--- product_id: 184934785 title: "DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5)" brand: "teyleten robot" price: "£19.05" currency: GBP in_stock: true category: "Teyleten Robot" url: https://www.desertcart.co.uk/products/184934785-dc-1-channel-optocoupler-3v-3-3v-relay-high-level store_origin: GB region: United Kingdom --- # 10A high load capacity Optocoupler isolation for interference-free control Sub-20ms ultra-fast response DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5) **Brand:** teyleten robot **Price:** £19.05 **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your Arduino projects with relay power that never quits! ## Quick Answers - **What is this?** DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5) by teyleten robot - **How much does it cost?** £19.05 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/184934785-dc-1-channel-optocoupler-3v-3-3v-relay-high-level) ## Best For - teyleten robot enthusiasts ## Why This Product - Trusted teyleten robot brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Flexible Power Options:** Jumper caps let you choose shared or separate power supplies for ultimate control. - • **Powerhouse Performance:** Handles up to 10A at 250VAC/30VDC for heavy-duty switching. - • **Lightning-Fast Response:** Activates in under 20 milliseconds to keep your projects snappy. - • **Plug & Play Convenience:** Crimp terminal connectors and fixed mounting holes for effortless setup. - • **Interference-Proof Control:** Optocoupler isolation ensures your signals stay clean and reliable. ## Overview The Teyleten Robot DC 1 Channel Optocoupler Relay Module is a compact, high-performance 3V/3.3V control board designed for Arduino and microcontroller projects. Featuring a robust 10A load capacity at 250VAC/30VDC, optocoupler isolation for noise-free operation, and a rapid sub-20ms response time, this pack of 5 modules offers reliable, flexible, and easy-to-install switching solutions for professional-grade electronics control. ## Description We are Songle original relay Size: 70mm X17mm X20mm (LxWxH) - Main chip: EL817, SRD-DC03V-SL-C - Work voltage: DC 3V/3.3V - Control 10A 250VAC, 10A 30VDC load Features - Instructions with the signal output; - Signal input port can connect microcontroller IO port, high level signal - Double power selection design anti-interference ability is strong, photoelectric isolation protection of high reliability - Current wide detection range:DC0-25V input - A diode current protection - Response time is less than 20 milliseconds - Relay long life can absorb 100000 times continuously - External connection use spinning crimping terminal, make connection firmer - With fixed installation hole, convenient installation,High Level Trigger:The relay module is triggered by high level signal, which can be input from microcontroller IO,Jumper Caps:You are free to select whether the relay and the signal share the same power supply or not by removing the jumper caps on the pins or not. It is recommended to share the same power supply, because that is more convenient for using. ## Features - Original Songle Relay - 30VDC 250VAC Load：The power switch is compatible with 10A 250VAC and 10A 30VDC load. - Optocoupler Isolator:3V/3.3V power relay module supports photocoupler isolation control. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07XGZSYJV | | Best Sellers Rank | #29,225 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in Optocouplers | | Brand | Teyleten Robot | | Brand Name | Teyleten Robot | | Coil Voltage | 3.3 volts | | Connector Type | Crimp | | Contact Current Rating | 10 A | | Contact Material | Silver | | Contact Type | Normally Open | | Current Rating | 10 A | | Customer Reviews | 4.6 out of 5 stars 223 Reviews | | Item Weight | 0.27 g | | Manufacturer | Teyleten Robot | | Maximum Switching Current | 10 A | | Maximum Switching Voltage | 250 volts | | Minimum Switching Voltage | 3.3 volts | | Model | RK-S1B4-G97L | | Mounting Type | Panel Mount | | Number of Items | 5 | | Number of Terminals | 2 | | Operation Mode | Automatic | | Part Number | RK-S1B4-G97L | | Specification Met | cULus | | UPC | 724545020568 | | Unit Count | 5 Count | | Warranty Description | no | ## Product Details - **Connector Type:** Crimp - **Contact Material:** Silver - **Contact Type:** Normally Open - **Current Rating:** 10 A - **Mounting Type:** Panel Mount ## Images ![DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5) - Image 1](https://m.media-amazon.com/images/I/71vU7NaGpsL.jpg) ## Questions & Answers **Q: I'm still not clear with the jumpers are for. What does optoisolation do here?** A: There are a few reasons why you would use isolation here. By the way, jumpers are for isolation - although the top jumper is futile. To use the optoisolator, disconnect the bottom jumper and connect the left pin to ground for the signal coming in to the board and connect the right pin to the ground of the voltage that activates the relay. The VCC should be connected to the voltage source that operates the relay (or if you want to remove the top jumper, vcc goes to the right pin, however it is the same as leaving the jumper on and just wiring it to the vcc input on the board. - I have used this setup to run a bank of relays off of an esp32. This allows you to run many relays without any significant voltage drop on the esp32. You will need to provide an alternate vcc for the relays. Imagine running 15 relays off of the ESP32. That would possibly cause a voltage issue on the board. If all you need to do is run 15 tiny leds (I guess 30 if you include the indicator on the board) your voltage drop would be much much lower. Because this uses optoisolation, the circuit that sends the signal (usually a microcontroller) and the voltage that powers the relay, can be totally isolated. You could use a battery for one and a computer usb for the other - no common ground between the two. -- Not pointless by any means, but the circuit setup for this is goofy and causes you to scratch your head for a minute. **Q: Will 3v power the relay?** A: 3V ok **Q: I want to run this realy on a 2 AA battery box (3v total) do i need to do anything with jumpers?** A: No need to change, 3V ok **Q: I put 3.3v on vcc and grounded gnd. when i put 3.3v on in, the red led lights, but the relay doesn't close. is there something i'm missing here?** A: It should work. You are controlling a Transistor that is operating the relay. Make sure there is enough current in VCC to activate the relay. LED will light with only 1.3v and very little current. The relay must have 3.3V VCC. Also make sure your Arduino output line has the same ground as board. Using separate power supplies can cause the problem. Otherwise, I need more details about your connection. ## Frequently Bought Together - Teyleten Robot DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5) - AEDIKO 4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation, High or Low Level Trigger - 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 --- ## 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/184934785-dc-1-channel-optocoupler-3v-3-3v-relay-high-level](https://www.desertcart.co.uk/products/184934785-dc-1-channel-optocoupler-3v-3-3v-relay-high-level) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-11-04*