The MGN15711 is a Schneider Electric Acti9 SBI fuse-disconnector, 3 poles, rated 50 A at 690 V AC, accepting 14 x 51 mm fuse links with a GG or AM curve.
This order code is marked obsolete by the manufacturer. No direct successor order code is listed in the available records.
Key Ratings & Fit
The 50 A continuous rating is the top end of the current range for this body size; the same housing also carries 10 A through 40 A variants.
Integration
Screw-clamp terminals accept 2.5 to 25 mm² rigid or flexible cable — one cable per clamp. The 70 mm depth and 107 mm height fit standard distribution board envelopes; the 79.5 mm width (9 x 9 mm pitches) is the 3-pole footprint.