What this MCCB is — and what the ratings mean for your panel
The Siemens SENTRON 3VA2116-5HL32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, built around the ETU320 electronic trip unit. Its 160 A continuous current at 40 °C is the number that governs the feeder size — not the interrupting capacity. That 160 A holds flat through 50 °C (–), then derates to 154 A at 55 °C and 136 A at 70 °C (–), so if this breaker lives in a hot enclosure near drives or transformers, the actual ampacity you can count on is the derated value, not the nameplate 160 A. The interrupting ratings tell you where this breaker can be applied without cascading upstream: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V (–). That 187 kA at 240 V is the headline number — it handles high available fault current at low-voltage service entrances. At 690 V the 4.25 kA figure drops sharply, so verify the fault current at the point of installation if you are using it on a 690 V system. The ETU320 is a basic electronic trip unit with no communication, no voltage trigger, no undervoltage release, and no ground-fault monitoring. It is a straight thermal-magnetic replacement path — no bells, no bus. The auxiliary contact version is 2 switches HP, which is enough to signal the breaker state to a PLC or status lamp, but do not expect a shunt trip or alarm contact out of the box.
Mounting and integration — fits standard MCCB footprint
Dimensions: 181 mm high, 105 mm wide, 86 mm deep. The 105 mm width is the standard 3-pole MCCB frame width for this SENTRON series — it drops into a panel that takes a 3VA2 frame without re-drilling the mounting plate. Front IP40 means it is protected against tools and small wires entering the front face, but the back and sides are open to the enclosure environment.