The Siemens SENTRON 3VA1112-5ED36-0AC0 is a 3-pole molded case circuit breaker rated 125 A continuous at 40 °C, with a TM210 thermal-magnetic overcurrent release and a line protection designation.
Interrupting ratings and thermal derating
At 240 V the breaker interrupts 187 kA; at 415 V it handles 121 kA, dropping to 76 kA at 440 V and 17 kA at 500 V and 690 V. The continuous current rating holds at 125 A from 40 °C through 50 °C, then derates to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C.
Construction and auxiliary contacts
It is a straight line-protection device for pure overcurrent and short-circuit duty.