Square D 8501RSD42V51 General Purpose Relay Dpdt 12VDC

Product Description

The SQUARE D 8501RSD42V51 is an electromechanical plug-in general purpose relay rated for 10 amps at 240 volts AC with a 12 volt DC coil. It uses a double-pole double-throw (DPDT) contact form, giving it two independent switched circuits in a single compact body. The plug-in terminal type allows for fast, tool-free socket mounting in control panels, automation enclosures, and HVAC or refrigeration control circuits. Measuring 2 inches in length, 1.4 inches in width, and 1.3 inches in height, the relay fits standard relay sockets used in a wide range of light industrial and commercial applications. Weight is 0.09 pounds.

This relay is suited for residential and light commercial control applications where a low-voltage DC coil signal must switch a higher-voltage AC load. Typical install scenarios include HVAC control panels, refrigeration equipment, building automation systems, and general-purpose machine control enclosures. The DPDT configuration supports both normally open and normally closed circuit paths simultaneously, making it versatile for sequencing, switching, and interlock logic in electrical control systems.

Key Features

• 10 amp contact rating at 240 volts AC for reliable load switching
• 12 volt DC coil voltage for compatibility with low-voltage control circuits
• DPDT contact form provides two independent switched circuit paths
• Plug-in terminal type enables fast socket installation without tool modification
• Compact footprint: 2 inches x 1.4 inches x 1.3 inches
• Meets CE, CSA, RoHS, and UL Recognized standards

Compatibility

Designed as an OEM-style replacement plug-in general purpose relay for light industrial, commercial, and HVAC control panel applications requiring a DPDT 12 volt DC coil relay in a standard plug-in socket format.

Installation Notes

Installation is typically performed by a licensed electrician or qualified controls technician. De-energize and lock out the control panel before removing or installing the relay. Verify that the relay socket matches the 8501RSD42V51 pin configuration before seating the relay. Follow NEC guidelines for control circuit wiring and enclosure requirements.