YUANKY HWH3 Series Moulded Case Circuit Breaker (MCCB) is a high-performance low-voltage protection device engineered to exceed international safety standards, fully compliant with IEC 60947-2. Available in X160 and X250 frame sizes, it covers rated current ranges from 16A to 160A and 100A to 250A, with 1-pole, 2-pole, 3-pole and 4-pole configurations. Rated for 220V–690V AC at 50/60Hz, it features an 800V rated insulation voltage and 8kV rated impulse withstand voltage, delivering reliable overload, short-circuit and fault protection for diverse power distribution systems.

This MCCB stands out with its double-insulated construction, which enhances electrical safety and provides reliable isolation between live parts and the external housing. It adopts direct opening action, a mechanism recommended by IEC standards for machinery safety, ensuring positive disconnection even under abnormal conditions. For plug-in type MCCBs, a unique safety lock system guarantees that the breaker cannot carry current during installation or removal, protecting maintenance personnel from electrical hazards. Its symmetrical design allows flexible mounting orientation, while optimized internal structure delivers low temperature rise during continuous operation, extending service life and reducing energy loss. All auxiliary accessories are designed for easy and quick fitting, minimizing on-site assembly and maintenance downtime.

The HWH3 series MCCB serves a wide spectrum of industrial, commercial and infrastructure applications. In industrial power distribution systems, it acts as main incoming breakers and branch protectors in low-voltage switchgears and distribution cabinets for manufacturing plants, processing facilities and mining operations. It is also widely applied in machinery control systems, providing reliable power protection for motors, pumps, compressors and production line equipment. In commercial buildings, it protects main distribution boards and heavy-load circuits for shopping malls, office towers and hotel facilities. For OEM equipment manufacturers, it is an ideal built-in protection component for generator sets, welding machines, HVAC systems and electrical control panels. Its plug-in design with safety lock is particularly suitable for data centers and critical power systems where hot-swap maintenance is required.

With superior safety design, comprehensive specifications and reliable breaking performance, YUANKY HWH3 series MCCB provides a cost-effective and safety-assured circuit protection solution for global electrical contractors, panel builders and industrial equipment manufacturers.