Siemens NFK3R100L Molded Case Circuit Breaker. Siemens Molded Case Circuit Breaker, Low Voltage, Series: VL Series, 600Y/347 VAC, 100 A, 50/60 Hz Frequency, 18 kA Interrupt, FG Frame, Electronic/Thermal Magnetic Trip, 3 Pole, 3 ph, Line/Load Lug Connection, 4 AWG to 350 kcmil Wire, 40 deg C, 7.3 in H x 4.1 in W x 3.4 in D Dimensions. Additional Description: SIEM-NFK3R100L (N) BRKR VL NFG 3P 600Y 100A ETU5-LI LUG. Catalog Description: SIEMENS LOW VOLTAGE VL UL LISTED MOLDED CASE CIRCUIT BREAKER WITH ELECTRONIC TRIP UNIT (ETU). BREAKER NFG FRAME WITH NORMAL BREAKING CAPACITY. 100A 3-POLE (18KAIC AT 600Y/347V) (35KAIC AT 480V). ETU555 LI NON-INTERCHANGEABLE TRIP UNIT. EXTERNAL CONNECTION LINE AND LOAD LUGS (TAW1FG350) WIRE RANGE 4AWG - 350KCMIL (CU/AL). DIMENSIONS (W x H x D) IN 4.1 x 7.3 x 3.4..