What this breaker does on the line
Rated for 277 VAC and 500 VDC, with a 6 kA interrupting capacity on AC and 10 kA on DC.
The 2-pole width (roughly 36 mm for most S200 series) fits in a standard distribution board or control panel alongside other DIN-rail components like contactors, relays, and power supplies. Terminals accept copper conductors up to 25 mm², which is adequate for the 30 A rating. Torque to the manufacturer's spec (typically 2.5–3 Nm for this class) to maintain the rated interrupting capacity.