The Siemens SENTRON 3VA1050-4ED36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 50 A continuous current at 40 °C, with a TM210 thermal-magnetic release that is non-adjustable for the I²t trip characteristic. It is configured as a line protection device — meaning it is intended for cable and busbar protection in distribution panels, not motor branch circuits where adjustable overloads are needed. Breaking capacity is the headline decision point here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA at 240 V is a high-interrupting rating — the breaker can safely clear a fault current up to that level without welding contacts or cascading failure upstream, which matters when you are feeding a panel from a transformer with high available fault current. Thermal derating is published: the breaker holds 50 A from 40 °C through 50 °C, then drops to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. If your enclosure runs hot — say a packed panel near a furnace line — plan for that 45 A ceiling at 70 °C, not the 50 A nameplate.
Physical Fit and Panel Integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 3-pole width of 76.2 mm (3 inches) is the standard MCCB footprint for this current class. Front protection is IP40 — suitable for general indoor panel use where tools or fingers cannot reach live parts. No IP rating on the sides or rear; the breaker relies on the enclosure for overall panel seal. No undervoltage release, no communication module, no ground-fault monitoring version fitted — this is a plain thermal-magnetic breaker. If you need remote trip indication or shunt trip, you add the accessory later; the 3VA platform supports plug-in auxiliaries.
Delta: How It Sits Against a Sibling
Compared to the 3VA1110-5MH36-0AA0 — which is also a 3-pole SENTRON but with an electronic release (ETU) and higher current rating — the 3VA1050-4ED36-0AA0 uses a fixed TM210 thermal-magnetic release. The TM210 is simpler, cheaper, and non-adjustable; the ETU version offers adjustable I²t curves and ground-fault options. If your panel already has a 3VA1110 cutout, the 76.2 mm width is identical, so the 3VA1050 drops into the same mounting footprint without rewiring the busbars.