What the ratings mean for fit
The Siemens SENTRON 3VA2110-5HN36-0DC0 is a 3-pole molded case circuit breaker (MCCB) in the 3VA2 frame, rated for line protection. Its 100 A continuous current (Iu) holds through 50 °C ambient; above that it derates to 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C — so if the panel runs hot, size the breaker for the actual load at your ambient, not the nameplate 100 A. The interrupting ratings climb with voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V. That 187 kA figure at 240 V is the headline — it handles high-fault utility feeds without cascading upstream, provided the available fault current at the panel doesn't exceed that level. The ETU350 electronic trip unit gives adjustable overload and short-circuit protection curves, plus an integrated undervoltage release (UVR) that drops the breaker when control voltage is lost — useful for safety circuits or emergency-stop chains that need a hard shunt trip on power loss. Rated insulation voltage is 800 V, so it's comfortable on 480/277 V and 600 V industrial systems. It ships with two HQ auxiliary switches (form C) for status feedback to a PLC or annunciator panel.
Mounting and integration
The 3VA2110-5HN36-0DC0 measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that drops into SENTRON panelboards or standalone DIN-rail adapters. The 86 mm depth means it clears most shallow enclosures; verify the back-panel clearance if you're retrofitting into a tight bucket. The auxiliary trip coil (3VA9608-0BB25) is factory-installed; no field wiring of a separate shunt trip module needed. The undervoltage release is wired to a control circuit — it holds the breaker closed as long as voltage is present, and trips on dropout below the release threshold.
Lifecycle and sourcing
The 3VA2 frame is the successor to the older 3VL series, with a slimmer profile and the ETU electronic trip family. If you're replacing a 3VL breaker in an existing panel, check the mounting footprint and bus-bar spacing — the 3VA2 uses the same 105 mm width but the depth and terminal layout differ.