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
$0.64
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
$0.601
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. 307-064
Mfr. Part No.ISQ74
BrandIsocom
$2.32
Each
units
Through Hole Transistor 1.3V - 16 DIP - 2.6µs 50 mA 5.3 kVrms Yes 50% 50 % -
RS Stock No. 173-2229
Mfr. Part No.K1010 B
BrandCosmo
$0.292
Each (On a Reel of 2000)
units
Through Hole Transistor 1.4V - 4 DIP - 5µs 50 mA 5 kVrms - 260% 60 % 4µs
RS Stock No. 395-6344
Mfr. Part No.K1010 B
BrandCosmo
$0.559
Each (In a Pack of 10)
units
Through Hole Transistor 1.4V - 4 DIP - 5µs 50 mA 5 kVrms - 260% 60 % 4µs
RS Stock No. 773-3690
Mfr. Part No.VO615A-4
BrandVishay
$0.448
Each (In a Bag of 5)
units
Through Hole Phototransistor 1.6V 1 4 DIP DC 3µs 60 mA 5000 Vrms - 320% - 4.7µs
RS Stock No. 145-1822
Mfr. Part No.VO615A-4
BrandVishay
$0.28
Each (In a Tube of 100)
units
Through Hole Phototransistor 1.6V 1 4 DIP DC 3µs 60 mA 5 kVrms - 320% - 4.7µs
RS Stock No. 625-7909
Mfr. Part No.6N137(F)
BrandToshiba
$2.32
Each
units
Through Hole Transistor 1.75V 1 8 DIP DC 30ns 20 mA 2.5 kVrms Yes 1000% 1000 % 30ns
RS Stock No. 708-5285
Mfr. Part No.4N33
BrandVishay
$0.713
Each (In a Pack of 10)
units
Through Hole Darlington 1.5V 1 6 PDIP DC - 60 mA 5300 V ac - - 500 % -
RS Stock No. 759-9355
Mfr. Part No.HCPL2601
$2.61
Each (In a Pack of 2)
units
Through Hole Logic Gate 1.8V 1 8 DIP DC 50ns 50 mA 2500 V ac Yes - - 12ns
RS Stock No. 919-0060
Mfr. Part No.4N33
BrandVishay
$0.498
Each (In a Tube of 50)
units
Through Hole Darlington 1.5V 1 6 PDIP DC - 60 mA 5300 V ac - - 500 % -
RS Stock No. 166-1702
Mfr. Part No.HCPL2601
$1.309
Each (In a Bag of 1000)
units
Through Hole Logic Gate 1.8V 1 8 DIP DC 50ns 50 mA 2.5 kVrms Yes - - 12ns
RS Stock No. 597-302
Mfr. Part No.4N35
BrandIsocom
$0.77
Each
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 40 % 2µs
RS Stock No. 108-476
Mfr. Part No.SFH 6286-2T
BrandVishay
$1.57
Each (In a Pack of 5)
units
Surface Mount Transistor 1.5V 1 4 SMD AC - 50 mA 5.3 kVrms - 200% 63 % -
RS Stock No. 919-4362
Mfr. Part No.SFH 6286-2T
BrandVishay
$0.738
Each (On a Reel of 1000)
units
Surface Mount Transistor 1.5V 1 4 SMD AC - 50 mA 5300 V ac - 200% 63 % -
RS Stock No. 453-1643
Mfr. Part No.4N25X
BrandIsocom
$0.518
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. 768-9350
Mfr. Part No.CNY64A
BrandVishay
$3.955
Each (In a Bag of 2)
units
Through Hole Phototransistor 1.6V 2 4 DIP DC 2.4µs 75 mA 8200 Vrms - 125% - 2.7µs
RS Stock No. 453-0965
Mfr. Part No.H11AA1X
BrandIsocom
$0.957
Each (In a Pack of 10)
units
Through Hole Transistor 1.5V 1 6 PDIP AC - 100 mA 5.3 kVrms - - 20 % -
RS Stock No. 145-1640
Mfr. Part No.CNY64A
BrandVishay
$1.779
Each (In a Tube of 40)
units
Through Hole Phototransistor 1.6V 2 4 DIP DC 2.4µs 75 mA 8.2 kVrms - 125% - 2.7µs
RS Stock No. 691-2202
Mfr. Part No.LTV-826
BrandLite-On
$0.642
Each (In a Pack of 5)
units
Through Hole Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
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