Square D™ MD Enclosed Motor
Disconnect Switch
Schneider Electric’s Square D brand has been an industry leader in safety
switches for over 100 years and is recognized as the market leader in product
quality, durability and reliability. The latest addition to the MD motor disconnect
family is a non-receptacle switch for UL 508 listed applications.
This MD motor disconnect switch serves as a local on/off switch for a motor
when the motor branch circuit protection is in a central enclosure. It is in a
compact NEMA 4X enclosure and is available in 30 A and 60 A versions.
Key Benefits
• Lower costs
– Signicantly less expensive than stainless steel motor disconnect switches
• Enhance safety
– Handle interlock prevents cover from being removed while
in the “ON” position
• Maximize space
– One of smallest footprints on the market
Key Features
• Water-tight NEMA 4X polycarbonate enclosure
– Ideal for use in wash down or rugged industrial applications
– Covers additional enclosure types, such as NEMA 1, 12, 3R and 4
• Standard 3-pole design
– Optional additional power pole
• Available in 30 A and 60 A sizes
• Horsepower rated
• Clear “ON/OFF” indication
• Front padlockable handle complies with OSHA lockout/tagout requirements
– Accepts up to three 8 mm padlocks
• cULus certied
– UL File E164864
Increase safety and maximize space
Schneider Electric USA, Inc.
1415 S. Roselle Road
Palatine, IL 60067
Tel: 847-397-2600
Fax: 847-925-7500
www.schneider-electric.us
Document Number 3150HO1001R11/10
Square D MD Enclosed Motor Disconnect Switch
NEMA 4X Enclosed Switches
Listed Maximum Horsepower Ratings Catalog Number
Three-phase
220-240 VAC 440-480 VAC 600 VAC
UL 508 7.5 20 25 MD3304X
UL 508 20 40 40 MD3604X
30 A Enclosed Switch
Mounting Diagram
60 A Enclosed Switch
Mounting Diagram
Put Our Expertise to Work for You
For more information on Square D brand enclosed switches, visit us online at
www.Schneider-Electric.us or talk to one of our experts at 1-888-778-2733.
Accessories
Description Catalog Number
2 normally open auxiliary contact module MDSAN20
1 normally open + 1 normally closed auxiliary contact module MDSAN11
Additional power pole – 30 A MDS30P
March 2011 sf
© 2011 Schneider Electric. All Rights Reserved. Square D is a trademark or registered trademark of Schneider Electric and/or its
affiliates in the United States and/or other countries. Other marks used herein may be the property of their respective owners.