What this MCCB carries and where it fits
The Siemens SENTRON 3VA2110-5HL36-0JA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current across the full operating temperature range from -25 °C to 70 °C — no derating needed up to that ceiling. It is designed for line protection, meaning the thermal-magnetic trip curve is set to protect cables and busbars from overload and short-circuit, not motor or generator windings. Breaking capacity is the headline number here: 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and still 3.7 kA at 690 V. That 187 kA at 240 V tells you this breaker is sized for high-fault service-entrance or large sub-distribution panels where available fault current is extreme — typical for industrial switchboards close to a utility transformer. The 121 kA at 415 V covers most European 400 V industrial networks without cascading. It carries a shunt trip release (STL) for remote or emergency-off tripping — wire it to a pushbutton or safety relay to drop the breaker on command. No undervoltage release, no ground-fault monitoring, no communication module on this variant. The supplied basic switch is order code 3VA21105HL360AA0.
Panel fit and mounting
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep. That 86 mm depth is the body only — add clearance for the shunt trip wiring and any rear-mounted accessories. Standard screw-mount or DIN-rail adapter (check the specific mounting kit for the 3VA2 frame). The 105 mm width means it occupies three 35 mm module spaces on a DIN rail if using the rail adapter. Rated insulation voltage is 800 V, so it can be used in 690 V line-to-line systems with proper clearance. Power loss is 10 W maximum at rated current — negligible for panel thermal calculations but worth noting if the enclosure is densely packed.