What the ratings mean for fit
The Siemens SENTRON 3VA1080-3ED42-0AH0 is a 4-pole molded case circuit breaker (MCCB) rated for 80 A continuous current at 40 °C, with a TM210 thermal-magnetic release. The TM210 designation means the thermal element is fixed at 80 A and the magnetic short-circuit pickup is 10× In (800 A), a standard ratio for line protection in motor branch circuits and distribution panels. The 75.6 kA interrupting rating at 240 V AC drops to 52.5 kA at 415 V and 32 kA at 440 V — the 415 V figure is the one to check if your panel feeds a 400 V class system, since that's the voltage most common in European industrial distribution. At 690 V the rating falls to 7.5 kA, so this breaker is not the right choice for a 690 V main; it belongs in a 400 V or 480 V lineup. Thermal derating is gradual: the breaker holds 80 A from 40 °C up through 50 °C, then drops to 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. If your panel ambient runs above 50 °C — say, a sealed enclosure near a furnace line — you need to size up one frame or accept the derated current. The operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. The 70 mm depth, 101.6 mm width, and 130 mm height place it in the standard 4-pole MCCB footprint for the 3VA frame. It mounts on a DIN rail or direct-panel with the supplied hardware. IP40 on the front means it's protected against tools and small wires entering the front face, but the terminals themselves are not sealed — install it inside a panel with a door, not in a washdown zone.
Auxiliary contacts and trip indication
This variant ships with 2 auxiliary switches plus 1 trip alarm switch (HQ configuration). The trip alarm switch changes state only when the breaker trips on fault, not on manual open — useful for remote fault annunciation on a PLC digital input. The auxiliary switches follow the main contact position and can be wired for status feedback to a control system or to interlock a contactor coil. No undervoltage release, no shunt trip, no ground-fault module are included; those are separate add-on accessories that clip onto the left side of the breaker.