NRN300 – GOULD 300A 250V CLASS H ONE-TIME FUSE

The Gould NRN300 is a Class H, one-time (non-renewable) fuse rated 300A / 250V with a 10kA interrupting rating. It fits standard Class H fuse holders and disconnect switches designed for 300A, 250V cartridge fuses (blade/ferrule configuration). Common compatible holders include those accepting NRN/NRS-series cartridge fuses from Gould, Bussmann (NON), and other Class H equivalents of the same amperage and voltage class.

• Direct equivalent replacements: Bussmann NON-300, Ferraz Shawmut/Mersen ONE-TIME equivalents at 300A/250V Class H
• Upgrade option: Consider a Class K5 or Class RK5 fuse (e.g., Bussmann FRN-R-300) for improved current-limiting performance in the same holder

Not sure if this fuse matches your holder or disconnect? Send us your equipment model and we'll confirm compatibility.