SENTRON 3VA1132-3EF36-0DC0 — 32 A MCCB with Undervoltage Release
The Siemens SENTRON 3VA1132-3EF36-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 32 A continuously at 40 °C ambient without derating. Breaking capacity reaches 75.6 kA at 240 V AC, stepping down to 52.5 kA at 415 V and 32 kA at 440 V — enough to handle high-fault utility feeds in industrial distribution panels. The unit includes a factory-fitted undervoltage release (UVR) and two HQ auxiliary switches, so it arrives ready for remote trip signaling and undervoltage lockout without additional wiring.
What the Ratings Mean for Your Panel
The 32 A rating holds flat from 40 °C to 50 °C, then gently tapers to 30 A at 70 °C — no surprise derating curve to chase in a warm enclosure. Insulation voltage is rated 800 V, giving headroom for 690 V line-to-line systems. The 13.1 W maximum power loss matters when stacking multiple breakers in a confined DIN-rail array; factor that into your enclosure thermal budget. Operating temperature spans -25 °C to 70 °C, storage from -40 °C to 80 °C, so it ships and sits fine in unheated warehouses.
Panel Fit and Integration
At 76.2 mm wide × 130 mm high × 70 mm deep, this MCCB fits standard 3-pole MCCB panel cutouts and mounts via screw-clamp or optional DIN-rail adapter. The undervoltage release (UVR) is wired to a separate control voltage — typically 24 V DC or 230 V AC — and drops the breaker if that voltage falls below dropout threshold, which is the standard scheme for emergency-stop chains or upstream contactor interlocks. The two HQ auxiliary switches provide form-C (changeover) contacts for remote status: one for breaker open/closed, one for tripped indication. No communication module on this variant; it's a pure hardwired breaker.