--- product_id: 49389848 title: "12V Automotive Changeover Relay 40A with Socket Holder" brand: "meishuo" price: "VT3403" currency: VUV in_stock: true reviews_count: 2 category: "Meishuo" url: https://www.desertcart.vu/products/49389848-12v-automotive-changeover-relay-40a-with-socket-holder store_origin: VU region: Vanuatu --- # 12V Automotive Changeover Relay 40A with Socket Holder **Brand:** meishuo **Price:** VT3403 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** 12V Automotive Changeover Relay 40A with Socket Holder by meishuo - **How much does it cost?** VT3403 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/49389848-12v-automotive-changeover-relay-40a-with-socket-holder) ## Best For - meishuo enthusiasts ## Why This Product - Trusted meishuo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Automotive changeover relay with 5-pins and matching socket, suitable for general purpose automotive uses with a 40A switching capability. The relay has NO and NC contacts and has a high quality sealed construction with a plastic mounting bracket. Review: Exactly what was needed - Exactly what was needed. Review: Simple enough but does the job quite nicely. - When it comes down to it, it's only a changeover relay like so many others that can be bought from a variety of car stores etc. However, it's a well enough made item that might be at least a little bit resistant to the lighter splashes and general messiness that can exist even in reasonably well protected places under a car's bonnet. It's also nice to have a plug that fits on to it (rather than using individual spade connectors) because this gives the job a more professional look once everything is wired up. I saw a comment saying that sometimes these don't have the wiring diagram printed on them and that someone wasn't sure what the middle terminal was for. Just like the picture, mine did have the diagram printed on the top and wiring is with standard relay terminals. Even if the circuit diagram is not printed on top, there should be little numbers embossed onto the plastic beside each terminal. Terminals are: 85: connects to the low-current switched source on the vehicle (e.g. the power feed to headlamps/horn/whatever) 86: To earth/car body (completes the circuit from 85 to switch on the relay) 30: High current source (e.g. direct from battery with in line fuse) 87: high current line to new accessory (e.g. spot lamps/air horn/whatever) 87a is on when there is no current coming from 85 and off when there is. If the relay is not being used as a changeover, this terminal does not need to be connected (although you can just get a switch relay with no terminal 87a) ## Features - General Purpose Automotive Relay with matching holder - Switching Capability: 40A - Sealed IP67 Construction - NO / NC Contacts - Plastic mounting bracket and wire harness ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B013F9RLM2 | | Best Sellers Rank | 334,625 in Automotive ( See Top 100 in Automotive ) 1,409 in Car Relays | | Brand | Meishuo | | Coil Voltage | 12 Volts | | Connector Type | Quick Connect | | Contact Current Rating | 40 Amps | | Contact Material | Copper Alloy | | Contact Type | Normally Open | | Country Of Origin | China | | Current Rating | 40 Amps | | Customer Reviews | 4.9 4.9 out of 5 stars (10) | | Included Components | Relay and harness | | Manufacturer | Meishuo | | Manufacturer Part Number | 996831 | | Mounting Type | Socket Mount | | Operation Mode | 12v | | Specification Met | RoHS | | Wattage | 1.6 watts | ## Product Details - **Connector type:** Quick Connect - **Contact material:** Copper Alloy - **Contact type:** Normally Open - **Current rating:** 40 Amps - **Mounting type:** Socket Mount ## Images ![12V Automotive Changeover Relay 40A with Socket Holder - Image 1](https://m.media-amazon.com/images/I/41yu8dfV4IL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Exactly what was needed *by J***S on 10 December 2025* Exactly what was needed. ### ⭐⭐⭐⭐ Simple enough but does the job quite nicely. *by E***Y on 16 July 2016* When it comes down to it, it's only a changeover relay like so many others that can be bought from a variety of car stores etc. However, it's a well enough made item that might be at least a little bit resistant to the lighter splashes and general messiness that can exist even in reasonably well protected places under a car's bonnet. It's also nice to have a plug that fits on to it (rather than using individual spade connectors) because this gives the job a more professional look once everything is wired up. I saw a comment saying that sometimes these don't have the wiring diagram printed on them and that someone wasn't sure what the middle terminal was for. Just like the picture, mine did have the diagram printed on the top and wiring is with standard relay terminals. Even if the circuit diagram is not printed on top, there should be little numbers embossed onto the plastic beside each terminal. Terminals are: 85: connects to the low-current switched source on the vehicle (e.g. the power feed to headlamps/horn/whatever) 86: To earth/car body (completes the circuit from 85 to switch on the relay) 30: High current source (e.g. direct from battery with in line fuse) 87: high current line to new accessory (e.g. spot lamps/air horn/whatever) 87a is on when there is no current coming from 85 and off when there is. If the relay is not being used as a changeover, this terminal does not need to be connected (although you can just get a switch relay with no terminal 87a) --- ## 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.vu/products/49389848-12v-automotive-changeover-relay-40a-with-socket-holder](https://www.desertcart.vu/products/49389848-12v-automotive-changeover-relay-40a-with-socket-holder) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-17*