MCCB for high-fault panels — 40 A, 242 kA
The Siemens 3VA2140-6HN36-0AA0 is a 3-pole SENTRON molded case circuit breaker rated 40 A continuous (Iu) with an ETU350 electronic trip unit for line protection. The interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V and 440 V, dropping to 121 kA at 500 V and 3.7 kA at 690 V — this is a high-fault-rated MCCB sized for transformer secondaries, large motor control centers, or main feeders where available fault current is well above standard 25/36 kA breakers.
Current rating holds flat to 70 °C — no derate needed
The 40 A rating is maintained across the full operating range from 40 °C to 70 °C — no temperature derating curve to calculate for standard panel ambient. That simplifies BOM sizing: the breaker delivers its nameplate current even in a warm enclosure near other heat sources.
DIN-rail footprint and panel fit
Mounts on standard DIN rail. Dimensions are 105 mm wide (4.13 in), 181 mm tall (7.13 in), 86 mm deep (3.39 in) — that 86 mm depth includes the handle and terminals, so check gland-plate clearance on shallow enclosures. IP40 on the front face; the body is open to the panel interior for heat dissipation.