Integrator's read on the 3VA1220-5GF42-0AD0
The Siemens 3VA1220-5GF42-0AD0 is a 4-pole SENTRON molded case circuit breaker rated for line protection, carrying a TM240 thermal-magnetic overcurrent release and a continuous current rating of 200 A. The interrupting capacity is the headline here: 187 kA at 240 V AC, 121 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V — meaning this breaker handles fault currents up to those levels without upstream coordination failure. That 187 kA at 240 V puts it in the high-interrupting class for industrial switchboards where available fault current is stiff.
Thermal derating and real-world current
Rated continuous current Iu is 200 A, and it holds that rating flat from 40 °C through 50 °C. Above that, it derates: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. If your panel ambient runs above 50 °C, that 176 A at 70 °C is the number to size against — not the 200 A nameplate.
Physical fit and auxiliary contacts
Dimensions: 70 mm deep, 140 mm wide, 158 mm high. That 140 mm width on a 4-pole frame is standard for this class — verify the back-panel cutout matches your existing SENTRON or 3VA-series footprint before ordering. Ships with 3 auxiliary switches HQ (high-qualified) for status feedback to the PLC or annunciator panel. No trip indicator, no undervoltage release, no communication module on this variant.
Sourcing and lifecycle posture
Listed as current production in the SENTRON 3VA line. This is a standard catalog variant — not a special or phased-out build. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time. For a BOM freeze or volume buy, send the order code and target quantity.