Manual On Load Changeover Switch 3KJ 4-pole, for power distribution - 3KJ0134-4AA20-0AA0

Product Description

Siemens Manual On-Load Changeover Switch – 3KJ0 Series – 3KJ0134-4AA20-0AA0

The Siemens 3KJ0134-4AA20-0AA0 is a SENTRON / SINOVA 3KJ0 series manual on-load changeover switch designed for safe power source switching between two supplies (I–0–II) in low-voltage distribution systems. It is widely used in industrial panels, commercial buildings, and DG backup systems where reliable manual transfer between mains and generator or dual mains supply is required.

This model belongs to the 3KJ0 series (160A class) and features a 4-pole configuration (3P + Neutral), ensuring complete switching of all phases and neutral for safe isolation and transfer under load conditions.

It is designed for AC-23A duty, making it suitable for switching inductive and mixed loads such as motors, pumps, HVAC systems, and general industrial distribution.

Key Features:

• Siemens SENTRON / SINOVA 3KJ0 changeover switch 

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

• 4-pole (3P + Neutral) configuration 

• Rated current: 160A 

• AC-23A utilization category for industrial load switching 

• Suitable for mains–generator / mains–mains changeover 

• High mechanical durability and reliable switching performance 

• Compact panel mounting design 

• Break-before-make mechanism for safe transfer 

• IEC 60947-3 compliant