--- product_id: 36964846 title: "True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars" brand: "online led store" price: "£11.08" currency: GBP in_stock: true reviews_count: 10 category: "Online Led Store" url: https://www.desertcart.co.uk/products/36964846-true-mods-1-pack-5-pin-12v-bosch-style-waterproof store_origin: GB region: United Kingdom --- # 40A high current capacity Waterproof rugged design 12V DC power optimized True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars **Brand:** online led store **Price:** £11.08 **Availability:** ✅ In Stock ## Summary > ⚡ Power your ride with reliability that never quits! ## Quick Answers - **What is this?** True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars by online led store - **How much does it cost?** £11.08 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/36964846-true-mods-1-pack-5-pin-12v-bosch-style-waterproof) ## Best For - online led store enthusiasts ## Why This Product - Trusted online led store brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power That Packs a Punch:** Handles up to 40 amps, perfect for heavy-duty automotive and marine applications. - • **Built to Brave the Elements:** Waterproof housing with ribbed gasket ensures reliable performance rain or shine. - • **Heavy-Duty 12 AWG Hot Wires:** Thick gauge wiring guarantees minimal voltage drop and maximum durability. - • **Plug & Play with Confidence:** Includes harness socket and clear wiring color codes for effortless installation. - • **Precision Bosch Style 5-Pin SPDT:** Versatile single pole double throw relay for seamless control of multiple circuits. ## Overview The True MODS 5-Pin 12V Bosch Style Waterproof Relay Kit features a rugged waterproof design, heavy-duty 12 AWG wiring, and a high-capacity 40A SPDT relay. Engineered for automotive and marine use, it delivers dependable switching performance for fans, horns, lights, and more, backed by a user-friendly harness socket and clear wiring instructions. ## Description Product description COMPLETELY PROTECTED "Transform Innovative Ideas Into Reality" Losing your lights you flights halfway through a night-long trail ride or fishing trip is not an option. Our silicone sealed and shrouded relays are completely waterproof and fully prepared for installation in wet and water prone areas. Completely sealed and protected, your relays won’t suffer the damaging corrosion and accidental shorts that plague non-sealed relays. You’ve worked hard on your project, protect it with waterproof relays. Waterproof construction. Bosch style 5-Pin SPDT (Single Pole Double Throw) Relay. 40A/30A High Switching Capability. Wire Specifications: Black - Ground (85), Red - VDC (30), White - Trigger (86), Yellow - Output N/C (87a), and Blue - Output N/O (87). WATERPROOF Relays mounted in water prone areas need extra protection to prevent shorts and corrosion. Our silicone sealed, waterproof relays protect your hard work and can be safely used on boats, construction equipment, or off-road vehicles. PIGTAIL INCLUDED Easier to remove, more secure, and better looking than the usual rat’s nest of wires and terminals, the included 6” pigtails and sockets clean up your wiring, shorten repair times, and simplify fault diagnosis. SIMPLE MOUNTING No relay box, no problem. The mounting tab quickly mounts your relays to your firewall, roll cage, fender, or switch box. VERSATILE More versatile than a 4-pin relay, 5-pin relays can be used as a single, normally open or normally closed relay, or in more complex setups, like a custom power lock and window build. THE RIGHT TOOL FOR THE JOB Bosch style relays are the standard relay in custom wiring projects and many stock automotive, marine, and machine circuits. These 12V 5-pin relays are rated to handle 30A on normally closed pin 87a and 40A on normally open pin 87. That’s more than enough capacity to handle most common repairs and projects. SIMPLIFY YOUR WIRING PROJECT There’s nothing worse than trying to pull the back terminal off a firewall mounted relay. Ditch the terminals and the needle-nose pliers with our included sockets and pigtail wiring. The sockets, with their interlocking sides, help keep your relays secure and orderly. And, the color-coded pigtail wiring makes it easier to identify and organize your wires during the install. Details & Specs MPN: EPS177R Nominal Coil Voltage: 12 V DC Coil Power: 1.8 W oil Resistance: 80 ohm Must Operate Voltage: 6~8 V DC Must Release Voltage: 0.6~3.6 V DC Maximum Applied Voltage: 15.6 V DC What's Included? (1) 5-Pin 40/30A Waterproof Relay (1) 12-16 AWG Waterproof Harness (1) Instruction Manual Review: Easy to use, effective! - Outstanding module, this was able to quickly and efficiently help me wire a new horn to my truck safely. Would buy again. Review: Good Quality, Heavy Duty. - This is a really nice heavy duty relay. I put it in my 2017 Superduty to run my auxiliary backup lights with my upfitter switches. With this relay installed I can run the auxiliary backup lights in two modes, ON when ever I want (even with the truck OFF) or make them go ON and OFF with the factory back up lights. Works great and I didn’t have to use a diode. My configuration uses two of the upfitter switches in the truck. The mounting bracket worked out nice. This relay is water proof as well, has a nice ribbed torturous path gasket. 7/16/20 Update: Two years now and still working, no issues. Thumbs up! 7/25/2023 Still going strong! 05/21/24 still working!!! I bought two of these on my original purchase, one as a spare because that’s what I do. The spare is still sitting on the shelf in my basement. ## Features - User Manual available for download under Product Information Details - Waterproof construction & heavy duty 12AWG wires for the main contact. - Bosch style 5-Pin SPDT (Single Pole Double Throw) Relay. - 12VDC (14V Max) and 40A/30A High Switching Capability. - Wire Specifications: Black - Ground (85), Red - VDC (30), White - Trigger (86), Yellow - Output N/C (87a), and Blue - Output N/O (87). ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01N66W2XF | | Best Sellers Rank | #10,537 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Replacement Starter Relays | | Brand | ONLINE LED STORE | | Brand Name | ONLINE LED STORE | | Coil Voltage | 12 Volts | | Connector Type | Solder | | Contact Current Rating | 40 Amps | | Contact Material | Silver Plated Copper | | Contact Type | Normally Closed | | Current Rating | 40 Amps | | Customer Reviews | 4.6 out of 5 stars 1,498 Reviews | | Item Weight | 0.24 Pounds | | Manufacturer | ONLINE LED STORE | | Maximum Switching Current | 40 Amps | | Minimum Switching Voltage | 10 Volts (DC) | | Model | SUVELAM | | Mounting Type | Surface Mount | | Operation Mode | Auto,Manual | | Part Number | PSZACCEPS177R | | UPC | 816165023866 | | Wattage | 14.4 watts | ## Product Details - **Connector Type:** Solder - **Contact Material:** Silver Plated Copper - **Contact Type:** Normally Closed - **Current Rating:** 40 Amps - **Mounting Type:** Surface Mount ## Images ![True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars - Image 1](https://m.media-amazon.com/images/I/81m2P8Wl3RL.jpg) ![True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars - Image 2](https://m.media-amazon.com/images/I/71rtcuyFYHL.jpg) ![True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars - Image 3](https://m.media-amazon.com/images/I/71+q+xu0rjL.jpg) ![True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars - Image 4](https://m.media-amazon.com/images/I/81ReNQjiP4L.jpg) ![True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars - Image 5](https://m.media-amazon.com/images/I/61UN2iwyEiL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How many amps does it take to make the relay switch from open to closed?? I have a 1.5 amp circuit that I want to use as the switch power** A: The relay only requires about 150 milliamps @ 12 V DC to be triggered. Hope this helps. **Q: I am wanting to put in an on/off switch on a 4wheeler to the existing 12v dc auxilary jack. what wires would to to what posts on the 3 prong switch?** A: It would be better to run a new fused feed from the battery and use the accessory wire from the key switch so you always shut it off and not forget and run your battery dead. **Q: Im noticing a constant buzz from my relays. What could be the issue? Bad switch? Bad ground? too much voltage drop?** A: Are all the relays that are buzzing connected to the same trigger switch? If so, the trigger switch may be supplying power (or ground) to the relays even when in the "off" position. This is only one possibility. The relay itself may be faulty, just the likelihood of multiple units failing at the same time is slim. Please contact us directly to further troubleshoot the matter. Thanks. **Q: I am hooking up a amp to a mototcycle, the instruction says i need to use this. Why?** A: HOW MANY AMPS DOES YOUR AMPLIFIER DRAW..... IT MAY NEED ITS OWN CIRCUT BREAKER FED THUR THIS RELAY, BE CAREFULLY YOU DONT BURN THINGS UP, USE THE RIGHT SIZE WIRING AND PROTECT WITH THE RIGHT SIZE FUSE ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy to use, effective! *by S***S on January 8, 2026* Outstanding module, this was able to quickly and efficiently help me wire a new horn to my truck safely. Would buy again. ### ⭐⭐⭐⭐⭐ Good Quality, Heavy Duty. *by K***N on April 21, 2018* This is a really nice heavy duty relay. I put it in my 2017 Superduty to run my auxiliary backup lights with my upfitter switches. With this relay installed I can run the auxiliary backup lights in two modes, ON when ever I want (even with the truck OFF) or make them go ON and OFF with the factory back up lights. Works great and I didn’t have to use a diode. My configuration uses two of the upfitter switches in the truck. The mounting bracket worked out nice. This relay is water proof as well, has a nice ribbed torturous path gasket. 7/16/20 Update: Two years now and still working, no issues. Thumbs up! 7/25/2023 Still going strong! 05/21/24 still working!!! I bought two of these on my original purchase, one as a spare because that’s what I do. The spare is still sitting on the shelf in my basement. ### ⭐⭐⭐⭐⭐ After market mirrors lighting fix *by C***E on December 4, 2024* Grandpa got new mirrors for his truck and wanted to get the puddle light working. I used this relay and hooked it up to the door sensor to trigger the puddle light to be on. Great quality. Tight seal and could be used omunder the hood. Not the case for me since it was inside anyway. ## Frequently Bought Together - True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars - 12 AWG Inline Fuse Holder - 12 Gauge Fuse Holder for 30A Blade Fuse (6 Pack) - 10 Gauge Fuse Holder - 10 AWG Inline Fuse Holder with 40 AMP ATC Blade Fuses (4pack) --- ## 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.co.uk/products/36964846-true-mods-1-pack-5-pin-12v-bosch-style-waterproof](https://www.desertcart.co.uk/products/36964846-true-mods-1-pack-5-pin-12v-bosch-style-waterproof) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-23*