Overview
The ARD440S control relay is an industrial-grade, convertible-contact relay manufactured by Eaton under the Cutler-Hammer brand. This relay provides reliable switching for control circuits and general-purpose automation applications. The 4-pole configuration with 4 normally-open (4NO) contacts allows flexible wiring for load switching, interlock logic, and pilot circuits in motor control, HVAC, and process automation systems.
Key Features
- 4-pole, 4 normally-open (4NO) contact configuration for flexible control logic
- 120 VDC coil voltage for industrial DC control circuits
- Convertible-contact design allows reconfiguration of contact arrangement
- Compact, DIN-rail compatible industrial relay package
- Long operating life and proven reliability in general-purpose applications
Technical Specifications
- Part Number: ARD440S
- Manufacturer: Eaton (Cutler-Hammer)
- Relay Type: Industrial Control Relay, DC
- Coil Voltage: 120 VDC
- Contact Configuration: 4-pole, 4 normally-open (4NO)
- Contact Rating: General-purpose switching (load-dependent)
- Series: AR/ARD Convertible Contact
- Operating Temperature: -20°C to +60°C (typical industrial range)
Typical Applications
- Motor starter pilot circuits and load switching
- HVAC control and sequencing logic
- Interlock and safety circuits in industrial machinery
- Process automation and facility control systems
- Distributed relay banks and control panels
- PLC input/output extension and signal conditioning
Compatibility & Replacements
Compatible With
- 120 VDC control power supplies and batteries
- Industrial control panels and enclosures
- DIN-rail mounting systems
- General-purpose motor control circuits
- Factory automation and process control systems
Replaces / Drop-In Replacement For
The ARD440S is part of Eaton’s AR/ARD convertible-contact relay series. Verify compatibility with your system integrator before ordering to confirm contact configuration and coil voltage requirements match your application.
Works With
- DC control circuits (120 VDC primary)
- Manual and automatic motor starter circuits
- Industrial PLC input/output modules
- Distributed control and relay logic systems
- Safety interlocks and pilot circuits
