OTN20 – GOULD 20A 250V CLASS K5 ONE-TIME FUSE

A Class K5 one-time fuse like the Gould OTN20 is a single-use cartridge fuse — once it clears a fault or overload, the entire fuse must be replaced. A renewable fuse, by contrast, has a replaceable element inside a reusable body. The OTN20's 50kA interrupting rating makes it suitable for circuits where high fault currents are possible, offering a higher level of protection than a standard Class H fuse.

Yes. The OTN20 (20A / 250V / Class K5) has widely accepted cross-references, including the Bussmann NON-20 and Littelfuse NLN-20. Any Class K5 or Class H one-time fuse of the same amperage (20A) and voltage rating (250V) in the correct physical size is generally an acceptable substitute. We recommend confirming the replacement meets your application's interrupting rating (50kA) and any applicable CSA or code requirements.

The Gould OTN series is a legacy product line, and availability through standard distribution channels can be limited. Northern Breaker Group specialises in obsolete and hard-to-find electrical components across Canada. Contact our Calgary, Edmonton, or Vancouver counters — or request a quote online — and we'll do our best to locate the OTN20 or confirm the best available cross-reference for your application.