What this MCCB carries and where it fits
The Siemens SENTRON 3VA2110-5HN36-0BL0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at 40 °C through 70 °C — no derating needed across that band, which simplifies panel design in warm cabinets. Its interrupting capacity hits 187 kA at 240 V AC and still holds 121 kA at 415 V and 440 V, so it handles high-fault utility feeds or transformer secondaries without cascading upstream. The breaker is configured for line protection (not motor or generator duty), and the factory-fit undervoltage release (UVR) plus the auxiliary switch set — two auxiliary switches, one trip alarm, one electrical alarm — mean it arrives ready for remote status and safety undervoltage tripping right out of the box.
Panel footprint and integration
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard MCCB footprint that fits most 3-pole breaker slots in distribution panels. The 3VA2 frame accepts plug-in or fixed mounting; the supplied basic switch (order code 3VA21105HN360AA0) is the interrupting module, so replacement swaps stay quick. Spring-cage terminals on the line and load side accept copper conductors up to the breaker's rated ampacity. No communication function onboard — this is a standalone thermal-magnetic trip unit, not a networked power breaker.
Breaking capacity selectivity — a real-world read
The 187 kA at 240 V is the headline number, but the more useful figure for 400 V-class panels is 121 kA at 415 V and 440 V — that's the fault level you'll see on a transformer secondary in most industrial installations. At 500 V it drops to 75.6 kA, and at 690 V it falls to 3.7 kA, so this breaker is not suited for 690 V high-fault applications. For a 400 V distribution board with a 100 A feeder, the 121 kA SCCR gives solid selectivity headroom against downstream 18 kA or 25 kA MCBs.
What's in the box — auxiliary and release configuration
Factory-fitted auxiliary switch complement: two auxiliary switches (signal open/closed), one trip alarm switch (flags a fault trip), and one electrical alarm switch HQ (high-qualified, typically used for remote annunciation). The undervoltage release (UVR) is also pre-installed — no field assembly required. Trip indicator is present (mechanical flag visible on the front face). No ground-fault monitoring version, no voltage trigger, no other measurement function. Power loss at full rated current is 12.5 W maximum — negligible for panel thermal budgeting.