What this MCCB delivers for a panel build
The Siemens SENTRON 3VA2010-5HN32-0DL0 is a 3-pole molded case circuit breaker rated for 100 A continuous current with no derating across the full 40 °C to 70 °C operating range — meaning you can load it to nameplate in a warm enclosure without bumping the frame size. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds or transformer secondaries without cascading upstream. At 690 V the rating drops to 3 kA — that voltage is the limit, not the sweet spot. The breaker ships with an undervoltage release (UVR) and a complement of auxiliary switches: 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch HQ. That gives the panel builder direct status feedback without adding external relays. Designed for line protection, this MCCB has a trip indicator and no communication function — it is a standalone overcurrent protector, not a smart breaker. The supplied basic switch is order code 3VA20105HN320AA0.
Footprint and mounting fit
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA frame that drops into existing DIN-rail or panel-mount layouts without re-drilling. Verify the 86 mm depth leaves clearance for the handle swing and cable bend radius inside the enclosure. Power loss is 16 W maximum at rated load — negligible for thermal budgeting in a ventilated panel, but worth noting if the breaker shares a sealed compartment with temperature-sensitive electronics.