AG60 – GOULD 60A 480V CLASS G TIME DELAY FUSE

Class G fuses have a smaller, rejection-style ferrule body with a specific diameter that prevents them from being installed in Class H or Class R holders, and vice versa. This rejection feature is a deliberate safety design. You must use a holder or fusible switch specifically rated for Class G fuses. Do not attempt to interchange fuse classes, even if the amperage and voltage ratings appear to match.

Gould's fuse product line was acquired by Ferraz Shawmut and is now marketed under the Mersen brand. The AG60 may still be available as new-old-stock, and direct equivalents exist in the current Mersen catalogue (such as the ATQ60). Northern Breaker Group specializes in obsolete and hard-to-find parts — contact us and we'll check current stock and confirm the best available replacement.

Motors and transformers draw a high inrush current at start-up — often 6–8× their full-load rating — for a brief period. A time-delay (TD) fuse like the AG60 is designed to tolerate this temporary overload without opening, while still providing fast, reliable protection against sustained overloads and short circuits up to 100kA. Using a fast-acting fuse in these applications often results in nuisance blowing during normal start-up.