LDMINDA 12V 300A Solenoid Relay 4-Terminal Nickel-Plated - Heavy-Duty SPST Bracket-Mount

LDMINDA's 4-terminal 12V solenoid relay is a nickel-plated, heavy-duty 300A transient-rated switch designed to reliably control battery power for golf carts, winches and marine equipment.

This durable SPST-style solenoid delivers a high transient current capacity in a compact bracket-mounted package. Built with a nickel-plated housing and a tightly wound copper coil, the relay is engineered to reduce voltage loss and protect battery life when switching heavy loads. It replaces a range of common part numbers and fits standard mounting hole centers, making it a practical direct-replacement component for maintenance and upgrades.

How much current can this solenoid handle and what are the safe limits?

The solenoid is rated for a maximum transient flash current of 300A but is intended to operate continuously at lower currents. For long-term use keep continuous current below the recommended threshold to avoid overheating.

• Maximum transient (flash) current: 300A
• Recommended continuous working current: under 150A (typical safe use ≈ 80A)
• Continuous operation guidance: up to 5 minutes, then cool down period

What materials and construction make this relay durable?

The relay uses a high-temperature copper coil and nickel-plated housing to resist corrosion and maintain reliable electrical contact. Copper contact points reduce resistive losses and help maintain stable battery voltage under load.

• Coil windings: 180°C rated copper wire for thermal resilience
• Housing finish: nickel plating for environmental protection
• Contact type: copper points for improved conductivity and reduced power loss

Which vehicles and applications is this solenoid compatible with?

Designed as a general-purpose battery isolation and switching relay, it suits golf carts, utility vehicles, winches, small marine systems and other 12V DC equipment. It replaces a variety of OEM part numbers, simplifying repairs and fleet maintenance.

• Commonly used on golf carts and electric utility vehicles
• Suitable for winch control, battery isolator tasks, and marine 12V systems
• Replaces OEM numbers: 70-111224, 3635820, 1114208, 1114218, 1114223, 1114534, 1114547

How do I mount and wire this 4-terminal solenoid safely?

The relay is designed for straightforward bracket mounting with two center-spaced holes and clear four-terminal connections. Follow vehicle wiring diagrams and secure connections to the proper battery and accessory terminals to ensure reliable switching.

• Bracket mounting hole centers: 5/16 x 19/32 (2-13/64 inches on center)
• Four terminals: two heavy power terminals, two control/coil terminals for SPST operation
• Use appropriate gauge cable and secure hardware to prevent voltage drop

Who is this for? This LDMINDA solenoid is aimed at DIY mechanics, fleet maintenance teams and anyone who services electric golf carts, light-duty winches, and small marine electrical systems. It’s a good choice if you need a direct-replacement relay with high transient capability, corrosion-resistant plating, and copper contacts to minimize power loss during heavy starts or intermittent high-current events. Always follow safe wiring practices and respect the recommended continuous current limits for reliable long-term performance.