It's built to handle the inrush characteristics of a transformer — that's the key difference versus a standard motor-protective breaker. The S00 frame size (45 mm wide, 97 mm deep, 106 mm tall) is the standard compact footprint for this class — fits the same panel cutouts as other S00 breakers.
Trip characteristics and thermal management
The 5.5 W power dissipation at AC in hot operating state is modest; no special ventilation required in a standard IP20 enclosure, but keep it away from other high-dissipation devices if you're packing the rail tight. Rated operating voltage spans 20 to 690 V, covering everything from 24 V control transformers up to 690 V distribution. The 100 kA SCCR at 400 V and above is the headline number for panel builders calculating fault ratings — it's the same 100 kA across 240 V through 690 V, so no derating curve to worry about at higher voltages.
Integration notes
Mounting position is any orientation — no derating for sideways or upside-down mounting. Clearance requirements: 50 mm upwards and downwards, 30 mm to the side, zero forwards or backwards. That 50 mm vertical clearance is important for the arc-quenching path; don't crowd the vents with wire duct or other components. The screwdriver tip spec is 3.0 x 0.5 mm, shaft diameter 3 mm — a standard Pozidriv #1 or flathead will engage the terminal screws properly. Storage and transport range extends to -50 to +80 °C — fine for unheated warehouses or container shipping. The 100,000 mechanical cycles on the main contacts is typical for this class; electrical life depends on the switching frequency (max 15 operations per hour at AC-3 duty) and the actual load current.