LSP05GI Series LED Lighting
Surge Protection Modules

10kV/5kA module approved to IEC/EN 61643-11, optimal for use in outdoor lighting

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True Surface Mount LTKAK6 & LTKAK10 Series TVS Diodes

Ideal for protecting mobile phone base stations and industrial TVSS

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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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Keep Your Distance and Stay Safe!

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

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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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Littelfuse will be at ConExpo 2017!

Visit us in booth G70503 to view the newest heavy duty electrical switches, power distribution modules, relays and sensors!

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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  <>

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

Newly acquired semiconductor product lines now available: Thyristors, TVS Diodes, Ignition IGBTs.

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Play. Learn. Win!

Play the Littelfuse GO SMART Interactive Game to learn more about the MP8000 and enter to win a 7th generation iPhone!

Play Now!