Resettable PTCs 250R Datasheet

POLY-FUSE® Resettable PTCs
Radial Leaded > 250R Series
250R Series
*
RoHS
Description
he 250R Series is designed to protect against short
T
duration high voltage fault currents (power cross or power
induction surge) typically found in telecom applications
(250Vrms). The series can be used to help telecom
networking equipment meet the protection requirements
specified in ITU K.20 and K.21.
Features
• 0.08 – 0.18 hold current
range, 60VDC operating
voltage
• 250VAC interrupt rating
• Fast time–to-trip
Agency Approvals
AGENCY
AGENCY FILE NUMBER
• Binned and sorted narrow
resistance ranges available
• RoHS compliant, LeadFree and Halogen-Free*
Applications
E183209
• Customer Premises
Equipment (CPE)
• Central Office (CO)/
telecom centers
R50120008
• LAN/WAN equipment
• Access equipment
Electrical Characteristics
Part Number
I hold
(A)
I trip
(A)
Vint / Vop
I max
(A)
Pd
typ.
(W)
Vmax
Maximum Time
To Trip
Agency
Approvals
Resistance
Current
(A)
Time
(Sec.)
R min
(Ω)
R typ
(Ω)
R 1max
(Ω)
250R080
0.08
0.16
250/60
3
1
0.35
4.0
14
22
33
X
X
250R080T
0.08
0.16
250/60
3
1
0.35
4.0
15
22
33
X
X
250R120
0.12
0.24
250/60
3
1
1
2.5
4
8
16
X
X
250R120-RA
0.12
0.24
250/60
3
1
1
2.5
7
9
16
X
X
250R120-RC
0.12
0.24
250/60
3
1
1
3.0
5.4
7.5
14
X
X
250R120-RF
0.12
0.24
250/60
3
1
1
2.5
6
10.5
16
X
X
250R120-R1
0.12
0.24
250/60
3
1
1
2.5
6
9
16
X
X
250R120-R2
0.12
0.24
250/60
3
1
1
2.5
8
10.5
16
X
X
250R120-R3
0.12
0.24
250/60
3
1
1
2.5
8
10
16
X
X
250R120T
0.12
0.24
250/60
3
1
1
2.5
7
12
16
X
X
250R145
0.145
0.29
250/60
3
1
1
2.5
3
6
14
X
X
250R145-RA
0.145
0.29
250/60
3
1
1
2.5
3
5.5
12
X
X
250R145-RB
0.145
0.29
250/60
3
1
1
2.5
4.5
6
14
X
X
250R145T
0.145
0.29
250/60
3
1
1
2.5
5.4
7.5
14
X
X
250R180
0.18
0.65
250/60
10
1.8
1
20
0.8
2.2
4
X
X
250R180T
0.18
0.65
250/60
10
1.8
1
21
1.4
3.9
4.5
X
X
Items with T at end of part number = pre-tripped device. See Part Ordering Number System section of this data sheet for additional information.
I hold = Hold current: maximum current device will pass without tripping in 20°C still air.
R min = Minimum resistance of device in initial (un-soldered) state.
I trip = Trip current: minimum current at which the device will trip in 20°C still air.
R typ = Typical resistance of device in initial (un-soldered) state.
Vint = Maximum voltage the device can withstand without damage at rated current (I max)
R 1max = Maximum resistance of device at 20°C measured one hour after tripping.
Vop= The device regular operation voltage
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.
I max = Maximum fault current device can withstand without damage at rated voltage (Vmax)
P d = Power dissipated from device when in the tripped state at 20°C still air.
* Effective January 1, 2010, all 250R PTC products will be manufactured Halogen Free (HF). Existing Non-Halogen Free 250R PTC products may continue to be sold, until supplies are depleted.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/23/15
POLY-FUSE® Resettable PTCs
Radial Leaded > 250R Series
Temperature Rerating
Ambient Operation Temperature
-40°C
-20°C
0°C
20°C
40°C
Part Number
50°C
60°C
70°C
85°C
Hold Current (A)
250R080
0.12
0.11
0.09
0.08
0.06
0.05
0.05
0.04
0.03
250R080T
0.12
0.11
0.09
0.08
0.06
0.05
0.05
0.04
0.03
250R120
0.18
0.16
0.14
0.12
0.10
0.09
0.08
0.06
0.05
250R120T
0.18
0.16
0.14
0.12
0.10
0.09
0.08
0.06
0.05
250R145
0.26
0.20
0.17
0.145
0.12
0.11
0.09
0.08
0.06
250R145T
0.26
0.20
0.17
0.145
0.12
0.11
0.09
0.08
0.06
250R180
0.28
0.23
0.21
0.18
0.16
0.13
0.10
0.11
0.083
250R180T
0.28
0.23
0.21
0.18
0.16
0.13
0.10
0.11
0.083
Average Time Current Curves
Temperature Rerating Curve
170%
100000
Percentage of Rated Current
150%
10000
Resistance (ohm)
1000
100
130%
110%
90%
70%
50%
30%
10%
10
-40 -30 -20
1
0
10
20 30 40
Temperature (°C)
50
Note:
Typical Temperature rerating curve, refer to table for derating data
B
C
0.1
D
0.01
-10
0.11
A
10
100
Fault Current in Amperes
The average time current curves and Temperature Rerating curve performance is affected
by a number or variables, and these curves provided as guidance only. Customer must
verify the performance in their application.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/23/15
60
70
80
POLY-FUSE® Resettable PTCs
Radial Leaded > 250R Series
Agency Specification Selection Guide For Telecom and Networking Applications
Product
Lightning
Power Cross
250R120
250R145
ITU K.20/21/45 – 1.5kV 10/700μs
ITU K.20/21/45 – 4kV 10/700μs*
ITU K.20/21/45 – 1.5kV 10/700μs
ITU K.20/21/45 – 4kV 10/700μs*
Telcordia GR – 974 – 1.0kV 10/1000μs
ITU K.20/21/45 – 230Vac, 10Ω
ITU K.20/21/45 – 600Vac, 600Ω
ITU K.20/21/45 – 230Vac, 10Ω
ITU K.20/21/45 – 600Vac, 600Ω
Telcordia GR – 974- 283Vac, 10A
250R180
*Devices should be independently evaluated and tested for use in any specific application
Protection Application Guide
Region/Specification
Application
South America/Asia/Europe
ITU K.45
*Access network equipment
Remote terminal
Repeaters
WAN equipment
Cross –connect
South America/Asia/Europe
ITU K.21
Customer and IT equipment
Analog modems
ADSL, xDSL
Phone sets, PBX systems
Internet appliances
POS terminals
South America/Asia/Europe
ITU K.20
Central Office
POTS/ISDN linecards
T1/E1/J1 linecards
ADSL/VDSL splitters
CSU/DSU
North America Telcordia
GR-974
South America/Asia/Europe
ITU K.20
North America Telcordia
GR-1089
South America/Asia/Europe
ITU K.20 and K.21
*Primary protection modules
MDF modules
Network interface
Device Selection
250R180
250R180T
250R145
250R145T
250R120
250R120T
250R180
250R180T
250R145
250R145T
250R120
250R120T
250R180
250R180T
250R145
250R145T
250R120
250R120T
250R180
250R180T
250R145
250R145T
250R120
250R120T
*Intrabuilding communication systems
LAN, VOIP cards
Local loop handsets
250R180
250R180T
250R145
250R145T
250R120
250R120T
LAN Intrabuilding power cross
Protection
LAN equipment, IP phone
250R080
*Resistance binned parts are recommended
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/23/15
POLY-FUSE® Resettable PTCs
Radial Leaded > 250R Series
Soldering Parameters - Wave Soldering
Peak Temp/ Duration Time
> 220°C
Preheat 140°C ~ 180°C
Storage Condition
Wave Soldering
260°C < 5 Sec
2 Sec ~ 20 Sec
180 Sec ~ 210 Sec
0°C~35°C < 70%RH
• Recommended soldering methods: heat element oven or
N2 environment for lead-free.
Soldering
260
Cooling
220
Temperature (°C)
Condition
190
160
Preheating
• Devices are designed to be wave soldered to the bottom
side of the board.
• Devices can be cleaned using standard industry methods
and solvents.
0
180 to 210
2 to 5
20-30
Time(s)
• This profile can be used for lead-free device
Note: If soldering temperatures exceed the recommended
profile, devices may not meet the performance
requirements.
Physical Specifications
Environmental Specifications
Lead Material
Tin-plated Copper
Operating/Storage
Temperature
-40°C to +85°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208
Maximum Device Surface
Temperature in Tripped State
125°C
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V-0 requirements.
Passive Aging
65°C/85°C, 1000 hours
Device Labeling
Marked with 'LF', voltage, current rating,
and date code.
Humidity Aging
+85°C, 85% R.H,.1000 hours
Thermal Shock
MIL–STD–202, Method 107
+125°C to -55°C 10 times
Solvent Resistance
MIL–STD–202, Method 215
Moisture Sesitivity Level
Level 1, J–STD–020
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/23/15
F
E
E
POLY-FUSE Resettable PTCs
®
Radial Leaded > 250R Series
Dimensions
A
Part Marking System
Figure 2
Figure 1
C
A
C
250
Littelfuse
Trademark
B
Littelfuse
Voltage Rating
Trademark
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
080
XXXX
B
250
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
120
XXXX
D
D
F
E
F
E
Figure 1
Figure 2
A
Part Number
250R080
250R080T
250
080
Littelfuse
Trademark
XXXX
250R120
B
C
D
E
Physical Characteristics
Inches
mm
Inches
mm
Inches
mm
Inches
mm
Inches
mm
Max.
Max.
Max.
Max.
Max.
Max.
Min.
Min.
Typ.
Typ.
Inches
mm
1
0.23
5.8
0.39
9.9
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
1
0.23250
120
5.8
0.39
9.9
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
Figure
Littelfuse
Voltage Rating
Trademark
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
XXXX
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
Lead (dia)
Material
2
0.26
6.5
0.43
11
0.15
3.8
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R120-RA
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R120-RC
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R120-RF
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R120-R1
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R120-R2
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R120-R3
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R120T
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R145
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R145-RA
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R145-RB
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R145T
2
0.26
6.5
0.43
11
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R180
1
0.37
9.5
0.47
12
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
250R180T
1
0.37
9.5
0.47
12
0.18
4.6
0.19
4.7
0.20
5.1
0.026
0.65
Sn/Cu
WARNING
• Users shall independently assess the suitability of these devices for each of their applications
• Operation of these devices beyond the stated maximum ratings could result in damage to the devices and lead to electrical arcing and/or fire
• These devices are intended to protect against the effects of temporary over-current or over-temperature conditions and are not intended to perform as protective devices where such
conditions are expected to be repetitive or prolonged in duration
• Exposure to silicon-based oils, solvents, electrolytes, acids, and similar materials can adversely affect the performance of these PPTC devices
• These devices undergo thermal expansion under fault conditions, and thus shall be provided with adequate space and be protected against mechanical stresses
• Circuits with inductance may generate a voltage (L di/dt) above the rated voltage of the PPTC device.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/23/15
POLY-FUSE® Resettable PTCs
Radial Leaded > 250R Series
Part Ordering Number System
250 R 120
- RA Z R
PACKAGING STYLE
BLANK: Bulk
R: Tape & Ammo
QUANTITY CODE: F=200 M=1000 U=500 Z=1200
SERIES
Rx: Resistance Range (x = A-Z or 1-9) [not applicable for all parts]
T: PRE-TRIPPED DEVICE (OPTIONAL)
I HOLD CURRENT CODE (Refer to Packaging or Electrical Characteristics tables)
R: RADIAL
PEAK VOLTAGE RATING
Packaging
Part Number
250R080
250R080T
250R120
250R120-RA
250R120-RC
250R120-RF
250R120-R1
250R120-R2
250R120-R3
250R120T
250R145
250R145-RA
250R145-RB
250R145T
250R180
250R180T
Ordering
Number
250R080U
250R080ZR
250R080TU
250R080TZR
250R120U
250R120ZR
250R120-RAU
250R120-RAZR
250R120-RCU
250R120-RCZR
250R120-RFU
250R120-RFZR
250R120-R1U
250R120-R1ZR
250R120-R2U
250R120-R2ZR
250R120-R3U
250R120-R3ZR
250R120TU
250R120TZR
250R145U
250R145ZR
250R145-RAU
250R145-RAZR
250R145-RBU
250R145-RBZR
250R145TU
250R145TZR
250R180F
250R180MR
250R180TF
250R180TMR
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/23/15
I hold
(A)
I hold
Code
0.080
080
0.080
080
0.120
120
0.120
120
0.120
120
0.120
120
0.120
120
0.120
120
0.120
120
0.120
120
0.145
145
0.145
145
0.145
145
0.145
145
0.180
180
0.180
180
Packaging
Option
Quantity
Quantity &
Packaging Codes
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
1200
ZR
Bulk
500
U
Tape and Ammo
Bulk
1200
200
ZR
F
Tape and Ammo
1000
MR
Bulk
200
F
Tape and Ammo
1000
MR
POLY-FUSE® Resettable PTCs
Radial Leaded > 250R Series
Tape and Ammo Specifications
Devices taped using EIA468-B/IE286-2 standards. See table below and Figure 1 for details.
Dimension
EIA Mark
IEC Mark
Carrier tape width
W
Dimensions
Dim. (mm)
Tol. (mm)
W
18
–0.5 / +1.0
Hold down tape width
W4
W0
11
min.
Top distance between tape edges
W6
W2
3
max.
Sprocket hole position
W5
W1
9
–0.5 / +0.75
Sprocket hole diameter*
D0
D0
4
–0.32 / +0.2
Abscissa to plane (straight lead)
H
H
18.5
–/+ 3.0
Abscissa to plane (kinked lead)
H0
H0
16
–/+ 0.5
Abscissa to top
H1
H1
32.2
max.
Overall width without lead protrusion
C1
42.5
max.
Overall width with lead protrusion
C2
43.2
max.
Lead protrusion
L1
1.0
max.
max.
l1
Protrusion of cut out
L
L
11
Protrusion beyond hold–down tape
l2
l2
Not specified
Sprocket hole pitch: 250R080–250R145
P0
P0
12.7
–/+ 0.3
Sprocket hole pitch: 250R180
P0
P0
25.4
–/+ 0.5
20
consecutive.
–/+ 1
Pitch tolerance
Device pitch: 250R080–250R145
12.7
Device pitch: 250R180
25.4
Tape thickness
t
Tape thickness with splice
t1
t
Splice sprocket hole alignment
0.9
max.
2.0
max.
0
–/+ 0.3
Body lateral deviation
Δh
Δh
0
–/+ 1.0
Body tape plane deviation
Δp
Δp
0
–/+ 1.3
P1
P1
3.81
–/+ 0.7
F
F
5.1
–/+ 0.7
Ordinate to adjacent component lead*
Lead spacing
*Differs from EIA Specification
Tape and Ammo Diagram
∆h
∆h
Figure 1
∆h
∆p
Reference plane
A1
H1
F
A
L
B
H0
W4 W5
W
H1 C1
H C2
I2
L1
P0
D0
Direction of unreeling
Cross section A - B
t
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/23/15