The Siemens SENTRON 3VA1020-2ED36-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection duty, carrying 20 A continuously at 40 °C ambient and delivering a breaking capacity of 52.5 kA at 240 V AC — sufficient for most commercial and light-industrial distribution panels where fault currents stay under that threshold.
The interrupting rating drops as system voltage rises: 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at both 500 V and 690 V.
Thermal rating and ambient derating
The 20 A rating holds flat from 40 °C through 55 °C, then derates to 19 A at 60 °C and 65 °C, and stays at 19 A through 70 °C.
Built-in undervoltage release
The auxiliary switches provide remote status feedback.
The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that fits Siemens SENTRON mounting accessories and most DIN-rail or screw-mount panel layouts.