Miniature Circuit Breakers (MCB)

The Miniature Circuit Breakers (MCB) category covers compact, din-rail-mounted overcurrent protection devices used by controls engineers, panel shops, and machine builders to safeguard branch circuits, control wiring, and individual loads in industrial control panels. Common product types include single-pole and multi-pole supplementary protectors for equipment-level protection, terminal power feed blocks with straight or offset lug configurations for multi-phase bus connections, and trip-curve-selectable MCBs — such as curve B, C, and D variants — matched to resistive loads, general-purpose circuits, or high-inrush motor and transformer applications. Buyers typically select by pole count (1P, 2P, 3P), ampere rating, trip curve, and interrupt capacity to meet UL 489 or IEC 60898 requirements. With over 650 SKUs in stock, this category supports full panel builds from branch circuit protection through main disconnect coordination.