Max Peak Instant Current 300A Heavy Duty Solenoid Relay

The MaySpare Max Peak Instant Current 300A solenoid relay is a nickel-plated, 12V heavy-duty starter relay engineered to deliver high transient current for starting applications in golf carts, winches, and marine equipment.

This compact, durable solenoid replaces common OEM numbers and combines a high-temperature copper coil with corrosion-resistant nickel plating to stand up to outdoor and vehicle environments. Designed for pulse-start situations rather than continuous heavy-duty use, it provides up to 300A transient current while recommending sustained loads under 100A. The unit’s SPST normally-open contacts and straightforward bracket mounting make it a practical service replacement for a range of small vehicles and equipment.

How does this solenoid support high-starting current without overheating?

The Max Peak uses a coil wound with 180°C copper wire and robust contact points, enabling short bursts of up to 300A during engine or winch starts. To prevent overheating, the design is optimized for intermittent duty with recommended rest periods between starts.

• 180°C-rated copper coil for improved heat tolerance
• Nickel-plated cover reduces corrosion and helps dissipate heat
• Designed for short, high-current pulses rather than continuous draw
• Recommended continuous working current under 100A

Will it fit my golf cart, winch, or boat—what are the mounting and electrical details?

This relay is built as an SPST normally-open starter solenoid with two copper contact points and standard bracket-hole spacing to match many OEM setups. It replaces a variety of common part numbers and mounts with a straight bracket using 5/16" holes spaced 2-13/64" on center.

• Electrical: 12VDC, NO contacts, 14Ω coil resistance, 10.2W coil capacity
• Mounting: straight bracket; holes 5/16" x 19/32" spaced 2-13/64" on center
• Compatible replacements include listed OEM numbers (70-111224, 3635820, etc.)
• SPST one-circuit operation: Off → On during start

How does the nickel plating and build quality extend service life outdoors?

The cover’s nickel-plating meets environmental plating requirements to resist rust and maintain surface integrity in damp or salty conditions. Combined with the high-temperature copper coil and sturdy contacts, the finish helps the relay stay reliable through repeated starts in outdoor applications.

• Nickel-plated cover prevents corrosion and maintains appearance
• High-temp coil wire minimizes insulation breakdown over time
• Copper contact points enable consistent conductivity at each engagement
• Built to replace common starter solenoids found on small vehicles and equipment

How should I use this relay for best reliability and when should I request a different unit?

Use this solenoid for start cycles and short-duty operations—typical for golf carts, small winches, and marine starters. Allow cool-down time after repeated starts; if your application requires continuous high current for long periods, contact the seller for long-duty alternatives.

• Recommended hold/start time: keep individual start cycles short (about 5 minutes total engagement)
• Allow cooling between starts to protect coil and contacts
• For sustained continuous loads above 100A, request a long-duty solenoid model
• Verify terminal layout and bracket spacing before installation

Who is this for: Technicians, fleet managers, and DIY owners of golf carts, RVs, small boats, and winch-equipped utility vehicles who need a reliable, OEM-compatible starter solenoid for intermittent high-current starts. Choose this MaySpare Max Peak relay when you need a compact, nickel-plated replacement that handles strong startup currents while resisting corrosion in outdoor environments.