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 ›

Best Ac Relays

Discover high-quality AC relays for industrial electrical systems, HVAC, automotive, and more. Reliable electromagnetic power relays with LED indicators, sockets, and DIN rail compatibility for efficient control.

35 products 19 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...
JAMHER NT90-AC120V-10X Power Relay AC 120V Coil 40A SPDT Mini Relay Flange Mount - Shock Resistant for Motors & Appliances

The JAMHER NT90-AC120V-10X is a compact mini power relay with AC 120V coil and 40A SPDT contacts for switching high loads. Its low power consumption and strong shock resistance make it perfect for DIYers and technicians working on motors, compressors, and HVAC systems.

  • Switch high loads up to 40A effortlessly for motors and compressors
  • Low power coil saves energy in continuous operation
  • Shock and vibration resistant for reliable performance in harsh environments
  • Epoxy sealed for immediate use and protection against dust/moisture
  • Flange mounting simplifies secure installation on panels or boards

High 40A capacity handles demanding applications. Strong anti-vibration build ensures longevity. Easy plug-in or solder mounting speeds up projects.

AC 120V coil limits use to specific voltage systems. Requires power-off precautions during installation. Mini size may not suit extremely heavy-duty industrial needs.

Dreyoo 24V 40A 2-Pole HVAC Contactor UL Certified - Air Conditioner Relay Replacement for Heat Pumps & Refrigeration

This Dreyoo 24V coil 2-pole contactor handles 40A FLA and 50A resistive loads in HVAC systems with UL certification and dust-resistant design. HVAC technicians and facility managers should buy it for reliable replacements in air conditioners, heat pumps, and industrial refrigeration.

  • Delivers rock-solid 40A performance with UL certification for safe, worry-free HVAC operation
  • Dust-proof compact design withstands harsh environments from -40°F to 221°F
  • Hermetically sealed coil prevents moisture damage for 100,000+ cycles of reliability
  • Plug-and-play compatibility with Mars 17421, Siemens 45GG20AJ, and Cutler-Hammer models
  • Versatile for elevators, pumps, refrigeration, and agriculture with quick 0.15s response

Exceptional durability in extreme temperatures and high humidity. Low resistance silver oxide contacts minimize voltage drop. Broad compatibility across major HVAC brands and systems.

Requires 24V AC control voltage, not compatible with DC systems. Professional installation recommended for optimal safety. 2-pole design best suited for specific single-phase applications.

2-Pack 24V SPST Fan Relay AC Switch for HVAC Coleman Furnace Goodman Blower - 90-380 Isolation Relay Control

This 2-pack of 24V SPST isolation relays controls fans in HVAC systems, Coleman furnaces, Goodman blowers, and humidifiers. Their premium metal construction ensures durability and reliable performance for HVAC technicians and DIY users.

  • Effortless integration with HVAC, furnaces, blowers, and humidifiers for seamless fan control
  • Precise low-voltage activation safeguards circuits and ensures smooth HVAC operation
  • Premium metal build resists corrosion and wear for extended lifespan
  • Simple installation with printed wiring diagram and six terminals for quick setup
  • Quiet, efficient performance meets demanding HVAC requirements

Broad compatibility with major HVAC brands like Coleman and Goodman. High mechanical endurance of 1 million operations. Compact design simplifies access in tight spaces.

No installation instructions included. Professional installation recommended for safety. Requires knowledge of proper wiring standards.

Yourkar 4PCS G8HL-H71 12VDC 4-Pin AC Starter Relays for Honda Civic Accord CR-V Acura - Brass Contacts, Plug-in Replacement

Yourkar G8HL-H71-12VDC relays are a 4-pack of 12V 25A 4-pin units for controlling AC, fans, starters, and lights in 2003-2014 Honda and Acura models. Brass contacts provide corrosion resistance and reliable high-current performance, ideal for owners needing quick plug-in replacements.

  • Seamlessly controls AC, fans, starters, and lights for uninterrupted vehicle operation
  • Corrosion-resistant brass contacts ensure long-lasting secure connections
  • Fast precise response handles 25A loads reliably in demanding conditions
  • Compact 0.87-inch design enables effortless plug-in installation without tools
  • Perfect fit for 2003-2014 Honda Accord, Civic, CR-V and Acura models

High-quality brass for superior conductivity and durability. Easy plug-in setup simplifies DIY replacements. Broad compatibility across multiple Honda and Acura vehicles.

Serial numbers vary by production batch. Requires basic wiring knowledge for installation. Model-specific fitment limits universal use.

HOPUT 4-Pin AC Relay Pack of 4, 90987-02027 90080-87026 Compatible Toyota Lexus Camry, 12V Plug & Play Replacement

This HOPUT pack of four 4-pin 12V AC relays serves as a direct OEM replacement (90987-02027) for Toyota, Lexus, and Camry vehicles, fixing issues in AC compressors, lights, fans, and starters. Its plug-and-play design and 100% testing ensure easy installation and reliable performance for vehicle owners.

  • Quickly resolves AC compressor failures and other electrical issues in Toyota vehicles
  • Plug-and-play setup installs in under 20 minutes without special tools
  • High-grade terminals and durable plastic housing withstand daily vehicle demands
  • 100% tested for safety and reliability before shipping
  • Versatile for lights, fans, starters, and air conditioners—stock up with a 4-pack

Effortless plug-and-play installation. Precise OEM compatibility for Toyota, Lexus, and Camry. Multi-purpose use across vehicle electrical components.

Compatibility must be verified by year, make, and model. Limited to 12V systems only. Pack of four may exceed needs for single-replacement jobs.

HYXUAN 5 Pack G8HL-H71 AC Power Relay for Honda Accord Civic CR-V Odyssey & Acura MDX TL TSX - OE 39794-SDA-A05 Replacement

This HYXUAN 5-pack G8HL-H71 AC relay assembly fits 2003-2014 Honda Accord, Civic, CR-V, Odyssey and select Acura models like MDX and TL. Its broad compatibility and OE reference numbers ensure reliable replacement for A/C compressors, fans, and accessories, ideal for Honda/Acura owners needing multiple spares.

  • Restore A/C compressor and fan motor performance instantly with plug-and-play fit
  • Powers headlights, horns, fuel pumps, and blowers for dependable vehicle operation
  • Bulk 5-pack delivers cost savings for multiple repairs or spares
  • Direct OE match (39794-SDA-A05, G8HL-H71) ensures seamless compatibility
  • Supports wide Honda/Acura range including 2003-2014 Accord, Civic, CR-V, Odyssey, MDX

Extensive model compatibility across Honda and Acura vehicles. Precise OE reference for accurate replacements. Convenient 5-pack for workshops or frequent maintenance.

Requires verifying OE numbers and photos for exact fit. Aftermarket part may have slight variations from OEM. Limited to specific 2003-2014 model years.

EPLZON NT90-AC220-10X AC 220V 30A SPDT Power Relay Pack of 2 with Flange Mount & Quick Connect Terminals

The EPLZON NT90-AC220-10X is a pack of two AC 220V coil power relays rated at 30A SPDT with flange mounting and included 18 AWG quick connect terminals. Its low power consumption, large contact load, and strong resistance to shock and vibration make it ideal for DIY enthusiasts and professionals handling motors, compressors, and appliances.

  • Switch heavy 30A loads reliably with SPDT (1NO 1NC) contacts for versatile control
  • Low power coil consumption extends energy efficiency in continuous applications
  • Shock and vibration resistant design ensures durability in motors and compressors
  • Flange mounting and quick connect terminals enable fast, hassle-free installation
  • Compact 50x27x28mm size fits easily in tight spaces like air conditioners or fans

High 30A rating handles demanding loads like table saws and refrigerators. Strong anti-vibration performance suits automotive and industrial uses. Ready-to-use with terminals, saving time on wiring.

AC 220V coil limits use to compatible power systems. Requires proper power-off and insulation for safe installation. Mini size may not suit extremely high-power custom builds.

SHMZK 2-Pack 12V 4-Pin Car AC Starter Relay G8HL-H71 OEM 39794-SDA-A03/A05 for Honda Accord Civic CR-V Element CR-Z

This 2-pack of SHMZK 12V 4-pin car AC relays serves as a direct OEM replacement for 39794-SDA-A03 and equivalents in Honda models like Accord, Civic, CR-V, and Element. Its compact, rustproof design with 25A capacity and copper plugs delivers reliable circuit protection and energy-efficient operation for Honda owners needing quick fixes.

  • Ensures uninterrupted power flow in AC, fans, and lights for smoother drives
  • Handles 25A loads at 12V with copper plugs for stable, high-heat performance
  • Rustproof and waterproof build lasts longer in harsh underhood conditions
  • Compact 1-inch size fits tight spaces and stores easily in any toolbox
  • Energy-efficient 1.7W coil saves battery while responding instantly

Durable plastic resists impacts, water, and corrosion for long life. Pure copper terminals provide superior conductivity and secure connections. Lightweight at 29g and portable for easy DIY replacements.

Fitment requires verifying your specific Honda model year. Serial numbers may vary by production batch. Plastic housing may not suit extreme heavy-duty abuse.

LCLCTC 40A Din Rail Solid State Relay DC to AC (3-32V Input, 24-480V Output) with Heat Sink & TVS Protection

This LCLCTC Din Rail SSR switches 40A DC to AC loads with 3-32V DC input and 24-480V AC output, featuring a built-in heat sink and TVS protection. It's perfect for industrial automation users needing compact, reliable switching without extra components.

  • Integrated heat sink eliminates extra purchases and enhances heat dissipation for reliable performance
  • Ultra-narrow 0.96in width saves space in tight control panels
  • Effortless DIN rail mounting for quick, tidy installations
  • Built-in TVS protection guards against voltage spikes without added varistors
  • Extended lifespan from zero mechanical wear and stable output

Comes ready with heat sink for immediate use. Compact design fits narrow spaces easily. Simple snap-on DIN rail installation.

Dual-sided heat sink may reduce efficiency when multiple units are side-by-side; fans recommended. Requires load testing to verify performance. Load current sizing needs careful calculation for inductive loads.

Augeny 2-Pack G8HL-H71 4-Pin AC Starter Relay for Honda Accord Civic CR-V Element - Easy Install for AC Fans Lights Compressor

The Augeny 2-pack G8HL-H71 AC relay is a compact 4-pin replacement for Honda Accord, Civic, CR-V, Element, and CR-Z starters, AC compressors, fans, and lights. Its standout easy wire-connect installation and wide compatibility make it ideal for DIY Honda owners fixing electrical issues.

  • Plug-and-play installation saves time and hassle with no tools required
  • Broad compatibility restores AC, starter, fans, lights, and more in Honda vehicles
  • Waterproof sealed base prevents shorts for long-lasting reliability
  • Silver alloy contacts ensure superior conductivity and oxidation resistance
  • Full copper coil delivers strong suction, low heat, and stable high-current performance

Simple wire-only installation for quick DIY repairs. Fits multiple Honda models and applications like AC, starter, horns. Durable plastic shell and waterproof design boosts longevity.

Primarily compatible with specific Honda models and part numbers. Serial numbers may vary by production batch. Requires basic wiring knowledge for proper connection.

Welcome to our comprehensive guide on AC relays, essential components in the world of industrial electrical systems. Whether you're automating machinery, upgrading HVAC setups, or enhancing automotive electrical controls, these relays provide reliable switching for AC-powered circuits, ensuring safety and efficiency in demanding environments.

What Are AC Relays and Why Do You Need Them?

AC relays are electromechanical switches designed specifically for alternating current (AC) loads. They use an AC coil to activate contacts that control higher-power devices, making them ideal for applications requiring robust, high-amperage switching without direct wiring to sensitive controls. Found within the broader Relays category under Industrial Electrical, AC relays come in configurations like 8-pin DPDT (double pole double throw) with LED indicators for status monitoring, or heavy-duty contactors for motors and fans.

In industrial settings, they prevent overloads and enable remote operation. For automotive enthusiasts, they're crucial in air conditioning and cooling fan systems. Their DIN rail compatibility simplifies installation in control panels, saving time and reducing wiring errors.

Key Features to Look for in AC Relays

  • Coil Voltage: Common options include 24V, 110V/120V AC—match to your power supply for reliable activation.
  • Contact Rating: Aim for 10A or higher (up to 40A or 60A in kits) to handle motors, pumps, and compressors safely.
  • Pin Configuration: 8-pin or 14-pin bases with sockets for easy plug-and-play replacement.
  • LED Indicators: Visual feedback on relay status reduces troubleshooting time.
  • Durability: Waterproof options for automotive use, UL-certified for HVAC, and aluminum bases for heat dissipation.

When shopping, prioritize relays with DPDT (2NO/2NC) for versatile control logic. Brands like VAMRONE excel in DIN rail systems with consistent performance, while mxuteuk offers value-packed kits with bases included.

Common Use Cases for AC Relays

AC relays shine in diverse scenarios:

  • Industrial Automation: Interface boards with multiple channels for PLC systems, part of Controls & Indicators.
  • HVAC and Refrigeration: Contactors like those from Dreyoo replace OEM parts in heat pumps and AC units.
  • Automotive: 12V 4-pin relays for Toyota/Lexus fans or starter systems; 60A fan kits with thermostats for radiator cooling.
  • Power Distribution: Multi-channel DIN rail mounts for panel builds.

If your project involves DC loads, explore Control Relays as alternatives. For broader electrical components, check our Industrial Electrical section.

How to Choose the Right AC Relay for Your Needs

Start by assessing load requirements—calculate amperage and voltage drop. For plug-and-play, opt for relays with pre-wired sockets. In harsh environments, select waterproof or sealed units. Test compatibility with DIN rails if panel-mounting is needed. Reading datasheets for switching cycles (millions for quality units) ensures longevity.

Compare electromagnetic vs. solid-state, but AC coils in traditional relays offer cost-effective high-power handling. Kits with thermostats add smart control for fans, preventing overheating.

Frequently Asked Questions (FAQs)

What is the difference between AC and DC relays?

AC relays use AC voltage for the coil, suitable for AC loads with humming minimized in modern designs. DC relays are quieter for battery systems but can't directly switch high AC power.

Are AC relays compatible with DIN rails?

Many, like VAMRONE models, include slotted aluminum bases for easy DIN rail mounting in control cabinets.

Can I use AC relays in automotive applications?

Yes, 12V AC relays and fan kits are common for air conditioning, starters, and cooling in vehicles like Toyota and Honda models.

How do I install an AC relay with a socket base?

Simply plug the relay into the socket, wire per diagram (coil to AC source, contacts to load), and secure the base. LED confirms operation.

What maintenance do AC relays require?

Minimal—inspect for pitting on contacts periodically. Quality units last millions of cycles with no user service needed.

Related Categories
Control Relays 33 Nilight Relays 5 irhapsody Relays 4 VAMRONE Relays 2 AEDIKO Relays 2 Omron Relays 2 TrueMods Relays 1 Coliao Relays 1 EPLZON Relays 1 HoneywellAirComfort Relays 1 DormanProducts Relays 1 BuyersProductsCompany Relays 1