Motor protection circuit breaker for the panel builder
At 690 V it still interrupts 2 kA, which covers most industrial supply transformers.
That prevents single-phasing on a motor load, which is the quickest way to cook a winding. No forced spacing needed above or below — 20 mm upwards and downwards, zero forwards and backwards. Storage and transport tolerate -50 to +80 °C, so it survives a cold warehouse or a hot truck without issue.
Mounting position is any orientation — no derating needed for horizontal or inverted installation. Terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²). The main contact screws are M3. No special tools beyond a standard screwdriver.