Optocoupler ICs

An optocoupler, also known as an opto-isolator or photocoupler, is a semiconductor device which is used to couple isolated circuits. Within an optocoupler you will find a light emitter and a light sensor. Optocouplers usually come in a semiconductor package, such as SOIC or PDIP.

How does an optocoupler work?
Optocouplers work by transferring energy from one circuit to another circuit via an optical transmission path, while providing electrical isolation
The light emitter device can come in the form of an LED (light emitting diode) that produces IR or visible light, or a laser diode. The light emitter receives the input and converts it into a light signal. The light detector senses the light emitter and converts it back into an electrical signal.

Optocouplers are often used in high-voltage applications to block the high voltages and variations in voltage. This ensures that, if there is a spike in one part of a circuit, it will not affect other parts. Therefore they are ideal for applications which may experience variations in voltage.

Types of Optocoupler:
• Resistive
• Photodiode
• Phototransistor
• Bidirectional

Output Types
• CMOS
• Darlington
• IGBT Gate Drive
• Logic Gate
• MOSFET
• Photodarlington
• Phototransistor
• Single Transistor
• TRIAC

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Description Price Mounting Type Output Device Maximum Forward Voltage Number of Channels Number of Pins Package Type Input Current Type Typical Rise Time Maximum Input Current Isolation Voltage Logic Output Maximum Current Transfer Ratio Minimum Current Transfer Ratio Typical Fall Time
RS Stock No. 597-289
Mfr. Part No.4N25
BrandIsocom
MYR2.21
Each
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 20 % 2µs
RS Stock No. 168-8528
Mfr. Part No.4N25
BrandIsocom
MYR1.58
Each (In a Tube of 65)
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 20 % 2µs
RS Stock No. 168-8557
Mfr. Part No.CNY17-3X
BrandIsocom
MYR1.813
Each (In a Tube of 65)
units
Through Hole Transistor 1.65V - 6 DIP - 2µs 60 mA 5.3 kVrms - 200% 200 % 2µs
RS Stock No. 453-1687
Mfr. Part No.CNY17-3X
BrandIsocom
MYR1.813
Each (In a Pack of 10)
units
Through Hole Transistor 1.65V - 6 DIP - 2µs 60 mA 5.3 kVrms - 200% 200 % 2µs
RS Stock No. 171-2964
Mfr. Part No.H11L1 V2
BrandIsocom
MYR2.191
Each (In a Tube of 65)
units
Through Hole Schmitt Trigger 1.5V 1 6 - DC 0.1µs 60 (Forward) mA 5 kVrms - - - 0.1µs
RS Stock No. 453-1722
Mfr. Part No.H11L1
BrandIsocom
MYR3.708
Each (In a Pack of 10)
units
Through Hole Transistor 1.5V - 6 DIP - 0.5µs 50 mA 5 kVrms - - - 0.5µs
RS Stock No. 597-302
Mfr. Part No.4N35
BrandIsocom
MYR3.38
Each
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 40 % 2µs
RS Stock No. 453-1643
Mfr. Part No.4N25X
BrandIsocom
MYR1.813
Each (In a Pack of 10)
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 20 % 2µs
RS Stock No. 453-1132
Mfr. Part No.MOC3062X
BrandIsocom
MYR3.104
Each (In a Pack of 10)
units
Through Hole Phototriac - 1 6 PDIP - - 50 mA 5.3 kVrms - - - -
RS Stock No. 168-8549
Mfr. Part No.IS355
BrandIsocom
MYR1.05
Each (On a Reel of 3000)
units
Surface Mount Darlington 1.4V 1 4 PDIP DC 4µs 50 mA 3.75 kVrms - 7500% 600 % 3µs
RS Stock No. 453-0915
Mfr. Part No.IS355
BrandIsocom
MYR2.651
Each (In a Pack of 10)
units
Surface Mount Darlington 1.4V 1 4 PDIP DC 4µs 50 mA 3.75 kVrms - 7500% 600 % 3µs
RS Stock No. 453-0757
Mfr. Part No.ISP847XC
BrandIsocom
MYR7.724
Each (In a Pack of 5)
units
Through Hole Transistor 1.4V 4 16 PDIP DC 4µs 50 mA 5.3 kVrms - 400% 200 % 3µs
RS Stock No. 171-2980
Mfr. Part No.MOC3042X V2
BrandIsocom
MYR2.191
Each (In a Tube of 65)
units
Through Hole Phototriac 1.4V 1 6 DIP AC - 50 mA 5.3 kVrms, 7500 V Pk - - - -
RS Stock No. 171-2971
Mfr. Part No.MCT2201X V2
BrandIsocom
MYR1.096
Each (In a Tube of 65)
units
Through Hole Phototransistor 1.5V 1 6 DIP DC - 60 (Forward) mA 5.3 kVrms, 7500 V Pk - - 100% -
RS Stock No. 453-0909
Mfr. Part No.ISP845X
BrandIsocom
MYR8.406
Each (In a Pack of 5)
units
Through Hole Darlington 1.4V 4 16 PDIP DC 60µs 50 mA 5.3 kVrms - 7500% 600 % 53µs
RS Stock No. 171-2951
Mfr. Part No.IS357C V2
BrandIsocom
MYR1.245
Each (On a Reel of 3000)
units
Through Hole Phototransistor 1.4V 1 4 - - 4µs 50 (Forward) mA 3.75 kVrms, 5300 V Pk - 600% 50% 3µs
RS Stock No. 171-2994
Mfr. Part No.IS357C V2
BrandIsocom
MYR1.582
Each (In a Pack of 25)
units
Through Hole Phototransistor 1.4V 1 4 - - 4µs 50 (Forward) mA 3.75 kVrms, 5300 V Pk - 600% 50% 3µs
RS Stock No. 161-1148
Mfr. Part No.MOC3041
BrandIsocom
MYR3.285
Each (In a Pack of 10)
units
Through Hole Triac 1.4V 1 6 DIP AC - 50 mA 5300 (Minimum) Vrms - - - -
RS Stock No. 168-8533
Mfr. Part No.ISD203
BrandIsocom
MYR3.424
Each (In a Tube of 50)
units
Through Hole Transistor 1.65V 2 8 PDIP DC - 50 mA 5.3 kVrms - 450% 225 % -
RS Stock No. 171-2970
Mfr. Part No.ISP845X V2
BrandIsocom
MYR4.601
Each (In a Tube of 50)
units
Through Hole Photodarlington 1.4V 1 4 DIP - 60µs 50 (Forward) mA 3.75 kVrms, 5300 V Pk - 7500% 600% 53µs