What this MCCB carries and where it fits
The Siemens SENTRON 3VA2116-5HL36-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current (Iu) at 40 °C, with an ETU320 electronic overcurrent release and an integrated shunt trip (STL). It's a line-protection version — no ground-fault monitoring, no auxiliary contacts, no communication module — built for straightforward feeder or main-switch duty in distribution panels where you need a clean interrupting rating and a remote-trip capability. The interrupting ratings climb to 187 kA at 240 V and 121 kA at 415/440 V, then drop to 79 kA at 500 V and 4.25 kA at 690 V. That 187 kA at 240 V tells you this breaker is sized for high-fault-capacity service entrances or large sub-distribution boards where the available fault current is substantial — think industrial plant mains or commercial high-rise risers, not a light-duty panel. Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — standard SENTRON 3VA frame size for a 160 A pole. The shunt trip (order code 3VA9688-0BL30) is factory-integrated, so you get remote trip via a control voltage without adding an external module. The ETU320 release gives you electronic overcurrent protection with adjustable settings, a step up from thermal-magnetic on selectivity and accuracy.
Thermal derating and endurance
The 160 A rating holds flat from 40 °C to 50 °C. At 55 °C it derates to 154 A, then 148 A at 60 °C, 142 A at 65 °C, and 136 A at 70 °C. If your panel ambient runs above 50 °C, size the breaker for the actual load at the operating temperature — the derating curve is linear enough to interpolate. Latching endurance is 20 000 operations, which is typical for a fixed-mounted MCCB in a distribution board; it's not a switching-duty breaker for frequent load cycling.