The Siemens 3VA1120-6EF36-0AG0 is a 3-pole molded case circuit breaker (MCCB) from the SENTRON line, rated for 20 A continuous current and fitted with a TM240 thermal-magnetic overcurrent release — meaning the thermal trip element is fixed at 20 A and the magnetic short-circuit pickup is adjustable via the TM240 dial, covering the typical range for motor branch or feeder protection in distribution panels. Its interrupting capacity hits 220 kA at 240 V AC, 154 kA at 415 V, 121 kA at 440 V, and still holds 17 kA at 690 V — numbers that put it squarely in the high-fault-current class for industrial switchgear where upstream transformer capacity or parallel-feed sources drive available fault current well above 100 kA.
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — the standard 3VA frame footprint, so it drops into a panel cut-out or DIN-rail adapter designed for the SENTRON 3VA family without re-drilling.