Description
The Schneider Electric (Square D) 9999D11 is a factory-rated auxiliary contact block designed to expand the switching capability of compatible Square D motor starters and contactors. Featuring one normally open (N/O) and one normally closed (N/C) contact configuration, this auxiliary contact provides reliable control circuit switching for a wide range of HVAC, industrial, and commercial applications.
Product Overview
Auxiliary contacts are essential add-on components that mount directly to motor starters and contactors, enabling additional control circuit functions such as interlocking, signaling, and status indication. The 9999D11 is a genuine Square D replacement and upgrade part, engineered to meet the demanding requirements of motor control centers, packaged HVAC equipment, and building automation systems.
Key Features
- 1 Normally Open (N/O) contact for energized-state switching
- 1 Normally Closed (N/C) contact for de-energized-state switching
- Designed for direct mounting on Square D Class 9000 motor starters and compatible contactors
- Genuine Schneider Electric (Square D) OEM component for assured compatibility and reliability
- Compact design for easy field installation without special tools
- Suitable for control circuit interlocking, status indication, and auxiliary switching applications
- Built to withstand the electrical and mechanical demands of HVAC motor control environments
Typical Applications
- HVAC motor starters and contactor panels
- Building automation and control systems
- Commercial refrigeration and chiller control panels
- Industrial motor control centers (MCCs)
- Fan, pump, and compressor motor control circuits
Why Choose the Square D 9999D11?
As a genuine Schneider Electric replacement part, the 9999D11 ensures full compatibility with Square D Class 9000 series starters, maintaining the integrity of your motor control system. Its dual-contact configuration (N/O + N/C) provides maximum flexibility for control circuit design, making it an ideal solution for both new installations and field retrofits.
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