--- product_id: 155789201 title: "Waterproof 40/30 AMP Relay" brand: "nilight" price: "363 Lei" currency: RON in_stock: true reviews_count: 13 category: "Nilight" url: https://www.desertcart.ro/products/155789201-waterproof-40-30-amp-relay store_origin: RO region: Romania --- # 40A max switching current Waterproof & dustproof seal Heavy-duty 12 AWG tinned copper wiring Waterproof 40/30 AMP Relay **Brand:** nilight **Price:** 363 Lei **Availability:** ✅ In Stock ## Summary > ⚡ Stay powered, stay protected — the relay set your ride deserves! ## Quick Answers - **What is this?** Waterproof 40/30 AMP Relay by nilight - **How much does it cost?** 363 Lei with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/155789201-waterproof-40-30-amp-relay) ## Best For - nilight enthusiasts ## Why This Product - Trusted nilight brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Premium-grade materials and a robust design ensure longevity and consistent performance under pressure. - • **Value-Packed 5-Pack:** Get five high-quality relays at a fraction of OEM prices—upgrade your fleet or projects without breaking the bank. - • **Plug & Play Convenience:** Pre-wired harness with color-coded 12/16 AWG wires for effortless installation—no rewiring needed. - • **Unmatched Power Handling:** Switch up to 40 amps with confidence—perfect for demanding automotive setups. - • **Weatherproof Reliability:** Sealed tight against moisture, dust, and dirt to keep your circuits safe rain or shine. ## Overview The Nilight 5 Pack Waterproof Relay and Harness Set features 5 durable 12V SPDT automotive relays with a max switching current of 40 amps, housed in waterproof, dustproof casings. Equipped with heavy-duty 12 AWG tinned copper wires and a pre-wired harness, this set guarantees easy installation and long-lasting performance in all weather conditions. Ideal for professional-grade automotive electrical upgrades, it offers exceptional value with a 2-year warranty and proven reliability. ## Description Buy Nilight 5 Pack Waterproof Relay and Harness 40/30 AMP Heavy Duty 12 AWG Tinned Copper Wires 5-PIN SPDT Style 12V Automotive Relay and Harness Set: Battery Switches - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Great weatherproof relays - These relays are a good price for the quality. Nice and sealed and havent had a issue. Highly recommend these Review: Relays for Caterpillar Skid Steer - I was looking for less expensive relays for replacing relays on my CAT Skid Steer. These same relays are used for both engine starter relay and the glow plug relay on the skid steer. I paid about $37 for one relay at the CAT dealer, while this whole five pack of relays are way less than that. I was thinking these Nilight relays would be lower quality, but now I have a different opinion. I weighed the Nilight relay vs the well used, original CAT relay (sorry for the dirt and dust), and they were exactly the same. I tested one relay with a 9V battery, and they had a very solid, distinctive click when the relay contacts changed state. My ohmmeter confirmed the contacts changed state properly. I confirmed the CAT relay fit into the connector the same as the Nilight relay. It is a very tight fit, but that is due to the rubber gasket that prevents moisture intrusion. The icing on the cake is that these Nilight relays are a straight plug and play, no rewiring required. That rating for 10,000,000 cycles may be a stretch, but who knows, it is looking pretty good so far! ## Features - 12 V DC automotive waterproof relays (max 14 V). Note: 12 V and 14 V are coil voltages, they are not the voltage that triggers the switch - Premium quality: durable relay and harness socket with 5 wires; made from high-grade materials to ensure superior quality and long lifespan - Pre-wired Harness: Heavy duty 12/16 AWG wiring harness. Black - 16AWG Pin85, White - 16AWG Pin86, Red - 12AWG Pin30 Yellow - 12AWG Pin87a, and Blue - 12AWG Pin87 - Enhanced Waterproof - The 5-Pin relays are tightly sealed with strong cap and seal ring, excellent performance of waterproof, dust proof and moisture proof, works well in any weather conditions - Package includes: 5 pack Waterproof Relay and Harness. 1x User manual ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07V9M7FMH | | Best Sellers Rank | #4,166 in Automotive ( See Top 100 in Automotive ) #7 in Automotive Replacement Battery Switches | | Brand | Nilight | | Brand Name | Nilight | | Coil Resistance | 100 Megaohms | | Coil Voltage | 12 Volts | | Connector Type | Through Hole | | Contact Current Rating | 30 Amps | | Contact Material | Copper | | Contact Type | Normally Closed | | Current Rating | 30 Amps | | Customer Reviews | 4.6 out of 5 stars 1,195 Reviews | | Global Trade Identification Number | 00812227032197 | | Included Components | 5 pack Waterproof Relay and Harness | | Item Type Name | Nilight 50044R 5 Pack Waterproof 40/30 AMP Heavy Duty 12 AWG Tinned Copper Wires 5-PIN SPDT Bosch Style 12V Automotive Relay and Harness Set,2 Year Warranty | | Manufacturer | Nilight | | Maximum Switching Current | 40 Amps | | Maximum Switching Voltage | 14 Volts | | Minimum Switching Voltage | 14 Volts | | Model | 50044R | | Mounting Type | Wall Mount | | Operation Mode | Manual | | Part Number | 50044R | | Specification Met | CE | | UPC | 812227032197 | | Unit Count | 5.0 Count | | Warranty Description | 2 Years Warranty | ## Product Details - **Connector Type:** Through Hole - **Contact Material:** Copper - **Contact Type:** Normally Closed - **Current Rating:** 30 Amps - **Mounting Type:** Wall Mount ## Images ![Waterproof 40/30 AMP Relay - Image 1](https://m.media-amazon.com/images/I/71PMNhBvihL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Can I get 6 waterproof relays with sockets? I need 2 each for 3 windows.** A: No **Q: will this work with 2010 hyundai santa fe passenger mirror relay? I'm getting a clicking/ knocking sound from the passenger mirror** A: the relay will not work for you, the relay is for horns, lights, plow equipment, or trailer brakes, the problem is , the internal system in the mirror is warn out, you need a new mirror, and that's about two hundred usd, and your mirror is ten years old **Q: Can this be used as a flasher?** A: Maybe not a "flasher" since there is a steady blue light at the end where the magnetic adapter rip fits, bit it does light up there. **Q: How many amps (at 12v) does the (+) switch pull to open the relay?** A: Ohms law I=E/R 12V/80 Ohms = 150mA or 0.15 Amps ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great weatherproof relays *by J***Y on February 15, 2026* These relays are a good price for the quality. Nice and sealed and havent had a issue. Highly recommend these ### ⭐⭐⭐⭐⭐ Relays for Caterpillar Skid Steer *by B***N on November 15, 2025* I was looking for less expensive relays for replacing relays on my CAT Skid Steer. These same relays are used for both engine starter relay and the glow plug relay on the skid steer. I paid about $37 for one relay at the CAT dealer, while this whole five pack of relays are way less than that. I was thinking these Nilight relays would be lower quality, but now I have a different opinion. I weighed the Nilight relay vs the well used, original CAT relay (sorry for the dirt and dust), and they were exactly the same. I tested one relay with a 9V battery, and they had a very solid, distinctive click when the relay contacts changed state. My ohmmeter confirmed the contacts changed state properly. I confirmed the CAT relay fit into the connector the same as the Nilight relay. It is a very tight fit, but that is due to the rubber gasket that prevents moisture intrusion. The icing on the cake is that these Nilight relays are a straight plug and play, no rewiring required. That rating for 10,000,000 cycles may be a stretch, but who knows, it is looking pretty good so far! ### ⭐⭐⭐⭐⭐ Resolved my issues with an older Fisher plow install *by H***T on December 22, 2025* Great 5 pack of relays and matching tails. I had old relays taped together running my Fisher plow lights. Weird light issues had me questioning these relays. These straightened out my concerns about cross wiring, and made the connections truly waterproof. Bam! Lights work correctly again. ## Frequently Bought Together - Nilight 50044R 5 Pack Waterproof 40/30 AMP Heavy Duty 12 AWG Tinned Copper Wires 5-PIN SPDT Bosch Style 12V Automotive Relay and Harness Set - Nilight 10 Pack NI-FH01 Inline Holder 14AWG Wiring Harness ATC/ATO 30AMP Blade Automotive Fuse Holder-10, 2 Years Warranty - Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty --- ## 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.ro/products/155789201-waterproof-40-30-amp-relay](https://www.desertcart.ro/products/155789201-waterproof-40-30-amp-relay) --- *Product available on Desertcart Romania* *Store origin: RO* *Last updated: 2026-07-09*