The Siemens 3VA1120-6EF32-0BA0 is a SENTRON molded case circuit breaker (MCCB) rated 20 A continuous at 40 °C across a 3-pole frame, with a 220 kA interrupting capacity at 240 V AC — that's the headline number for fault clearing on a high-available-fault panel.
The interrupting curve drops fast as voltage climbs: 154 kA at 415 V, 121 kA at 440 V, then a cliff to 17 kA at 500 V and 690 V. That's the spec that trips up a spec-in when someone reads the headline and misses the voltage column.
Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a standard 3-pole MCCB footprint that drops into a SENTRON panelboard or standalone enclosure. The undervoltage release is wired to the control circuit; verify the dropout voltage against your 24 VDC or 120 VAC control supply before commissioning.