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. 760-3221
Mfr. Part No.TLP350(TP5,F)
BrandToshiba
$5.67
Each
units
Surface Mount IGBT Gate Drive, MOSFET 1.8V 2 8 PDIP DC 15ns 20 mA 3750 V ac - - - 8ns
RS Stock No. 124-1346
Mfr. Part No.HCPL2631
$2.706
Each (In a Tube of 50)
units
Through Hole Logic Gate 1.75V 2 8 MDIP DC 50ns 30 mA 2500 V ac Yes - - 12ns
RS Stock No. 178-4749
Mfr. Part No.MOC3043M
$1.133
Each (In a Tube of 50)
units
Through Hole Phototriac - 1 6 PDIP - - 60 mA 7.5 kVrms - - - -
RS Stock No. 178-3154
Mfr. Part No.HCPL-4503-000E
BrandBroadcom
$2.486
Each (In a Tube of 50)
units
Through Hole Transistor 1.7V 1 8 PDIP DC - 25 mA 3.75 kVrms Yes 50% 19 % -
RS Stock No. 547-3712
Mfr. Part No.HCPL-4503-000E
BrandBroadcom
$3.52
Each
units
Through Hole Transistor 1.7V 1 8 PDIP DC - 25 mA 3.75 kVrms Yes 50% 19 % -
RS Stock No. 145-1599
Mfr. Part No.CNY74-4H
BrandVishay
$2.123
Each (In a Tube of 25)
units
Through Hole Transistor 1.6V 4 16 PDIP DC 3µs 60 mA 5.3 kVrms - 600% 50 % 4.7µs
RS Stock No. 168-7806
Mfr. Part No.TLP152
BrandToshiba
$1.782
Each (In a Tube of 125)
units
Surface Mount IC 1.8V 1 5 SOIC DC 18ns 15 mA 3.75 kVrms Yes - - 22ns
RS Stock No. 168-9683
Mfr. Part No.MOC3021
BrandLite-On
$0.627
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 922-5804
Mfr. Part No.HCPL-2630-000E
BrandBroadcom
$4.422
Each (In a Tube of 50)
units
Through Hole Transistor 1.75V 2 8 DIP DC 24ns 20 mA 3750 V ac Yes - - 10ns
RS Stock No. 145-4326
Mfr. Part No.FODM8061
$1.727
Each (In a Tube of 100)
units
Surface Mount Logic Gate 1.8V - 5 SO DC 20ns 50 mA 3.75 kVrms Yes - - 10ns
RS Stock No. 710-4887
Mfr. Part No.ILD213T
BrandVishay
$1.91
Each (In a Pack of 5)
units
Surface Mount Transistor 1.55V 2 8 SOIC DC - 30 mA 4000 V ac - - 100 % -
RS Stock No. 919-0874
Mfr. Part No.ILD213T
BrandVishay
$0.741
Each (On a Reel of 2000)
units
Surface Mount Transistor 1.55V 2 8 SOIC DC - 30 mA 4000 V ac - - 100 % -
RS Stock No. 903-4232
Mfr. Part No.FODM8061R2
$2.266
Each (In a Pack of 10)
units
Surface Mount Schottky-Clamped Transistor 1.8V 1 5 Mini-Flat DC 20ns 50 mA 3750 V ac Yes - - 10ns
RS Stock No. 186-022
Mfr. Part No.TLP350(F)
BrandToshiba
$3.955
Each (In a Pack of 2)
units
Through Hole IGBT Gate Drive, MOSFET - 1 8 PDIP DC - - 3.75 kVrms Yes - - -
RS Stock No. 168-7814
Mfr. Part No.TLP188(E
BrandToshiba
$0.851
Each (In a Tube of 125)
units
Surface Mount Transistor 1.4V 1 4 SOIC AC 2µs 50 mA 3.75 kVrms - 600% - 3µs
RS Stock No. 796-5204
Mfr. Part No.TLP152
BrandToshiba
$3.00
Each (In a Pack of 5)
units
Surface Mount IC 1.8V 1 5 SOIC DC 18ns 15 mA 3750 Vrms Yes - - 22ns
RS Stock No. 864-9136
Mfr. Part No.FOD3180TV
$3.026
Each (In a Pack of 5)
units
Through Hole MOSFET Gate Driver 1.8V 1 8 DIP - 75ns 25 mA 5000 Vrms - - - 55ns
RS Stock No. 145-1921
Mfr. Part No.SFH628A-3
BrandVishay
$1.033
Each (In a Tube of 100)
units
Through Hole Transistor 1.5V 1 4 PDIP AC - 50 mA 5.3 kVrms - 320% 100 % -
RS Stock No. 178-4756
Mfr. Part No.MOC3041M
$1.041
Each (In a Tube of 50)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7.5 kVrms Yes - - -
RS Stock No. 547-3908
Mfr. Part No.HCPL-2200-000E
BrandBroadcom
$5.40
Each
units
Through Hole Logic Gate 1.75V 1 8 DIP DC 55ns 5 mA 3.75 kVrms Yes - - 15ns
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