--- product_id: 224495552 title: "5V 30A 2 Channel High and Low Level Trigger Relay Module Intelligent Home PLC Automation Control Compatible with Arduino" brand: "haljia" price: "¥5029" currency: JPY in_stock: true reviews_count: 7 category: "Haljia" url: https://www.desertcart.jp/products/224495552-5v-30a-2-channel-high-and-low-level-trigger-relay store_origin: JP region: Japan --- # 30A high power relay Dual channel control Optocoupler isolation 5V 30A 2 Channel High and Low Level Trigger Relay Module Intelligent Home PLC Automation Control Compatible with Arduino **Brand:** haljia **Price:** ¥5029 **Availability:** ✅ In Stock ## Summary > ⚙️ Automate smarter, not harder — power your projects with precision! ## Quick Answers - **What is this?** 5V 30A 2 Channel High and Low Level Trigger Relay Module Intelligent Home PLC Automation Control Compatible with Arduino by haljia - **How much does it cost?** ¥5029 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/224495552-5v-30a-2-channel-high-and-low-level-trigger-relay) ## Best For - haljia enthusiasts ## Why This Product - Trusted haljia brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Channel Control:** Manage two independent circuits simultaneously with high/low level triggers. - • **User-Friendly Design:** Clear LED relay indicators and black 9500 terminal for hassle-free wiring. - • **Interference Immunity:** Built-in optocoupler isolation ensures rock-solid signal integrity. - • **Powerhouse Performance:** Handles up to 30A load effortlessly for heavy-duty automation. - • **Versatile Compatibility:** Seamlessly integrates with Arduino, PLCs, and IoT systems for smart automation. ## Overview This 5V 30A dual-channel relay module features a robust double-sided PCB, optocoupler isolation for interference resistance, and LED indicators for real-time status. Designed for seamless integration with Arduino, PLCs, and IoT devices, it supports high-current loads up to 900W, making it ideal for intelligent home automation and industrial control. ## Description Feature: Adopt double-sided PCB board, the whole module layout is reasonable and beautiful. Control load with high power relay up to 30A. Each channel is equipped with optocoupler isolation and strong anti-interference ability. Black 9500 terminal, more convenient, high current wiring. Each channel has a relay-on switch LED indication, and the continuity is clearly visible. Control zone and load zone have isolation slots. Applied to PLC automation equipment control, industrial system control, Internet of Things control, home intelligent control, electronic enthusiast development experiments, various circuit modification, etc. Parameter: 05V low level trigger module: 0-2V DC relay is turned on (0N), 3-5V DC relay is turned off (OFF) 05V high level trigger module: 3.3-5V DC relay is on (0N), 0-2.5V DC relay is off (0FF) Supply voltage: 5V Quiescent Current: 5mA Load voltage: DC 30V or AC 250V Load current: 30A Relay life: more than 100,000 times Size: 70 x 72 x 22mm Weight: 90.5g Packing List: 1 x Relay Module Review: Does not work - No instructions of any kind. Found what others had said to work out jumpers - BUT it does not work. It does not function with Arduino, despite what the description says. When the jumper for S1 or S2 is set COM to LOW, there is ~4V on the input, and the Arduino cannot sink or source the current to overcome this voltage and bring it down to 0. I tried shorting the S1 input to ground - which should turn the relay on, but it does not. The LED for S1 flashes briefly brightly then goes dim - looks like a fault unit Review: Need to add a jumper for each channel - I like this robust 2 channel relay with NO and NC connectors.All the connections are well marked in both English and Chinese. You have to add a jumper (not supplied) to the jumper pins alongside the 5Volt power supply connectors. See the picture: this yellow yumper activates the Hi voltage (2.5 to 5V) range to the trigger on the second relay.. So: for a 5v trigger you need to short between the COMmon pin and the Hi pin for each of the relays that you want to use. For a below 2.5V trigger you need to place a jumper between the COMmon pin and the LOW pin for each of the relays. You can use a low trigger on one relay and a high trigger on the other relay. But obviously you use either Low or High for each relay, not both! ## Features - Adopt double-sided PCB board, the whole module layout is reasonable and beautiful. Control load with high power relay up to 30A. - Each channel is equipped with optocoupler isolation and strong anti-interference ability. - Black 9500 terminal, more convenient, high current wiring. - Each channel has a relay-on switch LED indication, and the continuity is clearly visible. Control zone and load zone have isolation slots. - Applied to PLC automation equipment control, industrial system control, Internet of Things control, home intelligent control, electronic enthusiast development experiments, various circuit modification, etc. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07QN5H6B1 | | Best Sellers Rank | 92,983 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 247 in Electromechanical Relays | | Brand | HALJIA | | Coil Voltage | 5 Volts | | Connector Type | Screw | | Contact Current Rating | 30 Amps | | Contact Type | Normally Closed | | Country Of Origin | China | | Current Rating | 30 Amps | | Customer Reviews | 3.3 3.3 out of 5 stars (18) | | Item Weight | 90.5 Grams | | Manufacturer | HALJIA | | Manufacturer Part Number | ADN1903022 | | Mounting Type | DIN Rail Mount | | Number of Terminals | 2 | | Operation Mode | Manual | | Specification Met | Basic Specifications Met | | UPC | 798863213513 | | Wattage | 900 watts | ## Product Details - **Brand:** HALJIA - **Connector type:** Screw - **Contact type:** Normally Closed - **Current rating:** 30 Amps - **Mounting type:** DIN Rail Mount ## Images ![5V 30A 2 Channel High and Low Level Trigger Relay Module Intelligent Home PLC Automation Control Compatible with Arduino - Image 1](https://m.media-amazon.com/images/I/71vDp3N0hIS.jpg) ## Customer Reviews ### ⭐ Does not work *by T***E on 12 August 2024* No instructions of any kind. Found what others had said to work out jumpers - BUT it does not work. It does not function with Arduino, despite what the description says. When the jumper for S1 or S2 is set COM to LOW, there is ~4V on the input, and the Arduino cannot sink or source the current to overcome this voltage and bring it down to 0. I tried shorting the S1 input to ground - which should turn the relay on, but it does not. The LED for S1 flashes briefly brightly then goes dim - looks like a fault unit ### ⭐⭐⭐⭐⭐ Need to add a jumper for each channel *by M***R on 4 April 2021* I like this robust 2 channel relay with NO and NC connectors.All the connections are well marked in both English and Chinese. You have to add a jumper (not supplied) to the jumper pins alongside the 5Volt power supply connectors. See the picture: this yellow yumper activates the Hi voltage (2.5 to 5V) range to the trigger on the second relay.. So: for a 5v trigger you need to short between the COMmon pin and the Hi pin for each of the relays that you want to use. For a below 2.5V trigger you need to place a jumper between the COMmon pin and the LOW pin for each of the relays. You can use a low trigger on one relay and a high trigger on the other relay. But obviously you use either Low or High for each relay, not both! ### ⭐⭐⭐⭐⭐ Review *by R***O on 3 October 2024* Tutto ok ## Frequently Bought Together - HALJIA 5V 30A 2 Channel High and Low Level Trigger Relay Module Intelligent Home PLC Automation Control Compatible with Arduino - ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects - ELEGOO UNO R3 Board for Arduino with USB Cable(Arduino-Compatible) More Faster In Transfer Rates And Better At Storage And Operation --- ## 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.jp/products/224495552-5v-30a-2-channel-high-and-low-level-trigger-relay](https://www.desertcart.jp/products/224495552-5v-30a-2-channel-high-and-low-level-trigger-relay) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-05*