The 20 A rating sizes it for branch circuits pulling up to that continuous current.
Snap-on DIN rail mount per EN 60715. The 69 mm width (roughly 4 module widths at 17.5 mm per module) and 89 mm height fit standard distribution boards and sub-panels. Depth of 94.5 mm leaves clearance for wiring and the screw terminals — plan for at least 100 mm of enclosure depth. Screw terminals accept copper conductors; strip length and torque values follow the marking on the side of the breaker. IP20 finger-safe terminals suit enclosed panels only — no washdown or outdoor exposure without a secondary enclosure.
