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Telecom & Networking

PolySwitch devices for telecommunication and networking applications were initially designed over ten years ago to meet the growing demand for resettable overcurrent protection. These product families help provide protection against power cross and power induction surge as defined in ITU, Telcordia, and UL. Available in chip, surface-mount, and radial-leaded configurations, PolySwitch devices help improve the reliability of customer premise and network equipment world wide.

Find out more about the new PolySwitch TSM600-400F designed to meet the new issue 3 of Telcordia GR-1089.

Download Datasheet (pdf 993KB)
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Tech Fundamentals (pdf 93KB)
Product Series
RoHS/ELV RoHS Compliant
Construction: Surface-
mount		 Surface-
mount		 Surface-
mount		 Surface-
mount		 Surface-
mount		 Surface-
mount
IH at Room Temperature 120mA to 180mA 130mA 170mA | 200mA 80MA 250mA 130mA
IT at Room Temperature 0.24 to 0.65 0.26 0.4 0.16 0.86 0.26
Max Operating Temperature 85°C 85°C 85°C 85°C 85°C 85°C
Vmax Operating Voltage 60V 60V 60V 80V 250V 60V
Rmin 0.80 to 7.90Ω 6.50 to 9.00Ω 1.00 to 4.00Ω 5Ω 1Ω 4Ω
Rmax 2.000 to 12.000Ω 9.000 to 12.000Ω 3.500 to 9.000Ω 11Ω 3.000Ω | 3.500Ω 7Ω
R1 Max (Post Trip) 4.00 to 18.00Ω 15.00 to 20.00Ω 7.00 to 18.00Ω 20Ω 5.00Ω | 7.00Ω 12Ω
VMax Interrupt 250V 250V 600V 250V 600V 250V
UL Rated Current 3A | 10A 3A 3A 3A 3A 3A

Product Series
RoHS/ELV RoHS Compliant
Construction: Through- hole Through- hole
IH at Room Temperature 80mA to 180mA 150mA | 160mA
IT at Room Temperature 0.16 to 0.65 0.30 | 0.32
Max Operating Temperature 85°C 85°C
Vmax Operating Voltage 60V | 100V 250V
Rmin 0.80 to 15.00Ω 4.00 to 9.00Ω
Rmax 2.200 to 22.000Ω 7.000 to 12.000Ω
R1 Max (Post Trip) 4.00 to 33.00Ω 16.00 to 22.00Ω
VMax Interrupt 250V 600V
UL Rated Current 3A | 10A 3A

RoHS Compliant RoHS Compliant

Part Numbering System for PolySwitch Telecommunications and Networking Devices


Agency Recognition for Telecommunications and Networking Devices*
Standard File Number
UL   E74889
CSA   78165C
TUV   Per IEC60730-1
Note: *For agency recognition information on BBR and RXE series, see radial-leaded product page. For SMD, midSMD and miniSMDC series, see surface-mount product page.

Recommended Pad Layout for PolySwitch Telecommunications Surface-Mount Devices


Solder Reflow and Rework Recommendations for PolySwitch Telecommunications and Surface-Mount Devices
Solder Reflow & Rework for Telecom & Surface-mount devices

  • Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and flame.
  • The devices are intended for protection against occasional overcurrent or overtemperature fault conditions and should not be used when repeated fault conditions or prolonged trip events are anticipated.
  • Contamination of the PPTC material with certain silicon based oils or some aggressive solvents can adversely impact the performance of the devices.
  • Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal, and mechanical procedures for electronic components.
  • Operation in circuits with a large inductance can generate a circuit voltage (L di/dt) above the rated voltage of the PolySwitch resettable device.