--- product_id: 7893757 title: "HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V" brand: "hiletgo" price: "B/.31" currency: PAB in_stock: true reviews_count: 13 category: "Hi Letgo" url: https://www.desertcart.com.pa/products/7893757-hiletgo-2pcs-dc-12v-2-channel-relay-module-with-isolated store_origin: PA region: Panama --- # 12V DC coil voltage 10A max switching current Optocoupler isolation HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V **Brand:** hiletgo **Price:** B/.31 **Availability:** ✅ In Stock ## Summary > ⚡ Power your projects with precision and peace of mind! ## Quick Answers - **What is this?** HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V by hiletgo - **How much does it cost?** B/.31 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/7893757-hiletgo-2pcs-dc-12v-2-channel-relay-module-with-isolated) ## 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 - • **Robust 10A Load Capacity:** Handles up to 250V AC or 30V DC at 10 amps, perfect for demanding industrial and home automation tasks. - • **Fail-Safe Fault Tolerance:** Relay remains inactive even if control lines break, protecting your system from unintended activations. - • **Dual-Channel Power Control:** Seamlessly switch two circuits with independent high/low trigger settings for ultimate customization. - • **Isolated Optocoupler Design:** Ensures stable, noise-free operation by electrically separating control and power circuits—safety meets precision. - • **User-Friendly Terminal Interface:** Direct screw terminal connections and jumper-configurable triggers make installation and adjustments effortless. ## Overview The HiLetgo 2pcs DC 12V 2 Channel Relay Module features isolated optocouplers for stable, noise-free switching, supports high or low level triggers via jumper settings, and can handle up to 10A at 250V AC or 30V DC. Designed with convenient screw terminals and fault-tolerant circuitry, it’s ideal for professional-grade home automation and industrial control applications. ## Description Description : 1. The module uses genuine quality relay , normally open interfaces Maximum load : AC 250V/10A, DC 30V/10A; 2. The power indicator (green) , relay status indicator (red) 3. Module size : 50mm * 26mm * 18.5mm (L * W * H) 4. Has four mounting bolts holes , hole 3.1mm, 44.5mm * 20.5mm pitch Module Interface: 1. DC +: positive power supply DC 12V 2. DC-: negative power connection 3. IN1: 1 channel signal to trigger the end , you can set a high or low level control relay 4. IN2: 2 -channel signal to trigger the end , you can set a high or low level control relay Relay Outputs: 1. NO1: After a relay normally open interfaces , relay before floating, shorted pull with COM1 2. COM1: 1 relay common interface 3. NC1: 1 relay normally closed port, COM1 relay shorted before and after the pull- vacant4. NO2:way normally open relay interface, the relay before floating , pull back and COM2 short 5. COM2: 2 Common Interface relay 6. NC2: 2 -way normally closed relay interface relay short front and COM2 , pull vacant post Note:This relay will be triggered by DC 12V, can not trigger with the arduino signal at 5V. Package Included:2*DC 12V 2 Channel Relay Module With Isolated Optocoupler High and Low Level Trigger Review: Useful for home theater automation - My Sony projector activated either 12V trigger A, or 12V trigger A+B, depending on the aspect ratio selected. I needed to change the second trigger function to be only B so that the wide screen would descend but the regular screen would retract. Some basic jumpering created the logic I needed and it has worked flawlessly for 6 years. I powered it from a separate PSU but don't remember why. Maybe the current on trigger A was too weak. Review: Great optical isolation of control & power - These are great relay assemblies. The fact they operate on the presence of + or - 12VDC and do not draw current on the signaling circuit is ideal for my application. I needed to control a pump with a negative lead signal and return a positive lead signal to the control board to activate an LED pump run indication. This device let me switch the pump and generate the positive signal for the LED. Very happy so far. ## Features - Can set high or low level trigger with jumper, to meet the demand of more trigger applications; - With patch optical isolation, strong drive ability and stable performance; - The module can be high or low by a jumper setting trigger; - Interface design humane, all interfaces can be connected directly via terminal wiring leads , very convenient ; - Fault-tolerant design , even if the control line is broken , the relay will not operate ; ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00LW15F42 | | Best Sellers Rank | #57,126 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #29 in Electromechanical Relays | | Brand | HiLetgo | | Brand Name | HiLetgo | | Coil Voltage | 12 Volts | | Connector Type | Screw | | Contact Current Rating | 10 Amps | | Contact Material | Silver | | Contact Type | Normally Open | | Current Rating | 10 Amps | | Customer Reviews | 4.5 out of 5 stars 512 Reviews | | Item Weight | 0.11 Pounds | | Manufacturer | HiLetgo | | Maximum Switching Current | 10 Amps | | Maximum Switching Voltage | 250 Volts | | Model | 3-01-0342 | | Mounting Type | PCB Mount | | Operation Mode | Manual | | Part Number | 3-01-0342 | | UPC | 702082655962 | | Unit Count | 2.0 Count | | Wattage | 50 watts | ## Product Details - **Connector Type:** Screw - **Contact Material:** Silver - **Contact Type:** Normally Open - **Current Rating:** 10 Amps - **Mounting Type:** PCB Mount ## Images ![HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V - Image 1](https://m.media-amazon.com/images/I/71rOVzcwzIL.jpg) ## Questions & Answers **Q: So on "low" the relay triggers when the signal voltage falls below 12v? and "hi" when the signal rises above 12v? can you tune the trigger voltage?thx** A: If you set it to "High" then the relay trips when there is + 12V on INT1 or INT 2. (+12 as in the positive side of the power source) If you set to low, it will trip when their is -12v (technically 0 volts) on INT 1 or INT2 (-12 as in the negative side of the power source) **Q: These are locking in the triggered position (Red light on), even with no trigger voltage. Any ideas, did I get bad ones?** A: When you say no trigger voltage, do you mean that no wires connected? If so then you may have gotten a bad set. Otherwise, check the jumper pins next to the trigger input. See if it set to low. **Q: What is the minimum to maximum voltage for both the low and high?** A: Minimum voltage that will trigger high: 2.5V Maximum voltage that will trigger low: (Vsupply- 2.5V) Measured this with Vsupply values of 12.2V and 13.6V. Used UNI-T UT61E multimeter for voltage measurements. **Q: are these latching relays?** A: No. They have normally open and normally closed contact points and will flip to the normally closed position when the trigger stops. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Useful for home theater automation *by M***N on February 16, 2026* My Sony projector activated either 12V trigger A, or 12V trigger A+B, depending on the aspect ratio selected. I needed to change the second trigger function to be only B so that the wide screen would descend but the regular screen would retract. Some basic jumpering created the logic I needed and it has worked flawlessly for 6 years. I powered it from a separate PSU but don't remember why. Maybe the current on trigger A was too weak. ### ⭐⭐⭐⭐⭐ Great optical isolation of control & power *by K***. on October 28, 2025* These are great relay assemblies. The fact they operate on the presence of + or - 12VDC and do not draw current on the signaling circuit is ideal for my application. I needed to control a pump with a negative lead signal and return a positive lead signal to the control board to activate an LED pump run indication. This device let me switch the pump and generate the positive signal for the LED. Very happy so far. ### ⭐⭐⭐⭐⭐ Great price and worked for me *by A***M on January 25, 2026* These relays function as expected. Installation was straightforward for my project, and I've had no issues during two years of use. ## Frequently Bought Together - HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V - AEDIKO 4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level - HiLetgo 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger --- ## 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.com.pa/products/7893757-hiletgo-2pcs-dc-12v-2-channel-relay-module-with-isolated](https://www.desertcart.com.pa/products/7893757-hiletgo-2pcs-dc-12v-2-channel-relay-module-with-isolated) --- *Product available on Desertcart Panama* *Store origin: PA* *Last updated: 2026-07-07*