OS1250DA03N3P SWITCH FUSE

The OS1250DA03N3P is a 3-pole switch-disconnector fuse designed for robust industrial applications. Rated at 1250A for the main circuit and compliant with IEC 60947-3 standards, it supports operational voltages up to 690V AC, making it suitable for high-demand scenarios like power distribution and heavy machinery control. The device incorporates NH4a DIN-standard fuses and features a detachable neutral link integrated into its mechanism for improved flexibility in different installation setups.

 

Engineered with a front-operated mechanism, the unit includes a pistol-style handle and base mounting configuration. Terminals are lug-type with a width of 50 mm, accommodating various wiring needs while supporting bi-directional line terminal configurations (top-in bottom-out or vice versa). Technical performance highlights include rated conditional short-circuit currents of 100 kA at 500 V and power loss per pole capped at 75 W under rated conditions.

 

With an IP20 degree of protection as defined by IEC 60529 standards, this device ensures safe operation within environments classified at Pollution Degree 3. Additional specifications include rated impulse withstand voltage (12 kV), tightening torque requirements between 50 to 75 N·m, conventional free-air thermal current up to θ =40°C/1250 A, and short-time withstand current capability of up to 40 kA RMS for one second.

 

Designed for seamless integration into modern industrial systems while ensuring reliable performance under demanding conditions, the OS1250DA03N3P delivers versatility paired with precise technical attributes that meet both safety codes and efficiency demands critical for B2B applications.