What this MCCB is and what it does
The Siemens 3VA2010-7HN36-0AK0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous rated current of 100 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel sizing in warm enclosures. The 100 A rating is the same at every point from 40 °C through 70 °C, so a panel builder can populate this breaker at the top of a warm cabinet without recalculating thermal limits. Breaking capacity hits 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V — the 240 V figure is the headline for high-fault residential or light commercial services; the 415 V/440 V numbers cover the common European low-voltage distribution level.
Physical fit and panel integration
Dimensions are 86 mm deep, 105 mm wide, 181 mm high — a standard 3-pole MCCB footprint that drops into most SENTRON or third-party distribution boards without enclosure modification. The 105 mm width is the critical dimension for multi-pole spacing on the DIN rail or busbar stack. Rated insulation voltage is 800 V, so it's comfortable on 690 V line-to-line systems with margin. Power loss at full load is 7.7 W maximum — negligible for thermal budgeting in a ventilated panel, but worth noting if the breaker is sealed in a non-ventilated enclosure with other heat sources.
Auxiliary switch complement and monitoring
This variant ships with one auxiliary switch, one trip alarm switch, and one electrical alarm switch HQ — enough to signal the breaker state (open/closed), a trip event, and a separate electrical alarm back to a PLC or annunciator panel without adding external relays. A trip indicator is present on the front face, giving a local visual confirmation that the breaker opened on fault rather than being manually switched off.
Lifecycle and sourcing reality
The lifecycle stage is marked as current — meaning Siemens still actively manufactures and supports this order code. No last-time-buy notice, no successor part number has been issued.