Square D MD Auxiliary Contact Module, 1NO/1NC

Square D MD Auxiliary Contact Module, 1NO/1NC

The Square D MD auxiliary contact module adds a 1 N/O + 1 N/C auxiliary contact to MD-series motor disconnect switches such as the MD3304X and MD3604X, giving control panels and OEM assemblies a reliable signal for interlocking, indication, or remote monitoring. It is housed in a compact, water-tight NEMA 4X enclosure suitable for NEMA 1, 3, 3R, 4, 4X, and 12 applications, and it is UL 508 Listed as Suitable for Motor Control (UL File E164864) while conforming to IEC 60947-3. Built for commercial and industrial motor control work, this module is designed to install cleanly alongside compatible MD disconnect switches without added enclosure bulk.

Key Features

• Contact Configuration: 1 N/O + 1 N/C auxiliary contact arrangement for interlocking, signaling, or remote status indication.
• Compatible Fit: Designed for use with Square D MD-series motor disconnect switches, including the MD3304X and MD3604X.
• Enclosure Rating: Water-tight NEMA 4X construction, suitable for NEMA 1, 3, 3R, 4, 4X, and 12 applications.
• Standards Compliance: UL 508 Listed, Suitable for Motor Control (UL File E164864), and conforms to IEC 60947-3.
• Horsepower Rated: Sized for horsepower-rated motor disconnect applications.
• Lockout/Tagout Ready: OSHA lockout/tagout compatible for safe maintenance procedures.
• Compact Design: Covers additional enclosure types without increasing overall footprint.

Certifications & Compliance

• UL 508 Listed, Suitable for Motor Control (UL File E164864)
• cULus Listed
• Conforms to IEC 60947-3
• NEMA 1, 3, 3R, 4, 4X, and 12 rated enclosure
• RoHS EUR compliant (in scope)

Technical Specifications

• Range Of Product: MD
• Product Or Component Type: Auxiliary Contact Module
• B2B Bullet Point 1: Water-tight NEMA 4X
• Warranty Period: 18 months
• Returnability: Yes
• Toxic Heavy Metal Free: Yes
• Mercury Free: Yes
• ROHS Eur In Scope: Yes
• ROHS Exemption Information: Yes
• Reach Free Of Svhc: Yes
• China ROHS Label: 1
• Sustainable Packaging: No
• Packaging Made With Recycled Cardboard: Yes
• Recycled Metal Content At Cr Level: 0 %

Typical Applications

• Motor Control Centers and Disconnect Panels
• OEM Control Panel Building
• Industrial Motor Disconnect Switch Retrofits
• Interlocking and Auxiliary Signaling Circuits
• Commercial and Industrial Electrical Installations

Why Square D?

Square D engineers the MD auxiliary contact module to the same UL 508 and IEC 60947-3 standards as its motor disconnect switches, so control panel builders and electricians can add auxiliary signaling without compromising the water-tight NEMA 4X protection of the enclosure. With cULus listing and OSHA lockout/tagout compatibility built in, this module supports code-compliant, dependable performance for professional motor control installations.