damage at the rated current.
Packaging Options
- 0 =Bulk Packaging
- 2 =Tape and Reel
- AP =Ammo-Pak
Product Selection Worksheet
*Axial Leaded Strap products only.
**Telecom Radial Leaded products only.
***Radial Leaded products only.
1. What is the normal circuit operating current (Ihold)
2. What is the maximum circuit voltage (Vmax)
3. What is the maximum fault current (Imax)
4. What is the preferred form factor
Agency File Numbers
UL File Number................................................E 174545S
CSA File Number..............................................CA 110338
TÜV File Number.............................................R2057213
11
Note: Other factors including thermal derating and time to
trip characteristics may be important application
considerations. Please refer to the full Bourns® data sheet of
each product at www.bourns.com/multifuse.
Worldwide Sales Offices
Country
Benelux:
Brazil:
China:
France:
Germany:
Ireland/UK:
Italy:
Japan:
Malaysia (KL Office):
Malaysia (Penang Office):
Singapore:
Switzerland:
Taiwan:
UK/Ireland:
USA:
Phone
+41 (0)41 768 5555
+55 11 5505 0601
+86 21 64821250
+33 (0)2 5473 5151
+49 (0)69 800 78212
+44 (0)1276 691087
+41 (0)41 768 5555
+81 49 269 3204
+60 3 71183138
+60 4 6581771
+65 63487227
+41 (0)41 768 5555
+886 2 25624117
+44 (0)1276 691087
+1-951-781-5500
Fax
+41 (0)41 768 5510
+55 11 5505 4370
+86 21 64821249
+33 (0)2 5473 5156
+49 (0)69 800 78299
+44 (0)1276 691088
+41 (0)41 768 5510
+81 49 269 3297
+60 3 71183139
+60 4 6582771
+65 63481272
+41 (0)41 768 5510
+886 2 25624116
+44 (0)1276 691088
+1-951-781-5006
Non-Listed European
Countries:
+41 (0)41 768 5555
+41 (0)41 768 5510
Technical Assistance
Region
Asia-Pacific:
Europe:
Americas:
Phone
+886 2 25624117
+41 (0)41 768 5555
+1-951-781-5500
Fax
+886 2 25624116
+41 (0)41 768 5510
+1-951-781-5700
www.bourns.com
Bourns® products are available through an extensive global network of representatives and distributors.
To obtain technical applications assistance, a quotation, or to place an order, contact a Bourns representative in your area.
Specifications subject to change without notice. Actual performance in specific customer applications may differ due to the
influence of other variables. Customers should verify actual device performance in their specific applications.
Circuit Protection Solutions
“Bourns” and "Multifuse" are registered trademarks of Bourns, Inc. in the U.S. and other countries.
COPYRIGHT© 2008, BOURNS, INC. • LITHO IN U.S.A. • WAG • 03/08 • 10M/MF0714