Line protection MCCB with TM210 release
The Siemens SENTRON 3VA1080-2ED42-0DH0 is a 4-pole molded case circuit breaker rated for 80 A continuous current (Iu) with a TM210 thermal-magnetic overcurrent release. It is configured as a line protection device — no voltage trigger, no communication function, no phase failure detection — built for straightforward feeder or distribution protection in a panel. Breaking capacity steps down with system voltage: 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V. That 32 kA at 415 V covers most common industrial distribution fault levels without needing a current-limiting upstream device.
Thermal derating and ambient limits
The breaker holds its full 80 A rating up to 50 °C ambient. Above that it derates: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. If the panel runs hot — say a non-climate-controlled enclosure near a furnace line — this derating curve tells you the real available current without nuisance tripping.
Integrated auxiliary releases and switching
This variant ships with an undervoltage release (UVR) fitted, plus 2 auxiliary switches and 1 trip alarm switch (HQ type). The integrated auxiliary trip is order code 3VA9608-0BB25. The UVR drops the breaker if control voltage falls below its dropout threshold — useful for safety circuits or upstream undervoltage protection schemes. Latching endurance is rated at 15,000 cycles, which covers frequent switching in a process line but is not a daily-switching contactor replacement.
Physical fit and panel integration
Dimensions: 70 mm deep, 101.6 mm wide, 130 mm tall. The 101.6 mm width is a standard 4-pole MCCB footprint — it occupies four 25.4 mm (1-inch) module positions on a DIN rail or direct panel mount. Front IP40 protection means it is splash-proof from the front but not sealed for washdown; keep it inside a closed enclosure. The trip indicator is visible through the front cover, so a quick walk-by inspection shows tripped vs. healthy status without opening the panel door.