The Siemens SENTRON 3VA2220-5MN32-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 200 A, designed specifically for motor protection — not just cable or busbar protection. It ships with an ETU350M electronic trip unit that includes phase failure detection, so it catches the single-phasing condition that cooks a motor winding before the thermal overload relay would.
Breaking capacity — what it can interrupt
This MCCB's interrupting rating varies sharply with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. At 415 V, that 121 kA figure puts it well above typical industrial service-entrance fault levels — you're not coordination-limited by the breaker in most downstream panel designs. The 17 kA at 690 V is still adequate for most 690 V motor circuits, but check your available fault current before committing the BOM line.
Thermal derating — don't let the 200 A sticker fool you
The 200 A rating holds flat from 40 °C to 50 °C ambient. At 55 °C it derates to 192 A, at 60 °C to 188 A, at 65 °C to 184 A, and at 70 °C to 180 A. If this breaker lives in a non-air-conditioned enclosure next to a drive or transformer, use the 55 °C or 60 °C column for your load calculation — the 200 A number is only valid up to 50 °C. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Panel fit and auxiliary contacts
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is standard for a 200 A frame — it occupies three 35 mm DIN-rail modules worth of panel space, so plan your gland-plate layout accordingly. No undervoltage release is fitted from the factory.