The Schneider Electric A9GSB650 is an Acti9 SBI fuse-disconnector, a 1P+N device rated for 50 A at 690 V AC, accepting 14 x 51 mm fuses with an AM GG curve.
The 50 A rating (from a multi-tap range of 10 A through 50 A) is the maximum for this unit; the fuse curve AM GG indicates general-purpose gG (gL) characteristics for cable and equipment protection. Pollution degree 3 (industrial environment) means the part is suitable for panels where conductive pollution or condensation may occur — no additional conformal coating needed for typical control-room or light-industrial enclosures.
Termination and installation
Tightening torque is 2.2 N·m on both top and bottom connections; wire strip length is 10 mm. The 53 mm width occupies 6 modules of 9 mm pitch on the DIN rail, which is a standard footprint for a 1P+N fused switch-disconnector in the Acti9 range.