Internal accessories for SENTRON, Undervoltage releases-3VM9908-0BB23

Product Description

Siemens Internal Accessories – Undervoltage Release – 3VM9908-0BB23

The Siemens 3VM9908-0BB23 is an undervoltage release (UVR) internal accessory designed for SENTRON 3VM MCCB systems. It is used to ensure safe tripping of the circuit breaker when the supply voltage drops below a defined level, thereby protecting equipment from undervoltage operation, motor damage, and unstable system conditions.

This accessory is commonly installed in LT panels, MCC/PCC panels, and industrial distribution systems, where controlled automatic disconnection during voltage failure or dip conditions is required.

Key Features

• Siemens SENTRON 3VM series internal accessory
• Part Number: 3VM9908-0BB23
• Undervoltage release (UVR) function
• Control supply voltage: 110V AC (50/60 Hz)
• Ensures breaker trips during voltage drop or supply failure
• Protects motors and sensitive equipment from undervoltage damage
• Designed for 3VM MCCB systems up to 630A frame range
• Compact plug-in internal accessory design
• Low power consumption (~2 VA)
• High dielectric strength and insulation performance
• Easy integration inside MCCB auxiliary slot
• Suitable for industrial automation and distribution panels
• Complies with Siemens SENTRON accessory standards