{"product_id":"2-channel-10a-optoisolated-power-relay-module-5v-control","title":"2-Channel 5V SPDT Power Relay Module with Optocoupler Isolation — 250V\/10A — Arduino, ESP32, Raspberry Pi Compatible","description":"\u003ch2\u003e📋 Overview\u003c\/h2\u003e\n\u003cp\u003eThe 2-Channel 5V Relay Module with Optocoupler Isolation lets you safely control high-voltage or high-current devices — such as lamps, fans, heaters, pumps, solenoid locks, and motors — from a low-voltage microcontroller like an Arduino, ESP32, or Raspberry Pi. Each channel features an SPDT (Single Pole Double Throw) relay rated for up to \u003cstrong\u003e250V AC \/ 10A\u003c\/strong\u003e or \u003cstrong\u003e30V DC \/ 10A\u003c\/strong\u003e, with onboard optocouplers that electrically isolate the relay coil circuit from your microcontroller for added safety and noise protection.\u003c\/p\u003e\n\u003cp\u003eThis version features a \u003cstrong\u003e4-pin input header\u003c\/strong\u003e (GND, IN1, IN2, VCC) and a \u003cstrong\u003eJD-VCC jumper\u003c\/strong\u003e that lets you choose between shared power (simple wiring) or fully isolated operation (separate relay power supply). The relays are \u003cstrong\u003eactive-LOW\u003c\/strong\u003e — they turn ON when the input signal is pulled LOW. LED indicators show the activation state of each channel at a glance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⭐ Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 independent relay channels\u003c\/strong\u003e — each with its own optocoupler-isolated input and LED status indicator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSPDT relay contacts\u003c\/strong\u003e — COM, NO (Normally Open), and NC (Normally Closed) screw terminals per channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-power switching\u003c\/strong\u003e — rated for 250V AC \/ 10A or 30V DC \/ 10A per channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptocoupler isolation\u003c\/strong\u003e — electrically separates your microcontroller from the relay coil circuit, preventing ground loops and protecting sensitive electronics from voltage spikes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJD-VCC jumper\u003c\/strong\u003e — leave on for simple shared-power wiring, or remove for full electrical isolation with a separate 5V relay supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.3V and 5V logic compatible\u003c\/strong\u003e — works directly with 5V Arduino boards; supports 3.3V logic (ESP32, Raspberry Pi) when JD-VCC jumper is removed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive-LOW trigger\u003c\/strong\u003e — relay activates when input pin is pulled LOW (15–20 mA per channel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew terminals\u003c\/strong\u003e — secure, tool-tightened connections for high-voltage \/ high-current output wiring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 mounting holes\u003c\/strong\u003e — M3 holes for secure installation in enclosures or project frames\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📌 Pinout Reference\u003c\/h2\u003e\n\u003ch3\u003eInput Header (4-Pin, Low-Voltage Side)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGround\u003c\/td\u003e\n\u003ctd\u003eConnect to microcontroller GND\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIN1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRelay 1 Input\u003c\/td\u003e\n\u003ctd\u003eActive-LOW — pull LOW to activate Relay 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIN2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRelay 2 Input\u003c\/td\u003e\n\u003ctd\u003eActive-LOW — pull LOW to activate Relay 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVCC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLogic Power\u003c\/td\u003e\n\u003ctd\u003eConnect to 5V (or 3.3V if JD-VCC jumper is removed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eJD-VCC Jumper\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eJumper State\u003c\/th\u003e\n\u003cth\u003eBehavior\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eON (default)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVCC and JD-VCC are bridged — relay coils share power with logic input. Simple wiring, but no electrical isolation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOFF (removed)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVCC and JD-VCC are separated — supply 5V separately to JD-VCC for full isolation. Enables 3.3V logic compatibility.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eRelay Output Terminals (High-Voltage Side) — Per Channel\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTerminal\u003c\/th\u003e\n\u003cth\u003eName\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCOM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCommon\u003c\/td\u003e\n\u003ctd\u003eConnect your load's power line here\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNO\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormally Open\u003c\/td\u003e\n\u003ctd\u003eDisconnected from COM when relay is OFF; connected when relay is ON\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormally Closed\u003c\/td\u003e\n\u003ctd\u003eConnected to COM when relay is OFF; disconnected when relay is ON\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003e🔧 JD-VCC Jumper Explained\u003c\/h2\u003e\n\u003cp\u003eThe JD-VCC jumper is what makes this module more versatile than basic relay boards. It controls whether the relay coils share power with your microcontroller or run from a separate supply.\u003c\/p\u003e\n\u003ch3\u003eJumper ON — Simple Wiring (No Isolation)\u003c\/h3\u003e\n\u003cp\u003eWith the jumper in place, just connect VCC to your Arduino's 5V pin and GND to GND. The relay coils draw power from the same 5V rail as your microcontroller. This is the easiest setup but offers no electrical isolation.\u003c\/p\u003e\n\u003ch3\u003eJumper OFF — Full Isolation\u003c\/h3\u003e\n\u003cp\u003eRemove the jumper and connect a separate 5V power supply to JD-VCC and the relay-side GND. The VCC pin on the input header now only powers the optocoupler LEDs and can run at 3.3V — making this mode essential for ESP32, Raspberry Pi, and other 3.3V boards.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔌 Wiring — Arduino (Jumper ON)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eRelay Module Pin\u003c\/th\u003e\n\u003cth\u003eArduino Pin\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIN1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDigital Pin 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIN2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDigital Pin 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVCC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e🔌 Wiring — ESP32 \/ Raspberry Pi (Jumper OFF)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eRelay Module Pin\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eGND\u003c\/strong\u003e (input header)\u003c\/td\u003e\n\u003ctd\u003eMicrocontroller GND\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIN1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGPIO pin (e.g., GPIO 4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIN2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGPIO pin (e.g., GPIO 5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eVCC\u003c\/strong\u003e (input header)\u003c\/td\u003e\n\u003ctd\u003eMicrocontroller 3.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJD-VCC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal 5V supply (+)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eGND\u003c\/strong\u003e (relay side)\u003c\/td\u003e\n\u003ctd\u003eExternal 5V supply (−)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003e💻 Sample Arduino Code\u003c\/h2\u003e\n\u003cp\u003eThis sketch toggles each relay on and off. Remember: \u003cstrong\u003eLOW = relay ON\u003c\/strong\u003e, \u003cstrong\u003eHIGH = relay OFF\u003c\/strong\u003e (active-LOW logic).\u003c\/p\u003e\n\u003cpre style=\"background: #1e1e1e; color: #d4d4d4; padding: 16px; border-radius: 8px; overflow-x: auto; font-size: 14px; line-height: 1.5;\"\u003e\u003ccode\u003e\/\/ 2-Channel Relay Module — Basic Toggle Example\n\/\/ Active-LOW: LOW = ON, HIGH = OFF\n\nconst int relay1 = 4;\nconst int relay2 = 5;\n\nvoid setup() {\n  pinMode(relay1, OUTPUT);\n  pinMode(relay2, OUTPUT);\n  digitalWrite(relay1, HIGH);  \/\/ Start OFF\n  digitalWrite(relay2, HIGH);  \/\/ Start OFF\n  Serial.begin(9600);\n  Serial.println(\"2-Channel Relay Test\");\n}\n\nvoid loop() {\n  digitalWrite(relay1, LOW);   \/\/ Relay 1 ON\n  Serial.println(\"Relay 1: ON\");\n  delay(2000);\n\n  digitalWrite(relay1, HIGH);  \/\/ Relay 1 OFF\n  Serial.println(\"Relay 1: OFF\");\n  delay(1000);\n\n  digitalWrite(relay2, LOW);   \/\/ Relay 2 ON\n  Serial.println(\"Relay 2: ON\");\n  delay(2000);\n\n  digitalWrite(relay2, HIGH);  \/\/ Relay 2 OFF\n  Serial.println(\"Relay 2: OFF\");\n  delay(2000);\n}\u003c\/code\u003e\n\u003c\/pre\u003e\n\u003chr\u003e\n\u003ch2\u003e📊 Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSPDT (Single Pole Double Throw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Contact Rating (AC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250V AC \/ 10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Contact Rating (DC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30V DC \/ 10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoil Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoil Current (per relay)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 70 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTrigger Level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eActive-LOW (LOW = relay ON)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Drive Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15–20 mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIsolation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOptocoupler (optical isolation between input and relay coil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×4 pin header (2.54mm pitch): GND, IN1, IN2, VCC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Power Jumper\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJD-VCC (connects or disconnects VCC from relay coil power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Terminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew terminals — COM, NO, NC per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStatus Indicators\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 LED per channel (lights when relay is active)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLogic Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V direct; 3.3V with JD-VCC jumper removed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 51 × 38 × 18 mm (2.0 × 1.5 × 0.7 inches) L × W × H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Holes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 (M3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003e📦 What's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x 2-Channel 5V Relay Module with Optocoupler Isolation (JD-VCC jumper pre-installed)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e🔌 Compatible With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eArduino Uno, Mega, Nano, Leonardo, and other 5V Arduino boards\u003c\/li\u003e\n\u003cli\u003eESP32 and ESP8266 (3.3V — remove JD-VCC jumper, use separate 5V relay supply)\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi (3.3V GPIO — remove JD-VCC jumper, use separate 5V relay supply)\u003c\/li\u003e\n\u003cli\u003eSTM32, Teensy, and other 3.3V\/5V microcontrollers\u003c\/li\u003e\n\u003cli\u003ePLC and industrial control interfaces with 5V logic outputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e🎯 Typical Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome automation\u003c\/strong\u003e — control lights, fans, appliances, and door locks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIoT projects\u003c\/strong\u003e — remote switching via Wi-Fi (ESP32\/ESP8266) or Bluetooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D printers \u0026amp; CNC machines\u003c\/strong\u003e — control heated beds, spindles, or cooling fans\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobotics\u003c\/strong\u003e — switch motors, solenoids, and pneumatic valves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomotive\u003c\/strong\u003e — control 12V accessories like LED light bars or auxiliary equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAquarium \u0026amp; greenhouse automation\u003c\/strong\u003e — timed control of pumps, lights, heaters, and ventilation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e⚠️ Important Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMains voltage is dangerous.\u003c\/strong\u003e If switching AC mains (110V\/220V), ensure all high-voltage wiring is properly insulated and enclosed. Never touch exposed terminals when the circuit is energized. If you are not experienced with mains wiring, consult a qualified electrician.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not exceed the relay's rated current.\u003c\/strong\u003e For continuous loads, derate to 7–8A to extend relay life and reduce heat buildup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInductive loads\u003c\/strong\u003e (motors, solenoids, transformers) generate voltage spikes when switched. Add a flyback diode (DC loads) or snubber circuit (AC loads) across the load to protect the relay contacts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay activates on power-up?\u003c\/strong\u003e GPIO pins may float LOW during microcontroller boot. Add a 10 kΩ pull-up resistor from each input pin to VCC, and in your code, set the pin HIGH before configuring it as an output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis module is not UL\/CE certified\u003c\/strong\u003e for permanent mains installations. It is intended for prototyping, hobby, and educational use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e📄 Documentation \u0026amp; Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/envistiamall.com\/blogs\/learn\/2-channel-5v-spdt-relay-module-with-optocoupler-user-guide\" target=\"_blank\" title=\"2 Channel 5V 10A SPDT Power Relay Module with Optocoupler Isolation User Guide\" rel=\"noopener\"\u003e📘 2-Channel 5V Relay Module User Guide\u003c\/a\u003e\u003ca href=\"\/es\/blogs\/user-guides\/2-channel-5v-spdt-power-relay-module-with-optocoupler-isolation-user-guide\"\u003e\u003c\/a\u003e — complete setup guide with wiring diagrams, JD-VCC jumper explanation, sample code, and troubleshooting\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/envistiamall.com\/blogs\/learn\/tagged\/power-switching-components\" target=\"_blank\" title=\"All Power and Switching Component User Guides\" rel=\"noopener\"\u003e🔗 All Power \u0026amp; Switching Component User Guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Envistia","offers":[{"title":"Default Title","offer_id":47130247430393,"sku":"EM-ECOMP-0134","price":2.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1641\/0911\/files\/250v10a-2-channel-spdt-power-relay-module-5v-optocoupler-control-1892880.jpg?v=1766314808","url":"https:\/\/envistiamall.com\/es\/products\/2-channel-10a-optoisolated-power-relay-module-5v-control","provider":"Envistia Mall","version":"1.0","type":"link"}