The Siemens SENTRON 3VA1112-5EE36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 125 A continuously at 40 °C with no derating up to 50 °C — the TM220 thermal-magnetic release holds flat through that range, then tapers to 114 A at 70 °C. The interrupting rating hits 187 kA at 240 V AC, 121 kA at 415 V, and 75.6 kA at 440 V, which gives selectivity headroom for high-fault panels downstream of a large transformer.
The 3VA1112-5EE36-0AA0 measures 130 mm high by 76.2 mm wide by 70 mm deep — a standard 3-pole MCCB footprint that drops into SENTRON distribution panels and most DIN-rail-mount enclosures without re-drilling. Front IP40 protection class keeps dust out of the terminal area in enclosed panels; no trip indicator or undervoltage release on this variant, so external signaling relies on the auxiliary contact block if fitted.
Insulation voltage rated at 800 V, with an operating range of -25 °C to 70 °C and storage from -40 °C to 80 °C. Maximum power loss at rated load is 28.1 W — factor that into cabinet thermal calculations if the breaker is enclosed with other heat sources. No communication function, ground-fault monitoring, or undervoltage release on this base variant; it is a straight thermal-magnetic line-protection device.