Overview
The Square D 8501-DO-44 is a general-purpose AC pilot duty relay designed for reliable electrical circuit control in industrial and commercial applications. This relay is rated for 10 amperes at 600 volts AC, making it suitable for a wide range of switching applications in control systems. As a used unit, this relay offers an economical solution for maintenance and replacement needs.
Key Features
- AC Pilot Duty Rating: Optimized for light-load switching applications
- Contact Configuration: Plug-in relay type with modular design for easy maintenance
- Wide Voltage Range: Operates across standard industrial voltage levels
- Industry Standard: Meets UL and CSA certification requirements for electrical control equipment
- Proven Reliability: Square D 8501 series trusted in thousands of industrial installations
Technical Specifications
- Contact Rating: 10A @ 600VAC
- Relay Type: AC Pilot Duty, General Purpose
- Control Circuit: AC voltage coil (voltage code varies by model suffix)
- Operating Temperature: -45°C to +70°C (-49°F to +158°F)
- Response Time: Typical pickup 13ms, dropout 6ms maximum
- Construction: Plug-in with standard terminal arrangements
- Certifications: UL Listed, CSA Approved, CE Marked
- Coil Power: Per voltage code designation (standard codes: 120VAC, 240VAC options)
Typical Applications
The 8501-DO-44 relay is used in numerous industrial automation and control scenarios:
- Motor control circuits and starter circuits
- Electrical interlocking systems
- Pilot duty and control signal switching
- General-purpose circuit control in control panels
- Industrial machinery and equipment control systems
- HVAC and building automation systems
Compatibility & Replacements
Compatible With
- Square D 8501 series relay sockets (Type NR and compatible holders)
- Standard DIN-rail and panel-mounted control systems
- Industrial control panels using 600VAC, 10A circuits
- Legacy and modern industrial electrical systems
Replaces / Drop-In Replacement For
The 8501-DO-44 is compatible with other Class 8501 Type K general-purpose relays requiring the same electrical specifications. Verify coil voltage and contact configuration with your system documentation before installation.
Works With
- Square D control panels and distribution systems
- Industrial PLC and automation systems requiring auxiliary relay logic
- Motor starters and soft-start control circuits
- Standard 50/60 Hz AC power systems
- Facility wiring to UL 508 industrial control standards
