QMR Heavy duty disconnect switch. 100 A rating. 1700 A at 600 VAC, 3-phase interrupting rating symmetrical. QMR and QMW switches (30 to 200 A), fuse and no-fuse kits are UL recognized components, file E-36152. 30 to 200 A fusible switches are UL recognized for use on circuits capable of delivering not more than 200000 RMS symmetrical at 240 or 600 VAC when fused with Class R rated size fuses. Suitable for use with Type STDA flange handles and variable depth operating mechanisms.