The Siemens 3VA1150-6EF36-0AG0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in distribution panels. It carries 50 A continuous at 40 °C ambient (derates to 45 A at 70 °C) across three poles, with a TM240 thermal-magnetic trip unit that handles overloads and short-circuits without external control power.
Breaking capacity and selectivity headroom
Rated short-circuit breaking capacity hits 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — figures that let this MCCB serve as the main breaker in high-fault panels without cascading upstream. At 500 V and 690 V the rating settles to 17 kA, still adequate for most motor-control center infeeds. The 800 V rated insulation voltage means the internal clearance and creepage are sized for 690 V line-to-line systems.
Panel fit and wiring
Width 76.2 mm (3 in) and depth 70 mm — fits standard 3-pole MCCB mounting footprints in SENTRON and third-party enclosures. The supplied basic switch carries order code 3VA11506EF360AA0, and the auxiliary switch block includes one auxiliary contact plus one trip-alarm contact. No undervoltage release or shunt trip is built in; those are add-on accessories if needed.
Thermal management
Maximum power loss is 14.6 W — negligible for most enclosures, but worth factoring into a sealed stainless-steel panel with multiple breakers ganged together. Operating range spans -25 °C to 70 °C; storage range -40 °C to 80 °C. The trip indicator gives a visual flag on the breaker face after a fault, speeding panel walk-downs.