Circuit Protection, Fuses, Power Control & Sensing Solutions

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2025 Sustainability Report

Littelfuse 2025 Sustainability Report

Every Littelfuse team member, customer, and partner can spark positive change. Explore our 2025 Sustainability Report to see the impact we’re making together.

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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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Product Cross-Reference Tool

Quickly compare Littelfuse parts against those of other manufacturers to find the right specifications, features, and benefits for your application.

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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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Featured Products

Simple Heating Applications

SRP1-ME Series Solid State Relays

The SRP1-ME Series offers affordable heating solutions with industrial-grade quality and compact design, ideal for tight spaces. Features zero cross switching for less noise and meets safety standards.

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Affordable High Performance

SRP1-CE Series Solid State Relays

The SRP1-CE Series: perfect for demanding areas with IP20 removable protection for safety & easy maintenance. Ideal for HVAC and industrial ovens, it balances cost-effectiveness with high performance.

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DC Output Applications

SRP1-CC Series Solid State Relays

SRP1-CC Series: ideal for DC output applications. Uses MOSFET technology and offers efficient switching with low power dissipation. Use with DC heaters and solenoid valves.

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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

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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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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