Siemens Low Voltage VL IEC Breakers - 3VL4 IEC Breakers are Circuit Protection Molded Case Circuit Breakers. CIRCUIT-BREAKER VL 400L VERY HIGH BREAKING CAPACITY ICU=100KA / 415 V AC 4 POLE, LINE PROTECTION ELECTRONIC TRI-POLEUNIT LCD ETU42, LSIG IN=400A, RATED CURRENT IR=160-400A, OVERLOAD ISD=1,5TO10XIR, II=11XIN SHORT-CIRCUIT N PROTECTED WITH EARTH FAULT WITHOUT AUXILIARY RELEASE WITHOUT AUXILIARY/ALARM SWITCH WITH SAFETY LABEL FOR USA