BOURNS MF

Features
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Applications
Very small size 1210 footprint - 44 %
smaller design than MF-MSMD Series
Fast tripping resettable circuit protection
Surface mount packaging for automated
assembly
®
Agency recognition:
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®
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TÜV Rheinland
Product Safety
PC motherboards
PC modems
USB
Analog and digital line cards
IEEE 1394
General electronics: Phones, fax machines,
televisions, printers, video equipment
MF-USMD Series - PTC Resettable Fuses
Electrical Characteristics
Ihold
Model
V max.
Volts
I max.
Amps
MF-USMD005
MF-USMD010
MF-USMD020
MF-USMD035
MF-USMD050
MF-USMD075
MF-USMD110
30.0
30.0
30.0
6.0
13.2
6.0
6.0
10
10
10
40
40
40
40
Itrip
Amperes
at 23 °C
Hold
Trip
Ohms
at 23 °C
RMin.
R1Max.
0.05
0.10
0.20
0.35
0.50
0.75
1.10
2.80
0.80
0.40
0.20
0.18
0.07
0.05
0.15
0.30
0.40
0.75
1.00
1.50
2.20
Max. Time
To Trip
Resistance
50.0
15.0
5.00
1.30
0.90
0.450
0.210
Amperes
at 23 °C
Seconds
at 23 °C
0.25
0.5
8.0
8.0
8.0
8.0
5.0
1.5
0.6
0.02
0.2
0.1
0.1
1.0
Tripped
Power
Dissipation
Watts
at 23 °C
Typ.
0.8
0.8
0.8
1.0
1.0
1.2
1.2
Environmental Characteristics
Operating/Storage Temperature ........................-40 °C to +85 °C
Maximum Device Surface Temperature
in Tripped State ................................................125 °C
Passive Aging......................................................+85 °C, 1000 hours ....................................±5 % typical resistance change
Humidity Aging....................................................+85 °C, 85 % R.H. 1000 hours....................±10 % typical resistance change
Thermal Shock ....................................................+85 °C to -40 °C, 20 times ..........................±10 % typical resistance change
Solvent Resistance ............................................MIL-STD-202, Method 215 ........................No change
Vibration ..............................................................MIL-STD-883C, Method 2007.1, ................No change
Condition A
Test Procedures And Requirements For Model MF-USMD Series
Test
Test Conditions
Accept/Reject Criteria
Visual/Mech.....................................Verify dimensions and materials ....................................Per MF physical description
Resistance ......................................In still air @ 23 °C ............................................................Rmin ≤ R ≤ R1max
Time to Trip......................................At specified current, Vmax, 23 °C ..................................T ≤ max. time to trip (seconds)
Hold Current ....................................30 min. at Ihold ..............................................................No trip
Trip Cycle Life..................................Vmax, Imax, 100 cycles ..................................................No arcing or burning
Trip Endurance ................................Vmax, 48 hours ..............................................................No arcing or burning
Solderability ....................................MIL-STD-202F, Method 208F ........................................95 % min. coverage
UL File Number ..................................E174545
http://www.ul.com/ Follow link to Certifications, then UL File No., enter E174545
CSA File Number ................................CA110338
http://directories.csa-international.org/ Under “Certification Record” and “File Number” enter 110338-0-000
TÜV Certificate Number ......................R 02057213
http://www.tuvdotcom.com/ Follow link to “other certificates”, enter File No. 2057213
Thermal Derating Chart - Ihold (Amps)
Ambient Operating Temperature
Model
MF-USMD005
MF-USMD010
MF-USMD020
MF-USMD035
MF-USMD050
MF-USMD075
MF-USMD110
-40 ˚C
0.08
0.16
0.32
0.47
0.76
1.00
1.60
-20 ˚C
0.07
0.14
0.28
0.45
0.67
0.97
1.42
Specifications are subject to change without notice.
0 ˚C
0.06
0.12
0.24
0.40
0.58
0.86
1.26
23 ˚C
0.05
0.10
0.20
0.35
0.50
0.75
1.10
40 ˚C
0.04
0.08
0.16
0.33
0.43
0.64
0.94
50 ˚C
0.04
0.07
0.14
0.28
0.40
0.59
0.86
60 ˚C
0.03
0.06
0.12
0.24
0.36
0.54
0.80
70 ˚C
0.03
0.05
0.10
0.21
0.32
0.48
0.70
85˚C
0.02
0.04
0.06
0.18
0.28
0.40
0.58
Additional Features
■
Patents pending
MF-USMD Series - PTC Resettable Fuses
Product Dimensions
A
Model
Min.
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
MF-USMD005
MF-USMD010
MF-USMD020
MF-USMD035
MF-USMD050
MF-USMD075
MF-USMD110
B
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)
Min.
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
C
Max.
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
Min.
0.50
(0.020)
0.50
(0.020)
0.50
(0.020)
0.38
(0.015)
0.38
(0.015)
0.38
(0.015)
0.30
(0.012)
Max.
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.62
(0.025)
0.62
(0.024)
0.62
(0.025)
0.48
(0.019)
Packaging: 3000 pcs. per reel.
D
Min.
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
UNIT =
MM
(INCHES)
Typical Part Marking
Top and Bottom View
A
Side View
Recommended Pad Layout
C
1.1 ± 0.1
(.043 ± .004)
1.1 ± 0.1
(.043 ± .004)
Represents total content. Layout may vary.
YEAR CODE 2001 = 1
PART IDENTIFICATION
2.6 ± 0.1
(.102 ± .004)
B
1.70 ± 0.1
(.067 ± .004)
D
MANUFACTURER'S
TRADEMARK
051
Z
BIWEEKLY DATE CODE WEEK 51 & 52 = Z
Terminal material: solder-plated copper
Termination pad solderability: Meets EIA Specification RS-186-9E, ANSI/J-STD-002 Category 3.
Solder Reflow Recommendations
300
Preheating
Soldering
Cooling
10–20
120
Temperature (°C)
250
200
150
100
50
0
160–220
Time (seconds)
Note:
• MF-USMD models can be wave soldered and reworked.
• If reflow temperatures exceed the recommended profile, devices may not meet the performance
requirements.
Specifications are subject to change without notice.
MF-USMD Series - PTC Resettable Fuses
How to Order
MF - USMD 005 - 2
MF
-US
MD
110
MF
-US
MD
020
MF
-US
MD
035
MF
-US
MD
050
MF
-US
MD
075
MF
-US
MD
005
MF
-US
MD
010
Typical Time to Trip at 23 ˚C
Multifuse® Product
Designator
Series
USMD = 1210 Surface Mount Component
Hold Current, Ihold
005-110 (0.05 Amps - 1.10 Amps)
100
Packaging
Packaged per EIA 481-1
-2 = Tape and Reel
Time to trip (Seconds)
10
1
0.1
0.01
0.001
0.1
1
Fault Current (Amps)
MF-USMD SERIES, REV. M, 04/03
Specifications are subject to change without notice.
10
MF-MSMD, MF-USMD & MF-ESMD Series Tape and Reel Specs
MF-MSMD Series
per EIA-481-1
MF-USMD Series
per EIA 481-1
MF-ESMD Series
per EIA 481-2
W
12.0 ± 0.30
(0.472 ± 0.012)
8.0 ± 0.30
(0.315 ± 0.012)
24.0 ± 0.3
(0.945 ± 0.012)
P0
4.0 ± 0.10
(0.157 ± 0.004)
4.0 ± 0.10
(0.157 ± 0.004)
4.0 ± 0.1
(0.157 ± 0.004)
Tape Dimensions
P2
8.0 ± 0.10
(0.315 ± 0.004)
2.0 ± 0.05
(0.079 ± 0.002)
A0
3.66 ± 0.15
(0.144 ± 0.006)
B0
4.98 ± 0.10
(0.196 ± 0.004)
P1
4.0 ± 0.10
(0.157 ± 0.004)
2.0 ± 0.05
(0.079 ± 0.002)
MF-USMD005,010,020:
MF-USMD035,050,075,110:
2.76 ± 0.10
2.93 ± 0.15
(0.109 ± 0.004)
(0.115 ± 0.006)
MF-USMD005,010,020:
3.5 ± 0.1
(0.138 ± 0.004)
5.9
(0.232)
1.5 + 0.10/-0.00
(0.059 + 0.004/-0)
5.5 ± 0.05
(0.217 ± 0.002)
1.75 ± 0.10
(0.069 ± 0.004)
B1 max.
D0
F
E1
10.25
(0.404)
0.6
(0.024)
0.1
(0.004)
E2 min.
T max.
T1 max.
0.95 ± 0.10
(0.037 ± 0.004)
K0
Leader min.
Trailer min.
8.0 ± 0.1
(0.315 ± 0.004)
2.0 ± 0.1
(0.079 ± 0.004)
5.65 ± 0.1
(0.222 ± 0.004)
MF-USMD035,050,075,110:
3.56 ± 0.1
(0.140 ± 0.004)
11.86 ± 0.1
(0.467 ± 0.004)
20.1
(0.791)
1.5 + 0.1/-0.0
(0.059 + 0.004/-0)
11.5 ± 0.10
(0.453 ± 0.004)
1.75 ± 0.10
(0.069 ± 0.004)
4.35
(0.171)
1.50 + 0.1/-0.0
(0.059 + 0.004/-0)
3.5 ± 0.05
(0.138 ± 0.002)
1.75 ± 0.10
(0.069 ± 0.004)
6.25
(0.246)
0.6
(0.024)
22.25
(0.876)
0.6
(0.024)
0.1
(0.004)
0.1
(0.004)
MF-USMD005,010,020:
MF-USMD035,050,075,110:
0.75 ± 0.10
1.07 ± 0.10
(0.030 ± 0.004)
(0.042 ± 0.004)
0.85 ± 0.1
(0.033 ± 0.004)
390
(15.35)
160
(6.30)
390
(15.35)
160
(6.30)
390
(15.35)
160
(6.30)
185
(7.28)
50
(1.97)
185
(7.28)
50
(1.97)
8.4 + 1.5/-0.0
(0.331 + 0.059/-0)
14.4
(0.567)
360
(14.17)
60
(2.36)
Reel Dimensions
A max.
N min.
12.4 + 2.0/-0.0
(0.488 + 0.079/-0.0)
18.4
(0.724)
W1
W2 max.
UNIT =
P0
T
D0
24.4 + 2.0/ -0.0
(0.961 + 0.079/-0)
30.4
(1.20)
P2
MM
(INCHES)
E1
W2(MEASURED
AT HUB)
COVER
TAPE
F
E2 W
B1
A
N(HUB DIA.)
B0
K0
T1
P1
A0
W1(MEASURED
AT HUB)
Specifications are subject to change without notice.