What this MCCB carries and where it fits
The Siemens 3VA1220-5EF42-0DC0 is a SENTRON molded case circuit breaker (MCCB) rated 200 A continuous at 40 °C, 4-pole, designed for line protection in distribution panels. Its breaking capacity hits 187 kA at 240 V AC (per) and 121 kA at 415 V AC (per), so it handles high-fault-current service entrances or large subfeeds without cascading upstream. The part carries an undervoltage release (UVR) as the auxiliary release, meaning the breaker trips on loss of control voltage — a common requirement for emergency-stop or undervoltage protection schemes.
Current rating and thermal derating
Rated 200 A from 40 °C through 50 °C ambient. Above that, derate linearly: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, 176 A at 70 °C (–). For a panel pushing 55 °C internal ambient, that 194 A ceiling is the number to size against — not the 200 A nameplate.
Breaking capacity by voltage
187 kA at 240 V AC, 121 kA at 415 V AC, 75.6 kA at 440 V AC, 30 kA at 500 V AC, 17 kA at 690 V AC (–). These are the ultimate short-circuit interrupting ratings per IEC 60947-2. At 480 V (common North American industrial voltage) the 75.6 kA at 440 V is the closest published figure — conservative to use that for 480 V system fault duty.
Lifecycle and sourcing posture
Listed as current production. This is an active BOM-line part, not a phase-out item. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.
Physical fit and integration
Dimensions: 140 mm wide, 158 mm high, 70 mm deep. Four-pole MCCB, so it occupies a full 4-module width on a DIN rail or panel-mount base. The 70 mm depth is shallow enough for most 200 mm-deep enclosures without crowding the gland plate. Undervoltage release (UVR) is factory-fitted; two auxiliary switches (HQ type) are also included for remote status indication.