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In order to come up with the Best Optocouplers (2021), our powerful platforms and gurus have taken many factors into account such as product fitness for use, user-friendly features and give buyer satisfaction, deficiency-free, standards conformance, value for money, reliability, robustness, quality conformance to needs and good practises, safety, actual user satisfaction and numerous others. It is of great importance to mention that each user has different requirements so please use the below shortlist as a guide and not as a gospel. In any case, in the below shortlist you can certainly find the overall best ones regardless of your needs.

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Best Optocouplers

Best Choice No. 1
Gikfun OPTOCOUPLER DIP-4 PC817C PC817 for Arduino DIY (Pack of 20pcs) AE1143
  • Gikfun Packing 20pcs OPTOCOUPLER DIP-4 PC817C PC817
  • Number of Pin: 4
  • Pin Pitch: 2.54mm
  • Optocoupler Output Type: optical transistor
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Best Choice No. 2
(Pack of 100 Pieces) MCIGICM pc817 optocoupler Optoisolator Transistor Output 5000Vrms 1 Channel 4-DIP
  • (Pack of 100 Pieces) pc817c Optoisolator Transistor Output 5000Vrms 1 Channel 4-DIP
Best Choice No. 3
NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module PLC Signal Converter Module PNP NPN to NPN (5V to 3.3V)
  • NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module with high quality optocoupler and LED patch indicator.
  • The power supply has anti-connection protection. The limit conversion frequency is 20Khz.
  • PCB size: 45x72mm. Module size: 48x86x40mm (LxWxH).
  • Widely used, it can be used for signal isolation, level conversion between signals such as single chip microcomputer and PLC. PNP,NPN signal to NPN signal, signal level conversion and other uses.
  • NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Module User Manual Schematic Wiring diagram Download Link: https://www.amazon.com/clouddrive/share/3AVzCKmGbXp4LuKMK0mtfz4mHKpK3NXVd7f3yMdpfLM
SaleBest Choice No. 4
DAOKI 5Pcs Expansion Board TLP281 4-Channel 4 CH Opto-Isolator IC Module for Arduino Expansion Board High and Low Level Optocoupler Isolation
  • 【Four LEDs】This IC has four LEDs and four photodiodes built-in.
  • 【Advantages】This allows the low-voltage side to control a high voltage side
  • 【Outlet】Outlet OUT1 / OUT2 / OUT3 / OUT4 output current is equal to the largest HVCC / 5.1K, Maximum absorption current 500mA
  • 【Input】Input: IN1 / IN2 / IN3 / IN4, SCM or for Arduino IO port, GND with single-chip microcomputer or for Arduino board GND connection.
  • 【PCB Size】25*24mm/0.98*0.94
Best Choice No. 5
ToToT 10pcs Transistor Output Optocoupler DIP-4 PC817C PC817 High Density Mounting Type Photoelectric Coupler
  • Forward current (ICEO): 50mA; Peak forward current (ICE Max): 1A; Reverse voltage: 6V Power dissipation: 70 mw; The maximum collector / emitter voltage: 35V; The maximum collector / emitter voltage: 6V
  • Isolation voltage: 5000V (RMS); Current transfer ratio: 50% (minimum); Collector current: 50mA
  • Collector power dissipation: 150mW; Total power dissipation: 200mW; Operating temperature: -30 ~ +100 Degrees Celsius
  • Collector emitter saturation voltage: 0.1V (typical value); Cut-off frequency: 80kHz; Number of Pin: 4
  • Package includes: 10pcs DIP-4 PC817C PC817 Optocoupler
Best Choice No. 6
Cylewet 30Pcs Optocoupler PC817C 2.54mm Pitch 4 Pins DIP-4 Mounting Photo Coupler for Arduino (Pack of 30) CYT1056
  • Number of Pin: 4
  • Pin Pitch: 2.54mm
  • Isolation Voltage: 5kV
  • Optocoupler Output Type: optical transistor
Best Choice No. 8
Mecion PC817 Optocouplers Sharp 2.54mm Pitch Dip 4 Optical Transistor 50Pcs
  • Product Name: Optocoupler Sharp;Model: PC817
  • Number of Pin: 4; Pin Pitch: 2.54mm
  • Size: 9 x 5 x 8mm/0.35″ x 0.2″ x 0.31″ (L*W*H)
  • Package Content: 30pcs Mounting Photo Coupler
  • Used widely in computer terminals, system appliances, measuring instruments, registers, copiers, automatic vending machines etc
Best Choice No. 10
Icstation 12V Optocoupler Isolation Board (5pcs), EL817 1 Channel Opto PNP NPN Signal Converter, Isolator High-Level Trigger 80KHz
  • Package: 5pcs 1CH photocoupler isolator. DC 12V 1mA
  • DC 12V high-level trigger with positive phase amplification. The output is equal to the input.
  • Can be used to input a signal to MCU in isolation or MCU control another device in isolation. They are also good as the level converter(NPN-PNP, PNP-NPN).
  • Optocoupler isolator can be used with other electronic devices to provide isolation between low and high voltage circuits.
  • You’ll typically find these devices being used for: Microprocessor input/output switching; DC and AC power control; Communications equipment protection; Power supply regulation.

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