Rated for AC-3 duty per IEC 60947-4-1, which is the standard for starting and stopping squirrel-cage motors — the most common motor load in industrial panels. The 25 A frame covers motors up to 11 kW at 400 V or 15 kW at 500 V, depending on your line voltage. Breaking capacity hits 100 kA Icu at 240 V AC, dropping to 50 kA at 415 V and 8 kA at 690 V.
The magnetic trip range is 150–350 A — that's the instantaneous short-circuit pickup. On a 25 A motor circuit breaker, that's about 6–14x In, which is typical for motor starting inrush. If your motor's locked-rotor current exceeds 350 A, this breaker might nuisance-trip on startup; if it's below 150 A, the magnetic element may not clear a bolted fault fast enough. Mechanical durability is rated at 40,000 cycles — that's the number of on-off operations the handle mechanism is designed for before wear affects performance. Electrical durability at full AC-3 load (25 A, 440 V) is 20,000 cycles; at half load (In/2) it doubles to 40,000 cycles. So if you're cycling a conveyor start-stop every 5 minutes, that's about 70 days of 24/7 operation before the contacts wear out — plan spares accordingly. Operating altitude up to 5000 m, any mounting position — so it works in high-altitude installations where air-insulated gear derates.
Integration notes
EverLink screw terminals on top and bottom — top accepts 1.5–70 mm² solid or 1.5–50 mm² flexible; bottom accepts 2.5–95 mm² solid or 2.5–70 mm² flexible. Tightening torque is 9 N·m for the larger cable range, 5 N·m for smaller. That's a standard screwdriver torque, not a hex-key special — field-serviceable with common tools. Dimensions: 81 mm wide, 155 mm high, 165 mm deep. The grey RAL 7016 colour is consistent across the TeSys Deca range, so a panel with mixed GV4 sizes looks uniform. Rotary handle control type — gives a clear visual indication of contact position, and the handle can be padlocked in the OFF position for lockout/tagout. Isolation capability is certified per IEC 60947-1, so it's suitable for use as a disconnecting means during maintenance.