Login  Register
  Optifuse for your fuse needs...

    PART NUMBER Search:
Become An OptiFuse Distributor
Become An OptiFuse Rep
Join the Optifuse Team
About OptiFuse Selection Guide Glossary of Terms Privacy Statement Site Map Contact OptiFuse
December 7, 2009
High Temperature Resettable Fuses

There are several good reasons to employ a resettable PTC fuse in a circuit design but by and far the best reason is of course that the component automatically "resets" itself after it has acted to open a faulted circuit.

The device has all of the benefits of a fuse (protecting against both short-circuits and overloads) without the downside of having to replace the part once it’s opened one time.

Resettables - Radial

One of the downsides of a resettable PTC fuse has been it relatively narrow usable temperature range especially in non-controlled environments such as automotive applications. 

OptiFuse’s new high-temperature resettable fuses have all but eliminated this persistent problem.  The new OptiReset RS16HT and RS30HT now have an operating temperature range of -40° C to +125° C (-40° F to +257° F) allowing the fuse to perform in the most harsh of environments (most resettable fuses are only rated to 80° C / 146° F).

The new high temperature resettable fuses have a wide current range of 500mA to 15A at voltages of 16 VDC (the 500mA, 700mA and 1A fuses have a voltage rating of 30 VDC).

The OptiFuse parts cross to the Raychem Tyco RHEF series and the Bourns MF-RHT series.  At this time, it doesn’t appear that Littelfuse has a high temperature resettable fuse.

Unfortunately the data sheet for this part won’t be available until later this week on the OptiFuse website.

Not every application has the need for a high-temperature resettable fuse.  However, in those situations where temperatures can be extreme, at least now you know that you have a solution to your problem.

Thank you very much for supporting OptiFuse where we hope to provide you a new solutions to old problems.

Jim Kalb


Home  |  Cross-Ref List   |  Products  |  Contact Us