Littelfuse 0.25A Resettable Fuse, 250V dc

TE PolySwitch TSM Series of telecommunications and networking devices provide protection against damage caused by power cross and power induction surges as defined in ITU, Telcordia GR1089 and UL60950. Typically used in modems, fax machines, alarm systems, xDSL modems and splitters, T1/E1 equipment, analog and digital line cards, VoIP (Voice over Internet Protocol) equipment, LAN, WAN equipment and access network hardware applications.

Resettable overcurrent protection
Surface-mount, radial-leaded and chip form factors
Fast time-to-trip
Low parasitic capacitance/flat impedance with frequency
RoHS compliant

PCB Wire Ended

All are UL, CSA, TUV approved
Protection of electrical and electronic circuits against excessive currents
Rapid switch from low resistance state to very high resistance with electrical overload or short circuit
Quick and automatic reset and return to low resistance state when fault condition corrected and power removed

Features:

Automatically resets itself thousands of times
Maintenance free
Small size and no fuseholder required

Main applications:

Security systems
Power supplies and transformers
Power switching devices
Automotive and medical equipment
Instrumentation and control
Computers and peripherals
Audio visual and telecommunications