The Siemens SENTRON 3VA1220-4GF42-0CA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection duty, carrying a continuous 200 A at 40 °C and holding that rating undiminished through 50 °C — only then does it begin a gradual derating curve, reaching 176 A at 70 °C. That thermal headroom matters when the breaker sits inside a crowded, warm panel and you need the full 200 A available for the feeder.
Interrupting capacity and release
Interrupting capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that place it squarely in high-fault applications like switchboard mains or large distribution feeders where available fault current is substantial. The TM240 thermal-magnetic release provides fixed thermal and magnetic trip thresholds, no communication function, so this is a straightforward overcurrent protector without remote monitoring. An undervoltage release (UVR) is factory-fitted, meaning the breaker trips on loss of control voltage — a common requirement in safety circuits where a voltage dip must open the main disconnect. No ground-fault monitoring is included; if GF protection is needed, it must be added externally.
Dimensions and panel fit
At 70 mm deep, 140 mm wide, and 158 mm tall, this 4-pole MCCB fits the standard SENTRON 3VA footprint. The 70 mm depth is the dimension that matters most when sliding it into a fixed-depth enclosure — verify gland-plate clearance before wiring. Insulation voltage is rated 800 V, covering 690 V line-to-line systems with margin.