Fixed-mounted circuit breaker, UL1066/IEC60947-2, FS 2, 3-poles, In=1600A up to 635V AC 50/60Hz, breaking capacity S, 65/65kAat 508/635V AC, Trip unit ETU300 LSI optimized for standard applica- tions, without display Protection LT, ST, INST, N-protection requires an external N-sensor, incl. trip/bell alarm (1xCO), front connection double hole