SENTRON 3VA MCCB, Thermal Magnetic Trip Unit - 3VA1120-3GE42-0AA0

Product Description

Siemens SENTRON 3VA MCCB with Thermal Magnetic Trip Unit – 3VA1120-3GE42-0AA0

The Siemens 3VA1120-3GE42-0AA0 is a Molded Case Circuit Breaker (MCCB) from the SENTRON 3VA1 series, designed to protect low-voltage electrical distribution systems against overload and short-circuit faults. This 4-pole MCCB is equipped with a Thermal Magnetic Trip Unit (TM220 / ATFM type), offering adjustable overload protection and fixed short-circuit protection, making it suitable for industrial and commercial power distribution applications.

It is widely used in LT panels, MCC/PCC systems, feeder protection, and main distribution boards, where reliable fault interruption and selective coordination are required.

Key Features:

• Siemens SENTRON 3VA1 series MCCB 

• Part Number: 3VA1120-3GE42-0AA0 

• 4-pole molded case circuit breaker 

• Thermal Magnetic Trip Unit (TM220 / ATFM type) 

• Rated current: 20A 

• Adjustable overload protection (Ir: typically 14A–20A depending on setting) 

• Fixed short-circuit protection (Ii: approx. 10 × In) 

• High breaking capacity: 25kA at 415V AC 

• IEC Frame Size 160 design 

• Compact industrial-grade construction 

• Reliable protection against overload and short-circuit faults 

• Suitable for selective coordination in LV systems 

• Screw / lug terminal connection (variant dependent) 

• High electrical and mechanical endurance 

• Designed as per IEC 60947-2 standards 

• Maintenance-free operation