What this MCCB carries
The Siemens 3VA1140-5EF36-0DH0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in three-phase distribution. It holds 40 A continuous at 40 °C through 50 °C without derating, then steps down to 39 A at 55 °C and 60 °C, 38 A at 65 °C, and 37 A at 70 °C — so the 40 A frame stays usable across a typical 50 °C panel ambient without bumping frame size. Interrupting capacity is the headline: 187 kA at 240 VAC, 121 kA at 415 VAC, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That 187 kA at 240 V means it clears high-fault conditions at the service entrance or downstream of a large transformer without cascading upstream breakers — a selectivity play for high-available-fault panels. Rated insulation voltage is 800 V.
Integration and auxiliary fit
Three-pole construction with a built-in undervoltage release (UVR) — the UVR trips the breaker when control voltage drops below threshold, standard for motor feeder circuits that need undervoltage protection per code. The auxiliary switch complement is 2 auxiliary switches plus 1 trip alarm switch HQ, enough for remote status indication on two separate circuits plus a dedicated alarm path on fault. No ground-fault monitoring module is fitted; this is a straight line-protection MCCB. No communication function — it's a hard-wired breaker, not a metering or IoT device. Dimensions: 70 mm deep, 76.2 mm wide, 130 mm tall (–) — standard 3-pole MCCB footprint for DIN-rail or panel-mount backplate integration. Power loss at rated current is 13.3 W maximum, relevant for thermal coordination inside a sealed enclosure.
Environmental and compliance range
Operating temperature spans -25 °C to 70 °C (–); storage range is -40 °C to 80 °C (–). The storage minimum matters for cold warehouse or unheated site storage before commissioning — the breaker can sit at -40 °C without damage, though it must be at operating temperature before being loaded. Compliance documentation (RoHS, REACH, UL, IEC) is standard for the SENTRON series; the 800 V rated insulation voltage aligns with IEC 60947-2 for industrial MCCBs.