SENTRON 3VA1140-6EF32-0JA0 — 40 A MCCB with shunt trip, line protection
The Siemens 3VA1140-6EF32-0JA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in distribution panels. It carries a 40 A continuous rating at 40 °C ambient, holds that rating through 50 °C, and derates to 37 A at 70 °C — so in a warm enclosure you lose only 3 A off the nameplate. Breaking capacity is 220 kA at 240 V AC, 154 kA at 415 V, and 121 kA at 440 V — numbers that put it in the high-interrupting category for industrial mains distribution. At 500 V and 690 V it still clears 17 kA, which covers most motor-control center fault levels. Three-pole construction with a shunt trip release (STL) and TM240 thermal-magnetic overcurrent release. The shunt trip lets a remote safety relay or emergency-stop circuit open the breaker independently of the overload mechanism — standard for E-stop chains and undervoltage protection schemes.
Panel fit and mounting
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a 3-pole MCCB footprint that fits standard Siemens SENTRON mounting bases and busbar systems. The 70 mm depth leaves clearance behind a 200 mm deep enclosure door without hitting the gland plate. Maximum power loss is 10.8 W per pole at rated current — factor that into enclosure thermal calculations if you're packing multiple breakers in a sealed cabinet.
Environmental and compliance
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The 80 °C storage max means it can sit in a non-climate-controlled warehouse without issue — the operating limit is the one that governs in-panel performance. Rated insulation voltage is 800 V, which covers 690 V line-to-line systems with margin. No undervoltage release, no ground-fault monitoring, no communication function — this is a straight thermal-magnetic breaker with a shunt trip for remote opening.