What this 200 A SENTRON MCCB is and what it does
The Siemens 3VM1220-5GD42-0AA0 is a 4-pole molded case circuit breaker from the SENTRON family, rated for 200 A continuous current (Iu) with a TM210 thermal-magnetic release. It's built for line protection in distribution panels, motor control centers, and feeder circuits where you need high interrupting capacity without a communication module or ground-fault monitoring built in. The 200 A rating holds steady up to 50 °C, then derates to 176 A at 70 °C — so if this lives in a hot enclosure, you size the load accordingly.
Breaking capacity — what the numbers mean for your fault duty
This breaker punches hard on interrupting capacity: 187 kA at 240 V, 121 kA at 415 V, 76 kA at 440 V, and 30 kA at 500 V. Those are the maximum fault currents it can safely clear at each voltage level. For a 480 V panel with a 65 kA available fault current, the 76 kA at 440 V rating gives you comfortable headroom — no need to cascade upstream. The 30 kA at 500 V covers the high-end industrial bus. The 690 V insulation voltage (Ui) means the internal creepage and clearance are built for 600 V class systems.
Panel fit and mounting
The 3VM1220-5GD42-0AA0 measures 70 mm deep, 140 mm wide, and 158 mm tall. That 140 mm width is standard for a 4-pole MCCB footprint — it'll drop into most panel layouts without re-drilling the backplate. Front protection is IP40, so it's sealed against tools and fingers but not washdown. No motor drive option, no communication module; it's a straightforward thermal-magnetic breaker for hardwired distribution.