SENTRON 3VA1080-3ED42-0JH0 — 80 A MCCB with TM210 release and shunt trip
The Siemens SENTRON 3VA1080-3ED42-0JH0 is a 4-pole molded case circuit breaker (MCCB) rated for 80 A continuous current (Iu), designed for line protection in distribution panels and motor control centers. Its TM210 thermal-magnetic overcurrent release provides fixed thermal and magnetic trip settings, so no adjustment dials to worry about during commissioning — set it and forget it. The integrated shunt trip (STL) allows remote tripping via a control signal, useful for emergency-stop or supervisory shutdown circuits.
Breaking capacity and thermal derating — what the ratings mean for panel fit
Breaking capacity varies sharply with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. That 75.6 kA at 240 V means this breaker can safely interrupt a fault up to that level without welding contacts or cascading upstream — critical for high-fault panels near large transformers. At 690 V the 7.5 kA figure limits its use to lower-fault installations; verify the available fault current at the point of application. Thermal derating is minimal up to 50 °C — the breaker carries the full 80 A at 40, 45, and 50 °C. Above that it steps down: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. In a hot panel near drives or transformers, that 72 A at 70 °C is the real-world limit, not the nameplate 80 A. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Physical integration and auxiliary wiring
Dimensions: 130 mm height, 101.6 mm width, 70 mm depth. The 70 mm depth is shallow enough for most 200 mm-deep enclosures without crowding the door clearance. IP40 on the front means protection against tools and wires >1 mm — fine for a dry indoor panel, but not for washdown areas. The auxiliary contact block is factory-configured as 2 auxiliary switches plus 1 trip alarm switch (HQ), giving three separate signal paths for status feedback to a PLC or annunciator.