Siemens SENTRON 3VA1132-6EF36-0CH0 — 32 A MCCB for Line Protection
Breaking capacity is the headline spec here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. Those numbers mean this breaker can safely interrupt fault currents up to those levels without welding contacts or rupturing the case — critical for high-fault installations like transformer secondaries or large motor control centers where upstream fault current can exceed 100 kA. The 690 V rating at 17 kA also makes it usable in 600 V class Canadian and some IEC industrial networks. Mounts on a standard DIN rail or panel-mount base. The 76.2 mm width (3-pole) and 130 mm height fit the SENTRON 3VA family footprint, so it drops into existing SENTRON panel layouts without re-drilling. IP40 on the front means it's protected against tools and wires >1 mm — fine for enclosed distribution boards, but not for washdown areas.
Thermal Derating and Ambient Temperature
The breaker holds its full 32 A rating from 40 °C up to 50 °C. Above that, it derates linearly: 30.72 A at 55 °C, 30.08 A at 60 °C, 29.44 A at 65 °C, and 28.8 A at 70 °C. If your panel ambient runs above 50 °C, size the breaker for the derated current — not the nameplate Iu. The operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Auxiliary Contacts and Undervoltage Release
Factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ type) — that gives you two form-C contacts for status feedback to a PLC or indicating lamp, plus a dedicated alarm contact that changes state only when the breaker trips on fault, not on manual open. The undervoltage release (UVR) is built in; it will trip the breaker if control voltage drops below about 70% of rated. This is standard for applications where a loss of control power must open the main disconnect — emergency stops, safety circuits, or sequential start interlocks. The integrated auxiliary trip module is order code 3VA9608-0BB24, a separate line item if you need a spare.