The Siemens SENTRON 3VA1080-2ED42-0BH0 is a 4-pole molded case circuit breaker (MCCB) rated for 80 A continuous current at 40 °C, designed for line protection in distribution panels. It carries a TM210 thermal-magnetic overcurrent release and an integrated undervoltage release (UVR), which means the breaker will trip if control voltage drops — a standard requirement for motor feeder circuits and safety disconnects where you need the load to drop on loss of control power.
Interrupting Capacity and Thermal Derating
This MCCB delivers 52.5 kA interrupting capacity at 240 V, dropping to 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V — so the available fault current at your panel's line voltage determines whether this breaker has enough headroom. The 80 A rating holds steady up to 50 °C; above that it derates to 76.8 A at 55 °C and 72 A at 70 °C. In a warm enclosure or near other heat sources, that derating curve is the real limit, not the nameplate 80 A.
Mounting and Integration
The 3VA1080-2ED42-0BH0 measures 130 mm high, 101.6 mm wide, and 70 mm deep — a standard MCCB footprint for panel-mounting on a DIN rail or direct screw-fix. The IP40 front protection means it's sealed against tools and wires from the front but not against water; keep it inside a rated enclosure for washdown areas. It ships with 2 auxiliary switches plus 1 trip alarm switch (HQ type), so you can wire status feedback to a PLC or indicator lamp without adding external blocks.