--- product_id: 275032137 title: "6 Pack - 12V DC 40/30 Amp 5-Pin SPDT Automotive Relay Harness Set (Bosch Style with Interlocking Harnesses)" brand: "online led store" price: "฿3390" currency: THB in_stock: true reviews_count: 5 category: "Online Led" url: https://www.desertcart.co.th/products/275032137-6-pack-12v-dc-40-30-amp-5-pin-spdt store_origin: TH region: Thailand --- # 40A/30A high switching power 5-pin SPDT Bosch-style relay Interlocking harness for neat cable management 6 Pack - 12V DC 40/30 Amp 5-Pin SPDT Automotive Relay Harness Set (Bosch Style with Interlocking Harnesses) **Brand:** online led store **Price:** ฿3390 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your ride with pro-grade relays that keep you ahead of the curve! ## Quick Answers - **What is this?** 6 Pack - 12V DC 40/30 Amp 5-Pin SPDT Automotive Relay Harness Set (Bosch Style with Interlocking Harnesses) by online led store - **How much does it cost?** ฿3390 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/275032137-6-pack-12v-dc-40-30-amp-5-pin-spdt) ## 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 - • **Built to Last:** Heavy-duty 14AWG wires for superior durability and stable connections - • **Tidy Tech Setup:** Interlocking harness design keeps wiring organized and hassle-free - • **Versatile Wiring:** Color-coded leads simplify installation and customization for any project - • **Plug & Play Precision:** Bosch-style 5-pin SPDT relay ensures reliable, industry-standard performance - • **Power Up with Confidence:** Handles up to 40A/30A for heavy-duty automotive demands ## Overview The ONLINE LED STORE 6 Pack 12V DC 40/30 Amp 5-Pin SPDT Automotive Relay Harness Set features Bosch-style relays with high switching capacity, interlocking harnesses for organized wiring, and heavy-duty 14AWG pre-wired leads. Perfect for automotive enthusiasts and professionals seeking reliable, durable relay solutions for complex electrical setups. ## Description ONLINE LED STORE 6 Pack - 12V DC 40/30 Amp 5-Pin SPDT Automotive Relay Harness Set (Bosch Style with Interlocking Harnesses) : desertcart.ae: Automotive Review: a must for hotrod projects these are a good unit Review: Electronic items can be a gamble when you go cheap. I was afraid that purchasing these at this price would not yield good results. The positive reviews definitely bolstered my belief that I'd be fine, but after installing 5 out of 6 relays I am a believer. I would not hesitate to purchase these again. Matter of fact, I am likely to get more of these in the near future. Great item! I used these relays in conjunction with a keyless entry module to install in my older vehicle that did not come with keyless entry. Long story short, I wanted to separate the driver's side door power lock motor to be isolated from the other door locks in order to have it unlocked separately. These relays helped to separate and isolate the driver's side door lock motor. They have been working for over a week with no issues. Based on other reviews I have no concerns that these will not continue to function as they are suppose to. ## Features - User Manual available for download under Product Information Details - Bosch style 12VDC (14V Max) 5-Pin SPDT (Single Pole Double Throw) Relay with 40A/30A High Switching Capability. - Interlocking design relay socket harness base for easy cable management & organization. - Heavy duty 14AWG wires for the main contact and pre-wired with 6" pigtail leads. - 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 | B01KVZ2MU4 | | Best Sellers Rank | #45,557 in Automotive ( See Top 100 in Automotive ) #12 in Automotive Starter Relays | | Item model number | 13 | | Manufacturer | ONLINE LED STORE | | Product Dimensions | 14.61 x 13.34 x 4.11 cm; 426.38 g | ## Product Details - **Connector type:** Solder - **Contact material:** Silver Tin Oxide - **Contact type:** Normally Closed, Normally Open, spdt - **Current rating:** 30 Amps - **Mounting type:** Socket Mount ## Images ![6 Pack - 12V DC 40/30 Amp 5-Pin SPDT Automotive Relay Harness Set (Bosch Style with Interlocking Harnesses) - Image 1](https://m.media-amazon.com/images/I/81LaRdbapRL.jpg) ## Questions & Answers **Q: How many millamps does the coil draw at 12 volt or what is the ohm of the coil ?** A: The trigger uses a load of ~150 milliamp while the coil has a max resistance of 100 milliohm. Hope this helps. **Q: Do these have a built in diode?** A: Not for the led that is determined by the wattage of the bulb a 12 volt led 1156 should have the diode built in it. **Q: Can you leave the relay energized for long periods of time? I want to connect to the 'load' circuit on a solar panel controller.** A: The load would have a big affect on how long it can run. I have LED running lights wired in on my motorcycle which are on all the time so they can be lit for many hours at a time. So far I have not had any issues with these relays. A low load through the contact would allow it to be energized forever theoretically. **Q: What gauge is the wires I need 12 gauge but I have found normally they are only 14 gauge** A: On the set just received, three wires are 14 GA. (power and N.O. and N.C. wires). The other two wires (coil trigger) are 18 GA. rather than 16 GA. as indicated in one of the photographs........... also wish vendor supplied operation cycle rating, I know the rating is higher with a 30 amp load vs. a 40 amp load, but are we talking about 200,000 total cycles @30 amps or something drastically LESS???? ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***S on 15 April 2022* a must for hotrod projects these are a good unit ### ⭐⭐⭐⭐⭐ Review *by A***M on 17 September 2019* Electronic items can be a gamble when you go cheap. I was afraid that purchasing these at this price would not yield good results. The positive reviews definitely bolstered my belief that I'd be fine, but after installing 5 out of 6 relays I am a believer. I would not hesitate to purchase these again. Matter of fact, I am likely to get more of these in the near future. Great item! I used these relays in conjunction with a keyless entry module to install in my older vehicle that did not come with keyless entry. Long story short, I wanted to separate the driver's side door power lock motor to be isolated from the other door locks in order to have it unlocked separately. These relays helped to separate and isolate the driver's side door lock motor. They have been working for over a week with no issues. Based on other reviews I have no concerns that these will not continue to function as they are suppose to. ### ⭐⭐⭐⭐⭐ Review *by D***M on 15 August 2025* This is the third time I’ve ordered these, and they work great! The sockets have what appears to be 14 gauge wires for the coil, and 12 gauge wire for the contacts. The sockets interlock, allowing the user to chain as many relays as desired together. I use them to make converters for trailer taillights. ## Frequently Bought Together - True MODS 6 Pack Bosch Style 5-Pin 12V Relay Kit [Interlocking Harness Socket Holder] [14 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Relays for Auto Fan Cars - irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness - Heavy Duty 12 AWG Tinned Copper Wires, 5-PIN SPDT Automotive Relay - 10 Pack 14 AWG Inline Fuse Holder - 12V-DC ATC/ATO 14 Gauge Fuse Holder for 15A Blade Fuse --- ## 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.th/products/275032137-6-pack-12v-dc-40-30-amp-5-pin-spdt](https://www.desertcart.co.th/products/275032137-6-pack-12v-dc-40-30-amp-5-pin-spdt) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-22*