Littelfuse Poly-Fuse 1812L - Resettable 1.95A PTC Fuse - Cover Expand

Littelfuse Poly-Fuse 1812L - Resettable 1.95A PTC Fuse



The Littelfuse 1812L Poly-Fuse is a Resettable PTC Fuse capable of holding 33V @ 1.1A, with a trip current of 1.95A for effective circuit protection.

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Although we all like to think that we design our Electronics circuits perfectly, we can’t always control precisely how the electricity running in our circuits is going to behave, and this is especially so when a company like Eskom is in charge of providing our primary source here in SA. Fortunately though, we don’t necessarily have to design our circuits perfectly while accommodating all of the weird and wonderful ways that electricity could suddenly change or deviate from the expected, as we can instead simply integrate handy fuses into our circuits, which can protect sensitive Components in case of unexpected mishaps.

This Littelfuse Poly-Fuse 1812L is a Resettable 1.95A PTC Fuse that is designed for surface mount integration into circuits, and features a relatively high 1.1A hold current with a trip-current of 1.95A and a trip time of just 0.5 seconds. It is capable of withstanding up to 33V DC, and is resettable, which means that you can simply reset the fuse after a mishap, rather than installing a brand new fuse each time it blows. Just remember that you can’t push this fuse beyond 20A current, as this will permanently damage the fuse, and you will then have to replace the entire unit to get your circuit running (or simply protected) once more.

Please Note: These units are priced individually but sold in minimum order quantities of five (5), so as to save on shipping costs and reduce the overall price for each unit.


Littelfuse 1812L Resettable 1.95A Poly-Fuse  -  Technical Specifications:

  • Hold Current

– 1.1A                                                                          

  • Trip Current

– 1.95A

  • Time to Trip

– 0.5 Seconds

  • Max Current Rating

– 20A

  • Max Voltage Rating

– 33V DC

  • Termination Material

– Tin Plated Copper

  • Minimum Resistance

– 0.06Ω

  • Maximum Resistance

– 0.2Ω

  • Power Dissipation

– 0.8W

  • Package Type


  • Package Size

– 1812

  • Safe Operating Temperatures

– -40° to +85°C

  • Fuse Series

– Littelfuse 1812L

  • Dimensions

– (L)4.73 x (W)3.41 x (H)2mm


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