Siemens SENTRON 4-Pole Miniature Circuit Breaker, Type B, 50A, 400V AC, 10kA, DIN Rail - 5SY4450-6

Siemens 5SY4450-6 SENTRON series miniature circuit breaker is an advanced protection device engineered for applications where secure and reliable circuit isolation and overcurrent protection are essential. Engineered to meet demanding requirements in industrial, commercial, and residential electrical installations, this MCB provides protection against short circuits and overload conditions in multi-phase distribution systems operating up to 400V AC.

With a 4-pole configuration and a current rating of 50A, this circuit breaker is well-suited for three-phase installations and loads. Type B tripping characteristics ensure prompt response to sudden overcurrent conditions, particularly effective for protecting generators, personnel, and installations with long cable runs. The high breaking capacity of 10kA enhances protection and reduces risk in high fault current scenarios.

Rated operational voltage: 400V AC, making it suitable for a wide array of electrical systems. High breaking capacity (10kA) supports safe and reliable operation in environments with potential high-fault currents. DIN rail mounting supports quick installation and easy integration into new or existing panels.

Screw terminal connections guarantee secure and durable wiring. The device offers IP20 ingress protection, shielding from accidental contact with live components and dust. The toggling actuator simplifies manual switching and resetting post-trip.

Meets major international safety and quality standards, including CE, EAC, and CCC marks.

This breaker can be combined with supplementary components, such as shunt releases, fault signal contacts, control current switches, under-voltage releases, or RCCB units, to further enhance person and fire protection. Typical use cases include industrial automation panels, building and facility distribution boards, and heavy-duty residential circuits where electrical reliability and safety are paramount.

Physical construction includes a compact body sized at 90x76x90 mm (H x W x D). The robust design assures extended product life and serviceability even under demanding operating conditions.

Industrial and automation panels for critical applications. Commercial and residential building circuit distribution. Retrofitting or upgrading multi-phase systems to meet safety standards.

Choose Siemens SENTRON 5SY4450-6 for dependable circuit protection and integrate it into your electrical panels for lasting, reliable performance. Explore more miniature circuit breakers from Siemens and other trusted electrical brands at EnvMart.

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