Square D 8501CDO16V51 General Purpose Relay Dpdt 12 Vdc

Product Description

The SQUARE D 8501CDO16V51 is a double-pole double-throw (DPDT) electromechanical general purpose relay rated for 12 VDC coil operation. Designed for control circuit switching in industrial and commercial applications, this relay handles up to 1-1/2 horsepower and carries a 10 VA power rating. Contacts are rated at 40 amps at 277 VAC and 5 amps at 600 V, making it suitable for a range of load types. The screw clamp terminal design provides secure, vibration-resistant connections. Electricians and controls technicians install this relay in panel assemblies, motor control circuits, and automated switching systems where reliable DPDT switching is required.

This relay is suited for use in residential, commercial, and light industrial control panels. It fits standard DIN-rail or panel-mount enclosures and is commonly installed in HVAC control systems, motor starters, and building automation panels. The compact footprint — 2.6 inches wide, 2.5 inches high, and 3.2 inches deep — makes it practical for dense panel layouts where space is limited. Licensed electricians typically handle installation in line-voltage or mixed-voltage control applications.

Key Features

• DPDT contact form supports two independent switched circuits from a single coil
• 12 VDC coil voltage for low-voltage control circuit integration
• Screw clamp terminals for secure, tool-assisted wire termination
• Contact rating of 40 amps at 277 VAC and 5 amps at 600 V
• RoHS compliant and UL Listed (File E78351); CSA certified (File 218139 Class 3211 04); meets IEC 60947-4-1
• Compact dimensions suit high-density panel installations

Compatibility

Designed as an OEM-style replacement general purpose relay for use in standard industrial and commercial control panel assemblies requiring a DPDT, 12 VDC coil relay with screw clamp termination.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the NEC and applicable local codes. De-energize and lock out all circuits before handling or replacing the relay. Verify coil voltage supply matches the 12 VDC rating before energizing. Screw clamp terminals require a flathead or terminal screwdriver for proper torque; do not over-tighten terminal screws beyond the hardware manufacturer guidance marked on the device.