Circuit Protection, Fuses, Power Control & Sensing Solutions

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Solutions for Power Tool Design

Reliable Solutions for Power Tool Design

Littelfuse components enable efficient switching, precise control, and robust circuit protection in power tool design. Explore our Power Tools application page to learn more.

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Industrial Fuse Manufacturing

Newest Fuse Plant Boosts Capacity

Our newest fuse manufacturing plant in Piedras Negras, Coahuila, Mexico delivers precision with innovative automation and also furthers our sustainability commitment.

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Most Responsible Company Award

Named a 2025 Most Responsible Company

For the third consecutive year, Newsweek and Statista name Littelfuse as an industry leader dedicated to driving meaningful global impact.

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Better Battery Management

Seek Better Battery Protection & Control

Learn about our innovative products for enhancing the safety and efficiency of rechargeable lithium batteries in smartphones, power tools, EVs, and wind or solar farm BESS.

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Featured Products

Tactile Switches

KSC2 Dual Circuit Technology with 3.5 mm Actuator Height

The Littelfuse|C&K innovative tactile switch series offers a 3.5 mm actuator height, lower than the KSC4 DCT with its 5.2 mm actuator height. Combined with single pole double throw (SPDT) functionality and the Electrical Height specification, the KSC2 DCT delivers unmatched functionality in a compact, space-saving design.

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two - KSC2 DCT Tactile Switches with Compact 3.5mm Actuator

AEQ101 T&R

Series: TPSMB - TPSMB150CA

The TPSMB150CA, part of the TPSMB series, is AEC-Q101 qualified for automotive use. This TVS diode protects sensitive automotive components from transient voltage, ensuring reliable performance.

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SRP1 Series Solid-State Relays

High-Endurance Industrial Solid-State Relays

High reliability, fast switching and superior uptime for the most demanding applications that demand extensive on/off switching.

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Electronic On/Off Switches

HCC & HCD Series Definite Purpose Contactors

Look to Littelfuse when your application demands a compact, long-lived contactor controlled by a thermostat, relay, or push button.

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Bolt-Down Single Fuse Holders

ZCASE® SMZ Series Fuse Holder

The ZCASE® SMZ Series Bolt-Down Fuse Holder simplifies installation by enabling ZCASE® high-current fuses to mount directly on an alternator, battery switch, or relay, reducing wiring and parts.

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AF0025 Series Arc-Flash Relay

Compact Arc-Flash Detection & Protection Solutions

Space-saving AF0025 relays provide ideal solutions for protecting combiner boxes and panels against damaging arc flashes. The relays work in ac or dc systems and feature internal failsafe mechanisms.

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TTP Platform

Series: TTP

The TTape platform is a distributed temperature monitoring technology for battery packs that helps to improve the detection of localized cell overheating. This helps to increase the lifetime of batteries and provides thermal runaway protection.

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Empowering a Sustainable, Connected, and Safer World

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Applications Spotlight

Power Train Components

Explore how Littelfuse solutions help improve the safety, reliability, and functionality of the various systems that make up the modern electric vehicle’s power train.

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