SIEMENS LOW VOLTAGE 3VA UL MOLDED CASE CIRCUIT BREAKER WITH THERMAL -MAGNETIC TRIP UNIT. 3VA53 FRAME WITH MEDIUM LOW (CLASS M) BREAKING CAPACITY. 400A 3-POLE (18KAIC AT 600V) (35KAIC AT 480V). TM230 TRIP UNIT WITH FIXED Ir ADJUSTABLE Ii. SPECIAL FEATURES: CONNECTION WITH ALUMINUM LUG. 100 PERCENT RATED. DIMENSIONS (W x H x D) IN: 5.4 x 9.8 x 5.4.