POLYFUSE® Resettable PTCs
Surface Mount > 250S Series
250S Series
Description 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
• RoHS Compliant, Directive 2002/95/EC • Lead-Free & Halogen-Free • Low resistance • Compatible with telecom standards Applications • Customer Premises Equipment (CPE) • Central Office (CO)/ telecom centers
• Helps meets ITU K.20, K.21/Telcordia standards • Excellent solder joint inspectability • High voltage
• LAN/WAN equipment • Access equipment
Electrical Characteristics
Device Mounting Layout Time to Trip at 1A Typical (Sec.) 0.9 1.4 0.7 1.1 2.0 Maximum (Sec.) 4.0 4.0 4.0 4.0 4.0 R min (Ω) 4 6.5 9 7 4 Resistance R max (Ω) 13 10 13 11 13 R 1max (Ω) 20 15 20 17 20 Agency Approvals
Part Number
I hold (A) 0.13
I trip (A) 0.26 0.26 0.26 0.26 0.26
V max (Vint /Vop) 250/60 250/60 250/60 250/60 250/60
I max (A) 3 3 3 3 3
Pd typ. (W) 1.2 1.2 1.2 1.2 1.2
250S130 250S130–RA 250S130–RB 250S130–RC 250S130V Vertical Horizontal
– – – – –
0.13 0.13 0.13 0.13
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.
©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/250S.html for current information.
57 250S Series Revised: November 30, 2009
250S Series
Features
POLYFUSE® Resettable PTCs
Surface Mount > 250S Series
Temperature Rerating
Ambient Operation Temperature -40°C Part Number 250S130 0.21 0.19 0.17 0.13 -20°C 0°C 23°C 40°C Hold Current (A) 0.11 0.10 0.09 0.07 0.05 50°C 60°C 70°C 85°C
Average Time Current Curves
Temperature Rerating Curve
0.13A
200.00
1000
250S
160.00
Percentage of rated current %
120.00
100
Time in Seconds
80.00
40.00
10
0.00 -40.00 0.00 40.00 80.00 120.00
Device Ambient Temperature ºC
1
Agency Specification Selection Guide For Telecom and Networking Applications
0.10 0.1
Product
1 10 100
Lightning ITU K.20/21/45 – 1.5kV 10/700μs
Power Cross ITU K.20/21/45 – 230Vac, 10Ω
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.
250S130 250S130V 250S130-RA 250S130-RB 250S130-RC
Protection Application Guide
Region/ Specification South America/ Asia/Europe ITU K.45 Application Access network equipment Remote terminal Repeaters WAN equipment Cross –connect Customer and IT equipment Analog modems ADSL, xDSL Phone sets, PBX systems Internet appliances POS terminals Central Office POTS/ISDN linecards T1/E1/J1 linecards ADSL/VDSL splitters CSU/DSU Device Selection 250S130 250S130V 250S130-RA 250S130-RB 250S130-RC 250S130 250S130V 250S130-RA 250S130-RB 250S130-RC 250S130 250S130V 250S130-RA 250S130-RB 250S130-RC
South America/ Asia/Europe ITU K.21
South America/ Asia/Europe ITU K.20
58 250S Series Revised: November 30, 2009
©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/250S.html for current information.
POLYFUSE® Resettable PTCs
Surface Mount > 250S Series
Soldering Parameters
Profile Feature Average Ramp-Up Rate (TS(max) to TP)
Temperature Min (Ts(min))
Pb-Free Assembly 3°C/second max 150°C 200°C 60 – 180 secs 217°C 60 – 150 seconds 260+0/-5 °C 20 – 40 seconds 6°C/second max 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 (0.010inch) -- Devices can be cleaned using standard industry methods and solvents -- Devices can be reworked using the standard industry practices
Pre Heat:
Temperature Max (Ts(max)) Time (Min to Max) (ts)
Time Maintained Above: Temperature (tL)
Temperature (TL)
Peak / Classification Temperature (TP) Time within 5°C of actual peak Temperature (tp) Ramp-down Rate Time 25°C to peak Temperature (TP)
Physical Specifications
Solder-Plated Copper (Solder Material: Matte Tin(Sn)) Meets EIA Specification RS186-9E, ANSI/ J-STD-002 Category 3.
Environmental Specifications
Operating/Storage Temperature Maximum Device Surface Temperature in Tripped State Passive Aging Humidity Aging Thermal Shock Solvent Resistance Moisture Sensitivity Level
Terminal Material
-40°C to +85°C
Lead Solderability
125°C -/+10ºC +85°C, 1000 hours +85°C, 85%,R.H.,1000 hours MIL–STD–202F Method 107G , +125°C to -55°C 10 times MIL–STD–202, Method 215F Level 1, J–STD–020C
©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/250S.html for current information.
59 250S Series Revised: November 30, 2009
250S Series
POLYFUSE® Resettable PTCs
Surface Mount > 250S Series
Dimensions
C B A
A
Inch Max. mm Max. Inch Max.
H F
D
E
G
D E
mm Max. Inch Max. mm Max.
G
F G
mm Inch Max. mm Max. Inch Max.
Soldering Pad Layout
Part Number 250S130 250S130–RA 250S130–RB 250S130–RC
B
mm Max. Inch Max.
C
mm Max. Inch Max.
H
mm Max.
Material Sn/Ni/Cu Sn/Ni/Cu Sn/Ni/Cu Sn/Ni/Cu
Inch
Max. Max.
0.37 0.37 0.37 0.37
9.4 9.4 9.4 9.4
0.15 0.15 0.15 0.15
3.7 3.7 3.7 3.7
0.29 0.29 0.29 0.29
7 .4 7 .4 7 .4 7 .4
0.016 0.016 0.016 0.016
0.4 0.4 0.4 0.4
0.15 0.15 0.15 0.15
3.8 3.8 3.8 3.8
0.18 0.18 0.18 0.18
4.6 4.6 4.6 4.6
0.07 0.07 0.07 0.07
1.8 1.8 1.8 1.8
0.24 0.24 0.24 0.24
6.1 6.1 6.1 6.1
A
C I G B H E
C D
mm Inch mm Inch
G H
J
D F
Part Number 250S130V A
Inch mm Inch
Soldering Pad Layout
B
mm Inch
E
mm Inch
F
mm
G H I J Material 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.
.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
Part Ordering Number System
250 S 130 -RA D R
PACKAGING STYLE R: Tape & Reel QUANTITY CODE: D=1500 OPTION CODE (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 I HOLD CURRENT CODE (Refer to Electrical Characteristics Table) SURFACE MOUNT PEAK VOLTAGE RATING
Packaging
Part Number 250S130 250S130V 250S130–RA 250S130–RB 250S130–RC Ordering Number 250S130DR 250S130VDR 250S130–RADR 250S130–RBDR 250S130–RCDR I hold (A) 0.13 0.13 0.13 0.13 0.13 I hold Code 130 130 130 130 130
60 250S Series Revised: November 30, 2009
Packaging Option Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel
Quantity 1500 1500 1500 1500 1500
Quantity & Packaging Code DR DR DR DR DR
©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/250S.html for current information.
POLYFUSE® Resettable PTCs
Surface Mount > 250S Series
Tape and Reel Specifications
TAPE SPECIFICATIONS: EIA-481-1 (mm) W F E1 D0 D1 P0 P1 P2 A0 B0 Tmax K0 Leader Min. Trailer Min. 16 +/- 0.30 7 +/- 0.05 .5 1.75 +/- 0.10 1.5 +/- 0.05 1.00(MIN) 4.00 +/- 0.10 12.00 +/- 0.10 2.00 +/- 0.05 6.9 +/- 0.10 9.6 +/- 0.10 0.4 +/- 0.10 3.4 +/- 0.15 300 300 REEL DIMENSIONS: EIA-481-1 (mm) H W D F C H1 W1 W2 W3 W4 22.4 +/- 0.05 16.4 .0 +0/+2 Ø60+0.5 Ø13.0+/- 0.2 Ø340+/- 1.0 11+/- 0.5
3.0+0.5 4.0+0.5 5.5+0.5
Tape and Reel Diagram
H P1 P0 D0 P2 E1 W4 W3 D F W W2
C
T
D2
F W1
W
A0
K0
B0
H1
©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/250S.html for current information.
61 250S Series Revised: November 30, 2009
250S Series
2.2+/- 0.5
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