Key Ratings for Fit
Rated operational current (Ie) reaches 630 A at 400 V AC-23B, 500 A at 500 V AC-23B, and 400 A at 690 V AC-23B. Conventional free air thermal current (Ith) is 630 A at 40 °C. Making capacity is 6300 A at 400 V AC-23B; breaking capacity is 5040 A at 400 V AC-23B. Short-circuit withstand is rated 70 kA, with a rated short-circuit making capacity (Icm) of 100 kA at 400 V when protected by gG fuses. Impulse withstand voltage (Uimp) is 12 kV.
Physical & Mounting
Dimensions: 458 mm wide, 300 mm high, 250 mm deep. Mounts on a plate. IP20 with terminal cover. Power circuit connections accept bars up to 63 mm² or lugs/ring terminals for 2 cables of 150 mm² or 300 mm². Tightening torque for power circuit is 44 N·m.
Comparison with GS2SB4
The GS2SB4 is a 3-pole variant of the same TeSys GS family. The GS2S4 adds a fourth pole (4P vs 3P), which matters if you need to switch the neutral or a second load circuit. Panel cutouts and mounting pattern are identical; the extra pole occupies the same footprint width.