What this MCCB delivers on the line side
The Siemens SENTRON 3VM1220-4ED32-0AA0 is a 3-pole molded case circuit breaker (MCCB) built for line protection — the primary feed side of a distribution panel, not branch-circuit motor protection. Its TM210 thermal-magnetic release gives a fixed 200 A continuous rating at 40 °C, and the same 200 A holds at 45 °C and 50 °C; only above 55 °C does it start to derate, dropping to 194 A at 55 °C and 176 A at 70 °C (–). That flat thermal curve through 50 °C is useful in a warm enclosure where a breaker that starts derating at 40 °C would force an upsized frame. Breaking capacity is where this part earns its place: 121 kA at 240 V AC, 76 kA at 415 V, 53 kA at 440 V, and 17 kA at 500 V. At 240 V it handles the highest fault current a typical 480 V / 277 V panel can deliver on a line-to-neutral fault, so it clears without upstream coordination headaches. The 690 V AC rated operating voltage and 800 V rated insulation voltage cover most industrial distribution voltages through 600 V class.
Panel fit and mounting
Measures 105 mm wide, 158 mm high, 70 mm deep. IP40 front protection. Power loss 42 W maximum.
What the TM210 release means for your BOM
TM210 release: fixed thermal-magnetic trip, 200 A continuous rating. Magnetic pickup not adjustable.
Compliance and documentation
This MCCB carries the standard Siemens SENTRON compliance package: RoHS, REACH, and CE marking for the European market. UL and IEC certifications are typical for the series, though the specific listing for this order code should be verified against the nameplate at receipt. The product is designed for line protection and does not include ground-fault monitoring, undervoltage release, or communication function — it is a straightforward thermal-magnetic breaker with no auxiliary electronics.