What this MCCB carries and why it matters
The Siemens SENTRON 3VA1132-4EF32-0BH0 is a 3-pole molded case circuit breaker rated for 32 A continuous current at 40 °C ambient, with no derating needed up to 50 °C — at 55 °C it still holds 31 A, and at 70 °C it holds 30 A, so in a warm panel or next to other heat sources you lose only 2 A across the full operating range. Breaking capacity is 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — that covers most industrial distribution voltages and means this breaker can interrupt a high-fault bolted short without upstream coordination issues, provided the available fault current at the panel doesn't exceed those values. Rated insulation voltage is 800 V, so it's suitable for 690 V systems with margin; maximum power loss is 13.1 W, which matters for panel thermal budgeting when multiple breakers are ganged.
Auxiliary and release configuration
This unit ships with an undervoltage release (UVR) and a complement of two auxiliary switches plus one trip-alarm switch (HQ) — the UVR will trip the breaker if control voltage drops below its dropout threshold, which is standard for motor feeder circuits where loss of control power must open the load, and the auxiliary contacts provide status feedback to a PLC or annunciator panel. The breaker is designed for line protection (not motor protection with overloads), so it's a straight thermal-magnetic or electronic trip unit for cable and busbar protection; the trip indicator is present for quick fault identification.
Dimensions and panel fit
At 76.2 mm wide, 130 mm tall, and 70 mm deep, this 3-pole MCCB fits standard SENTRON mounting footprints — the width is exactly 3 inches, which matches the common DIN-rail or panel-mount cutout for three-pole breakers in this class, so a panel laid out for a 3VA1 frame will accept this unit without re-drilling.