What this MCCB delivers on the line
The Siemens 3VA1032-4ED36-0CA0 is a SENTRON molded case circuit breaker (MCCB) rated for 32 A continuous at 40 °C, 3-pole, designed for line protection in distribution panels and motor control centers. Breaking capacity hits 121 kA at 240 V AC and holds 75.6 kA at 415 V — enough headroom to clear high-fault conditions without cascading upstream breakers. The TM210 thermal-magnetic trip unit handles overload and short-circuit protection in one package; no separate relay needed. This unit includes an undervoltage release (UVR) — the auxiliary release type is clearly marked as undervoltage release. That means if the control voltage drops, the breaker trips immediately. Useful for safety circuits where loss of control power must kill the load. At 70 mm deep × 76.2 mm wide × 130 mm tall, it fits standard SENTRON mounting footprints. No communication module onboard — this is a straight hardwired breaker.
Thermal derating — what the curve tells you
Rated current holds at 32 A from 40 °C through 50 °C. At 55 °C it derates to 31 A, and at 65 °C to 30 A. At 70 °C ambient — the maximum operating temperature — it still carries 30 A. That's a shallow derating slope, meaning the breaker doesn't lose much capacity in warm enclosures. Insulation voltage is rated 800 V, so it's comfortable on 690 V systems.
Breaking capacity by voltage — selectivity planning
At 240 V: 121 kA. At 415 V: 75.6 kA. At 440 V: 52.5 kA. At 500 V and 690 V: 11.9 kA. That steep drop above 440 V means on a 690 V system you need to verify the available fault current is under 12 kA, or coordinate with a current-limiting upstream device. Power loss is 13.1 W maximum — negligible for thermal budgeting in a populated panel.