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. 691-2120
Mfr. Part No.LTV-817A
BrandLite-On
HK$2.318
Each (In a Pack of 10)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 160% 80 % 3µs
RS Stock No. 168-9662
Mfr. Part No.LTV-817A
BrandLite-On
HK$1.565
Each (In a Tube of 100)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 160% 80 % 3µs
RS Stock No. 896-2565
Mfr. Part No.TLP523(F)
BrandToshiba
HK$5.273
Each (In a Pack of 10)
units
Through Hole Darlington 1.3V 1 4 DIP DC - - 2500 Vrms - 2000% - -
RS Stock No. 159-6466
Mfr. Part No.ILD206T
BrandVishay
HK$3.938
Each (On a Reel of 2000)
units
Surface Mount Transistor 1.55V 2 8 SOIC DC - 30 mA 4 kVrms - 125% 63 % -
RS Stock No. 547-4125
Mfr. Part No.HCPL-0710-000E
BrandBroadcom
HK$42.30
Each
units
Surface Mount Transistor 6.5V - 8 SO DC 9ns 10 μA 3.75 kVrms Yes - - 8ns
RS Stock No. 631-1182
Mfr. Part No.ILD206T
BrandVishay
HK$9.881
Each (In a Pack of 10)
units
Surface Mount Transistor 1.55V 2 8 SOIC DC - 30 mA 4 kVrms - 125% 63 % -
RS Stock No. 919-4312
Mfr. Part No.6N136
BrandVishay
HK$11.063
Each (In a Tube of 50)
units
Through Hole Transistor 1.9V 1 8 DIP DC - 25 mA 5300 Vrms - 35% - -
RS Stock No. 165-4915
Mfr. Part No.SFH6186-3T
BrandVishay
HK$4.419
Each (On a Reel of 1000)
units
Surface Mount Transistor 1.5V 1 4 SMD DC 3.5µs 60 mA 5.3 kVrms - 200% 100 % 5µs
RS Stock No. 796-5282
Mfr. Part No.TLP292(BL
BrandToshiba
HK$2.993
Each (In a Pack of 25)
units
Surface Mount Infrared LED 1.4V 1 4 SOIC AC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 168-7824
Mfr. Part No.TLP292(BL
BrandToshiba
HK$1.512
Each (On a Tape of 175)
units
Surface Mount Infrared LED 1.4V 1 4 SOIC AC 2µs 50 mA 3.75 kVrms - 600% - 3µs
RS Stock No. 815-1030
Mfr. Part No.6N136
BrandVishay
HK$10.868
Each (In a Pack of 10)
units
Through Hole Transistor 1.9V 1 8 DIP DC - 25 mA 5300 Vrms - 35% - -
RS Stock No. 796-5298
Mfr. Part No.TLP293(BL
BrandToshiba
HK$2.762
Each (In a Pack of 25)
units
Surface Mount Transistor 1.4V 1 4 SOIC DC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 145-5525
Mfr. Part No.4N35M
HK$1.597
Each (In a Bag of 1000)
units
Through Hole Transistor 1.5V 1 6 PDIP DC - 60 mA 7.5 kVrms - - 100 % -
RS Stock No. 885-1023
Mfr. Part No.TLP293(BL,E(T
BrandToshiba
HK$3.093
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO4 DC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 168-7827
Mfr. Part No.TLP293(BL
BrandToshiba
HK$1.325
Each (On a Tape of 175)
units
Surface Mount Transistor 1.4V 1 4 SOIC DC 2µs 50 mA 3.75 kVrms - 600% - 3µs
RS Stock No. 671-1352
Mfr. Part No.4N35M
HK$5.482
Each (In a Pack of 5)
units
Through Hole Transistor 1.5V 1 6 PDIP DC - 60 mA 7.5 kVrms - - 100 % -
RS Stock No. 168-9674
Mfr. Part No.LTV-827S-TA1
BrandLite-On
HK$1.628
Each (On a Reel of 1000)
units
Surface Mount Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 395-6293
Mfr. Part No.KPC357NT0B
BrandCosmo
HK$3.121
Each (In a Pack of 10)
units
Surface Mount Transistor 1.4V - 4 DIP - 5µs 50 mA 3.75 kVrms - 260% 130 % 4µs
RS Stock No. 352-5495
Mfr. Part No.AQY414EH
BrandPanasonic
HK$43.22
Each
units
Through Hole MOSFET - - 4 DIP DC - 50 mA 5 kVrms - - - -
RS Stock No. 125-7579
Mfr. Part No.LTV-827S
BrandLite-On
HK$2.688
Each (In a Tube of 50)
units
Surface Mount - 1.4V 2 8 PDIP DC - 50 mA 5000 Vrms - - - -