What it is and what it does
The Siemens SENTRON 3VA1010-3ED32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, with a TM210 thermal-magnetic overcurrent release. It's built for line protection in distribution panels, switchgear, and motor control centers — the kind of main or feeder breaker that sits between the transformer and the downstream branch circuits. Breaking capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V — so it handles high-fault utility feeds at common North American and European voltages. The 800 V rated insulation voltage (Ui) means the internal clearances are sized for 690 V line-to-line systems without derating. Current rating holds at 100 A up to 50 °C ambient, then derates to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. If the panel runs hot — say, a packed enclosure near a furnace line — that derating curve tells you exactly where the breaker starts to give up headroom.
Dimensions and panel fit
The 3VA1010-3ED32-0BH0 measures 130 mm high, 76.2 mm wide, and 70 mm deep. That 76.2 mm width is a standard 3-pole MCCB footprint — three 25.4 mm pole spacings — so it drops into existing SENTRON or comparable panel-mount busbar systems without re-drilling the gland plate. Front-face protection is IP40, meaning tools or fingers won't accidentally contact live terminals through the cover, but the breaker is not sealed against washdown — keep it inside the enclosure, not on the machine frame.
Auxiliary contacts and undervoltage release
This version comes with 2 auxiliary switches plus 1 trip alarm switch (HQ configuration), and an integrated undervoltage release (UVR). The UVR trips the breaker when control voltage drops below a set threshold — useful for safety circuits or remote shunt-trip applications where you want the breaker to open on loss of control power. The integrated auxiliary trip order code is 3VA9608-0BB11 — that's the factory-fitted internal accessory, not a field-add-on. If you need communication or ground-fault monitoring, this variant doesn't carry them; those are separate order codes in the 3VA family.