Siemens SENTRON 3VM1020-4ED42-0AA0 — 4-Pole MCCB with TM210 Release
Its interrupting capacity is rated at 121 kA at 240 V AC, 76 kA at 415 V, 40 kA at 440 V, and 12 kA at 500 V — figures that define the maximum fault current it can safely clear at each voltage level without upstream coordination failure. The breaker holds its full 20 A rating from 40 °C through 55 °C ambient, then derates to 19 A at 60–65 °C and 18 A at 70 °C, so panel internal temperature rise matters for continuous loading.
The 3VM1020-4ED42-0AA0 carries a current production lifecycle status — it remains in active manufacture as of the latest Siemens lifecycle records, with no announced end-of-life or last-time-buy window.
Physical Fit & Panel Integration
The breaker measures 101.6 mm wide, 130 mm tall, and 70 mm deep — a 4-inch wide footprint that occupies four standard DIN-rail module spaces in a distribution panel or enclosure. Maximum power dissipation is 12 W at rated load, which should be factored into enclosure thermal calculations to avoid exceeding the 70 °C maximum operating ambient.
The TM210 release designates a fixed thermal-magnetic trip unit with an adjustable long-time pickup (Ir) up to 320 A maximum — though the breaker frame is rated 20 A continuous, the release element itself can be set lower for downstream coordination. No ground-fault monitoring, no neutral protection, and no communication function are built in — this is a straightforward line-protection MCCB for basic overcurrent and short-circuit duty, not a smart breaker with metering or remote trip.