It is designed for motor protection, with phase failure detection built in and no ground fault detection. The footprint is 97 mm deep, 45 mm wide, and 97 mm tall — a compact S0 frame that fits standard distribution boards.
Coordination and Back-Up Protection
The breaker requires back-up fuses for short-circuit coordination. At 400 V, the maximum fuse size is gG 63 A; at 500 V and 690 V, it drops to gG 50 A. This means the upstream fuse must be sized to these limits to maintain the breaker's interrupting capacity.
Motor Ratings Across Voltages
This breaker covers a wide voltage range: 20 to 690 V. Motor horsepower ratings are given for common North American and IEC voltages: 3 hp at 230 V, 2 hp at 110/120 V, 5 hp at 200/208 V, 7.5 hp at 220/230 V, 15 hp at 460/480 V, and 20 hp at 575/600 V. The continuous current rating at 480 V and 600 V is 25 A.
Main circuit terminals are screw-type, accepting solid or stranded copper: 2 x (1 to 2.5 mm²) or 2 x (2.5 to 10 mm²). The screw head requires a Pozidriv size 2 tip or a 5–6 mm diameter screwdriver shaft. Main contact screws are M4. The terminal design is straightforward for panel builders — no special crimp tools needed.