MCCB for high-fault substations and feeder protection
The Siemens SENTRON 3VA2110-6HN36-0DA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current across the entire 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Its interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V, which puts it in the class for main feeder protection in high-fault substations or industrial switchboards where SCCR headroom is tight. The 800 V rated insulation voltage suits it for 690 V line-to-line systems, though at 690 V the breaking capacity drops to 3.7 kA — that's the limit to watch if you're using it on a 690 V bus. This is a line-protection design (no ground-fault monitoring, no communication module), fitted with an undervoltage release (UVR) as standard. The UVR trips the breaker when control voltage drops below a threshold — common in emergency-stop chains or loss-of-voltage protection schemes. No trip indicator on the front means fault diagnosis relies on the external UVR status or downstream annunciation.
Panel fit and mechanical integration
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard SENTRON 3VA2 frame footprint. It mounts on a DIN rail or directly to a backplate via the integrated fixing lugs. The 86 mm depth leaves clearance for rear-connected busbars or cable ladders in a typical 600 mm deep enclosure. No communication module means no extra wiring beyond the power terminals and the UVR coil connections.