Siemens SENTRON 3VM1120-4EE32-0AA0 — 20 A MCCB, TM220 Release
It holds 20 A continuously from 40 °C up through 55 °C, then derates to 19 A at 60 °C and above — so in a warm panel you keep full rating unless ambient pushes past 55 °C. Breaking capacity steps with system voltage: 121 kA at 240 VAC, 76 kA at 415 VAC, 53 kA at 440 VAC, and 12 kA at 500 VAC. That 121 kA at 240 V gives headroom for high-fault panels downstream of a large transformer; the 12 kA at 500 V still clears most industrial service-entrance faults. Rated operational voltage is 690 VAC maximum; DC rated voltage is 500 V. Insulation voltage is 800 V.
Sourcing & Lifecycle — Active, Quoted to Order
Power loss is 12 W maximum at rated load. Dimensions are 70 mm depth, 76.2 mm width, 130 mm height — a standard SENTRON 3VM footprint that fits existing panel cutouts and busbar arrangements.
Integration — Panel Fit and Coordination
The 70 mm depth keeps the breaker within standard 200 mm deep enclosures without interfering with wiring ducts.