Best SPST Solenoids: Top 10 Picks for Heavy-Duty Projects

1. MaySpare Max Transient 200A Trombetta 12V Solenoid Relay 3 Terminal Heavy Duty Winch Marine 24106 SPST 12 Volt Solenoid

The MaySpare Max Transient 200A Solenoid Relay is a heavy-duty 12V solenoid designed for winch and marine applications. It features a 3-terminal SPST setup, making it versatile and reliable.

This solenoid has a normally open (NO) contact and a flat base metal case. It includes a 180° flat mounting bracket and plated steel housing for durability. The 180℃ copper coil ensures high performance and longevity.

With a max current of 200A and rated current of 100A, it handles heavy loads efficiently. The sealed unit protects against corrosion and environmental damage. Always allow cooling time after 5 minutes of continuous use to prevent overheating.

2. 4 Terminal 24 Volt Continuous Duty Solenoid Relay Need Break 24063 Solenoid for Golf Carts,Winch, Marine Heavy Duty SPST 24VDC 24V Relay Nickel-Plating

This 4 Terminal 24 Volt Solenoid Relay is built tough for heavy-duty use. It’s made with high-quality materials like nickel-plating and 180℃ copper wire. The sealed unit protects it from corrosion and damage.

It works great for golf carts, winches, and marine equipment. The SPST design handles up to 200A max current. It’s normally open (NO) and works with 24VDC.

Use it for ships, military vehicles, and factory machines. Note: It needs a break after 5 minutes of use to avoid overheating. Perfect for reliable performance in tough conditions.

3. 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 and reliable solution for your golf cart, marine, or winch needs. It’s built with high-quality materials, including nickel-plated parts and copper wire, ensuring durability and performance in any environment.

This relay saves battery life, reduces power loss, and handles up to 300A in short bursts. It’s easy to install and replaces multiple part numbers, making it a versatile choice.

4. Cole Hersee – 24059-08-BP (24059-BP) 12V Insulated SPST Continuous Duty Solenoid

The Cole Hersee 24059-08-BP is a 12V insulated SPST solenoid. It’s built for continuous duty, making it reliable for tough jobs.

This solenoid is part of the Solenoid & Relays Product Line by Cole Hersee. It’s designed to handle heavy-duty tasks with ease.

Simple to use, durable, and efficient. Perfect for your electrical needs.

5. 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’s designed to handle high currents and heavy loads with ease. Perfect for boats, RVs, or vehicles needing extra power.

It has a 100,000-cycle life, 500A surge capacity, and 2000W max power. The 4-pin SPST design and copper contacts ensure durability and performance.

Installation is simple with included terminals and insulated caps. It’s compatible with White Rodgers and Cummins models, making it a versatile upgrade for your system.

6. Cole Hersee 24213 Insulated Continuous Duty, 12V, 200A, SPST Solenoid (1 EA)

The Cole Hersee 24213 is a reliable solenoid designed for continuous duty. It works with 12V systems and handles up to 200A.

This SPST solenoid is insulated for safety. It ensures smooth operation in tough conditions.

Ideal for heavy-duty applications, it delivers consistent performance. Trust the Cole Hersee 24213 for your power needs.

7. Stylemafia Max 200A Trombetta Continuous Solenoid Relay 3 Terminal Heavy Duty Winch Marine 24106 SPST Solenoid 12VDC

The Stylemafia Max 200A Trombetta Solenoid Relay is a heavy-duty solution for winch and marine applications. It features a 3-terminal design with a normally open (NO) contact. The flat base metal case ensures durable performance.

This 12VDC solenoid handles up to 200 amps with a rated current of 100A. Its copper coil and sealed unit protect against corrosion and elements. The plated steel case adds extra strength for tough environments.

Installation is simple: connect one side to the battery, the opposite to the starter, and the top screw to the switch. It’s internally grounded for easy setup. Use the recommended fuse or circuit breaker for safe operation.

8. Cole Hersee 24063 24V Insulated Continuous Duty SPST Solenoid

The Cole Hersee 24063 is a 24V solenoid built for continuous duty. It’s SPST with insulated contacts. This solenoid is reliable and durable.

It has large terminals with copper hex nuts and lock washers. The plated steel housing adds strength and protection.

The bracket mounting holes make installation easy. It handles 85A with normally open contacts. Perfect for heavy-duty applications.

9. MaySpare Duty Solenoid Relay NEED BREAK 24063 24 volt For Golf Carts,Winch, Marine Heavy Duty SPST Solenoid

The MaySpare Duty Solenoid Relay is a heavy-duty solution for golf carts, winches, and marine applications. It operates at 24 volts and is designed to handle high currents efficiently.

This SPST solenoid features normally open contacts with 2 copper points and a solid shell. It’s sealed to protect against corrosion and built to last in tough environments.

Key specs: 300A max transient current, 150A rated current, and 180℃ ignition coil wire. Warning: Use as a start solenoid only and avoid continuous duty without breaks.

10. APIELE Continuous Solenoid Relay 12V DC 125A 3 Terminals Heavy Duty Starter Solenoid Zinc-Plating Max 300A in Rush SPST 1NO for Golf Carts, Winch, Marine (12V)

The APIELE Continuous Solenoid Relay is a heavy-duty starter solenoid built for tough jobs. It handles 125A continuously and 300A for short bursts. Perfect for golf carts, winches, and marine use.

Its zinc-plated shell resists rust, and the 180°C copper coil ensures reliability. It’s easy to install with a bracket mount and replaces common part numbers for hassle-free upgrades.