Description
The Schneider Electric (Square D) 9999D10 is a normally open (N/O) auxiliary contact designed for use with Square D motor starters and contactors. This add-on auxiliary contact block expands the switching and control capabilities of compatible starter and contactor assemblies, making it an essential component in commercial and industrial HVAC control panels, motor control centers, and electrical distribution systems.
Product Overview
Auxiliary contacts are used to signal the status of a contactor or motor starter — providing feedback to control circuits, interlocking systems, or indicator lights. The 9999D10 installs directly onto compatible Square D devices, delivering a reliable normally open contact that closes when the main contactor or starter is energized.
Key Features
- Normally open (N/O) auxiliary contact configuration
- Designed for use with Square D motor starters and contactors
- Add-on block for expanded control and signaling capability
- Supports interlocking, status indication, and control circuit feedback
- Genuine Schneider Electric (Square D) replacement part
- Built for reliable performance in demanding commercial and industrial applications
Common Applications
- HVAC motor control panels and motor control centers (MCCs)
- Commercial and industrial contactor assemblies
- Control circuit interlocking and status signaling
- Indicator light and alarm circuit connections
- Building automation and electrical distribution systems
Why Choose Square D Auxiliary Contacts?
Square D, a brand of Schneider Electric, is a globally recognized leader in electrical distribution and motor control. The 9999D10 auxiliary contact is engineered to exact OEM specifications, ensuring seamless compatibility and long service life in critical HVAC and industrial control applications.
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