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. 796-5298
Mfr. Part No.TLP293(BL
BrandToshiba
HK$2.54
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. 169-8557
Mfr. Part No.FOD817A300
HK$1.019
Each (In a Bag of 2000)
units
Through Hole Transistor 70V 1 4 DIP-B DC 18µs 50 mA 5 kVrms - 160% - 18µs
RS Stock No. 352-5495
Mfr. Part No.AQY414EH
BrandPanasonic
HK$37.62
Each
units
Through Hole MOSFET - - 4 DIP DC - 50 mA 5 kVrms - - - -
RS Stock No. 691-2209
Mfr. Part No.LTV-827S-TA1
BrandLite-On
HK$2.99
Each (In a Pack of 5)
units
Surface Mount Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 739-0265
Mfr. Part No.FOD817A300
HK$3.122
Each (In a Pack of 5)
units
Through Hole Transistor 70V 1 4 DIP-B DC 18µs 50 mA 5000 Vrms - 160% - 18µs
RS Stock No. 165-2318
Mfr. Part No.TCLT1000
BrandVishay
HK$1.82
Each (On a Reel of 3000)
units
Surface Mount Phototransistor 1.6V 1 4 SOP DC 3µs 60 mA 5 kVrms - 600% 50 % 4.7µs
RS Stock No. 173-2229
Mfr. Part No.K1010 B
BrandCosmo
HK$1.404
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. 597-302
Mfr. Part No.4N35
BrandIsocom
HK$10.60
Each
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 40 % 2µs
RS Stock No. 699-8284
Mfr. Part No.TCLT1000
BrandVishay
HK$2.459
Each (In a Pack of 10)
units
Surface Mount Phototransistor 1.6V 1 4 SOP DC 3µs 60 mA 5000 V ac - 600% 50 % 4.7µs
RS Stock No. 395-6344
Mfr. Part No.K1010 B
BrandCosmo
HK$2.835
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. 169-8133
Mfr. Part No.KPC357NT0B
BrandCosmo
HK$2.00
Each (On a Reel of 3000)
units
Surface Mount Transistor 1.4V - 4 DIP - 5µs 50 mA 3.75 kVrms - 260% 130 % 4µs
RS Stock No. 395-6293
Mfr. Part No.KPC357NT0B
BrandCosmo
HK$3.438
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. 125-7579
Mfr. Part No.LTV-827S
BrandLite-On
HK$2.333
Each (In a Tube of 50)
units
Surface Mount - 1.4V 2 8 PDIP DC - 50 mA 5000 Vrms - - - -
RS Stock No. 168-9674
Mfr. Part No.LTV-827S-TA1
BrandLite-On
HK$1.542
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. 166-2381
Mfr. Part No.HCPL2531SD
HK$7.325
Each (On a Reel of 1000)
units
Surface Mount Phototransistor 1.8V 2 8 MDIP DC 1.5µs 25 mA 2.5 kVrms Yes 50% - 1.5µs
RS Stock No. 885-1225
Mfr. Part No.TLP2168(F)
BrandToshiba
HK$20.58
Each (In a Pack of 5)
units
Surface Mount Photo IC 1.8V 1 8 SOIC - 30ns 8 mA 2500 Vrms Yes - - 30ns
RS Stock No. 166-2444
Mfr. Part No.MOC3083M
HK$2.78
Each (In a Bag of 1000)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7.5 kVrms - - - -
RS Stock No. 708-5471
Mfr. Part No.SFH615A-3
BrandVishay
HK$2.691
Each (In a Pack of 10)
units
Through Hole Phototransistor 1.65V 1 4 PDIP DC 3µs 60 mA 5300 V ac - 200% 100 % 14µs
RS Stock No. 165-5791
Mfr. Part No.PVI5050NSPBF
BrandInfineon
HK$26.66
Each (In a Tube of 50)
units
Surface Mount MOSFET 8V 1 4 DIP DC 300µs 50 mA dc 4 kVrms - - - 220µs
RS Stock No. 739-0256
Mfr. Part No.MOC3083M
HK$6.50
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7500 V ac - - - -
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