SENTRON 3VA1020-3ED32-0CC0 — 20 A Molded Case Circuit Breaker with Undervoltage Release
The Siemens 3VA1020-3ED32-0CC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in industrial power distribution. It's a 3-pole unit rated at 20 A continuous at 40 °C, and it holds that rating all the way up to 55 °C — only dropping to 19 A at 70 °C. That thermal stability matters when you're packing breakers tight in a panel where ambient heat builds. Breaking capacity is 75.6 kA at 240 V AC, 52.5 kA at 415 V, and 32 kA at 440 V — still 7.5 kA at 690 V. That's a high-interrupting rating for a 20 A frame, meaning it can clear serious fault current without the arc finding another path through the panel steel. This variant ships with an integrated undervoltage release (UVR) and two auxiliary switches (HQ design). That UVR is what drops the breaker if control voltage falls below the dropout threshold — common on safety circuits where a loss of control power needs to kill the load. No communication function, no ground-fault monitoring — this is a straight line-protection MCCB, not a metering or smart breaker.
Panel Fit and Mounting
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep. That 3-inch width is a standard MCCB footprint for a 3-pole frame in this class — it'll land on a DIN rail or bolt directly to a mounting plate. The 70 mm depth means it won't crowd the gland plate on a 200 mm deep enclosure, but check your door clearance if the breaker has rotary handles or extended aux switches. Rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V class systems with margin. Power loss at full load is 14.5 W maximum — not trivial if you're stacking a dozen of these in a sealed box; account for that heat in your thermal calculation.
Lifecycle and Sourcing
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time. Compliance documentation (RoHS, REACH, UL, IEC) is standard with the brand — the 3VA series carries UL 489 and IEC 60947-2 listings.