The GV3L256 is a 3-pole motor circuit breaker from the TeSys Deca range, rated at 25 A continuous current (In). That 25 A figure is the uninterrupted duty rating per IEC 60947-4-1 — the current it carries continuously without tripping, which sets the maximum motor FLA it can protect. The magnetic trip unit fires at 350 A, so it handles motor inrush without nuisance trips while still clearing a bolted fault fast. At 690 V it still clears 6 kA. Motor power coverage spans 11 kW at 400 V through 18.5 kW at 690 V (50/60 Hz). The 25 A frame covers the common 11 kW motor at 400 V, with headroom to 15 kW at 500 V if your line voltage runs higher. That's the selection parameter: match the motor nameplate FLA to the 25 A In, not the kW figure directly.
The 55 mm width and 136 mm depth fit standard motor-starter footprints — plan for 17.5 mm connection pitch between phases without spreaders. Rotary handle control means it can be operated from the panel door with a standard through-door mechanism. IP20 finger-safe terminals suit enclosed panels. Climatic withstand per IACS covers marine and humid environments. Fire resistance at 960 °C per IEC 60695-2-11 means the enclosure won't propagate a flame in a fault event.
Listed to EN/IEC 60947-2 (circuit-breaker standard) and EN/IEC 60947-4-1 (motor-starter standard), plus UL 60947-4-1 and CSA C22.2 No 60947-4-1. Also complies with IEC/EN 60335-1 Clause 30.2 and IEC/EN 60335-2-40 Annex JJ for appliance applications.