--- product_id: 88295300 title: "Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module,3v Logic Level Boards,Raspberry Pi 3.3v Application" brand: "eagles" price: "€ 41.51" currency: EUR in_stock: true reviews_count: 7 url: https://www.desertcart.pt/products/88295300-eagles-5pcs-1-channel-3v-relay-module-with-optocoupler-esp8266 store_origin: PT region: Portugal --- # 3V Power Optocoupler Isolation 20ms Response Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module,3v Logic Level Boards,Raspberry Pi 3.3v Application **Brand:** eagles **Price:** € 41.51 **Availability:** βœ… In Stock ## Summary > πŸ”Œ Power Up Your Projects with Precision! ## Quick Answers - **What is this?** Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module,3v Logic Level Boards,Raspberry Pi 3.3v Application by eagles - **How much does it cost?** € 41.51 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/88295300-eagles-5pcs-1-channel-3v-relay-module-with-optocoupler-esp8266) ## Best For - eagles enthusiasts ## Why This Product - Trusted eagles brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Solid Connections:** Rotary crimping terminals ensure robust wiring for peace of mind. - β€’ **Versatile Control:** AC250V 10A and DC30V 10A options with jumper-selectable contacts. - β€’ **Swift Response Time:** React in less than 20 milliseconds for seamless automation. - β€’ **Unmatched Reliability:** Experience high anti-interference with dual power supply input. - β€’ **Long-lasting Performance:** Enjoy a relay life of up to 100,000 cyclesβ€”built to last. ## Overview The Eagles 5pcs 1 Channel 3V Relay Module is designed for seamless integration with ESP8266 and Raspberry Pi applications. It features photocoupler isolation for enhanced control, dual power supply inputs for superior reliability, and a swift response time of under 20 milliseconds. With a long relay life and robust wiring options, this module is perfect for both hobbyists and professionals looking to elevate their automation projects. ## Description Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module,3v Logic Level Boards,Raspberry Pi 3.3v Application ## Features - 1. 3V 1-Channel Relay interface board support photocoupler isolation control,has the output signal indicator,the signal input port can connect SCM IO port, high level signal drive - 2. Support dual power supply input ensure high anti-interference ability,high reliability of photoelectric isolation protection - 3. With diode continuous flow protection,response time is less than 20 milliseconds,long life of relay can be absorbed 100,000 times continuously - 4. The external connection uses the rotary crimping terminal, causes the wiring to be more solid. - 5. Equiped with high-current relay, AC250V 10A ; DC30V 10A,each relay has normally open and normally closed contact. Can be selected by jumper relay and TTL or ground. ## Images ![Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module,3v Logic Level Boards,Raspberry Pi 3.3v Application - Image 1](https://m.media-amazon.com/images/I/71dVDQWafWL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best Relay Solution for 3.3v Controllers/Rasp Pi's *by J***R on October 24, 2019* Received these on a same-day Amazon delivery, and tested them using an Adafruit Feather ESP32, which can be powered through its micro-USB plug, or an attached Li-Poly battery. The relay clicked very robustly with either power source, so it gets 5 stars from me.As is typical with this kind of product, zero documentation, and the website printed on the bottom of the board was invalid. But it was easy enough to figure out: connect GND to GND, VCC to 3.3v on controller, and IN to control pin on controller. There are two jumper pins installed on the board, and if you leave them in place, the relay coil gets its power from the controller, but you lose controller opto-isolation from the controlled voltage on the relay, which could be up to 250v AC. To gain the opto-isolation, remove the jumpers and power the relay coil from a separate 3.3v source, using the exposed connector pins nearest the blue relay (unmarked, but polarity is important). I chose to leave the jumpers in place, as I have done with similar products in the past, with no bad consequences.As always with relay products like this, if you're switching high voltages, be very careful handling this device. The terminal block screws, in particular, are at full controlled voltages. Turn off all power off before making changes. ### ⭐⭐⭐⭐ Great for projects with a wall power supply; batteries, no way *by C***K on February 17, 2020* I don't remember exactly how much since I didn't write it down, but this draws several 10s of mA while switched on. It works well enough for short bursts or for anything powered from a wall outlet, but I cannot recommend it for use with battery-powered projects. Also since this is a mechanical relay it cannot be switched often or you will ruin it quickly. If you need something that switches on and off often and consumes little power, try something like a logic-level NPN MOSFET. ### ⭐⭐⭐⭐⭐ Works as described *by J***. on March 21, 2020* Happy with this product. I use it to turn on a light using an ESP 8266. The relay so far it works flawlessly. I will eventually use the others for other projects coming up. very good value. ## Frequently Bought Together - Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module,3v Logic Level Boards,Raspberry Pi 3.3v Application - 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 - EDGELEC 120pcs Breadboard Jumper Wires 10cm 15cm 20cm 30cm 40cm 50 cm 100cm Wire Length Optional Dupont Cable Assorted Kit Male to Female Male to Male Female to Female Multicolored Ribbon Cables --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/88295300-eagles-5pcs-1-channel-3v-relay-module-with-optocoupler-esp8266](https://www.desertcart.pt/products/88295300-eagles-5pcs-1-channel-3v-relay-module-with-optocoupler-esp8266) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-18*