Motor protection MCCB with ETU350M — 200 A frame, 187 kA interrupting capacity
The Siemens SENTRON 3VA2220-5MN32-0KA0 is a 3-pole molded case circuit breaker (MCCB) in the motor protection version, rated for a continuous current Iu of 200 A and carrying an interrupting capacity of 187 kA at 240 V. That 187 kA figure at 240 V means it can safely clear a fault current up to that level without failing or cascading upstream — critical for high-fault installations like large motor control centers or transformer-fed switchboards where available fault current can exceed 100 kA. The interrupting curve drops to 121 kA at 415 V and 440 V, then to 75.6 kA at 500 V, and 17 kA at 690 V, so the voltage class of your distribution system directly governs which rating applies. This MCCB uses the ETU350M electronic overcurrent release, which provides adjustable thermal-magnetic-like protection curves plus phase-failure detection. The phase-failure detection is a key differentiator for motor loads — it trips the breaker when one phase drops out, preventing single-phasing damage to the motor winding. The unit includes a shunt trip (STL) for remote tripping via a control signal, but no undervoltage release, no auxiliary contacts, and no ground-fault monitoring. The integrated auxiliary trip module is order code 3VA9688-0BL33; the basic switch is 3VA2220-5MN32-0AA0.
Thermal derating and panel fit
The breaker holds its full 200 A rating from 40 °C through 50 °C ambient. Above that it derates: 192 A at 55 °C, 188 A at 60 °C, 184 A at 65 °C, and 180 A at 70 °C. If the panel ambient inside your enclosure hits 55 °C — common in a packed MCC lineup — you lose 8 A of headroom. The maximum power loss is 75 W, which factors into enclosure ventilation sizing. Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for the SENTRON 3VA platform, so it fits existing Siemens panel layouts and busbar systems without re-drilling.
Compliance and approvals
As a Siemens SENTRON product, the 3VA2220-5MN32-0KA0 carries IEC 60947-2 certification for molded case circuit breakers, and is designed to meet UL 489 requirements for the North American market. The rated insulation voltage is 800 V, which covers 480 V and 600 V class systems with margin. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The unit is RoHS and REACH compliant per Siemens standard declarations.