SENTRON 3VM, Thermal Magnetic Trip Unit - 3VM1220-5MH32-0AA0

Product Description

Siemens SENTRON 3VM MCCB with Thermal Magnetic Trip Unit – 3VM1220-5MH32-0AA0

The Siemens 3VM1220-5MH32-0AA0 is a high-performance 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 comes with a Thermal Magnetic Trip Unit (TM120M / AM type), optimized for motor starter and feeder protection applications where controlled short-circuit protection and high breaking capacity are required.

It is widely used in LT panels, MCC/PCC systems, motor control centers, and industrial feeder circuits, offering strong fault interruption and dependable operational safety.

Key Features:

• Siemens SENTRON 3VM1 series MCCB 

• Part Number: 3VM1220-5MH32-0AA0 

• 3-pole molded case circuit breaker 

• Thermal Magnetic Trip Unit (TM120M / AM) 

• Rated current: 200A 

• Adjustable short-circuit protection (Ii: approx. 6–14 × In) 

• Without overload protection (starter protection version) 

• High breaking capacity: 55kA at 415V AC 

• IEC Frame Size 250 design 

• Suitable for motor starter and feeder protection applications 

• Robust industrial-grade construction 

• High short-circuit withstand capability 

• Screw / lug terminal connection (variant dependent) 

• Mechanical life up to ~20,000 operations 

• Electrical endurance up to ~8,000 operations (AC-1) 

• Designed as per IEC 60947-2 standards 

• Maintenance-free operation