Best 12V 4 Terminal Solenoids

Looking for the best 12V 4 terminal solenoids? We’ve got you covered with a curated list of top 10 options to help you find the perfect one for your needs.

Good solenoids matter. They keep power steady. They make machines run smooth.
A strong 12V 4‑terminal solenoid can turn a slow system into one that feels sharp and ready.

People trust these parts because they work hard. They give clean power every time.
With the right guide, choosing the best one feels simple and safe.

List of Top 10 12V 4 Terminal Solenoids

Title	Best For	Price
Max 300A 12 Volt Duty Solenoid Relay 4-Terminal for Golf Carts Heavy Duty Winch Marine in Rush SPST 12VDC 12V Solenoid Relay Nickel-Plating	This heavy-duty solenoid relay is perfect for anyone needing reliable power control in golf carts, marine applications, or winches. It’s built tough with nickel-plating and copper components to handle high currents while saving battery life.	View on Amazon (paid link)
AFEISOL Hot Rod Starter Relay Solenoid 12V 4-Terminal Heavy Duty SW3 Compatible with 1956-up Truck Starter Replaces B-6A-11450A C6AF C7AF C3912 C9AF D2AF11450AA 50-430 (Black)	This starter relay solenoid is perfect for car owners who need a reliable replacement for their 1956-up trucks. It’s ideal for those looking for a durable, high-quality part that fits specific models like AEROSTAR, BRONCO, or LINCOLN MERCURY.	View on Amazon (paid link)
12V Dump Trailer Solenoid Relay, 4-Terminal Intermittent Duty Solenoid for Hydraulic Pumps, Replaces SAZ4201GJ, 7522, 070009, 190107, KTI 391-2-C (Fits Prestolite, Monarch, PJ Trailers, Iron Bull)	This 12V dump trailer solenoid is perfect for anyone with a hydraulic system needing a reliable replacement. It’s ideal for dump trailers, hydraulic pumps, and motorhome leveling jacks.	View on Amazon (paid link)
MaySpare Solenoid Relay Switch 12 Volt 4 Terminal Trombetta PowerSeal Solenoid 150 Amp Intermittent Duty DC Contactor, 684-1261-212, 684-1251-212	This MaySpare Solenoid Relay Switch is perfect for anyone needing a reliable 12V DC solenoid for hydraulic systems, RVs, or lawn equipment. It’s built tough with heat-resistant materials and handles up to 150 amps for intermittent use.	View on Amazon (paid link)
Tecreddy 117-1197 Starter Solenoid for Toro Timecutter ss5000 z4200 ss4225 ss4235 Exmark Zero Turn Lawn Mower, Replace Part #784-1221-210 104-3189 E513075 1-513075 212655 28-4210 47-1910	This Tecreddy 117-1197 Starter Solenoid is perfect for anyone with a Toro or Exmark Zero Turn lawn mower needing a reliable replacement part. It’s easy to install and built to last, making it ideal for homeowners or professionals who want their mower running smoothly.	View on Amazon (paid link)
12VDC Max 300A Continuous Duty Solenoid Relay with Resistor and diode for Golf Carts Winch Marine in Rush Nickel Plating	This 12VDC Max 300A Solenoid Relay is perfect for anyone needing reliable power control in golf carts, winches, marine, or factory machines. Its durable design and wide application make it a great choice for heavy-duty use.	View on Amazon (paid link)
Mifyca SAZ4201GJ Dump Trailer Solenoid 12V 4 Terminal 100 Amp Intermittent Duty Solenoid Relay Replaces SAZ4201ER 7522 07522 070009 190107 KTI Unit KTI 391-2-C	This dump trailer solenoid is perfect for anyone who needs a reliable replacement for their dump trailer or motorhome. It’s easy to install and works great in tough conditions.	View on Amazon (paid link)
10L0L 12V 4 Terminal Solenoid for EZGO TXT Marathon Gas 2/4 Cycle 1979-1994 Golf Cart 16542-G1, 16542G1, 1133	This part is great for anyone who wants their EZGO cart to run smooth and start fast. It helps people who need a strong, reliable solenoid that fits older EZGO gas models.	View on Amazon (paid link)
MaySpare 80-Amp 12V Continuous Duty Solenoid Battery Isolator and Starter Relay – White 4 Pin SPST	The MaySpare 80-Amp Solenoid Battery Isolator is perfect for anyone needing a reliable way to manage dual batteries. It’s ideal for boats, RVs, or off-road vehicles where extra power is essential.	View on Amazon (paid link)
Annolai Dump Trailer Solenoid 391-2 391-2-C 12V 4 Terminal 100 AMP Dump Trailer Parts for Intermittent Duty Solenoid Relay Replace SAZ4201GJ 7522 SAZ-4201ER 070009 190107 KTI Unit	This Annolai Dump Trailer Solenoid is perfect for anyone who needs a reliable replacement part for their hydraulic dump trailer. It’s ideal for owners of PJ trailers with KTI systems or motorhomes with hydraulic leveling jacks.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 12V 4 Terminal Solenoids in this expert-curated guide. Each product is thoroughly reviewed for performance, durability, and value, ensuring you find the perfect fit for your needs. Whether for heavy-duty or everyday use, this guide makes your choice simple and confident.

1. Max 300A 12 Volt Duty Solenoid Relay 4-Terminal for Golf Carts Heavy Duty Winch Marine in Rush SPST 12VDC 12V Solenoid Relay Nickel-Plating

The Max 300A 12 Volt Duty Solenoid Relay is a heavy-duty solution for golf carts, winches, and marine use. It handles up to 300A in short bursts, making it reliable for tough jobs.

Built with high-quality materials, it features a nickel-plated cover and 180℃ copper wire for durability. Its 4-terminal design ensures efficient power flow and reduced loss.

Easy to install, saves battery life, and works in any environment. Perfect for heavy-duty applications.

Pros	Cons
High-quality components ensure durability and reliability. Nickel-plated cover resists corrosion in any environment. Max 300A flash current saves your battery efficiently. Copper terminals reduce power loss for better performance.	Needs cool-down often during long use Not ideal for high continuous current Short run time before rest is required

Perfect For:

This heavy-duty solenoid relay is perfect for anyone needing reliable power control in golf carts, marine applications, or winches. It’s built tough with nickel-plating and copper components to handle high currents while saving battery life.

Ready to Purchase?

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2. AFEISOL Hot Rod Starter Relay Solenoid 12V 4-Terminal Heavy Duty SW3 Compatible with 1956-up Truck Starter Replaces B-6A-11450A C6AF C7AF C3912 C9AF D2AF11450AA 50-430 (Black)

AFEISOL Hot Rod Starter Relay Solenoid 12V 4-Terminal Heavy Duty SW3 Compatible with 1956-up Truck Starter Replaces B-6A-11450A C6AF C7AF C3912 C9AF D2AF11450AA 50-430 (Black)

This starter relay solenoid is strong. It is steady. It is built to last.
It uses a high‑quality copper coil and a tough, coated surface that fights rust and heat.

The 4‑terminal design gives safe and stable power flow. Each part is made to cut noise and boost control.

It fits many Ford and Mercury models from older years. It also replaces many SW3‑type parts with ease.

Pros	Cons
High-quality copper coil ensures durability and longevity. 4-terminal design guarantees stability and safety during operation. Compatible with multiple models, offering wide applicability. Replaces various part numbers, saving time and effort. Rigorously tested for reliable and hassle-free performance.	No installation guide included, might need extra help. Limited compatibility with newer vehicle models, check before buying. No warranty details provided, potential risk for buyers.

Perfect For:

This starter relay solenoid is perfect for car owners who need a reliable replacement for their 1956-up trucks. It’s ideal for those looking for a durable, high-quality part that fits specific models like AEROSTAR, BRONCO, or LINCOLN MERCURY.

Ready to Purchase?

View Price on Amazon (paid link)

3. 12V Dump Trailer Solenoid Relay, 4-Terminal Intermittent Duty Solenoid for Hydraulic Pumps, Replaces SAZ4201GJ, 7522, 070009, 190107, KTI 391-2-C (Fits Prestolite, Monarch, PJ Trailers, Iron Bull)

12V Dump Trailer Solenoid Relay, 4-Terminal Intermittent Duty Solenoid for Hydraulic Pumps, Replaces SAZ4201GJ, 7522, 070009, 190107, KTI 391-2-C (Fits Prestolite, Monarch, PJ Trailers, Iron Bull)

The 12V dump trailer solenoid gives your pump strong, steady power. It fits many OEM parts with ease. It keeps your system running smooth.

The build is tough. The parts last long.

This 4‑terminal solenoid works with many pump setups. It handles high load with no stress. It installs fast with the included hardware.

Pros	Cons
Direct OEM replacement for multiple brands, ensuring perfect fit. Heavy-duty build resists corrosion, dust, and water for long life. Handles high currents (100A/200A) for reliable performance. Easy installation with included hardware and pre-wired design.	No instructions included, might confuse first-time installers. Plastic housing could crack under extreme pressure or impact. Not for continuous use, may overheat with prolonged operation.

Perfect For:

This 12V dump trailer solenoid is perfect for anyone with a hydraulic system needing a reliable replacement. It’s ideal for dump trailers, hydraulic pumps, and motorhome leveling jacks.

Ready to Purchase?

View Price on Amazon (paid link)

4. MaySpare Solenoid Relay Switch 12 Volt 4 Terminal Trombetta PowerSeal Solenoid 150 Amp Intermittent Duty DC Contactor, 684-1261-212, 684-1251-212

MaySpare Solenoid Relay Switch 12 Volt 4 Terminal Trombetta PowerSeal Solenoid 150 Amp Intermittent Duty DC Contactor, 684-1261-212, 684-1251-212

The MaySpare Solenoid Relay Switch gives strong 12V power. It has 4 solid terminals that fit well. It works with key Case parts with ease.

It handles 150A and can surge to 800A. The coil uses 180°C copper wire for long life. The sealed build adds better heat control.

Use it on many RV and hydraulic systems. It is built to last.

Pros	Cons
150A intermittent power for heavy-duty tasks. Sealed design boosts durability and heat resistance. Versatile use in hydraulic, RV, and lawn applications. Easy 4-terminal setup for quick installation.	Not for constant use, only intermittent duty. No ground connection, requires extra care for safety. Limited to 12V systems, not for higher voltages.

Perfect For:

This MaySpare Solenoid Relay Switch is perfect for anyone needing a reliable 12V DC solenoid for hydraulic systems, RVs, or lawn equipment. It’s built tough with heat-resistant materials and handles up to 150 amps for intermittent use.

Ready to Purchase?

View Price on Amazon (paid link)

5. Tecreddy 117-1197 Starter Solenoid for Toro Timecutter ss5000 z4200 ss4225 ss4235 Exmark Zero Turn Lawn Mower, Replace Part #784-1221-210 104-3189 E513075 1-513075 212655 28-4210 47-1910

Tecreddy 117-1197 Starter Solenoid for Toro Timecutter ss5000 z4200 ss4225 ss4235 Exmark Zero Turn Lawn Mower, Replace Part #784-1221-210 104-3189 E513075 1-513075 212655 28-4210 47-1910

The Tecreddy 117-1197 Starter Solenoid is a reliable replacement part for your lawn mower. It works with Toro TimeCutter and Exmark Zero Turn models. This solenoid ensures your mower starts smoothly every time.

It features a 12V 4-terminal design with a 2-hole bottom bracket. The high-quality materials include ABS and QA-1/155 Copper Wire. This ensures durability and excellent conductivity for long-lasting performance.

The package includes one starter solenoid. If you have questions, contact us freely for support.

Pros	Cons
Fits many Toro and Exmark models for easy replacement. High-quality materials ensure durability and safety. 12V with 4 terminals for reliable performance. Simple installation with 2-hole bracket design.	Limited to specific mower models, not universal. No installation tools or instructions included. Single unit only, no backup provided.

Perfect For:

This Tecreddy 117-1197 Starter Solenoid is perfect for anyone with a Toro or Exmark Zero Turn lawn mower needing a reliable replacement part. It’s easy to install and built to last, making it ideal for homeowners or professionals who want their mower running smoothly.

Ready to Purchase?

View Price on Amazon (paid link)

6. 12VDC Max 300A Continuous Duty Solenoid Relay with Resistor and diode for Golf Carts Winch Marine in Rush Nickel Plating

This 12VDC solenoid relay is built for heavy-duty use. It handles up to 300A in short bursts. Perfect for golf carts, winches, and marine applications.

Made with high-quality materials, it features nickel-plating for durability. The copper coil ensures reliable performance in any environment.

It’s easy to install with a straight bracket and mounting holes. Widely used in ships, military vehicles, and factory machines.

Pros	Cons
High-quality components ensure reliable performance in any environment. Nickel-plated design meets environmental standards for durability. Widely used in golf carts, winches, and marine applications. Continuous duty solenoid handles up to 300A max current.	Not for high-current long-term use, max 150A continuous. Requires breaks in operation: 5 sec on, 50 min off. Specific mounting holes needed for installation.

Perfect For:

This 12VDC Max 300A Solenoid Relay is perfect for anyone needing reliable power control in golf carts, winches, marine, or factory machines. Its durable design and wide application make it a great choice for heavy-duty use.

Ready to Purchase?

View Price on Amazon (paid link)

7. Mifyca SAZ4201GJ Dump Trailer Solenoid 12V 4 Terminal 100 Amp Intermittent Duty Solenoid Relay Replaces SAZ4201ER 7522 07522 070009 190107 KTI Unit KTI 391-2-C

Mifyca SAZ4201GJ Dump Trailer Solenoid 12V 4 Terminal 100 Amp Intermittent Duty Solenoid Relay Replaces SAZ4201ER 7522 07522 070009 190107 KTI Unit KTI 391-2-C

The Mifyca SAZ4201GJ Solenoid gives strong, steady power. It works fast. It keeps your dump trailer moving with ease.

This 12V 4‑terminal solenoid fits many dump trailers. It also replaces several common part numbers.

The build is tough. The install is simple. The support is solid.

Pros	Cons
Fits many dump trailers Replaces several common parts Strong build for long use Simple to install Great support if issues come up	Not for continuous use, only intermittent duty. No wiring included, requires extra parts for setup. Manual installation, care needed to avoid damage.

Perfect For:

This dump trailer solenoid is perfect for anyone who needs a reliable replacement for their dump trailer or motorhome. It’s easy to install and works great in tough conditions.

Ready to Purchase?

View Price on Amazon (paid link)

8. 10L0L 12V 4 Terminal Solenoid for EZGO TXT Marathon Gas 2/4 Cycle 1979-1994 Golf Cart 16542-G1, 16542G1, 1133

The 10L0L 12V 4 Terminal Solenoid is a must-have for EZGO TXT Marathon Gas golf cart owners. It fits models from 1979-1994, ensuring compatibility. This solenoid is easy to install and built to last.

This solenoid acts as a bridge between the battery and starter generator. It converts electrical energy into mechanical energy, powering your cart. Without it, your cart may not run as it should.

Package includes 1 x 12V solenoid with metal bracket. It’s a factory direct OEM product, as good as the original. Replace your old solenoid with this reliable and affordable option.

Pros	Cons
Fits perfectly on 1979-1994 EZGO TXT/Marathon golf carts. Reliable 12V solenoid ensures smooth ignition every time. Durable copper contacts for long-lasting performance. OEM quality, works as good as the original part.	May not fit carts outside listed years Only one solenoid in the package Needs skill to install for new users

Perfect For:

This part is great for anyone who wants their EZGO cart to run smooth and start fast. It helps people who need a strong, reliable solenoid that fits older EZGO gas models.

Ready to Purchase?

View Price on Amazon (paid link)

9. MaySpare 80-Amp 12V Continuous Duty Solenoid Battery Isolator and Starter Relay – White 4 Pin SPST

The MaySpare 80-Amp Solenoid Battery Isolator is a reliable and efficient solution for managing dual batteries. It handles 80 amps continuously and 500 amps in surges, making it powerful for heavy-duty use. Its 12V DC operation ensures compatibility with most systems.

This 4-pin SPST relay comes with copper contacts and silver pins for durability. It has a 100,000 mechanical cycle life, ensuring long-lasting performance. The normally open design includes attaching hardware for easy installation.

The kit includes 4 big 100-amp terminals and 4 small terminals for simple connections. It also comes with insulated red caps for safety. For better service, contact us with any questions!

Pros	Cons
80-Amp continuous duty for reliable power management. 500A surge capacity handles heavy loads effortlessly. Easy install with 100AMP terminals and insulated caps. Long-lasting with 100,000 mechanical cycles for durability.	Limited continuous use (4-5 hours) before needing a break. Requires constant voltage, not ideal for all setups. No built-in protection against overloading or short circuits.

Perfect For:

The MaySpare 80-Amp Solenoid Battery Isolator is perfect for anyone needing a reliable way to manage dual batteries. It’s ideal for boats, RVs, or off-road vehicles where extra power is essential.

Ready to Purchase?

View Price on Amazon (paid link)

10. Annolai Dump Trailer Solenoid 391-2 391-2-C 12V 4 Terminal 100 AMP Dump Trailer Parts for Intermittent Duty Solenoid Relay Replace SAZ4201GJ 7522 SAZ-4201ER 070009 190107 KTI Unit

Annolai Dump Trailer Solenoid 391-2 391-2-C 12V 4 Terminal 100 AMP Dump Trailer Parts for Intermittent Duty Solenoid Relay Replace SAZ4201GJ 7522 SAZ-4201ER 070009 190107 KTI Unit

The Annolai Dump Trailer Solenoid 391-2 gives strong, steady power. It works fast and keeps your trailer system running smooth. Every part is built for long use.

This 12V, 4‑terminal solenoid handles up to 100 amps with ease. It fits many dump trailer brands and KTI units. It also replaces several major OEM parts with no trouble.

Use it for dump trailers, small engines, or hydraulic jacks. It is a simple, reliable upgrade.

Pros	Cons
Replaces multiple parts, saving time and money on repairs. Handles 100 AMP continuous duty, perfect for heavy-duty trailers. Fits popular brands like Prestolite, Monarch, and KTI systems. 4-terminal design ensures easy installation and reliable performance.	May not fit all trailer setups Needs wiring skill to install Not ideal for heavy nonstop use

Perfect For:

This Annolai Dump Trailer Solenoid is perfect for anyone who needs a reliable replacement part for their hydraulic dump trailer. It’s ideal for owners of PJ trailers with KTI systems or motorhomes with hydraulic leveling jacks.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Good solenoids make power feel smooth. They keep your system fast and steady.
This guide helps you pick the best 12V 4‑terminal solenoid with ease. It feels simple, clear, and stress‑free.

Factors to Consider When Buying a 12V 4‑Terminal Solenoid

Power Rating:
A solenoid must match your system load. Pick one that handles strong amps with ease. This keeps power clean and safe.
Duty Type:
Choose continuous duty for long run time. Pick intermittent duty for short bursts. This keeps the solenoid cool and steady.
Build Quality:
Look for copper coils and solid metal parts. These last long and stay stable. They also cut heat and loss.
Terminal Strength:
Strong 4‑terminal posts give clean flow. They hold tight and stay firm. This keeps your system smooth.
Fit and Size:
Make sure the solenoid fits your setup. Check the bracket and hole layout. A good fit makes install fast.
Use Case:
Match the solenoid to your job. Some work best for carts. Others fit pumps or lawn tools. Pick what fits your need.
Heat Control:
Good heat control keeps the coil safe. Look for sealed builds and high‑temp wire. This helps the solenoid last longer.
Rust Protection:
A coated or plated shell fights rust. It stays clean in wet or dusty spots. This keeps power steady.
Noise Level:
Some solenoids click loud. Some stay quiet. Pick the one that feels right for you.
Brand Fit:
Some units match older models. Others replace many part codes. Check your model list to avoid errors.
Install Ease:
Simple wiring saves time. Clear posts and firm brackets help. This makes setup smooth.
Support and Parts:
Good makers offer help fast. They also list clear part numbers. This makes swaps easy.