The ABB OS400J03 is a front-operated, 3-pole fusible disconnect switch designed for reliable motor disconnects and industrial control panel applications. It offers enhanced safety with finger-proof, dead-front construction and terminal shrouds to prevent accidental contact with live parts. The modular design allows for flexible installation with either top or bottom incoming power feeds. For added security, handles can be padlocked in the OFF position. This switch is compatible with Class J fuses and provides clear position indication and superior short circuit protection..The ABB OS400J03 is a 3-pole, front-operated fusible disconnect switch with a rated operational current of 400 A. It has a rated insulation voltage of 1000 V and a rated operational voltage of 500 V. The switch is designed for Class J fuses and has a rated short-time withstand current of 14 kA rms for 1 second, with a rated conditional short-circuit current of 80 kA at 690 V. Its dimensions are 230 mm H x 255 mm W x 176 mm D, and it weighs 6.4 kg. The terminal type is lug terminals with a tightening torque of 30-44 N·m. It meets UL98 and IEC 60947-3 standards.