The Siemens SENTRON 3VA1120-6EF36-0CA0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, rated 20 A continuously at 40 °C and delivering a short-circuit breaking capacity of 220 kA at 240 V AC.
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits Siemens SENTRON panelboards and most DIN-rail-mount enclosures with busbar systems.
Breaking capacity steps down with system voltage: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. Current rating is flat 20 A from 40 °C to 55 °C, then derates to 19 A at 60 °C through 70 °C — no derating needed in most 40 °C panel environments.
