Rated 20 A continuous at 40 °C through 55 °C, it derates to 19 A at 60 °C and holds there through 70 °C — so in a warm panel you lose 1 A, not a full trip curve shift. Interrupting capacity hits 187 kA at 240 VAC, 121 kA at 415 V, 75.6 kA at 440 V, and still 17 kA at 500 V and 690 V — that's a high-fault-rated breaker for distribution boards where upstream transformer capacity is substantial. Footprint is 76.2 mm wide by 130 mm tall by 70 mm deep — three standard 25 mm module widths on a DIN rail, which means it drops into a 3-module slot in most SENTRON panelboards without adapters.
Thermal-magnetic release and line protection duty
That keeps the part simple and repeatable for BOM-locked line protection where you want the same trip characteristic every time.