ATQR3 – GOULD 3A 600V CLASS CC TIME DELAY FUSE

Both are Class CC fuses rated at 600V, but the ATQR series (like the ATQR3) is a time-delay fuse designed to ride through temporary motor inrush currents and short-term overloads without opening. The ATQ series is a fast-acting Class CC fuse better suited for semiconductor or transformer protection where no delay is desired. Choose the ATQR when protecting motor branch circuits or control transformers that see predictable startup surges.

The Gould ATQR brand has transitioned through Ferraz Shawmut to Mersen over the years, and availability of specific catalogue numbers can vary. Direct equivalents include the Bussmann ATQR3 and Littelfuse CCMR3 — both Class CC, 3A, 600V time-delay fuses with a 200kA interrupting rating. Northern Breaker Group specialises in obsolete and hard-to-find fuses; contact us for current stock and cross-reference options.

The ATQR3 is rated for up to 600V AC, so it is electrically suitable for 120V or 240V circuits. However, Class CC fuses are an industrial/commercial form factor and require a dedicated Class CC fuse holder or block — they are not designed for standard residential fuse panels. This fuse is best applied in control panels, motor control centres, and industrial distribution equipment. If you need residential branch-circuit protection, a different fuse type would be more appropriate.