NEW Protection Relays & Controls Catalog Now Available

Take a virtual tour of our e-catalog, download a pdf, or request a printed copy

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Now Everyone Can Be Protected

NEW AF0100 Arc-Flash Relay delivers leading arc-flash technology everyone can afford.

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Video: Heavy Duty Battery Switches

500 amp, sealed, IP-rated, dual-pole battery switch disconnects all vehicle electrical power in applications with two circuits, or both positive and negative isolation.

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AF0500 New Littelfuse Arc-Flash Protection Relay
Learn how to mitigate the potentially disastrous impact of arc-flash  Our whitepaper will walk you through reaction time, trip reliability, sensor  design, scalability, and more.  Click here to get the whitepaper  <>
Learn how to choose the right circuit protection for your LEDs.  Our article, Choosing the Right Circuit Protection for LEDs, outlines  instances when certain requirements and technologies should be considered to  ensure the continuous reliability of the LED lighting installation.  Click here to get the article  <>

SP1064 Series TVS Diode Arrays

Proprietary silicon avalanche technology ensures ESD protection

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HMOV™ Varistor Series

For high temperature environment & high surge protection,operates at 125ºC with 2500V isolation voltage for tighter PCB spacing.

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Q4 2016 Earnings Conference Call

Wednesday, February 1, 2017
10:00 a.m. CST • 11:00 a.m. EST


Product information for PolySwitch®, PolyZen®, 2Pro®, battery mini-breakers and more.

Detailed product specifications, agency approvals, application notes and other technical resources.

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New Semiconductor Product
Information Available

Acquired semiconductor product lines are now fully integrated with Thyristors, TVS Diodes, Ignition IGBTs.

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Keep Your Distance and Stay Safe!

The new MP8000 Bluetooth® Enabled Overload Relay can be monitored from your smart phone

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