Hamolar 2 Pack 12V DC 120A Starter Relay Switch Car Heavy

Designed for demanding automotive and marine environments, these relays combine robust alloy terminals, silver-plated internal contacts, and flame-retardant housings to deliver reliable high-current switching up to 120 amps. Each kit includes user-friendly terminals and gaskets to simplify mounting and weatherproofing, making them a practical upgrade for electronics, auxiliary charging and starter isolation tasks in vehicles and boats.

How does the Hamolar relay manage high-current tasks?

The relay’s internal contact design and heavy-gauge terminals are engineered to carry substantial loads without excessive heat buildup or contact wear. Silver-plating on the contact faces reduces resistance and improves conductivity, while the overall assembly supports continuous-duty operation for long-term use.

• 120A high switching capability rated for heavy loads
• Silver-plated contacts reduce electrical resistance and arcing
• Alloy terminals provide secure, low-loss connections
• Continuous-duty construction suitable for prolonged engagement

Can I use these relays for split charging and starter isolation?

Yes — the four-terminal SPST layout is a common and effective configuration for split-charge setups where you need to isolate house batteries from starter batteries while allowing controlled charging. The relay supports up to 14V maximum coil voltage, making it compatible with typical 12V charging systems.

• 4-pin SPST design for simple on/off switching of charge/starter circuits
• Works with standard 12V systems (14V max coil rating)
• Useful for battery isolation, accessory power switching, and starter control

What makes installation straightforward for non-professional fitters?

Each pack includes mounting terminals and gaskets so you don’t have to source extra hardware for a basic installation. The relay’s terminal layout is conventional and easy to wire into most automotive and marine harnesses, and the housing is designed to be secured in common engine-bay or locker locations.

• Terminals and gaskets included for a clean, sealed fit
• Standard pin spacing compatible with common relay sockets or direct-wire installs
• Durable housing simplifies mounting in engine compartments or equipment bays

How durable are these relays in tough conditions?

The relay bodies are made from flame-retardant materials and built to withstand vibration, heat, and repeated switching events common in vehicles and marine craft. The combination of robust materials and plated contacts extends service life compared with inexpensive, unprotected alternatives.

• Flame-retardant casing for enhanced safety and longevity
• Designed to resist vibration and environmental stress in mobile applications
• Silver-plated contacts help prevent corrosion and maintain low resistance

Who is this for? Technicians, boat owners, fleet operators and DIY vehicle enthusiasts who need a reliable, high-current relay for battery isolation, starter switching or auxiliary power control will find the Hamolar 2 Pack suitable. It’s a practical choice when you want a rugged, easy-to-install relay rated for continuous duty and high switching currents without specialized parts or complex wiring adapters.