Manual On Load Changeover Switch 3KJ 4-pole, for power distribution - 3KJ0346-4AA20-0AA0

Product Description

Siemens SENTRON Manual On-Load Changeover Switch – 3KJ0346-4AA20-0AA0

The Siemens 3KJ0346-4AA20-0AA0 is a SENTRON / SINOVA 3KJ0 series manual on-load changeover switch designed for safe and reliable power source transfer (I–0–II operation) in low-voltage power distribution systems. It is widely used in industrial switchboards, commercial buildings, and DG backup systems for switching between two independent power sources such as mains–generator or mains–mains supply.

This model belongs to the 3KJ0 Size 3 frame and features a 4-pole configuration (3P + Neutral), ensuring complete isolation and safe switching of all phases and neutral conductors.

It is designed for AC-23A duty, making it suitable for switching motor loads, pumps, HVAC systems, and mixed industrial feeder loads under full load conditions.

Key Features:

• Siemens SENTRON / SINOVA 3KJ0 series changeover switch 

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

• 4-pole (3P + Neutral) configuration 

• Rated current: 630 A 

• AC-23A utilization category for industrial load switching 

• Suitable for mains–generator and mains–mains applications 

• Robust rotary handle mechanism with door interlock option 

• Break-before-make switching for safe source transfer 

• Panel mounting design for LT switchboards 

• IEC 60947-3 compliant