Siemens 3VA1050-4ED32-0CA0 — SENTRON MCCB, 50 A, Line Protection with Undervoltage Release
The Siemens SENTRON 3VA1050-4ED32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection duty, carrying a continuous current Iu of 50 A at 40 °C. It is fitted with a TM210 thermal-magnetic overcurrent release and an integrated undervoltage release (UVR) — the UVR trips the breaker when supply voltage drops below a set threshold, a common requirement for motor feeder circuits where automatic disconnection on loss of control voltage is needed. Breaking capacity is specified across four voltage levels: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. These figures cover the fault-current range for most industrial distribution panels; the 121 kA at 240 V is particularly relevant for high-fault installations in North American 240/120 V split-phase or 240 V three-phase services. Rated insulation voltage is 800 V, giving headroom for 690 V systems. The front face carries IP40 protection — suitable for enclosed panel mounting where dust ingress is limited but not sealed against hose-down.
Sourcing and Lifecycle — Active Production, Quoted to Order
For a BOM line that requires a 50 A 3-pole MCCB with UVR and line-protection characteristics, this order code is a direct fit. No alternate or successor part is listed; the part is the current production variant.
Panel Integration and Mounting
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard SENTRON 3VA footprint that fits DIN-rail or screw-mount panel layouts. The 70 mm depth allows clearance in shallow enclosures where deeper MCCBs would conflict with gland plates or backplane wiring. No auxiliary contact is fitted as standard; the UVR is the only integrated release. If remote status signaling is needed, the auxiliary contact kit (order code 3VA9608-0BB24) can be added in the field.