⚡5 PCS 12V 30A 4 Pin Interlocking Automotive Fused Relay Switch Kit with Pre-Wired Harness

✨ This heavy-duty automotive relay kit uses low-current switches to safely control high-power car electrical equipment, built with an integrated fuse for circuit overload protection. The interlocking socket design lets you neatly arrange multiple relays, perfect for various vehicle electrical modification projects.

🛡️ Built-In 30A Fuse for Safe Circuit Protection

Each relay is equipped with an integrated fuse socket and a 30A blade fuse, eliminating the need for an extra separate fuse holder to save installation space. It effectively prevents short circuits and overload damage to your vehicle wiring and connected electrical devices, greatly improving the safety of your car electrical upgrades. Rated for a maximum 40A switching current, this SPST 4-pin normally open relay reliably handles most high-current automotive accessories.

🔗 Unique Interlocking Socket for Neat Wiring Layout

Each relay harness socket features a male and female interlocking slot design, allowing you to snap multiple relay holders together side by side. This tidy integrated arrangement avoids messy scattered wiring under the hood, makes maintenance and inspection much easier, and keeps your engine bay wiring organized and professional.

🪛 Color-Coded Pre-Wired Harness for Simple Installation

Comes with clearly color-marked thick gauge wires for straightforward wiring connection. Red (14AWG) connects to power input terminal 30, White (14AWG) serves as trigger wire for terminal 86, Blue (14AWG) links to your electrical accessory at terminal 87, and Black (16AWG) acts as ground wire for terminal 85. The included metal mounting bracket lets you securely fix the relay on vehicle panels to resist vibration and loose connections.

🌡️ Durable Stable Performance for Harsh Vehicle Environments

Adopting silver tin oxide contact material, the relay delivers stable conductive performance and strong anti-arcing capacity. It works reliably within a wide temperature range from -40°C to +85°C, adapting to extreme cold winters and high-temperature engine bays. Fast 10ms operate and release response ensures sensitive and stable on-off control for your electrical devices.

🚗 Wide Compatibility for Various Vehicle Modifications

Suitable for cars, trucks, RVs, ATVs and other 12V vehicles. Ideal for installing auxiliary LED lights, engine cooling fans, electric winches, modified gauges, power door locks, trunk release mechanisms, and other high-current automotive accessories. It converts low-current control signals to high-current power output to protect your original vehicle switch and factory wiring from burnout.

Package Includes

5 x 12V 30A 4 Pin Automotive Relays
5 x Pre-Wired Interlocking Relay Harness Sockets
5 x 30A Blade Fuses

Product Specifications

Operating Voltage: DC 12V
Contact Form: SPST Normally Open 4 Pin
Rated Current: 30A, Maximum Switching Current: 40A
Wire Gauge: 14AWG for main wires, 16AWG for ground wire
Operating Temperature: -40℃ ~ +85℃
Insulation Resistance: 100MΩ
Dielectric Strength: 500VAC per minute