--- product_id: 38476907 title: "12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger" brand: "hiletgo" price: "£8.00" currency: GBP in_stock: true reviews_count: 10 category: "Hi Letgo" url: https://www.desertcart.co.uk/products/38476907-12v-4-channel-relay-module-with-opto-isolated-support-high store_origin: GB region: United Kingdom --- # 10A max current load 12V coil voltage SMD optocoupler isolation 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger **Brand:** hiletgo **Price:** £8.00 **Availability:** ✅ In Stock ## Summary > 🔴 Command your circuits with precision and confidence! ## Quick Answers - **What is this?** 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger by hiletgo - **How much does it cost?** £8.00 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/38476907-12v-4-channel-relay-module-with-opto-isolated-support-high) ## Best For - hiletgo enthusiasts ## Why This Product - Trusted hiletgo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Opto-Isolated Safety:** SMD optocoupler isolation ensures stable, interference-free operation. - • **User-Friendly Design:** Screw terminal connectors and clear LED indicators for easy setup and monitoring. - • **Powerhouse Performance:** Handles up to 10A at 250V AC/30V DC for robust switching. - • **Dual Trigger Flexibility:** Supports both high and low level triggers for versatile control. - • **Fault-Tolerant Reliability:** Failsafe design prevents relay activation if control line breaks, ensuring peace of mind. ## Overview The HiLetgo 12V 4 Channel Relay Module features a durable 10A relay with SMD optocoupler isolation, supporting both high and low level triggers. Designed for professional-grade control, it offers screw terminal connectors, LED status indicators, and a fault-tolerant design to ensure reliable and flexible operation in complex electrical projects. ## Description 12V 4 Channel Relay Module With OPTO-Isolated Support High and Low Level Trigger Description : 1. The module uses genuine quality relay , normally open interfaces Maximum load : AC 250V/10A, DC 30V/10A; 2. Using SMD OPTOCOUPLER isolation , driving ability , stable performance ; trigger current 5mA; 3. The module voltage is 12V; 4. Each way module can be set high or low triggered by jumper ; 5. Fault-tolerant design , even if the control line is broken , the relay will not operate ; 6. The power indicator ( green ) , 4 relay status indicator ( red ) 7. Interface design humane, all interfaces can be connected directly via terminal wiring leads , very convenient 8. Module size : 73mm * 50mm * 18.5mm ( L * W * H ) 9. Has four mounting bolts holes , hole 3.1mm, 67mm * 44.5mm pitch Interface : 1. DC +: positive power supply ( voltage required by the relay , there 5V.9V.12V and 24V choice ) 2. DC-: negative power connection 3. IN1-IN4: each way based on the settings , can be high or low to control the corresponding relay outputs : a 12- line interface, the interface can be directly connected to all leads , user-friendly 1. NO1 - NO4: normally open relay interfaces , relay before the vacant after the pull shorted with COM 2. COM1 - COM4 Common Interface Relays 3. NC1 - NC4: normally closed relay interface relay shorted with COM ago , after the pull- vacant High and low trigger selection : 1.S1-S4 in order to relay a way -4 road high and low trigger selection ; 2.Com with low short circuit , triggering the corresponding relay is low , while the high end of the short com high trigger ## Features - HiLetgo 12V 4 Channel Relay Module - Using SMD OPTOCOUPLER isolation - High and Low Level Trigger ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00LW2GM84 | | Best Sellers Rank | #53,692 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #12 in Solid State Relays | | Brand | HiLetgo | | Brand Name | HiLetgo | | Coil Voltage | 12 Volts | | Connector Type | Screw | | Contact Current Rating | 10 Amps | | Contact Material | Lead | | Contact Type | Normally Closed, Normally Open | | Current Rating | 10 Amps | | Customer Reviews | 4.5 out of 5 stars 171 Reviews | | Manufacturer | HiLetgo | | Maximum Switching Current | 10 Amps | | Maximum Switching Voltage | 250 Volts | | Model | 3-01-0371 | | Mounting Type | Screw Mount | | Operation Mode | Automatic | | Part Number | 3-01-0371 | | UPC | 702082656167 | | Unit Count | 4.0 Count | | Wattage | 60 Milliwatts | ## Product Details - **Connector Type:** Screw - **Contact Material:** Lead - **Contact Type:** Normally Closed, Normally Open - **Current Rating:** 10 Amps - **Mounting Type:** Screw Mount ## Images ![12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger - Image 1](https://m.media-amazon.com/images/I/719VuX-GPfL.jpg) ![12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger - Image 2](https://m.media-amazon.com/images/I/6150CqESUsL.jpg) ![12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger - Image 3](https://m.media-amazon.com/images/I/61pamH+DvOL.jpg) ![12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger - Image 4](https://m.media-amazon.com/images/I/61f7OQJqs6L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***E on February 2, 2026* ### ⭐⭐⭐⭐⭐ Review *by J***D on August 18, 2025* ### ⭐⭐⭐⭐ Review *by K***R on May 15, 2024* ## Frequently Bought Together - HiLetgo 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger - HiLetgo 12V 8 Channel Relay Module with OPTO-Isolated High and Low Level Trigger 8 Ways Relay Switch Module for Arduino - HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V --- ## 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/38476907-12v-4-channel-relay-module-with-opto-isolated-support-high](https://www.desertcart.co.uk/products/38476907-12v-4-channel-relay-module-with-opto-isolated-support-high) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-22*