32 A, 4-pole MCCB with TM210 release — what the ratings mean for your panel
The Siemens 3VA1132-3GD46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 32 A continuous current with a 4-pole configuration, designed for line protection in industrial distribution panels. The TM210 thermal-magnetic release provides fixed thermal and magnetic trip thresholds — no adjustment dials, which means the breaker's protection curve is locked at the factory for consistent coordination studies. Breaking capacity sits at 75.6 kA at 240 V AC and still delivers 52.5 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. The 800 V rated insulation voltage gives headroom for 690 V line-to-line systems common in wind turbine step-up transformers or heavy industrial motor control centers.
Derating and thermal management — no up-tower surprises
This breaker carries its full 32 A rating from 40 °C up to 50 °C ambient (–). At 55 °C it derates to 31 A, at 65 °C to 30 A, and holds 30 A through 70 °C (–). That derating curve matters when you're packing breakers into a poorly ventilated enclosure or a nacelle cabinet that sees internal temps near 60 °C in summer — you don't lose a full pole's worth of capacity. Power dissipation maxes at 10.6 W, which is modest for a 32 A MCCB; keep that in mind for thermal calculations in sealed stainless steel boxes on offshore platforms.
Physical fit and panel integration
The 3VA1132-3GD46-0AA0 measures 70 mm deep, 101.6 mm wide, and 130 mm tall (–). That 101.6 mm width is exactly 4 inches — standard for a 4-pole MCCB in the SENTRON 3VA frame. It mounts on a DIN rail or can be screw-fixed to a backplate. The IP40 front protection means it's sealed against tools and wires touching live parts from the front, but the sides and back are open for heat dissipation — standard for panel-mounted MCCBs. Verify gland-plate clearance: 70 mm depth leaves room behind a 200 mm deep enclosure door.