SENTRON 3VA2140-8KP36-0AA0 — 40 A MCCB with ETU850 Trip Unit
The Siemens SENTRON 3VA2140-8KP36-0AA0 is a 3-pole molded case circuit breaker rated for 40 A continuous current, with an adjustable overcurrent release range from 60 A minimum to 480 A maximum — meaning the trip threshold can be dialed in across a wide band to match the actual load, not just the frame rating. It carries the ETU850 electronic trip unit, which provides adjustable long-time, short-time, instantaneous, and ground-fault protection curves — a step up from thermal-magnetic breakers for selectivity coordination in distribution panels. Breaking capacity is rated at 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — figures that cover most industrial service-entrance and sub-distribution fault levels without cascading upstream. The breaker includes a communication function onboard, enabling integration with higher-level monitoring or control systems — useful for remote trip indication and load management in automated lines.
Mounting and Panel Fit
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — the standard SENTRON 3VA2 frame footprint, so it retrofits into existing 3VA2 panel cutouts and bus-bar arrangements without re-drilling. Front-face protection is IP40, suitable for enclosed panel mounting where the breaker is not directly exposed to washdown or dust ingress. Operating temperature range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C — adequate for unconditioned electrical rooms and most industrial enclosures.