The thermal memory feature means the breaker tracks prior heating from overloads — if it trips on overload and you reset immediately, it will remember the heat and trip faster on the next event, protecting the cable from cumulative thermal stress.
Fixed-mount breaker with backplate mounting support. Dimensions are 205 mm high, 120 mm wide, 105 mm deep; connection pitch is 40 mm. Screw terminals on both the upside and downside connections (front-facing). Mounting position can be horizontal or vertical, which gives flexibility in panel layout. Overvoltage category III suits it for fixed-installation distribution panels downstream of the main service entrance.
Rated insulation voltage (Ui) is 1250 V AC — the breaker's insulation system can withstand that voltage, so it is safe for 800 V AC systems with margin. Electrical durability is 4000 cycles at 800 V In (full rated current), mechanical durability 20,000 cycles — this is a robust distribution breaker, not a switching device for frequent operation. Power dissipation per pole is 18 W, so at full load the three poles together dissipate 54 W — factor that into your panel thermal budget. Storage temperature range is -35 to 85 °C, which covers most warehouse conditions. Operating altitude is 0-2000 m without derating, 2000-5000 m with derating — above 2000 m the air is thinner and arc extinction is less effective, so the breaker's current-carrying and interrupting capacity must be reduced.