What this 200 A MCCB is and where it fits
The Siemens SENTRON 3VA1220-4GF42-0HA0 is a 4-pole molded case circuit breaker (MCCB) with a fixed 200 A rating and a TM240 thermal-magnetic overcurrent release. It carries a shunt trip (STL) auxiliary release for remote tripping, making it suitable for line-protection duty in distribution panels and motor control centers where the load current is known and fixed — no adjustable trip block to set. The interrupting ratings tell you where this breaker can live on the fault-current curve: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V. At 415 V — common for industrial three-phase distribution — it clears 75.6 kA, which covers most secondary-side transformer faults in a standard plant without needing a current-limiting fuse upstream. Rated insulation voltage is 800 V, so the breaker is rated for 690 V systems with margin. The operating temperature range is -25 °C to 70 °C, with full 200 A current-carrying capacity up to 50 °C; above that, derate linearly to 176 A at 70 °C. Max power loss at rated load is 42 W — relevant for thermal management in a tightly packed enclosure.
Physical fit and panel integration
Dimensions are 140 mm wide, 158 mm high, and 70 mm deep. The 140 mm width across 4 poles means each pole occupies 35 mm — standard for SENTRON 3VA1 frame sizes. Verify the DIN-rail or mounting-plate pitch against the existing cutout; the 158 mm height fits most 200 A MCCB compartments, but check gland-plate clearance for the 70 mm depth plus wiring bend radius. The supplied basic switch is order code 3VA12204GF420AA0 — that is the internal switching mechanism. The shunt trip (STL) release allows a remote control system or emergency-stop circuit to trip the breaker electrically; there is no undervoltage release on this variant, so a loss of control power will not automatically open the breaker.
Lifecycle and sourcing posture
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time. If you are replacing a failed unit or filling a BOM line, this is the active Siemens part number — no second-source cross-reference needed.