SENTRON 3VA1150-6EF32-0CC0 — 50 A MCCB with Undervoltage Release
The Siemens SENTRON 3VA1150-6EF32-0CC0 is a 3-pole molded case circuit breaker rated for 50 A continuous current (Iu) with a TM240 thermal-magnetic overcurrent release. It carries a 220 kA breaking capacity at 240 V, 154 kA at 415 V, and 121 kA at 440 V — enough for high-fault panel main or feeder duty in industrial distribution. The built-in undervoltage release (UVR) trips the breaker when control voltage drops, protecting downstream loads from brownout conditions. Front protection is IP40, so this mounts in a panel enclosure — not exposed to washdown. The 130 mm height, 76.2 mm width, and 70 mm depth fit standard SENTRON 3VA panel cutouts and busbar systems. Two HQ auxiliary switches (form C) are integrated for status feedback to a PLC or indication lamp.
Breaking Capacity and Selectivity
This breaker's short-circuit ratings are specified at four voltage levels: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V. For a 480 V panel fed from a transformer with 65 kA available fault current, the 415 V rating (154 kA) gives ample headroom for full selectivity downstream. The 690 V rating (17 kA) is lower — verify coordination if this breaker is used on a 600 V delta system. The TM240 release is thermal-magnetic — fixed thermal pickup at 50 A, magnetic trip factory-set. No electronic adjustments or communication functions on this variant. The 50 A rating holds at ambient up to 50 °C; above that, derate to 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. In a warm panel (55 °C internal), plan for 48 A continuous load max.
Lifecycle and Sourcing
The 3VA1150-6EF32-0CC0 is a current product. Pricing and availability are confirmed at quote time against an RFQ. No direct second-source exists; the closest functional peer is the 3VA1112-5EF32-0CA0, but verify coordination before substituting.
Panel Integration
The 76.2 mm width (3-pole) matches standard SENTRON busbar and DIN-rail adapter spacing. Depth of 70 mm leaves clearance for rear-connected busbars. The undervoltage release coil is wired separately — confirm control voltage matches the UVR rating.