Fuses & Protection
Fuses & Circuit Protection Components
Whether you're building a custom PCB, wiring a vehicle, or safeguarding sensitive electronics from voltage spikes, reliable circuit protection is non-negotiable. Our Fuses & Protection collection brings together a comprehensive range of thermal cutoff fuses, glass tube fuses, blade fuse kits, TVS diodes, and resettable circuit breakers — all sourced for quality and engineered to protect your circuits when it matters most. From compact surface-mount TVS diodes to industrial-grade ceramic fuses, you'll find the right component for every application.
Featured Products
- 10-Pack 185°C Ceramic Thermal Cutoff Fuse RF250V 10A – One-shot thermal protection ideal for appliances, motors, and power supplies that must disconnect at precise over-temperature thresholds.
- 100 Pcs Fast-Blow Glass Fuse Kit 5x20mm 250V – 10 Values – A versatile assortment covering the most common current ratings, perfect for workshops, repair benches, and prototype builds.
- 100-Piece Car Blade Fuse Kit 15A–35A with Storage Box | ATC/ATO – Keep your vehicle's electrical system protected with a full range of ATC/ATO blade fuses neatly organised in a carry case.
- 100pcs TVS Diode SOD-323 DFN-2020-3 ESD Surge Protection – Ultra-compact transient voltage suppressors designed to clamp ESD and surge events in high-density PCB layouts.
- 15A Push Reset Circuit Breaker Overload Protector 125/250VAC – A resettable breaker that eliminates the hassle of fuse replacement — simply push to reset after an overload event.
Why Choose Our Fuses & Protection Components?
- Wide Selection: Glass, ceramic, blade, and surface-mount formats covering automotive, industrial, and consumer electronics applications.
- Value Kits: Multi-pack and assortment kits reduce per-unit cost and ensure you always have a spare on hand.
- Reliable Ratings: Components rated to industry-standard voltages and currents — 250V glass fuses, 500V ceramic fuses, automotive ATC/ATO blade fuses, and more.
- ESD & Surge Protection: TVS diodes in multiple packages (SOD-323, SMC DO-214AB, DFN1006-2) for board-level transient suppression.
- DIY & Pro-Ready: From panel-mount fuse holders to pre-packaged automotive kits, every item is designed for easy integration.
Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: What is the difference between a fast-blow and a slow-blow fuse?
A: A fast-blow (quick-acting) fuse opens the circuit almost instantly when the rated current is exceeded, making it ideal for protecting sensitive electronics that cannot tolerate even brief overloads. A slow-blow (time-delay) fuse tolerates short current surges — such as motor start-up inrush — before blowing, reducing nuisance trips in inductive or capacitive loads. Always match the fuse type to your circuit's characteristics.
Q: What is a TVS diode and how does it protect my circuit?
A: A Transient Voltage Suppressor (TVS) diode is a semiconductor device that clamps voltage spikes caused by ESD (electrostatic discharge), lightning coupling, or inductive switching. When the voltage across it exceeds its breakdown threshold, the TVS diode conducts and diverts excess energy away from sensitive components, protecting them from damage. They are available in unidirectional and bidirectional versions to suit AC or DC signal lines.
Q: How do I choose the correct automotive blade fuse rating?
A: Always replace an automotive blade fuse with one of the same amperage rating as printed on the fuse body and specified in your vehicle's fuse box diagram. Using a higher-rated fuse will not protect the wiring and can cause fires. Our 180-Piece Car Fuse Assortment Kit covers Mini, Standard, and Micro blade fuse sizes so you have the right rating ready to go.
Q: What does a thermal cutoff (TCO) fuse do?
A: A thermal cutoff fuse is a one-time, non-resettable device that permanently opens a circuit when the ambient or component temperature exceeds a specific threshold — for example 185°C for the RF250V series. They are commonly used in hair dryers, coffee makers, motors, and transformers to prevent fire hazards caused by overheating. Once triggered, the fuse must be replaced.
Q: Can I use a resettable circuit breaker instead of a fuse?
A: Yes, in many applications a resettable push-reset circuit breaker is a convenient alternative to a traditional fuse. After an overload trips the breaker, you simply press the reset button to restore power — no replacement part needed. They are especially useful in marine, RV, and industrial panels where quick recovery is important. However, always verify the breaker's voltage and current rating matches your circuit requirements.
