57
©2009 Littelfuse, Inc.
Revised: November 30, 2009
POLYFUSE® Resettable PTCs
250S Series
Surface Mount > 250S Series
250S Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250S.html for current information.
The 250S High Voltage Radial device is a Polymer-based
PTC suitable to protect telephony equipment against
lightining and power cross strikes. The 250S Series is
fully compatible with telecommunications standards, and
is offered in horizontal and new vertical surface mount
package.
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
Electrical Characteristics
Part Number
Device
Mounting
Layout
I hold
(A)
I trip
(A)
V max
(Vint /Vop)
I max
(A)
P
d typ.
(W)
Time to Trip at 1A Resistance Agency
Approvals
Typical
(Sec.)
Maximum
(Sec.)
R min
(Ω)
R max
(Ω)
R 1max
(Ω)
250S130
Horizontal
0.13 0.26 250/60 3 1.2 0.9 4.0 4 13 20 –
250S130–RA 0.13 0.26 250/60 3 1.2 1.4 4.0 6.5 10 15 –
250S130–RB 0.13 0.26 250/60 3 1.2 0.7 4.0 9 13 20 –
250S130–RC 0.13 0.26 250/60 3 1.2 1.1 4.0 7 11 17 –
250S130V Vertical 0.13 0.26 250/60 3 1.2 2.0 4.0 4 13 20 –
I hold = Hold current: maximum current device will pass without tripping in 23°C still air.
I trip = Trip current: minimum current at which the device will trip in 23°C still air.
Vint = Maximum voltage the device can withstand without damage at rated current (I max)
Vop= The device regular operation voltage
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 23°C still air.
R min = Minimum resistance of device in initial (un-soldered) state.
R max = Maximum resistance of device in initial (un-soldered) state.
R 1max = Maximum resistance of device at 20°C measured one hour after tripping.
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.
Description
Features
Applications
• RoHS Compliant,
Directive 2002/95/EC
• Lead-Free & Halogen-Free
• Low resistance
• Compatible with telecom
standards
• Helps meets ITU K.20,
K.21/Telcordia standards
• Excellent solder joint
inspectability
• High voltage
250S Series
• Customer Premises
Equipment (CPE)
• Central Office (CO)/
telecom centers
• LAN/WAN equipment
• Access equipment
58
Revised: November 30, 2009
©2009 Littelfuse, Inc.
POLYFUSE® Resettable PTCs
Surface Mount > 250S Series
250S Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250S.html for current information.
Ambient Operation Temperature
-40°C -20°C 0°C 23°C 40°C 50°C 60°C 70°C 85°C
Part Number Hold Current (A)
250S130 0.21 0.19 0.17 0.13 0.11 0.10 0.09 0.07 0.05
Temperature Rerating
Temperature Rerating Curve
Average Time Current Curves
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.
200.00
160.00
120.00
80.00
40.00
0.00
-40.00 0.00 40.00 80.00 120.00
Device Ambient Temperature ºC
Percentage of rated current %
Protection Application Guide
Region/
Specification Application Device
Selection
South America/
Asia/Europe
ITU K.45
Access network equipment
Remote terminal
Repeaters
WAN equipment
Cross –connect
250S130
250S130V
250S130-RA
250S130-RB
250S130-RC
South America/
Asia/Europe
ITU K.21
Customer and IT equipment
Analog modems
ADSL, xDSL
Phone sets, PBX systems
Internet appliances
POS terminals
250S130
250S130V
250S130-RA
250S130-RB
250S130-RC
South America/
Asia/Europe
ITU K.20
Central Office
POTS/ISDN linecards
T1/E1/J1 linecards
ADSL/VDSL splitters
CSU/DSU
250S130
250S130V
250S130-RA
250S130-RB
250S130-RC
Agency Specification Selection Guide For Telecom
and Networking Applications
Product Lightning Power Cross
250S130
250S130V
250S130-RA
250S130-RB
250S130-RC
ITU K.20/21/45 –
1.5kV 10/700μs
ITU K.20/21/45 –
230Vac, 10Ω
250S
0.10
1
10
100
1000
0.1 1 10 100
Current in Amperes
Time in Seconds
0.13A
59
©2009 Littelfuse, Inc.
Revised: November 30, 2009
POLYFUSE® Resettable PTCs
250S Series
Surface Mount > 250S Series
250S Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250S.html for current information.
Soldering Parameters
Profile Feature Pb-Free Assembly
Average Ramp-Up Rate (TS(max) to TP) 3°C/second max
Pre Heat:
Temperature Min (Ts(min))150°C
Temperature Max (Ts(max))200°C
Time (Min to Max) (ts)60 – 180 secs
Time Maintained
Above:
Temperature (TL)217°C
Temperature (tL)60 – 150 seconds
Peak / Classification Temperature (TP) 260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (TP) 8 minutes Max.
-- All temperature refer to topside of the package, measured on the package body surface
-- If reflow temperature exceeds the recommended profile, devices may not meet the
performance requirements
-- Recommended reflow methods: IR, vapor phase oven, hot air oven, N2 environment
for lead
-- Recommended maximum paste thickness is 0.25mm (0.010 inch)
-- Devices can be cleaned using standard industry methods and solvents
-- Devices can be reworked using the standard industry practices
Environmental Specifications
Operating/Storage
Temperature -40°C to +85°C
Maximum Device Surface
Temperature in Tripped State 125°C -/+10ºC
Passive Aging +85°C, 1000 hours
Humidity Aging +85°C, 85%,R.H.,1000 hours
Thermal Shock MIL–STD–202F, Method 107G
+125°C to -55°C 10 times
Solvent Resistance MIL–STD–202, Method 215F
Moisture Sensitivity Level Level 1, J–STD–020C
Physical Specifications
Terminal Material Solder-Plated Copper (Solder Material:
Matte Tin(Sn))
Lead Solderability Meets EIA Specification RS186-9E, ANSI/
J-STD-002 Category 3.
60
Revised: November 30, 2009
©2009 Littelfuse, Inc.
POLYFUSE® Resettable PTCs
Surface Mount > 250S Series
250S Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250S.html for current information.
Dimensions
Part
Number
ABCDE
Material
FG H
Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm
Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max.
250S130 0.37 9.4 0.15 3.7 0.29 7.4 0.016 0.4 0.15 3.8 Sn/Ni/Cu 0.18 4.6 0.07 1.8 0.24 6.1
250S130–RA 0.37 9.4 0.15 3.7 0.29 7.4 0.016 0.4 0.15 3.8 Sn/Ni/Cu 0.18 4.6 0.07 1.8 0.24 6.1
250S130–RB 0.37 9.4 0.15 3.7 0.29 7.4 0.016 0.4 0.15 3.8 Sn/Ni/Cu 0.18 4.6 0.07 1.8 0.24 6.1
250S130–RC 0.37 9.4 0.15 3.7 0.29 7.4 0.016 0.4 0.15 3.8 Sn/Ni/Cu 0.18 4.6 0.07 1.8 0.24 6.1
AD
C
E
BF
H
GG
Soldering Pad Layout
Part Number Ordering Number I hold
(A) I hold Code Packaging
Option Quantity Quantity & Packaging
Code
250S130 250S130DR 0.13 130 Tape and Reel 1500 DR
250S130V 250S130VDR 0.13 130 Tape and Reel 1500 DR
250S130–RA 250S130–RADR 0.13 130 Tape and Reel 1500 DR
250S130–RB 250S130–RBDR 0.13 130 Tape and Reel 1500 DR
250S130–RC 250S130–RCDR 0.13 130 Tape and Reel 1500 DR
Packaging
Part Ordering Number System
250 S 130 -RA D R
PACKAGING STYLE
SURFACE MOUNT
I
HOLD
CURRENT CODE
(Refer to Electrical Characteristics Table)
QUANTITY CODE: D=1500
R: Tape & Reel
(BLANK) = Horizontal / 4-13Ω resistance range
V = Vertical / 4-13Ω resistance range
-RA = Horizontal / 6.5-10Ω resistance range
-RB = Horizontal / 9-13Ω resistance range
-RC = Horizontal / 7-11Ω resistance range
PEAK VOLTAGE RATING
OPTION CODE
Part
Number
ABCDEF
Material
GH I J
Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm
Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max.
250S130V .24 6.1 .27 6.9 .13 3.2 .04 1.0 .07 1.9 .09 2.3 Sn/Ni/Cu .09 2.3 .09 2.4 .25 6.4 .14 3.43
CC
E
B
D
A
G
I
H
H
GJ
Soldering Pad Layout
F
61
©2009 Littelfuse, Inc.
Revised: November 30, 2009
POLYFUSE® Resettable PTCs
250S Series
Surface Mount > 250S Series
250S Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250S.html for current information.
TAPE SPECIFICATIONS:
EIA-481-1 (mm)
REEL DIMENSIONS:
EIA-481-1 (mm)
W16 +/- 0.30 H22.4 +/- 0.05
F7.5 +/- 0.05 W16.4 .0 +0/+2
E11.75 +/- 0.10 DØ60+0.5
D01.5 +/- 0.05 FØ13.0+/- 0.2
D11.00(MIN) CØ340+/- 1.0
P04.00 +/- 0.10 H111+/- 0.5
P112.00 +/- 0.10 W12.2+/- 0.5
P22.00 +/- 0.05 W23.0+0.5
A06.9 +/- 0.10 W34.0+0.5
B09.6 +/- 0.10 W45.5+0.5
Tmax 0.4 +/- 0.10
K03.4 +/- 0.15
Leader Min. 300
Trailer Min. 300
Tape and Reel Specifications
Tape and Reel Diagram
W
4
W
2
W
3
W
1
F
H1
W
C
D
H
D2
K0B0
A0
T
F
W
E1
P2
D0
P0
P1
