It carries a 20 A continuous current at 40 °C ambient — no derating needed up to 55 °C where it still holds 20 A, then drops to 19 A at 60 °C through 70 °C. That thermal curve makes it a straight pick for a panel running warm but not hot; no need to oversize for a 50 °C enclosure interior. Breaking capacity hits 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V or 690 V. That 121 kA figure at 240 V means it handles high-fault utility feeds without cascading upstream — common in North American 240/120 V split-phase service entrances or large 240 V motor control centers.
TM240 release and protection design
The overcurrent release is the TM240 thermal-magnetic type — fixed thermal pickup with magnetic short-circuit trip. This is a plain-vanilla line protection breaker: no accessories inside the frame, so what you see on the nameplate is what the BOM gets. Insulation voltage rated at 800 V, which covers 690 V systems with margin.
IP40 on the front means dry indoor panels only; no washdown. Max power loss 12 W — negligible heat contribution in a ventilated enclosure.