SENTRON 3VM, Thermal Magnetic Trip Unit - 3VM1440-5MH32-0AA0

Product Description

Siemens SENTRON 3VM MCCB with Thermal Magnetic Trip Unit – 3VM1440-5MH32-0AA0

The Siemens 3VM1440-5MH32-0AA0 is a high-capacity Molded Case Circuit Breaker (MCCB) from the SENTRON 3VM1 series, designed for reliable protection of low-voltage electrical distribution systems against overload and short-circuit faults. This 3-pole MCCB is equipped with a Thermal Magnetic Trip Unit (TM120M / AM type), optimized especially for motor starter protection and feeder applications where adjustable short-circuit protection is required.

It is widely used in LT panels, MCC/PCC systems, industrial feeders, and motor control circuits, offering strong breaking capacity and dependable system protection in heavy-duty electrical networks.

Key Features:

• Siemens SENTRON 3VM1 series MCCB 

• Part Number: 3VM1440-5MH32-0AA0 

• 3-pole molded case circuit breaker 

• Thermal Magnetic Trip Unit (TM120M / AM type) 

• Rated current: 400A 

• Adjustable short-circuit protection (Ii: approx. 8–16 × In) 

• Motor starter protection (without overload protection) 

• High breaking capacity: 55kA at 415V AC 

• IEC Frame Size 630 design 

• Robust industrial-grade construction for heavy electrical systems 

• Suitable for selective coordination in distribution networks 

• High reliability for short-circuit interruption 

• Screw / lug terminal connection (variant dependent) 

• Long mechanical and electrical endurance 

• Designed as per IEC 60947-2 standards 

• Maintenance-free operation