The Schneider Electric MGN15709 is an Acti9 SBI fuse-disconnector, 1 pole + neutral, rated for 690 V AC and accepting fuse links sized 14 x 51 mm. It carries multiple current ratings in its spec — 10 A, 16 A, 20 A, 25 A, 32 A, 40 A, and 50 A — so the same base unit covers a range of branch-circuit protection needs by swapping the fuse link. The 50 A figure in the description is the maximum frame rating; the actual protection level is set by the installed fuse.
This part is marked Obsolete per the manufacturer's lifecycle record.
The screw-clamp terminals accept one rigid or flexible cable from 2.5 to 25 mm², with a tightening torque of 3.5 N.m. The 53 mm width and 107 mm height fit a 6-module pitch on the rail (9 mm per pitch).
Standards & Ratings
Built and tested to IEC EN 60947-3, the standard for disconnect switches and fuse-combination units. The AM GG fuse curve indicates a general-purpose gG (full-range breaking capacity) fuse link — typical for cable and equipment protection in distribution boards. Not padlockable, so if lockout/tagout is required on this circuit, plan for an external locking mechanism on the upstream isolation point.