What this 50 A MCCB is and where it fits
The Siemens SENTRON 3VA1050-2ED36-0JH0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection — meaning it guards the feeder against overloads and short circuits, not motor or generator duty. Rated 50 A continuous at 40 °C, it holds that same 50 A all the way up to 50 °C and only starts to derate above 55 °C (-), so it handles warm panel environments without a lot of headroom loss. Interrupting capacity runs 52.5 kA at 240 V, 32 kA at 415 V, and 7.5 kA at 690 V — numbers that tell you it's built for high-fault commercial and light industrial distribution boards, not for sitting behind a transformer secondary that's already current-limited.
Ratings that matter for panel fit
At 70 mm deep, 76.2 mm wide, and 130 mm tall, this MCCB fits a 3-pole footprint. Insulation voltage is rated 800 V. Maximum power loss is 14.6 W.
Auxiliary and release options
This variant ships with a shunt trip (STL) release and an auxiliary switch configuration of 2 auxiliary switches plus 1 trip alarm switch HQ. The trip indicator is present, and there is a voltage trigger — meaning the breaker can signal its state and be remotely tripped via the shunt coil. No undervoltage release is fitted, and there is no ground-fault monitoring or communication function. If you need remote open/close feedback and emergency trip, this unit has it; if you need UVR or ground-fault, look at the -2ED36-0JH0 variants with those options.