Industrial 3DU3R Mini-Circuit Breaker DIN Mount

The Altech 3DU3R is a UL1077-listed, three-pole R-Series mini-circuit breaker engineered for DIN-rail mounting in industrial control panels, delivering compact, modular overcurrent protection for three-phase circuits with a D-Trip profile. Although specified at 3 A for this variant, the R-Series devices provide a 0.5–63 A current-range per pole and are designed to operate at up to 480 VAC, including 480Y/277V 50/60 Hz, with a per-pole width of 17.5 mm to maximize panel density. A key spec is the 10 kA short-circuit withstand capacity, enabling protection against high fault currents, while the UL1077 supplementary protector designation indicates use on control circuits and auxiliary loads within industrial electrical installations. For installation and maintenance, the 3DU3R clips securely onto standard DIN rails, supports quick replacement in existing panels, and is compatible with common three-phase control architectures where compact, reliable protection is required. The compact form factor and DIN-rail compatibility align with standard panel design practices, making the 3DU3R suitable for automation, machine control, and power-supply protection tasks in manufacturing environments.