The GV4LE50S6 is a 3-pole motor circuit breaker from the TeSys GV4 range, rated 50 A continuous and built for motor protection under AC-3 duty per IEC 60947-4-1. That AC-3 rating means it handles the inrush of a squirrel-cage motor during starting and switches it off under load — the 50 A figure governs the full-load motor current, not just the thermal trip setting. The magnetic electronic trip unit fires between 300 and 700 A for short-circuit protection, so it clears a bolted fault fast without nuisance tripping on normal start-up transients. Breaking capacity is the headline for panel builders doing fault coordination: 120 kA Icu at 240 V, 100 kA at 415 V, and still 10 kA at 690 V. That means it can sit upstream of a smaller MCCB or contactor without needing a current-limiting fuse for most industrial supply transformers. The 690 V rating also makes it usable on 600 V class Canadian and 690 V European line-ups.
Mounts in any position — no derating for side or horizontal orientation. Connection pitch is 27 mm without spreaders, 35 mm with, which matches standard DIN-rail terminal block spacing for clean panel wiring. Lugs or ring terminals on the power side; tightening torque is 9 N·m for the main cables (16–95 mm²) and 5 N·m for the control wiring (1.5–10 mm²). IP40 front panel protection, IK07 impact rating — fine for a dry indoor enclosure, not for washdown.
Operating altitude up to 5000 m, storage temperature from -50 to 85 °C. Climatic withstand per IACS covers marine and humid conditions. Fire resistance at 960 °C per IEC 60695-2-11.
Durability and mechanicals
Mechanical durability is 40,000 cycles; electrical durability at full-load AC-3 is 10,000 cycles at 440 V, or 20,000 cycles at half-load. Maximum operating rate is 25 cycles per hour — fine for a motor starter duty cycle, not for rapid jogging. Vibration resistance to ±1 mm at 2–13.2 Hz and 0.7 g at 13.2–100 Hz; shock rated at 15 g for 11 ms. Power dissipation is 6.1 W per pole, so three poles total about 18.3 W at full load — factor that into enclosure heating calculations.