Menu
Log in

We may earn a small commission from purchases made through our trusted partner and affiliate links, at no extra cost to you. Learn more ›

Relays

Discover reliable industrial relays for electrical controls, including general purpose, automotive, high-power, and specialized models from brands like Omron, Nilight, and Honeywell.

97 products 21 subcategories

Select a Product

Click on a product from the list to view its details.

PRIME

ProductReviews.org score rating is a scoring system developed by our experts. The score is from 0 to 10 based on the data collected by the ProductReviews.org tool. This score doesn't impact from any manufacturer or sales agent websites. We encourage you to write a review of your experiences with these products. Learn more »
Last update on . Affiliate links, prices, images, product titles, and highlights from Amazon Product Advertising API.
View on Amazon

Detailed Review

Pros

Cons

Key Features

User Reviews

Your review will be visible after approval.

Loading reviews...
VAMRONE MY5NJ Electromagnetic Power Relay 8-Pin 24V DC 10A DPDT with Socket, LED Indicator & DIN Rail - 2 Pack

This VAMRONE MY5NJ pack includes two 8-pin electromagnetic power relays with 24V DC coils, 10A DPDT contacts, socket bases, and DIN rail compatibility. Its LED and mechanical indicators provide clear status visibility, making it ideal for industrial automation, HVAC, and automotive engineers.

  • Switch heavy loads effortlessly with 10A capacity for motors, pumps, and compressors
  • Instant status checks via LED signal and red mechanical indicator to minimize downtime
  • Seamless DIN rail mounting with socket base for quick industrial installations
  • Versatile DPDT configuration (2NO 2NC) handles complex control circuits reliably
  • Energize coils confidently with clear AC/DC detection and visual feedback

Precise visual indicators (LED and mechanical) for easy troubleshooting. DIN rail socket simplifies secure, professional installations. High 10A rating supports demanding applications like air conditioners and fans.

Limited to 24V DC coils, not interchangeable with other voltages. Requires electrical knowledge for safe wiring and setup. Socket mounting may need additional DIN rail hardware.

GODIYMODULES Voltage Monitor Module DC 0-99.9V Relay Controller - Over/Under Voltage Protector & Detection Board

This GODIYMODULES voltage monitor module detects DC 0-99.9V with ±0.1V accuracy and controls a relay for over/under voltage protection. Battery users and DC power system builders should buy it for reliable automatic safeguarding.

  • Real-time digital display ensures instant voltage visibility for proactive monitoring
  • Automatic relay triggers protect batteries and circuits from damaging over/under voltage
  • Wide 6-80V operating range fits most DC systems like solar or automotive setups
  • Simple button adjustments with power-off memory save time on repeated setups
  • High-durability relay handles 30A loads reliably for heavy-duty applications

Precise ±0.1V detection accuracy. Versatile NO/NC relay contacts for flexible wiring. Broad -40 to 85°C temperature tolerance.

Operating power limited to DC 80V max. DC loads over 50V restricted to under 10A. Inductive loads require current derating to 1/4.

Solidremote KIT-1 Secure 2-Channel Wireless RF Relay Receiver Kit - Rolling Code, 12-24V for Garage Doors, LED Lights, Motors

The Solidremote KIT-1 is a complete 2-channel wireless RF receiver kit with two transmitters, featuring rolling code security and high-sensitivity superheterodyne module for reliable control. Its flexible relay modes and wide voltage compatibility suit DIY users with basic electronics knowledge for garage doors, lights, and small motors.

  • Ultimate security with over 18 quintillion rolling codes to protect against unauthorized access
  • Superior long-range performance from -113dBm sensitivity superheterodyne RF module
  • Flexible 2-channel relays for independent control or motor polarity reversing
  • Easy setup with DIP switches, visual LED feedback, and simple programming
  • Wide 12-24V AC/DC power input for versatile installations

Exceptional code security vastly outperforming fixed or learning codes. Stable, extended range without excessive transmit power. True independent channel programming for multi-device control.

Requires basic electronics knowledge and possible soldering for wiring. Incompatible with Homelink or newer garage doors with yellow learn buttons. Advanced features like timed output may need video tutorials for first-time users.

Standard Motor Products RY-1562 Circuit Opening Relay - Reliable OEM Replacement for Automotive Vehicles

The Standard Motor Products RY-1562 is a circuit opening relay serving as a replacement part for motor vehicles. Its standout reliability from a 1919-established manufacturer makes it ideal for automotive aftermarket repairs.

  • Ensures precise circuit opening for safer vehicle electrical performance
  • OEM-quality replacement from a century-old trusted manufacturer
  • Durable construction extends relay lifespan and reduces downtime
  • Seamless fit minimizes installation time for DIY mechanics
  • Boosts overall electrical system reliability in daily drivers

Reliable operation from established brand. Exact replacement fit for various vehicles. High customer satisfaction in reviews.

Manufactured in China. Bulkier package dimensions. Heavier shipping weight.

DIANN 30A 4-Channel 12V Relay Module with Optocoupler Isolation - High/Low Trigger for PLC Automation & Industrial Control

This DIANN 30A 4-channel relay module operates on 12V DC with optocoupler isolation and high/low level triggering for safe, reliable control. Its standout high-power handling makes it perfect for PLC automation, industrial systems, and electronics projects.

  • Switch high-power loads up to 30A DC 30V/AC 250V effortlessly for demanding industrial setups
  • Optocoupler isolation protects sensitive controls while LED indicators show real-time status
  • Jumper-selectable high/low triggering simplifies setup for PLC and automation projects
  • Terminal block connections enable quick wiring and easy debugging in any environment
  • Versatile for IoT, electronics experiments, and professional industrial control needs

High 30A capacity handles heavy loads reliably. Optocoupler isolation enhances safety and noise immunity. User-friendly jumpers and LEDs for easy operation.

Requires stable 12V DC power supply matching relay voltage. Maximum ratings demand proper wiring to avoid overload. No integrated power supply for standalone use.

eWeLink WiFi Smart Relay Module 1CH USB 5V/DC 7-48V Inching Self-Lock Switch - Alexa Google Home Remote Control for Access PC Power

This eWeLink WiFi smart relay module provides app-based remote ON/OFF control with inching, self-locking, and interlocking modes for devices up to 10A. It's perfect for DIY smart home users automating access control, PC power-ons, or motors via Alexa or Google Home.

  • Control appliances remotely via eWeLink app from anywhere
  • Voice-activated with Alexa, Google Home, and IFTTT for hands-free operation
  • Versatile USB 5V or DC 7-48V input powers diverse DIY projects
  • Inching mode automates timed pulses from 500ms to 1 hour
  • Self-locking for simple on/off switching and interlock for motors

Wide voltage compatibility simplifies installations. Compact design fits easily in tight spaces. Supports multiple control methods including app and remotes.

Requires 2.4GHz WiFi only, needs router SSID split for dual-band. Dry contact output demands separate load power supply. Limited to low-voltage input for board power.

Emerson 90-112 Fan Control Center: Transformer Relay Combo with DPDT Switch, Pre-Wired for Easy HVAC Install

The Emerson 90-112 Fan Control Center is a transformer and relay combination that mounts easily on a 4x4 junction box for HVAC fan control. Its pre-wired connections and DPDT switch action make it ideal for HVAC technicians needing quick, reliable setups.

  • Simplifies HVAC fan control with all-in-one transformer and relay design
  • Mounts effortlessly on standard 4x4 junction boxes for fast installs
  • DPDT switch delivers precise, dependable switching action
  • Pre-wired line voltage connections speed up setup and reduce errors
  • Color-coded, pre-stripped leads make wiring intuitive and error-free

Easy installation on 4x4 junction boxes. Pre-wired for quick line voltage hookup. Color-coded leads simplify wiring process.

Designed specifically for 4x4 junction boxes only. Requires 120VAC primary input, not universal voltages. Professional HVAC knowledge recommended for safe installation.

JESSINIE LCUS-1 USB Relay Module 5V 10A Single Channel Smart Switch - Plug & Play Overcurrent Protection for Home Automation DIY

The JESSINIE LCUS-1 is a compact USB relay module that enables PC-controlled switching of 10A devices via simple serial hex commands. Its plug-and-play CH340 chip, overcurrent protection, and 100,000-cycle relay lifespan make it perfect for DIY smart home automation and electronics hobbyists.

  • Control high-power appliances effortlessly from your PC with simple USB serial commands
  • Plug-and-play setup on Windows/macOS—no drivers needed for instant use
  • Safeguard your projects with built-in overcurrent and freewheeling diode protection
  • Handle demanding loads up to 10A/250VAC with a relay rated for 100,000 cycles
  • Monitor status easily via onboard power and relay LED indicators

True plug-and-play with CH340 chip on modern OS. Robust safety features prevent damage to module and devices. High-capacity 10A relay supports versatile applications.

Single-channel design limits to one relay control. Requires basic serial software knowledge for commands. USB-only control—no wireless or app integration.

DieseRC 4-Channel WiFi Smart Relay Switch Module - DC 5-48V Passive Dry Contacts, eWeLink App, Alexa/Google Home, Toggle/Inching Modes

This DieseRC 4-channel WiFi and Bluetooth smart relay module delivers passive dry contact outputs up to 10A across DC 5V or 7-48V/AC 7-32V power supplies. Its seamless eWeLink app integration, voice control with Alexa/Google Home, and versatile modes make it perfect for DIY automation of lights, motors, garage doors, and pumps.

  • Control devices remotely from anywhere using the eWeLink app for ultimate convenience
  • Voice-activated commands via Alexa or Google Home simplify smart home operation
  • Versatile DC 5V/7-48V or AC 7-32V inputs power diverse automation projects
  • Four independent 10A relays handle multiple devices like lights, motors, and locks simultaneously
  • Switch between toggle, inching, and self-locking modes to match any application

Broad smart ecosystem compatibility including eWeLink, Alexa, and Google Home. Reliable passive dry contacts ensure clean, safe control of high-power loads. Multiple operation modes adapt to switches, buttons, or pulses effortlessly.

Requires 2.4GHz WiFi network only, no 5GHz support. Bluetooth remote control not included in package. Initial app pairing may need user manual reference for optimal setup.

WOODGUILIN 12V Wireless Remote Control Relay Switch - 10A Dry Contact, 328ft Range for Lights, Garage Doors, Motors, Fans

The WOODGUILIN 12V remote control relay switch is a compact dry contact device with 10A capacity and 328ft range for wireless control of lights, motors, garage doors, and fans. DIY users and homeowners needing versatile DC/AC control from 1-220V should buy it for its strong signal and dual power inputs.

  • Control appliances wirelessly up to 328ft through walls with reliable RF signal
  • Adapt to 5-48V input and 1-220V DC/AC output for broad household and DIY compatibility
  • Dual power inputs enable seamless backup switching during outages
  • Compact thumb-sized design hides easily in tight spaces like ceilings
  • Dry contact separation keeps power and output circuits safe and independent

Exceptional 100m range with anti-interference 433MHz technology. Highly adaptable voltage range suits most appliances without modification. Two-way control circuit unlocks creative DIY scenarios.

Requires connecting live and neutral wires, demanding careful installation. Emits normal ticking sound during relay activation. Mode changes from preset self-locking may confuse non-experts.

Welcome to our comprehensive guide on Relays in the Industrial & Scientific section. These essential components act as switches in electrical circuits, allowing low-power signals to control high-power devices safely and efficiently. Whether you're outfitting industrial automation setups, automotive repairs, or HVAC systems, our selection of relays ensures reliable performance under demanding conditions.

Understanding Relays and Their Role in Industrial Electrical Systems

Relays are electromechanical or solid-state devices that bridge the gap between control circuits and load circuits. Found within the Industrial Electrical category under Controls & Indicators, they protect equipment, enable remote operation, and enhance safety. This category features eight standout products tailored for diverse applications, from general-purpose industrial use to specialized automotive and IoT integrations.

Key Types of Relays Available

Our relays span multiple configurations to match your needs:

  • General Purpose Relays: Like the Omron G7L-2A-BUBJ-CB-DC24, ideal for double pole single throw operations with test buttons and screw terminals for easy integration in machinery.
  • Automotive Relays: High-amp options such as irhapsody 12V 5-pin relays and multiple Nilight kits (30A/40A fused, waterproof SPDT), perfect for cars, trucks, RVs, and power trim systems. For automotive enthusiasts, explore Nilight's robust lineup, including their dedicated Nilight Relays collection.
  • High-Power and IoT Relays: Enclosed models from Digital Loggers for Arduino, Raspberry Pi, or WiFi projects, handling heavy loads automatically.
  • Specialized Relays: Dorman's diesel glow plug relay for Ford models and Honeywell's high-limit aquastat relay for HVAC with extended capillary sensing.

These relays fit seamlessly into broader Industrial & Scientific applications, offering versatility across sectors.

What to Look for When Buying Industrial Relays

Selecting the right relay maximizes reliability and longevity. Consider these critical factors:

  • Contact Rating (AMP/Voltage): Ensure it handles your load—e.g., 30/40A for automotive, higher for industrial.
  • Pin Configuration: 4-pin SPST for simple circuits, 5-pin SPDT for versatile switching.
  • Environmental Protection: Waterproof harnesses like Nilight's 12 AWG tinned copper sets for harsh conditions.
  • Mounting and Insulation: Upper bracket or socket holders; Class B insulation for heat resistance.
  • Additional Features: Test buttons, fuses, interlocking sockets, or automatic operation for IoT.

Brands like Dorman Products excel in vehicle-specific compatibility, while Honeywell Air Comfort delivers precision for temperature controls.

Common Use Cases for These Relays

Relays power a wide array of projects:

  • Industrial Automation: Omron relays switch motors and solenoids reliably.
  • Automotive and Marine: Nilight and irhapsody handle lighting, fuel pumps, and tilt systems.
  • IoT and DIY Electronics: Digital Loggers' shielded relays integrate with microcontrollers.
  • HVAC and Engine Management: Honeywell aquastats prevent overheating; Dorman glow plugs aid cold starts.

By choosing the appropriate relay, you minimize downtime and enhance system safety.

Frequently Asked Questions

What is the difference between SPST and SPDT relays?

SPST (Single Pole Single Throw) relays have one switch for basic on/off control, like Nilight's 4-pin fused kits. SPDT (Single Pole Double Throw) offers two positions for routing signals, common in 5-pin automotive relays for added flexibility.

How do I choose the right relay for my voltage and current needs?

Match the coil voltage (e.g., 12V DC, 24V DC) to your control circuit and contact rating to the load. Always factor in a safety margin, such as 20-30% above expected amps.

Are these relays suitable for outdoor or harsh environments?

Yes, many like Nilight's waterproof 40/30A sets with tinned wires are designed for automotive and marine exposure, featuring IP67 ratings and heavy-duty construction.

Can relays be used in IoT projects?

Absolutely—the enclosed high-power relay from Digital Loggers pairs perfectly with Arduino or Raspberry Pi for automated switching via WiFi or direct control.

What maintenance do industrial relays require?

Regular inspection for contact wear, secure mounting, and clean terminals extends life. Opt for models with test buttons like Omron for easy diagnostics.

Equip your electrical systems with confidence—browse our relays today for unmatched control and durability.

Related Categories
Industrial Switches 102