ATDR1/2 – GOULD 1/2A 600V CLASS CC TIME DELAY FUSE

The GOUATDR1/2 uses the standard Class CC form factor (13/32" × 1½"), so it fits any Class CC fuse holder or fusible disconnect block rated for 600V. Common compatible holders include those from Littelfuse, Mersen, and Eaton/Bussmann designed specifically for Class CC fuses. Do not install it in a midget or Class J holder — the rejection feature ensures it will only fit proper Class CC holders.

The Gould ATDR series has transitioned through several brand changes (Gould → Ferraz Shawmut → Mersen). A current equivalent is the Mersen ATDR1/2. Cross-references from Littelfuse (CCMR-1/2) and Eaton/Bussmann (FNQ-R-1/2) may also apply, but always verify voltage, amperage, and time-delay characteristics match your application before substituting. Contact us and we'll help source the right replacement.

The ATDR series is specifically designed to handle the inrush currents common in motor branch circuits, control transformers, and solenoid applications without nuisance tripping. The time delay allows temporary overloads (like motor start-up) to pass through, while still providing fast, reliable protection against sustained overloads and short circuits. For purely resistive loads with no inrush, a fast-acting fuse may be appropriate — but for motor or transformer protection, the ATDR time delay design is generally the preferred choice.