The Siemens 3VM1140-3ED22-0AA0 is a SENTRON molded case circuit breaker (MCCB) in a 2-pole, 40 A frame, fitted with a TM210 thermal-magnetic trip unit. It's sized for line protection in distribution panels where the interrupting rating needs to match the available fault current — 76 kA at 240 V AC and 53 kA at 415 V AC. That SCCR headroom means it can sit on a high-fault bus without cascading upstream, which simplifies coordination studies on retrofit jobs. Rated operational voltage is 415 V AC, with a maximum DC rating of 250 V. The insulation voltage (Ui) is 500 V, so it's comfortable on 480 V systems as long as the line-to-line voltage stays under that ceiling. The front face carries IP40 protection — fine for a clean indoor panel, but not for washdown areas. Current rating holds flat at 40 A from 40 °C up to 50 °C, then derates to 39 A at 55 °C and 60 °C, and 38 A at 65 °C, with 37 A at 70 °C. That's a shallow derate curve — useful if the breaker lives near other heat sources in a crowded enclosure.
Dimensions & Panel Fit
The 3VM1140-3ED22-0AA0 measures 70 mm deep, 50.8 mm wide, and 130 mm tall. That 50.8 mm (2 in) width is a standard 2-pole MCCB footprint — it drops into a panel cutout sized for that pitch without modification. Depth of 70 mm leaves room for rear bus connections in a typical 200 mm deep enclosure.
Trip Unit & Protection
The TM210 thermal-magnetic trip provides fixed thermal and magnetic settings — no adjustable long-time or short-time pickup. The magnetic instantaneous pickup is set at 400 A (10× In). There's no undervoltage release, no shunt trip, no ground-fault monitoring, and no communication module on this variant. It's a straight line-protection breaker for simple distribution.