Manual On Load Changeover Switch 3KJ 4-pole, for power distribution - 3KJ0132-4AA20-0AA0

Product Description

Siemens Manual On-Load Changeover Switch – 3KJ0 Series – 3KJ0132-4AA20-0AA0

The Siemens 3KJ0132-4AA20-0AA0 is a SENTRON / SINOVA 3KJ0 series manual on-load changeover switch designed for safe power source switching and isolation in low-voltage distribution systems. It is widely used in industrial panels, commercial buildings, and backup power systems (DG/utility changeover) where reliable transfer between two power sources is required.

This device is a 4-pole (3P + Neutral) changeover switch with a rated current of 125A, suitable for switching between two power supplies (I–0–II operation) under load conditions. It ensures safe switching without creating short-circuit conditions between sources.

The switch is designed for AC-23A utilization category, making it suitable for switching inductive and mixed loads in demanding electrical installations.

Key Features:

• Siemens SENTRON / SINOVA 3KJ0 changeover switch 

• Manual on-load operation (I–0–II position) 

• 4-pole (3P + N) configuration 

• Rated current: 125A 

• AC-23A duty for industrial load switching 

• Suitable for DG–mains / mains–mains changeover 

• High mechanical durability (~15,000 operations) 

• Compact panel-mounted design 

• Safe isolation and source transfer 

• IEC 60947-3 compliant