Siemens SENTRON 3VA1132-4GD42-0AA0 — 32 A 4-Pole MCCB with TM210 Release
The Siemens 3VA1132-4GD42-0AA0 is a SENTRON-series molded case circuit breaker (MCCB) rated for line-protection duty, carrying a continuous current of 32 A across all four poles. Its TM210 thermal-magnetic overcurrent release provides fixed thermal and magnetic trip settings — no interchangeable trip units, which simplifies specification for a fixed-load panel. The 4-pole configuration suits three-phase systems with a fully switched neutral, common in North American and IEC distribution boards where neutral isolation is required. Breaking capacity is the headline selection parameter here: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a 32 A frame, these figures place it in the high-interrupting category — it can clear a fault on a large transformer secondary or a high-capacity bus without upstream coordination issues. The 121 kA at 240 V is particularly relevant for 120/240 V split-phase services in commercial buildings where available fault current can exceed 100 kA near the service entrance. Thermal derating is minimal up to 50 °C (full 32 A), then drops to 31 A at 55–60 °C and 30 A at 65–70 °C. This flat curve means the breaker can be packed into a warm enclosure without significant de-rating — useful for high-density panel layouts. Rated insulation voltage is 800 V, and maximum power loss is 10.6 W, which factors into enclosure heat-load calculations.
Integration and Mounting
Dimensions are 70 mm depth, 101.6 mm width, 130 mm height — a compact 4-pole footprint that fits standard Siemens 3VA mounting accessories. Front-face protection class is IP40, suitable for enclosed panel mounting where no water ingress is expected. The TM210 release is factory-set and non-interchangeable, so verify the 32 A rating matches the downstream load before panel assembly; no field calibration is possible.