Fixed-mounted circuit breaker, UL1066/IEC60947-2, FS 2, 4-poles, N-pole left, In=2000A up to 635V AC 50/60Hz, breaking capacity H, 100/85kA at 508/635V AC, Trip unit ETU600 LSIG upgrade ready , color display, USB and optional bluetooth, Protection LT, ST, INST, GFx, include N-protection, (internal N-sensor available), incl. trip/bell alarm (1xCO), front connection double hole