--- product_id: 491699536 title: "4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set" brand: "daymaker" price: "2096 kr" currency: ISK in_stock: true category: "Daymaker" url: https://www.desertcart.is/products/491699536-4-pin-40-30-amp-12-v-dc-waterproof-relay store_origin: IS region: Iceland --- # 40A/30A high current capacity IP67 waterproof sealed design Heavy-duty 12 AWG tinned copper wires 4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set **Brand:** daymaker **Price:** 2096 kr **Availability:** ✅ In Stock ## Summary > ⚡ Stay powered, stay protected — the relay that never quits! ## Quick Answers - **What is this?** 4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set by daymaker - **How much does it cost?** 2096 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/491699536-4-pin-40-30-amp-12-v-dc-waterproof-relay) ## Best For - daymaker enthusiasts ## Why This Product - Trusted daymaker brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Weatherproof Warrior:** IP67-rated waterproof relay ensures flawless performance in rain, mud, and marine environments. - • **Plug & Play Precision:** Quick-connect relay socket with metal mounting tab for effortless, secure installation. - • **Versatile Control Hub:** Perfect for car keys, power locks, fans, motors, and overload protection—engineered for the multitasker. - • **Power Through Anything:** Handles up to 40A/30A current for robust automotive and marine applications. - • **Corrosion-Resistant Craftsmanship:** Premium tinned copper wires resist oxidation for long-lasting reliability. ## Overview This 4-PIN 12V DC waterproof relay kit features a heavy-duty 40A/30A SPST relay with IP67 sealing, paired with a durable 12 AWG tinned copper wire harness. Designed for automotive, marine, and off-road use, it offers corrosion resistance, quick-connect installation, and reliable control for power locks, motors, and more. ## Description Buy 4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set: Accessory Power - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - 【Function】: 12VDC (14V Max) waterproof 4-Pin SPST (Single Pole Single Throw) Relay with 40A/30A high current carrying capacity, heavy-duty make/break relay. But never go beyond its capabilities, try to stay 10 to 15% below what the rate is for. Widely used in car keys power control, over-load protection, trunk release, power door lock/actuator control, control motors/other electronics etc. - 【Premium Material】: Durable relay and harness socket with 4 wires; made from high-grade materials to ensure superior quality and long lifespan. Built-in tinned wire makes it can be stored without concern due to its better performance in corrosion resistance and oxidation resistance. - 【Weatherproof Relay】:The Waterproof relay tightly sealed with strong cap and seal ring, excellent performance of waterproof, to be used on off-road vehicles, boats, and dirt track cars that are often exposed to wet or muddy conditions. - 【Wire Specifications】: White - Ground (85), Red - VDC (30), Black - Trigger (86), Blue - Output N/C (87). The purchase includes the relay itself and a relay socket/harness with wires. Metal mounting tab is present on the relay for ease of installation. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BDGLBDCT | | Best Sellers Rank | #310,520 in Automotive ( See Top 100 in Automotive ) #659 in Automotive Replacement Accessory Power Relays | | Brand Name | DAYMAKER | | Coil Resistance | 80 ohm | | Coil Voltage | 12 volts | | Connector Type | Quick Connect | | Contact Current Rating | 30 A | | Contact Material | Copper | | Contact Type | Normally Closed | | Current Rating | 30 A | | Customer Reviews | 4.6 4.6 out of 5 stars (83) | | Included Components | NO | | Manufacturer | DAYMAKER | | Maximum Switching Current | 30 A | | Minimum Switching Voltage | 6 volts_of_direct_current | | Mounting Type | Plug In Mount | | Operation Mode | Automatic | | Part Number | A05RH04P | | Specification Met | IP67 | | UPC | 782279894466 | | Wattage | 1.8 watts | ## Product Details - **Connector Type:** Quick Connect - **Contact Material:** Copper - **Contact Type:** Normally Closed - **Current Rating:** 30 A - **Mounting Type:** Plug In Mount ## Images ![4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set - Image 1](https://m.media-amazon.com/images/I/71KT8RgKf8L.jpg) ![4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set - Image 2](https://m.media-amazon.com/images/I/61jUtHhikyL.jpg) ![4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set - Image 3](https://m.media-amazon.com/images/I/71jqcPAmucL.jpg) ![4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set - Image 4](https://m.media-amazon.com/images/I/61-6XZQhj9L.jpg) ![4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPST 12V Automotive Relay Harness Set - Image 5](https://m.media-amazon.com/images/I/61VFTAf7wQL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - 4-PIN 40/30 AMP 12 V DC Waterproof Relay Kit Harness Socket - Heavy Duty 12 AWG Tinned Copper Wires, Automotive Relays for Boats Auto Fan Cars 4-PIN SPDT Bosch Style 12V Automotive Relay Harness Set - 10 Gauge Fuse Holder - 10 AWG Inline Fuse Holder with 40 AMP ATC Blade Fuses (4pack) - AUTOWIRING Automotive Hi-Flex 110 Amp 16mm² Battery/Starter/Inverter/Welding PVC Cable Wire (Red, 10 Metre) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/491699536-4-pin-40-30-amp-12-v-dc-waterproof-relay](https://www.desertcart.is/products/491699536-4-pin-40-30-amp-12-v-dc-waterproof-relay) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-09-05*