SENTRON 3VA1150-6EF36-0AE0 — 50 A MCCB for Line Protection
The Siemens 3VA1150-6EF36-0AE0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a 50 A continuous rating across ambient temperatures from 40 °C to 50 °C, derating to 45 A at 70 °C — a thermal curve you need to check against your enclosure's internal temperature rise, especially in a packed panel. Breaking capacity is the headline spec here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 V and 690 V. That 220 kA figure at 240 V gives you serious fault-current headroom for high-capacity transformer secondaries or large motor-control-center feeds. The 17 kA at 690 V still covers most industrial 690 V distribution. It uses a TM240 thermal-magnetic overcurrent release — fixed thermal and magnetic trip settings, no electronic adjustment. That makes it a straightforward choice for standard feeder protection where you don't need the selectivity flexibility of an electronic trip unit. Insulation voltage is rated 800 V, so it's comfortable on 690 V systems.
Panel Fit and Integration
The 3VA1150-6EF36-0AE0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a 3-pole frame that fits standard Siemens SENTRON mounting accessories and busbar systems. The 70 mm depth means it projects less than many competing MCCBs, which helps when you're routing cables behind a backplate. Power loss is 14.6 W maximum at rated current — factor that into your enclosure thermal calculation, particularly if you're grouping several breakers in a sealed cabinet. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Lifecycle and Sourcing
The 3VA1150-6EF36-0AE0 is a current-production SENTRON MCCB.