Best Optocouplers of 2026

The Chanzon PC817 Optocoupler is a set of 50 reliable optocouplers designed for easy installation with a 4-pin DIP package. It offers a wide transfer ratio range from 50% to 600%, which means you can expect flexible and efficient signal transfer for various electronic projects. With a strong isolation voltage of 5000Vrms, it ensures your circuits remain protected from high voltage spikes, keeping your components safe. The 4-pin through-hole design makes it simple to mount on breadboards or circuit boards, perfect for DIY electronics or Arduino projects. This pack is compatible with other popular models like EL817C, making it a versatile choice for replacements or new builds.

The ALLECIN PC817 Optocoupler is a versatile component ideal for various electronic projects. With its four pins and a 2.54mm pitch, it makes connections straightforward, allowing you to focus on your experiments. The high isolation voltage between the input and output ensures safety and reliability, which is crucial when working with sensitive electronics. Its double transfer mold packaging provides durability, protecting the internal components during use. This optocoupler is perfect for applications like computer terminals, measuring instruments, and household appliances, making it a valuable addition to your toolkit.

The AOICRIE PC817 Optocoupler is a handy isolation module designed with a single channel and easy-to-use screw terminals, making wiring quick and simple for you. It supports a range of input voltages from 3V up to 24V, giving you flexibility depending on your project needs. This module helps protect your microcontroller when driving motors or other inductive devices by isolating signals and reducing interference. Additionally, it can act as a level converter, allowing you to safely connect devices with different voltage levels, which is perfect if you want to control or receive signals from other equipment without risk.

The DONGKER Optocoupler Board is a versatile voltage converter adapter module that offers optocoupler isolation control and 8-channel input and output. With NPN / PNP signal output capability, this module supports DC 3.3V5V input and can handle a load voltage range of DC 1.8V-24V. The optocoupler isolation control ensures electrical isolation between the input and output, providing added protection to your circuit. The 8-channel input and output allow for easy integration with multiple devices, making it suitable for various applications. The NPN / PNP signal output offers flexibility in signal compatibility, allowing you to connect to different types of devices. With support for DC 3.3V5V input, this module is compatible with a wide range of power sources. The DC 1.8V-24V load voltage capability makes it suitable for different load requirements. The DONGKER Optocoupler Board is a reliable and convenient solution for voltage conversion and signal control in your projects.

The NOYITO Optocoupler Module offers an easy way to protect your microcontroller circuits from electrical interference by using 5.0 pitch screw terminals for straightforward wiring. If you need to detect high voltages, such as a 12V sensor output while working with a 5V microcontroller, this module safely isolates the signals to prevent damage. It also helps amplify current when your microcontroller's output is too weak to drive certain devices like motors. With flexible input voltage options (3-5V, 12V, or 24V), it adapts to different setups, making your electronics projects more reliable and versatile.

The AOICRIE PC817 Optocoupler lets you control multiple voltages independently, making it easy to manage different circuits at once. With four channels, you can handle signal voltages from 3.6 to 24V and outputs up to 30V, giving you flexibility for various projects. This module isolates your control signals, so you can safely connect microcontrollers or other devices without worrying about voltage interference. Plus, it includes jumper caps that let you choose between high or low output, offering you simple customization to fit your specific needs.

The NOYITO Optocoupler Module is designed to provide reliable signal isolation, making it an essential tool for your electronic projects. With 5.0 pitch screw terminals, you can easily connect your devices without hassle. This module helps protect your microcontroller by isolating it from high-voltage signals, ensuring safe operation. Additionally, it amplifies weak output currents, allowing you to drive more demanding circuits effortlessly. Whether you're working with 3-5V, 12V, or 24V signals, this module offers versatile voltage handling to meet your needs.

The Diitao 2-Channel Optocoupler is designed to handle signal voltages from 3.3 to 24 volts and output voltages between 3.6 and 30 volts, making it versatile for various electronic projects. You can easily switch between high and low potential outputs using the included jumper cap, allowing for flexible control options. With two independent channels on board, you can control different voltages simultaneously, which is great for managing multiple circuits at once. Keep in mind, though, it works best with signals below 3 kHz, so it’s ideal for low-frequency applications. This makes it a useful and adaptable module for your isolation and driving needs.

The TAODAN PC817 Optocoupler comes in a set of 50 pieces, making it a great choice if you need multiple units for your projects or repairs. Each chip has four pins, which allows for easy integration into your circuits. The pins are spaced 2.54mm apart, a common size that fits well with standard breadboards and PCBs, making installation straightforward. This optocoupler uses a phototransistor output, providing reliable signal transfer while keeping your devices electrically isolated. With the TAODAN PC817 Optocoupler, you get a convenient and efficient component for various electronic applications.