160 A MCCB with ETU560 — what the ratings mean on your panel
The Siemens 3VA2116-5JQ32-0BL0 is a SENTRON molded case circuit breaker, line protection version, rated 160 A continuous current at 40 °C through 50 °C — no derating needed in a warm enclosure up to that point. Above 50 °C it steps down: 154 A at 55 °C, 148 A at 60 °C, 142 A at 65 °C, and 136 A at 70 °C. That temperature curve is what you size against if the breaker sits near other heat sources on the DIN rail. Interrupting capacity hits 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. At 415 V that's a 121 kA SCCR — enough to sit downstream of a large transformer without cascading upstream. The 690 V figure is lower but still covers most motor-circuit fault levels in IEC 60947-2 territory. The ETU560 electronic trip unit handles the overcurrent release. It's a three-pole breaker with an undervoltage release fitted, and it includes communication capability — so it can talk to a BMS or PLC for remote trip indication and load monitoring. The auxiliary contact set is 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch, which gives you enough dry contacts for a local annunciator and a remote SCADA input.
Mounting and panel fit
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. Maximum power loss is 28 W — that's the heat you need to vent in a sealed panel. Latching endurance is 20 000 operations, which is typical for a distribution breaker that sees infrequent switching. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.