Littelfuse PolySwitch Resettable PPTCs | New Product Brief
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Littelfuse PolySwitch Resettable PPTCs
Littelfuse TSM250 PolySwitch Resettable PPTCs are designed for secondary overcurrent protection in telecom applications.
The TSM250 features two resistance-matched 250V PPTCs in a single surface mount package to reduce board space and improve assembly efficiency. Littelfuse TSM250 PolySwitch PPTCs have low parasitic capacitance and a flat impedance response over frequency for consistent and reliable operation.
The devices provide tip and ring overcurrent protection with a fast time to trip. The PPTCs can handle very high voltage surges and are designed to protect against power cross and power induction surges, aiding compliance with various ITU-T and Telecordia certification requirements.
- Dual 250V resistance-matched PPTCs
- Line balance: 0.5Ω
- Low parasitic capacitance
- Flat impedance versus frequency
- Optimized for tip and ring overcurrent protection
- Fast time to trip: 1.0sec @ 1.0A
- Voltage withstand: 250V max
- Hold current: 130mA
- Aids compliance with:
- ITU-T K.20, K.21, and K.45
- Telcordia GR-1089 intra-building
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