Switch fuse disconnector OS400D30 3-pole 400A

The OS400D30-3 switch fuse is a three-pole (3P) disconnecting device designed to provide reliable protection and isolation for electrical circuits in industrial applications. It adheres to IEC 60947-3 standards and operates with a rated voltage of up to 690V AC, making it suitable for high-power distribution networks. With a conventional thermal current capacity of 400 A in both free-air conditions and enclosed setups, this unit supports NH fuse sizes (NH0, NH1, NH2) within a DIN-compliant fuse system.

 

Engineered for robust performance even under demanding conditions, the OS400D30-3 offers a rated operational power of up to 400 kW at 690 V AC (AC-23A), alongside exceptional overload protection enabled by its rated conditional short-circuit currents: 100 kA at 500V and 80 kA at 690V. The device features lug terminals with tightening torque requirements between 30–44 N·m for secure installation on base-mounted assemblies. Additional technical specifications include a low-voltage short-time withstand current rating of 14 kA rms over one second.

 

This IP20-rated switch fuse provides frontal operating control while minimizing power losses at just 36 W under full load conditions. It measures compactly with net dimensions of H240 × W270 × D206 mm and weighs approximately 5.865 kg—ideal for space-constrained installations. Compliance declarations such as RoHS, REACH, and CE are available, ensuring adherence to environmental directives and industry regulations during its lifecycle management process. Designed without an integrated handle but adaptable across various infrastructures requiring high-current disconnect solutions, the OS400D30-3 is optimized for efficient energy distribution in commercial or industrial scenarios where reliability is paramount.