The MGP0302L3N is a Schneider Electric PowerPacT 4 molded case circuit breaker (MCCB) rated 30 A at 40 °C, 1P+N poles, 230 V AC 50/60 Hz operational voltage. It uses a thermal-magnetic TM-D trip unit with LI protection — L for thermal overload, I for magnetic short-circuit.
Ics is the same 25 kA, meaning it can also be reclosed after a fault at that level (service breaking capacity equals ultimate here). The 750 V rated insulation voltage (Ui) and 8 kV impulse withstand (Uimp) tell you it's built for distribution panels where transient overvoltages are expected. Backplate mounting with horizontal or vertical orientation gives flexibility in enclosure layout.
This is a distribution circuit breaker for panel-mounted installation — typically in a main or sub-feed distribution board protecting a branch circuit. The 1P+N configuration (switching line and neutral, protecting only the line) suits single-phase loads at 230 V AC. The 2-module width (35 mm per module) fits standard DIN-rail enclosures, though the mounting support is backplate, not snap-on DIN rail.