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$2.122
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$1.416
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$5.127
Each (In a Pack of 10)
units
Through Hole Darlington 1.3V 1 4 DIP DC - - 2500 Vrms - 2000% - -
RS Stock No. 100-0151
Mfr. Part No.TLP250(F)
BrandToshiba
HK$16.212
Each (In a Pack of 5)
units
Through Hole Transistor 1.3V 1 8 PDIP DC 2µs 300 mA 2500 V ac Yes - - -
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$7.93
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. 159-6466
Mfr. Part No.ILD206T
BrandVishay
HK$3.955
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. 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. 165-4915
Mfr. Part No.SFH6186-3T
BrandVishay
HK$4.759
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. 815-1030
Mfr. Part No.6N136
BrandVishay
HK$8.132
Each (In a Pack of 10)
units
Through Hole Transistor 1.9V 1 8 DIP DC - 25 mA 5300 Vrms - 35% - -
RS Stock No. 168-7824
Mfr. Part No.TLP292(BL
BrandToshiba
HK$1.495
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. 919-4312
Mfr. Part No.6N136
BrandVishay
HK$10.846
Each (In a Tube of 50)
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$2.708
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. 168-7827
Mfr. Part No.TLP293(BL
BrandToshiba
HK$1.289
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. 885-1023
Mfr. Part No.TLP293(BL,E(T
BrandToshiba
HK$2.993
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. 671-1352
Mfr. Part No.4N35M
HK$4.852
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. 145-5525
Mfr. Part No.4N35M
HK$1.473
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. 169-8133
Mfr. Part No.KPC357NT0B
BrandCosmo
HK$1.628
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. 168-9674
Mfr. Part No.LTV-827S-TA1
BrandLite-On
HK$1.473
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. 169-8557
Mfr. Part No.FOD817A300
HK$0.837
Each (In a Bag of 2000)
units
Through Hole Transistor 70V 1 4 DIP-B DC 18µs 50 mA 5 kVrms - 160% - 18µs
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