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. 171-8060
Mfr. Part No.TLP620-2SM
BrandIsocom
$0.96
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
New
RS Stock No. 186-4382
Mfr. Part No.PS9821-2-AX
$5.855
Each (In a Pack of 2)
units
Surface Mount Photodetector 1.8V 2 8 SSOP - 20ns 10 mA 2.5 kVrms - - - 5ns
RS Stock No. 756-3448
Mfr. Part No.TLP351(D4,F)
BrandToshiba
$2.666
Each (In a Pack of 5)
units
Through Hole IGBT Gate Drive, MOSFET 1.7V 1 8 DIP DC 50ns 20 mA 3750 V ac Yes - - 50ns
RS Stock No. 796-5171
Mfr. Part No.TLP2766
BrandToshiba
$1.974
Each (In a Pack of 5)
units
Surface Mount Infrared LED 1.7V 1 6 SDIP AC 15ns 15 mA 5000 Vrms Yes - - 15ns
RS Stock No. 880-1968
Mfr. Part No.OPI1264A
BrandOptek
$4.105
Each (In a Pack of 2)
units
Through Hole NPN Phototransistor, Photosensor 1.6V - 4 - DC - 40 mA 10 Vrms - Minimum of 25% - -
RS Stock No. 171-7992
Mfr. Part No.TLP321GBSMT&R
BrandIsocom
$0.46
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
New
RS Stock No. 186-7269
Mfr. Part No.HCPL2530
$2.244
Each (In a Tube of 50)
units
Through Hole Transistor 1.8V 2 8 PDIP DC - 16 mA 2.5 kVrms Yes 50% 7% -
RS Stock No. 799-5283
Mfr. Part No.TLP2368(E(O
BrandToshiba
$2.308
Each (In a Pack of 5)
units
Surface Mount Transistor 1.7V 1 5 SO DC 30ns 25 mA 3750 Vrms - - - 30ns
RS Stock No. 864-9240
Mfr. Part No.FODM3083
$2.244
Each (In a Pack of 5)
units
Surface Mount Triac Driver 1.5V 1 4 Mini-Flat - - 60 mA 3750 Vrms - - - -
RS Stock No. 178-3170
Mfr. Part No.ACPL-312U-000E
BrandBroadcom
$5.192
Each (In a Tube of 50)
units
Surface Mount Phototransistor 1.95V 1 8 DIP DC 0.1µs 16 mA 3.75 kVrms Yes - - 0.1µs
RS Stock No. 168-7812
Mfr. Part No.TLP2301
BrandToshiba
$0.553
Each (In a Tube of 125)
units
Surface Mount Transistor 1.4V 1 4 SOIC DC - 50 mA 3.75 kVrms - 600% - -
RS Stock No. 166-3307
Mfr. Part No.FOD817C3SD
$0.234
Each (On a Reel of 1000)
units
Surface Mount Phototransistor 1.4V 1 4 MDIP DC 18µs 50 mA 5 kVrms - 400% - 18µs
RS Stock No. 818-8259
Mfr. Part No.ACPL-227-50BE
BrandBroadcom
$1.048
Each (In a Pack of 10)
units
Surface Mount Phototransistor 1.4V 1 8 SOIC DC 2µs 5 mA 3000 Vrms - 260% - 3µs
RS Stock No. 171-8087
Mfr. Part No.TLP621-2GRSM
BrandIsocom
$0.76
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 207-608
Mfr. Part No.TLP225A(F)
BrandToshiba
$2.07
Each (In a Pack of 5)
units
Through Hole MOSFET - 1 4 PDIP DC - 50 mA 2.5 kVrms - - - -
RS Stock No. 178-3237
Mfr. Part No.ACPL-M61L-060E
BrandBroadcom
$2.453
Each (In a Tube of 100)
units
Surface Mount - 1.7V 1 5 SO DC 0.012µs 8 mA 3.75 kVrms Yes - - 0.012µs
RS Stock No. 166-3801
Mfr. Part No.H11AG1M
$0.844
Each (In a Bag of 1000)
units
Through Hole Phototransistor 1.5V 1 6 MDIP DC 5µs 50 mA 7.5 kVrms - 300% - 5µs
RS Stock No. 808-8799
Mfr. Part No.FOD817AS
$0.568
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 MDIP DC 18µs 50 mA 5000 Vrms - 160% - 18µs
RS Stock No. 174-4186
Mfr. Part No.HCPL-0466-500E
BrandBroadcom
$4.36
Each (In a Pack of 5)
units
Surface Mount - 1.8V 1 8 SO - - 50 mA 3750 Vrms Yes 90% 44% -
RS Stock No. 806-5989
Mfr. Part No.MOC3022TVM
$0.813
Each (In a Pack of 10)
units
Through Hole Phototriac 1.5V 1 6 DIP AC - 60 mA 5300 Vrms Yes - - -
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