What this MCCB carries
The Siemens SENTRON 3VA1180-5EF32-0DH0 is a 3-pole molded case circuit breaker (MCCB) rated 80 A continuous at 40 °C, with a breaking capacity of 187 kA at 240 VAC — that's the short-circuit current it can safely interrupt without welding contacts or rupturing the case. At 415 V the rating drops to 121 kA, at 440 V to 75.6 kA, and at 500/690 V to 17 kA, so the voltage you're protecting against determines the fault level this breaker can handle. The insulation voltage is rated 800 V, which covers most 480/600 V distribution panels with margin.
Built-in auxiliaries and releases
This MCCB ships with an undervoltage release (UVR) and a complement of 2 auxiliary switches plus 1 trip alarm switch (HQ). The UVR trips the breaker when control voltage drops below a threshold — common on emergency-stop circuits or when a safety relay loses power. The auxiliary switches give remote status (open/closed/tripped) back to a PLC or annunciator panel. No communication function is built in, so if you need remote trip or energy monitoring, you'll add an external module.
Thermal derating and power loss
The 80 A rating holds steady from 40 °C up to 50 °C. Above that it derates: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. If your panel ambient runs hot, you'll need to account for that — the breaker won't carry full load without nuisance tripping. Maximum power loss is 21.7 W, which is modest for an 80 A frame; it won't cook adjacent components in a well-ventilated enclosure.
Physical fit and panel integration
Dimensions: 130 mm high, 76.2 mm wide, 70 mm deep. That's a standard 3-pole MCCB footprint for a 160 A frame (the 3VA1 series). It mounts on a DIN rail or directly to a backplate via the screw terminals. The 70 mm depth means it clears most shallow enclosures — check your gland-plate clearance if you're retrofitting into a tight cabinet.