NRN70 – GOULD 70A 250V CLASS H ONE-TIME FUSE

A Class H one-time fuse (like the NRN70) opens the circuit immediately upon a sustained overload or short circuit — it does not have a built-in delay. Time-delay (dual-element) fuses, such as those in Class RK1 or RK5, can tolerate brief motor start-up surges without blowing. If your application involves motor loads with high inrush currents, a time-delay fuse is often the better choice; the NRN70 is best suited for general lighting, heating, and non-motor circuits.

Yes — the NRN70 follows the standard Class H cartridge fuse form factor (70A, 250V, knife-blade), so it can be replaced with any equivalent Class H one-time fuse at the same amperage and voltage rating from manufacturers such as Bussmann (NON70) or Ferraz Shawmut. Always verify the replacement carries the same or higher interrupting rating (10kA minimum) and is approved for your jurisdiction. Contact our team if you need help sourcing an exact or approved cross-reference.

Yes — Northern Breaker Group specializes in hard-to-find and obsolete electrical components, including legacy Gould fuses. The NRN series Class H fuse remains available through our inventory and supplier network. Whether you need a single replacement or a larger quantity for an aging facility, contact our Calgary, Edmonton, or Vancouver counter for a quote and lead-time confirmation.