Siemens 3VA1132-6EF32-0KH0 — SENTRON MCCB, 32 A, 3-Pole, High Breaking Capacity
Breaking capacity is the headline spec here: 220 kA at 240 V AC, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That 220 kA figure at 240 V means this breaker can safely interrupt a fault current up to that level without failing catastrophically — critical for high-fault installations like large transformer secondaries or industrial mains. At 690 V the 17 kA rating is still substantial for motor branch circuits. Thermal derating is minimal across the operating range: the breaker holds 32 A from 40 °C through 50 °C, then drops to 31 A at 55–60 °C, and 30 A at 65–70 °C. That's a tight curve — only 2 A lost from 40 °C to 70 °C, so it's well-suited for warm panel environments without oversizing.
Auxiliary Switching and Release Configuration
This variant ships with 2 auxiliary switches plus 1 trip alarm switch (HQ type), and a shunt trip release (STL) for remote tripping. The shunt trip allows a PLC or emergency-stop circuit to open the breaker electrically — useful for remote disconnection or safety interlocks. No undervoltage release is fitted, so the breaker will not automatically trip on loss of control power. The auxiliary switches provide status feedback (open/closed) and the trip alarm signals a fault condition independently. All are wired via the supplied basic switch 3VA11326EF320AA0. Panel builders should verify the auxiliary contact ratings against the control voltage in use.
Physical Fit and Panel Integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width (3 inches) is standard for 3-pole MCCBs in this class — it fits common Siemens SENTRON mounting bases and panel cutouts. Depth of 70 mm means it projects less than 3 inches from the mounting surface, leaving clearance for wiring and bus bars. Maximum power loss is 10.6 W. That's the heat the breaker dissipates at full rated current — relevant for thermal calculations inside a sealed enclosure. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.