The Siemens SENTRON 3VA1032-3ED32-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for 32 A continuous current (Iu) with a TM210 thermal-magnetic overcurrent release. It's configured for line protection — no undervoltage release, no ground-fault module, no communication — so it's a straight thermal-magnetic breaker for branch-circuit or feeder protection in a 400 V class panel. The TM210 release is fixed-trip, not adjustable, which simplifies coordination: what you see is what you get. Breaking capacity runs 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. At 415 V — the most common industrial distribution voltage — that 52.5 kA puts it well into high-fault-duty territory, suitable for main or sub-main positions where the available fault current is stiff. The 690 V figure is lower but still useful for 690 V line-to-line systems in mining or heavy industrial.
Temperature derating and ambient limits
The 32 A rating holds up to 50 °C ambient without derating. At 55 °C it steps to 30.72 A, at 60 °C to 30.08 A, at 65 °C to 29.44 A, and at 70 °C to 28.8 A. That's a gentle slope — about 0.1 A per °C above 50 °C — so it still carries nearly 29 A at the maximum 70 °C operating ambient. Storage range is -40 °C to 80 °C, which exceeds the operating range; that limit is for handling, not running.
Auxiliary contacts and trip indication
The breaker ships with one auxiliary switch and one trip alarm switch (HQ version). The trip alarm is mechanically linked to the fault-trip mechanism — it changes state only on an overcurrent or short-circuit trip, not on manual open. That gives the control system a hard-wired fault signal without needing a separate undervoltage release or shunt trip. The auxiliary switch tracks the main contact position for status feedback.