What this 3VA1 breaker does on the line
The Siemens 3VA1220-6GF42-0AA0-ZD00 is a 4-pole IEC frame 250 molded-case circuit breaker rated for 200 A continuous current, with a 70 kA interrupting capacity at 415 V (breaking capacity class H). That Icu figure means it can safely clear a bolted fault up to 70 kA without welding its contacts or rupturing the case — critical for high-fault installations like transformer secondaries or large motor control centers where available fault current is substantial. The TM240 thermal-magnetic trip unit provides adjustable overload protection (Ir = 140 A to 200 A) and fixed short-circuit protection (Ii = 5 to 10 × In, so 1000 to 2000 A). The 100% N-conductor protection means the neutral pole is fully rated, not just a switched neutral — necessary for 4-wire systems with harmonic content where neutral current can approach phase current. This variant includes a nut keeper kit and is configured for DC Power OEM applications in China. The nut keeper secures the line/load lug fasteners against vibration in transport or high-vibration environments like inverter cabinets.
Lifecycle and sourcing posture
For a BOM line requiring this exact 3VA1 frame with the TM240 trip, 70 kA @ 415 V interrupting rating, and the China DC Power OEM configuration, the part is sourced to order against an RFQ. Availability and current pricing are confirmed at quote time through our independent distribution network.