Product Description
The Square D QMB365W Series E1 is a heavy-duty fusible QMB branch switch designed for industrial electrical distribution applications. This unit is rated for 400 amps, 3 poles, and up to 600 VAC / 250 VDC. It features a manually operated external disconnect handle and three installed fuse positions within the enclosed switch assembly.
The factory nameplate identifies this unit as a QMB365W Series E1 and lists horsepower ratings for 480 VAC and 600 VAC three-phase applications. The internal label specifies compatibility with 75°C copper or aluminum conductors and provides fuse and installation requirements. Fuses shown in the photos are included.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Square D |
| Catalog Number | QMB365W |
| Series | E1 |
| Product Type | QMB Fusible Branch Switch / Disconnect |
| Current Rating | 400 A |
| Number of Poles | 3 |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 250 VDC |
| Switch Type | Fusible |
| Operating Mechanism | External Manual ON/OFF Handle |
| 480 VAC 3-Phase HP Rating | 100 HP Standard / 250 HP Maximum |
| 600 VAC 3-Phase HP Rating | 125 HP Standard / 350 HP Maximum |
| 250 VDC HP Rating | 50 HP when two outside poles are used |
| Conductor Compatibility | Copper or Aluminum |
| Conductor Temperature Rating | 75°C |
| Fuse Configuration | 3 Fuse Positions |
| Installed Fuses | 3 Included as Pictured |
| Enclosure | Metal Enclosed Switch Assembly |
| Listing | UL Listed / CSA Marked |
| Country of Manufacture | USA |
Included: Square D QMB365W Series E1 branch switch assembly with three installed fuses, as pictured.
We warranty all items for 30 days from date of purchase.
