The Siemens 3VA1216-4EF32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated 160 A at 40 °C, 3-pole, with a TM240 thermal-magnetic overcurrent release. The interrupting rating is 121 kA at 240 V AC, dropping to 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V — figures that govern its SCCR in a given panel.
Thermal derating and release type
The TM240 release holds 160 A continuously up to 50 °C ambient. Above that, derating applies: 156 A at 55 °C, 151 A at 60 °C, 147 A at 65 °C, and 142 A at 70 °C. The TM240 designation indicates a thermal-magnetic trip unit with a 240 A frame rating — the breaker's continuous current rating is set by the installed trip coil or electronic module, here 160 A.