Switch Disconnector: 3KA8 for power distribution - 3KA8321-5UE00

Product Description

Siemens Switch Disconnector – 3KA8 Series – 3KA8321-5UE00

The Siemens 3KA8321-5UE00 is a SENTRON 3KA8 switch disconnector (isolator) designed for safe manual isolation and switching of low-voltage power distribution systems. It is widely used in industrial switchboards, MCC panels, and main distribution boards where secure disconnection and maintenance safety are required.

This model belongs to the 3KA8 series (250A class) and is designed for 3-pole + neutral (3PN) applications, making it suitable as a main incomer or feeder isolator in three-phase electrical systems. It ensures complete electrical isolation without providing overload or short-circuit protection, which must be handled by upstream protective devices such as MCCBs or fuses.

The device is suitable for AC-23A duty switching, offering high mechanical durability, reliable operation under load conditions, and long service life in demanding industrial environments.

Key Features:

• Siemens SENTRON 3KA8 switch disconnector 

• Manual isolation for power distribution systems 

• 3PN configuration (3-pole + neutral) 

• Rated current: 250A 

• Suitable for systems up to 690V AC 

• High mechanical and electrical endurance 

• Clear ON/OFF position indication 

• Suitable for AC-23A load switching duty 

• Compact panel mounting design 

• No protection function (isolator only) 

• IEC 60947-3 compliant