Westhomes New Design DIN Rail Fixed Circuit Breaker Wcm7EL 35ka-85ka ODM OEM 1-4p

This version of the WCM7EL features a redesigned housing optimized for direct DIN-rail mounting on a standard 35mm EN 60715 rail, combining the high breaking capacity (35kA–85kA) of a heavy-duty MCCB with the space-saving, tool-light installation of a rail-mount device. It addresses a common industry need: a compact, high-fault-rated breaker that fits modular panel layouts without custom busbar fabrication.

DIN-rail mounting allows the breaker to be snapped onto a standard rail by hand (or with a simple screwdriver release) instead of bolting it to a mounting plate. It reduces panel-build labor time, makes replacement faster during maintenance, and standardizes spacing across panel designs. Bolt-on mounting, still available on larger frames, offers greater mechanical robustness for very high current ratings and vibration-prone environments.

The DIN-rail variant of the WCM7EL is available in 35kA, 50kA, 65kA, and 85kA breaking capacities at 400/415V AC. Not every frame size may be DIN-rail compatible — the highest-current, highest-breaking frames may still require bolt-on mounting due to physical size and busbar requirements. Always verify frame size and mounting compatibility with the datasheet before selection.

The DIN-rail WCM7EL is offered in 1P, 2P, 3P, and 4P configurations to cover single-phase sub-distribution through three-phase four-wire industrial feeds. 3P and 4P versions are the most popular for motor control centers, machine tool feeds, and distribution boards; 1P/2P versions suit control transformers, single-phase UPS feeds, and lighting/distribution sub-panels.

Yes — modern high-performance MCCB designs use optimized arc-chute geometry, silver-tungsten contact tips, and precision-molded housings to achieve 65kA–85kA breaking capacity within a DIN-rail-footprint body. This is a significant engineering achievement: it means panel builders no longer need a full-size drawout MCCB or ACB for very high fault currents. However, ensure the rail, busbar, and enclosure are rated for the fault energy the breaker will interrupt.

The DIN-rail version typically comes with a thermal-magnetic trip unit as standard, with electronic trip units available on selected frame sizes. Thermal-magnetic units offer fixed long-time and instantaneous protection suited to straightforward feeder and motor circuits. Electronic units add adjustable protection settings for selective coordination in more complex distribution systems.

Yes, Westhomes provides ODM/OEM services for the DIN-rail WCM7EL, including custom front labeling with your brand logo, tailored nameplate ratings, matched color housings, and private-label packaging. Minimum order quantities apply. This makes it well suited for panel builders, electrical distributors, and system integrators looking to offer a high-fault-rated MCCB under their own brand.

Snap the upper rear hook of the breaker onto the top edge of the DIN rail, then pivot the breaker downward until the lower latch clicks into place. To remove, insert a flat screwdriver into the release slot and pull the breaker outward while unlatching. Always isolate the supply before installation or removal. Torque the line and load terminals to the value listed on the breaker nameplate, and maintain the recommended minimum spacing above and below for arc ventilation.

Yes, the DIN-rail WCM7EL is type-tested and certified to IEC 60947-2, the international standard for low-voltage circuit-breakers. This means its 35kA–85kA breaking capacities, current ratings, endurance, and temperature rise have all been verified by an independent test lab to meet global safety benchmarks. It can be used on international projects without additional regional re-certification, subject to local wiring rules.

Common uses include: modular switchboards in commercial buildings where space is tight, machine-tool and OEM machine feeds where DIN-rail assembly is standard, renewable-energy combiner panels, UPS output distribution, and data-row power distribution units. It is especially valued where available fault current is high (e.g., near a large transformer) but the panel builder wants the cost and space savings of DIN-rail construction rather than a traditional bolt-on MCCB lineup.