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. 922-4810
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
R 50.396
Each (In a Pack of 5)
units
- - 1.8V - - - - - 16 mA 3750 Vrms - - - -
RS stock no. 178-3205
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
R 29.405
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS stock no. 125-0602
Mfr. Part No.TLP3906(E(O
BrandToshiba
R 13.909
Each (In a Pack of 10)
units
Surface Mount Photodiode 1.8V 1 4 SOIC DC 0.2ms 30 mA 3.75 kVrms - - - 0.3ms
RS stock no. 922-5633
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
R 30.148
Each (In a Tube of 50)
units
Surface Mount Transistor 1.8V 1 8 DIP DC 0.1µs 16 mA 3750 V ac Yes - - 0.1µs
RS stock no. 450-812
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
R 45.035
Each (In a Pack of 2)
units
Surface Mount Transistor 1.8V 1 8 DIP DC 0.1µs 16 mA 3.75 kVrms Yes - - 0.1µs
RS stock no. 625-7909
Mfr. Part No.6N137(F)
BrandToshiba
R 20.53
Each
units
Through Hole Transistor 1.75V 1 8 DIP DC 30ns 20 mA 2.5 kVrms Yes 1000% 1000 % 30ns
RS stock no. 919-0092
Mfr. Part No.IL300
BrandVishay
R 51.505
Each (In a Tube of 50)
units
Through Hole Photodiode 1.5V 1 8 PDIP DC 1.75µs 60 mA 5300 V ac - - - 1.75µs
RS stock no. 708-5364
Mfr. Part No.IL300
BrandVishay
R 67.524
Each (In a Pack of 5)
units
Through Hole Photodiode 1.5V 1 8 PDIP DC 1.75µs 60 mA 5300 V ac - - - 1.75µs
RS stock no. 864-9136
Mfr. Part No.FOD3180TV
R 26.816
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. 885-1279
Mfr. Part No.TLP250H(D4,F)
BrandToshiba
R 22.788
Each (In a Pack of 5)
units
Through Hole Photo IC 1.8V 1 8 DIP - 50ns 3 mA 2500 Vrms Yes - - 50ns
RS stock no. 168-8538
Mfr. Part No.ISP817XB
BrandIsocom
R 2.439
Each (In a Tube of 100)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5.3 kVrms - 260% 130 % 3µs
RS stock no. 453-0640
Mfr. Part No.ISP817XB
BrandIsocom
R 18.04
Each (In a Pack of 10)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5.3 kVrms - 260% 130 % 3µs
RS stock no. 760-3158
Mfr. Part No.TLP124(BV-TPL,F)
BrandToshiba
R 6.938
Each (In a Pack of 10)
units
Surface Mount Transistor 1.3V 1 4 SOP AC, DC 8µs 50 mA 3750 V ac - 1200% 200 % 8µs
RS stock no. 760-3154
Mfr. Part No.TLP124(BV,F)
BrandToshiba
R 8.766
Each (In a Pack of 10)
units
Surface Mount Transistor 1.3V 1 4 SOP AC, DC 8µs 50 mA 3750 V ac - 1200% 200 % 8µs
RS stock no. 168-7412
Mfr. Part No.TLP124(BV,F)
BrandToshiba
R 5.499
Each (On a Tape of 150)
units
Surface Mount Transistor 1.3V 1 4 SOP AC, DC 8µs 50 mA 3.75 kVrms - 1200% 200 % 8µs
RS stock no. 903-2508
Mfr. Part No.H11AA1
BrandVishay
R 12.88
Each (In a Tube of 50)
units
Through Hole Transistor 1.5V 1 6 DIP AC - 60 mA 5.3 kVrms - - - -
RS stock no. 885-0967
Mfr. Part No.TLP291(V4GBTP,SE(T
BrandToshiba
R 1.836
Each (In a Pack of 50)
units
Surface Mount Phototransistor 1.4V 1 4 SO4 DC 4µs 50 mA 3750 Vrms - 400% - 7µs
RS stock no. 168-9678
Mfr. Part No.LTV-846S
BrandLite-On
R 11.273
Each (In a Tube of 25)
units
Surface Mount Transistor 1.4V 4 16 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS stock no. 739-0252
Mfr. Part No.MOC3041M
R 9.536
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7500 V ac Yes - - -
RS stock no. 178-4756
Mfr. Part No.MOC3041M
R 8.344
Each (In a Tube of 50)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7.5 kVrms Yes - - -