Description
The Schneider Electric (Square D) 9999D01 is a 20/90A rated, normally closed (N/C) auxiliary contact designed to expand the switching and monitoring capabilities of compatible Square D motor starters and contactors. A trusted component in commercial and industrial HVAC electrical systems, this auxiliary contact provides reliable circuit status feedback, interlock wiring, and control circuit functionality.
Product Overview
Auxiliary contacts are essential add-on components that work alongside main contactors and motor starters to provide additional control circuit switching. The 9999D01’s normally closed (N/C) configuration opens when the contactor energizes, making it ideal for interlock, alarm, and status-monitoring applications in HVAC equipment, air handling units, pumps, and other motor-driven systems.
Key Features
- Ampere rating: 20/90A for broad compatibility across control and power circuits
- Contact configuration: 1 N/C (Normally Closed) for interlock and status monitoring
- Designed for use with Square D / Schneider Electric motor starters and contactors
- Expands switching capacity without replacing the base contactor
- Compact, add-on design for straightforward field installation
- Manufactured by Schneider Electric, a globally recognized leader in electrical components
Common Applications
- HVAC motor starters and definite purpose contactors
- Air handling units and rooftop equipment control panels
- Pump and fan motor control circuits
- Interlock and alarm wiring in commercial building automation systems
- Industrial and light commercial electrical panels
Why Choose Square D Auxiliary Contacts?
Square D by Schneider Electric is synonymous with quality and reliability in electrical distribution and motor control. The 9999D01 auxiliary contact is engineered to meet the demanding requirements of HVAC and industrial applications, ensuring long service life and dependable circuit performance. Stocking genuine OEM auxiliary contacts helps technicians maintain system integrity and avoid costly downtime.
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