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. 171-2964
Mfr. Part No.H11L1 V2
BrandIsocom
MYR2.134
Each (In a Tube of 65)
units
Through Hole Schmitt Trigger 1.5V 1 6 - DC 0.1µs 60 (Forward) mA 5 kVrms - - - 0.1µs
RS Stock No. 124-1738
Mfr. Part No.HCPL2630
MYR6.91
Each (In a Tube of 50)
units
Through Hole Logic Gate 1.8V 1 8 DIP DC 50ns 50 mA 2500 V ac Yes - - 12ns
RS Stock No. 919-0076
Mfr. Part No.CNY17-3
BrandVishay
MYR1.055
Each (In a Tube of 50)
units
Through Hole Transistor 1.65V 1 6 DIP DC 3µs 60 mA 5 kVrms - 200% - 14µs
RS Stock No. 708-5304
Mfr. Part No.CNY17-3
BrandVishay
MYR1.055
Each (In a Pack of 20)
units
Through Hole Transistor 1.65V 1 6 PDIP DC 3µs 60 mA 5300 V ac - 200% 100 % 14µs
RS Stock No. 896-2505
Mfr. Part No.TLP185(BL,SE(T
BrandToshiba
MYR0.616
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO6 DC 5µs 1 A 3750 Vrms - 400% - 9µs
RS Stock No. 699-8357
Mfr. Part No.TCMT4100
BrandVishay
MYR7.48
Each (In a Pack of 2)
units
Surface Mount Transistor 1.6V 4 16 Mini-Flat DC 3µs 60 mA 3750 V ac - 600% 50 % 4.7µs
RS Stock No. 691-2154
Mfr. Part No.LTV-817-C
BrandLite-On
MYR0.98
Each (In a Pack of 10)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 400% 200 % 3µs
RS Stock No. 178-7025
Mfr. Part No.LTV-817S
BrandLite-On
MYR0.69
Each (In a Tube of 100)
units
Surface Mount Transistor 1.4V 1 4 SMD DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 693-6794
Mfr. Part No.ACPL-244-500E
BrandBroadcom
MYR8.284
Each (In a Pack of 5)
units
Surface Mount Transistor 1.4V 4 16 SOIC AC 2µs 50 mA 3 kVrms - 400% 20 % 3µs
RS Stock No. 168-9667
Mfr. Part No.LTV-817-C
BrandLite-On
MYR0.69
Each (In a Tube of 100)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 400% 200 % 3µs
RS Stock No. 168-9685
Mfr. Part No.MOC3022
BrandLite-On
MYR1.47
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 100-0150
Mfr. Part No.TLP127(U,F)
BrandToshiba
MYR2.99
Each (In a Pack of 25)
units
Surface Mount Darlington 1.3V 1 4 SOP DC 40µs 50 mA 2500 V ac - 4000% 1000 % 15µs
RS Stock No. 127-8462
Mfr. Part No.LTV-817S-TA
BrandLite-On
MYR0.809
Each (In a Pack of 50)
units
Surface Mount Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5000 Vrms - 600% - 3µs
RS Stock No. 178-1595
Mfr. Part No.ACPL-227-50BE
BrandBroadcom
MYR1.77
Each (On a Reel of 2000)
units
- - - - - - - - - - - - - -
RS Stock No. 453-1722
Mfr. Part No.H11L1
BrandIsocom
MYR3.437
Each (In a Pack of 10)
units
Through Hole Transistor 1.5V - 6 DIP - 0.5µs 50 mA 5 kVrms - - - 0.5µs
RS Stock No. 799-5270
Mfr. Part No.TLP185(BL,SE(T
BrandToshiba
MYR0.832
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO6 DC 5µs 1 A 3750 Vrms - 400% - 9µs
RS Stock No. 691-2182
Mfr. Part No.LTV-817S
BrandLite-On
MYR0.98
Each (In a Pack of 10)
units
Surface Mount Transistor 1.4V 1 4 SMD DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 178-0898
Mfr. Part No.CNY17F-2
BrandVishay
MYR1.672
Each (In a Tube of 65)
units
Through Hole Phototransistor 1.65V 1 6 PDIP DC 3µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 839-9979
Mfr. Part No.HCNW4504-300E
BrandBroadcom
MYR11.07
Each (In a Pack of 2)
units
Surface Mount Phototransistor 1.95V 1 8 DIP DC - 400 mA 5000 Vrms Yes 68% - -
RS Stock No. 178-1570
Mfr. Part No.ACPL-244-500E
BrandBroadcom
MYR4.05
Each (On a Reel of 2000)
units
Surface Mount Transistor 1.4V 4 16 SOIC AC 2µs 50 mA 3 kVrms - 400% 20 % 3µs
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