Manual On Load Changeover Switch 3KJ 4-pole, for power distribution - 3KJ0348-4AA20-0AA0

Product Description

Siemens SENTRON Manual On-Load Changeover Switch – 3KJ0348-4AA20-0AA0

The Siemens 3KJ0348-4AA20-0AA0 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 used in industrial plants, commercial buildings, and heavy-duty DG backup systems to switch between two power sources such as mains–generator or dual incomer mains supply.

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

It is designed for AC-23A duty, making it suitable for switching heavy inductive loads such as motors, compressors, HVAC systems, and industrial feeder networks under full load conditions.

With a rated current of 800A, it is one of the higher-capacity manual changeover switches in the 3KJ0 series, used in large industrial LT panels and power distribution systems. 

Key Features:

• Siemens SENTRON / SINOVA 3KJ0 series changeover switch 

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

• 4-pole (3P + Neutral) configuration 

• Rated current: 800A 

• 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 

• Open execution design for panel installation 

• IEC 60947-3 compliant