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The NRN40 – GOULD 40A 250V CLASS H ONE-TIME FUSE provides reliable protection against overcurrent, ensuring the safety and longevity of your electrical systems. Designed for one-time use, this robust fuse quickly interrupts power flow during fault conditions. Perfect for various applications, it guarantees optimal performance and peace of mind for your electrical installations.
The NRN40 is a one-time (non-renewable) fuse — once it blows due to an overcurrent or fault, the entire fuse must be replaced. A renewable fuse, by contrast, allows you to replace just the internal fuse element. The NRN series is generally preferred where reliability and tamper-resistance are priorities, and it is still widely used in legacy industrial and commercial equipment across Canada.
Class H holders accept Class H, K, and some RK fuses of the same voltage and ampere rating, since they share the same physical dimensions. However, Class K and RK fuses offer higher interrupting ratings, which can be a worthwhile upgrade if your system fault current exceeds the NRN40's 10kA rating. Always verify that the replacement fuse's voltage and ampere ratings match your application and that the holder is rated accordingly.
Yes — Northern Breaker Group specialises in obsolete and hard-to-find electrical components, including legacy Gould fuses like the NRN series. Stock levels vary, so we recommend contacting our Calgary, Edmonton, or Vancouver locations or submitting a quote request to confirm current availability for the NRN40.
