Knowledge Center
Fuses, explained
Guides, comparisons and how-tos from our applications team. Understand the part, then find it in the catalogue. More articles are being added — check back soon.
How to Read a Fuse: Amp Rating, Voltage & Color Codes
A fuse encodes at least four specs beyond the amp number. Here's how to decode the markings and use colour codes as a cross-check.
Read → Guides30 Amp Fuse Guide: Types, Uses & How to Pick
30 amp is a rating, not a shape — the same 30A rating comes as blade, JCASE, glass-tube, plug and stud-mount fuses. Here's how to identify the right type, verify the spec, and avoid the two mistakes that create hazards.
Read → GuidesComplete Guide to Fuse Types (with Diagrams)
Fuses sort by reset behaviour, speed, AC/DC, breaking capacity and form factor. Here's the map of every common family and where you'll meet it.
Read → GuidesChoosing a Solar PV Fuse: 1000V vs 1500V DC
A solar string fuse must be gPV-rated and matched to the array's maximum cold-corrected voltage and string current — ordinary DC fuses won't do.
Read → ComparisonsIsolator Switch vs Fuse Switch Disconnector
An isolator creates a verified break for maintenance; a fuse switch disconnector adds on-load switching and HRC fuse protection. The label rating is what matters.
Read → ComparisonsHRC Fuse vs Semiconductor Fuse Explained
Both are ceramic HRC bodies, but gG and aR fuses do opposite jobs — cable protection vs semiconductor protection — and aren't interchangeable.
Read → GuidesFuse Sizing Guide: Choosing the Right Amp Rating
Correct fuse sizing is a two-part check: big enough for normal load and startup surges, small enough to protect the wire. Both must pass.
Read → How-tosHow to Test a Fuse with a Multimeter
You can't trust your eyes on a blown fuse. A multimeter continuity or voltage test gives a definitive answer in seconds — here's both methods.
Read → How-tosHow to Replace a Blown Fuse Safely
Replacing a fuse safely means matching the exact rating, de-energising first, and stopping if the new fuse blows again — never upsizing or bypassing.
Read → ComparisonsFuse vs Circuit Breaker: Which Do You Need?
Fuses and breakers protect wiring differently — speed, reset behaviour, interrupting capacity and cost trade off. Here's when each is the better specification.
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