Fixed-mounted circuit breaker, UL1066/IEC60947-2, FS 1, 4-poles, N-pole left, In=800A up to 730V AC 50/60Hz, breaking capacity E, 65/65kA at 635/730V AC, Trip unit ETU600 LSI upgrade ready , color display, USB and optional bluetooth, Protection LT, ST, INST, include N-protection, (internal N-sensor available), incl. trip/bell alarm (1xCO), rear horizontal connection,