Square D MD 3-Pole Motor Disconnect Switch, NEMA 4X Enclosure
The Square D MD Series motor disconnect switch is a three-pole (3P) switch built in a compact NEMA 4X enclosure rated for use in NEMA 1, 3, 3R, 4, 4X, and 12 applications. It is listed UL 508 Suitable for Motor Control (UL File E164864) and conforms to IEC standard 60947-3, making it a reliable choice for motor circuit disconnect duty across commercial and industrial equipment where dry, wet, or washdown-rated enclosure protection is required.
Key Features
- Three-Pole Configuration: 3P switch design suited to three-phase motor disconnect applications.
- Versatile Enclosure Rating: Compact NEMA 4X enclosure suitable for NEMA 1, 3, 3R, 4, 4X, and 12 applications, supporting indoor, outdoor, and washdown environments.
- UL 508 Listed: Listed Suitable for Motor Control under UL File E164864 for verified motor circuit disconnect performance.
- IEC 60947-3 Compliant: Conforms to the IEC 60947-3 low-voltage switchgear and disconnector standard for global specification compatibility.
- Horsepower Ratings: Maximum horsepower ratings of 7.5 hp at 220/240 V AC, 20 hp at 440/480 V AC, and 25 hp at 600 V AC.
- Accessory Compatible: Works with the MDS30P accessory and MDSAN11 / MDSAN20 auxiliary contacts for expanded control functionality.
Certifications & Compliance
- UL 508 Listed, Suitable for Motor Control (UL File E164864)
- IEC 60947-3 Compliant
- RoHS Eur Compliant
Technical Specifications
- Range Of Product: MD
- Device Type: LV equipment - LV switch - disconnector
- Warranty: 18 months
- Toxic Heavy Metal Free: Yes
- Mercury Free: Yes
- Country of Origin: Tunisia
Typical Applications
- Motor Control Centers and Industrial Machinery
- Three-Phase Motor Disconnect Applications
- Outdoor and Washdown Environments (NEMA 4X / NEMA 4)
- Commercial and Industrial Electrical Installations
- Panel Building and OEM Equipment
Why Square D?
Square D's MD Series motor disconnect switch pairs UL 508 motor control listing with IEC 60947-3 compliance in a compact, multi-rated NEMA enclosure, giving electricians, panel builders, and OEMs a dependable disconnect for demanding three-phase motor circuits. Backed by an 18-month warranty, it delivers the code-compliant performance professionals expect from Square D for industrial and commercial installations.
Manufacturer Resources
Product Specs
- Product Type:
- Disconnect Switch
- Series:
- MD
- Configuration:
- NEMA 4X Enclosure
- Standards:
- IEC 60947-3
- Listing:
- UL Listed
- Country of Origin:
- Tunisia
- Department:
- Electrical
- Product Group:
- Wiring Devices