OONO 120V SPST Relay Module 20A — Pre-wired Polycarbonate Enclosure with LED and 1/2" NPT

OONO's AC 120V SPST relay module is a pre-wired, ready-to-mount switching device housed in a durable polycarbonate enclosure for controlling 20A loads at 250VAC or 30VDC.

This compact relay module combines a 120V AC control input with a single-pole single-throw (SPST) output rated for heavy loads, packaged in a weather-resistant polycarbonate case with a 1/2" NPT mounting nipple. It ships pre-wired to speed installation and includes a visible LED indicator so you can confirm operation at a glance. Designed for simple switching tasks in residential, light-commercial, and hobby electrical projects, it saves time and reduces wiring errors compared with building a relay circuit from individual components.

How does this relay module simplify installation?

The module arrives pre-wired and ready to connect, minimizing on-site wiring work and reducing installation time. Its polycarbonate enclosure has two screw mounts and a 1/2" NPT conduit nipple, allowing straightforward mounting to junction boxes or walls.

• Pre-wired leads for immediate hookup to control and load circuits.
• 1/2" NPT mounting nipple routes all wiring neatly through conduit.
• Two mounting holes for secure fastening to boards or walls.
• Included zinc alloy conduit locknut and mounting screws for convenience.

What electrical ratings and control requirements should I know?

The input side expects an AC 120V control signal drawing about 45mA, and the relay contact is a SPST switch capable of handling 20 amps at mains voltages. Use it for switching AC or DC loads within the specified ratings, and ensure downstream wiring and devices are rated accordingly.

• Control input: AC 120V, nominal 45mA coil current.
• Contact rating: 20A at 250VAC for typical mains loads.
• Also rated: 20A at 30VDC for DC switching applications.
• Simple ON/OFF switching through the single pole single throw configuration.

Where and how can I mount and protect the relay module?

The polycarbonate enclosure offers durability for indoor and sheltered outdoor locations when installed properly. Cabling exits through the NPT nipple so you can use conduit for extra protection, and the unit’s compact footprint fits common junction and outlet boxes.

• Polycarbonate housing resists impacts and environmental wear.
• 1/2" NPT conduit nipple keeps wiring enclosed and tidy.
• Use included locknut to secure the nipple to conduit or box walls.
• Two screw holes allow fixed attachment to surfaces or panels.

What comes in the box and what should I prepare before installation?

The package contains the relay module and a small hardware set so you can mount and secure the assembly quickly. Confirm compatibility with the control voltage and prepare proper gauge wiring and protective devices for the switched load.

• Included: 1x relay module, 1x NPT 1/2" zinc alloy conduit locknut.
• Included: 2x M3 x 50mm mounting screws for secure attachment.
• Recommended: use wire rated for 20A and appropriate overcurrent protection.
• Check local electrical codes and use proper strain relief with conduit.

Who is this for: This OONO relay module is intended for electricians, installers, maintenance technicians, makers, and experienced DIYers who need a compact, reliable SPST switching solution for lighting, motors, pumps, or control circuits. It suits applications that require a mains-level control input and a rugged, pre-wired relay in a mountable enclosure—ideal when you want a fast, low-cost installation with visible status indication and conduit-ready wiring.