What this 3VA1050-4ED32-0HH0 is and what it does
The Siemens SENTRON 3VA1050-4ED32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 50 A across the ambient range up to 50 °C before derating begins — at 55 °C it's 48 A, at 70 °C it's 45 A, so the full 50 A holds in most ventilated enclosures. Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — that 121 kA figure at 240 V covers high-fault utility feeds common in North American panelboards, while the 75.6 kA at 415 V handles European industrial distribution. It ships with a TM210 thermal-magnetic overcurrent release and a shunt trip (STL) auxiliary release; the auxiliary contact block is a 2-auxiliary-switch plus 1-trip-alarm-switch HQ configuration, and the integrated auxiliary trip order code is 3VA9688-0BL30.
Sizing and selectivity — what the ratings mean for your panel
The 50 A frame with a 121 kA interrupting rating at 240 V means this breaker can be applied upstream of downstream devices with lower SCCR, provided the let-through energy is coordinated — the TM210 release gives a fixed thermal curve and magnetic pickup, so selectivity tables from the SENTRON manual apply. Rated insulation voltage Ui is 800 V, and the breaker carries an IP40 rating on the front — suitable for enclosure interiors where tools or fingers might contact the front face but not for washdown zones. No undervoltage release, no communication module, no phase-failure detection, and no ground-fault monitoring are fitted — this is a straight thermal-magnetic line-protection breaker with a shunt trip for remote opening; if you need undervoltage or ground-fault, this isn't the variant.
Physical fit and panel integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — that 76.2 mm width is a standard 3-pole MCCB footprint on a DIN rail or panel-mount adapter, so it drops into the same cutout as other SENTRON 3VA frames. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Latching endurance is 15,000 operations. The trip indicator and voltage trigger are present — the voltage trigger is the shunt trip itself, so remote tripping via a control signal is built in.