Optocouplers are essential components for isolating electrical signals between two circuits, preventing damage from voltage spikes and noise. Selecting the appropriate optocoupler is crucial for ensuring the safety, reliability, and performance of your electronic systems, especially in demanding industrial environments.
Looking for the best Optocouplers?
Discover now our comparison of the best Optocouplers. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Optocouplers are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Optocouplers in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.
No. 1
BOJACK PC817 OPTOCOUPLER DIP Installation PC817C 2.54 mm Pitch 4-pin DIP-4 (Pack of 50 pcs)
- Photocoupler output type: phototransistor
- Number of pins: 4
- Needle distance: 2.54mm
- Package quantity: 50 pieces, packed in a durable and resealable plastic storage box.
- Application: PC817 photocoupler is widely used in computer terminals, SCR system equipment, measuring instruments, photocopiers, automatic ticketing, household appliances
No. 2
AOICRIE 4pcs PC817 4 Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver...
- PC817 4 channel optocoupler isolation board is independent, can control different voltage at then same time.
- 4-way 817 optocoupler driving port signal voltage:3.6-24V; Output voltage range: 3.6-30V(The output current depends on the specific situation but not over 10MA. When the total power is fixed, the voltage and current are inversely proportional).
- 4 way 817 optocoupler to achieve the control signal and the control signal isolation, you can directly use the microcontroller or other devices IO port to achieve voltage isolation control, you can achieve a small voltage control, the control side can be...
- PC817 module jumper cap can be used to determine whether the output terminal is high potential output or low output.
- If it is a pulse signal, please note that the limit of 817 is below 3KHZ. If the control signal is greater than 3KHZ, please do not use this module, it will not work properly.
No. 3
NOYITO 1-Channel PC817 Optocoupler Isolation Module Optoelectronic Isolator Signal Isolation and...
- NOYITO 1-Channel PC817 Optocoupler Isolation module adopts 5.0 pitch screw terminals for easy wiring . The module can play the role of isolation when the output level of the single-chip microcomputer drives the inductive devices such as motors and motors...
- The module can be used for high-voltage detection. For example, if the output signal level of a sensor is 12V, and the voltage of the microcontroller is 5V, this module can be used for isolation detection.
- The module can also be used for current amplification. For example, when the output current of the microcontroller is too small to drive certain circuits, this module can be used for amplification.
- Input signal voltage: 3-5V / 12V / 24V (optional).
- Output signal voltage: wide voltage, suitable for DC1.8 - 24V.
No. 4
GuuYebe 50 Pcs PC817 Optocoupler PC817C Optocouplers of Optoelectronic Products
- GuuYebe PC817 Optocoupler kit : PC817C PC817 Optocoupler, Optocouplers of Optoelectronic Products
- Model No: PC817 Optocoupler PC817C
- GuuYebe PC817 Optocoupler / PC817C Spec: Photocoupler output type is phototransistor , Number of pins is 4, Needle distance is 2.54mm , Package quantity is 50 pieces.
- GuuYebe PC817 Optocoupler has been widely applied: Replace equipment parts,include as SCR system equipmen etc ...
- 24 X 7 After-Sales Service: Our team Provides 7 X 24 Online Service for our Customers, If you have any issues, we will provide related services for you privately, Meanwhile GuuYebe Provides a warranty for 1 Year more. if you get any issues with Kit, we...
No. 5
5 PCS Optocoupler Isolation Board, Icstation DC 12V Optocoupler Isolation Module EL817 1 Channel Opto PNP NPN...
- 【Relay Switch Module】5pcs 1-channel photocoupler isolator with stable performance, triggered by DC 12V and 1mA current.
- 【Signal Voltage】Positive phase amplification with high-level trigger. Output equals input.
- 【Level Converter】Opto-isolators can be used as level converters (NPN-PNP, PNP-NPN), signal input to MCU in isolation, or MCU-controlled device output in isolation.
- 【Control Transformer】Optocoupler isolation board provide isolation between low and high-voltage circuits when used with other electronic devices.
- 【Functional Application】Devices for microprocessor Input/Output switching, DC/AC power control, communications equipment protection, and power supply regulation.
No. 6
VIBICCK 60pcs optocouplers PC817C Installed with DIP-4 50% -600% Transmission Ratio 4-pin optocoupler...
- Spec: 1-channel type, Transfer Ratio CTR Min.CTR 50% Max 600% (IF = 5mA, V = 5V),Isoration Voltage: 5000Vrms,
- Number of Pins: 4 pin(dip-4), Through Hole
- Package quantity:60 pieces, packed in a durable and resealable plastic bag.
- Compatible with: EL817C/LTV817C/FL817C Optocouplers
- Used for: Optical Isolator Tap Circuit Board, Bread Board arduino DIY、 Replace the coupler.
No. 7
Chanzon 50pcs PC817 Optocoupler PC817C DIP Installation DIP-4 50%-600% Transfer Ratio 4pin Optocouple...
- Spec: 1-channel type, Transfer Ratio CTR Min.CTR 50% Max 600% (IF = 5mA, V = 5V),Isoration Voltage: 5000Vrms, Please see pic3-pic5 for detail parameters.
- Number of Pins: 4 pin(dip-4), Through Hole
- Package quantity: 50 pieces, packed in a durable and resealable plastic bag.
- Compatible with: EL817C/LTV817C/FL817C Optocouplers
- Used for: Opto isolator breakout circuit board, breadboard,arduino DIY, coupler replacement.
No. 8
AOICRIE 6pcs PC817 1 Channel Optocoupler Isolation Module 1CH Optocoupler PC817 3-5V 12V 24V Photoelectric...
- 1-Channel PC817 optocoupler isolation module adopts 5.0 pitch screw terminals for convenient wiring.
- 1-way 817 optocoupler drive terminal input signal voltage: DC 3V-5V/12V/24V (optional); Output signal voltage: wide voltage suitable for DC1.8V-24V.
- The 1-way optocoupler isolation module is suitable for isolation when the output level of the single-chip microcomputer is used to drive inductive components such as motors, and anti-interference protects some circuits of the single-chip microcomputer.
- PC817 1 channel way optocoupler isolation board are good as the level converter(NPN-PNP, PNP-NPN), and can also be used to input a signal to MCU in isolation or MCU control another device in isolation.
- Photoelectric isolator rail holder PLC drive motor board output level of the single-chip microcomputer is low, and the driving voltage of the driven module is high for level matching.
No. 9
Bridgold 50pcs PC817c PC817 for Arduino DIY Through Hole transistor output optocoupler,4-Pin
- Supply Voltage:international standard
- Type:Integrated Circuits
- 4 pins, dual row, 2.54mm pitch.Used widely in computer terminals
- Size : 8 x 4 x 7mm/0.3" x 0.2" x 0.3" (L*W*H)
- Material : Plastic, Metal
No. 10
NOYITO 1-Channel PC817 Optocoupler Isolation Module Optoelectronic Isolator Signal Isolation and...
- NOYITO 1-Channel PC817 Optocoupler Isolation module adopts 5.0 pitch screw terminals for easy wiring . The module can play the role of isolation when the output level of the single-chip microcomputer drives the inductive devices such as motors and motors...
- The module can be used for high-voltage detection. For example, if the output signal level of a sensor is 12V, and the voltage of the microcontroller is 5V, this module can be used for isolation detection.
- The module can also be used for current amplification. For example, when the output current of the microcontroller is too small to drive certain circuits, this module can be used for amplification.
- Input signal voltage: 3-5V / 12V / 24V (optional).
- Output signal voltage: wide voltage, suitable for DC1.8 - 24V.
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Last update on 2026-04-10 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Optocouplers
Package Types and Mounting
Optocouplers come in various package types, including through-hole (DIP) and surface-mount (SMD) options. Through-hole components are easier to prototype with and can be more robust in certain applications. Surface-mount devices are ideal for compact designs and automated assembly processes. Ensure the chosen package type is compatible with your PCB design and manufacturing capabilities.Frequently Asked Questions
What is the primary function of an optocoupler?
The primary function of an optocoupler is to provide electrical isolation between two circuits using light. This prevents high voltages or electrical noise from damaging sensitive components on one side of the circuit.
What does Current Transfer Ratio (CTR) mean?
Current Transfer Ratio (CTR) is a key specification indicating the efficiency of an optocoupler. It's the ratio of output current to input current, with higher CTR values meaning more output current is generated for a given input current.
How do I choose the correct isolation voltage?
The isolation voltage rating should be significantly higher than the maximum voltage difference expected between the input and output circuits. Consider safety margins and potential voltage transients in your application.
Are optocouplers suitable for high-speed applications?
Some optocouplers are designed for high-speed applications. Look for devices with fast response times and specific designations like high-speed optocouplers or those with logic gate outputs.
What is the difference between a phototransistor and a photodarlington optocoupler?
Photodarlington optocouplers offer a higher current gain and thus a higher CTR than standard phototransistor optocouplers. However, they generally have slower switching speeds.
