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. 195-4100
Mfr. Part No.MOC3010
BrandIsocom
$2.73
Each
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5.3 kVrms - - - -
RS Stock No. 547-4169
Mfr. Part No.HCPL-4100-000E
BrandBroadcom
$11.15
Each
units
Through Hole Transistor 20V - 8 DIP DC 16ns 250 μA 3.75 kVrms Yes - - 23ns
RS Stock No. 450-878
Mfr. Part No.HCPL-7721-000E
BrandBroadcom
$8.51
Each
units
Through Hole Transistor 6.5V - 8 DIP DC 9ns 10 μA 3.75 kVrms Yes - - 8ns
RS Stock No. 896-2546
Mfr. Part No.TLP250H(F)
BrandToshiba
$2.89
Each (In a Pack of 2)
units
Through Hole IC 1.8V 1 8 DIP AC 50ns 20 mA 5000 Vrms Yes - - 50ns
RS Stock No. 124-1738
Mfr. Part No.HCPL2630
$2.646
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. 671-1419
Mfr. Part No.HCPL2630
$3.19
Each
units
Through Hole Logic Gate 1.8V 1 8 DIP DC 50ns 50 mA 2.5 kVrms Yes - - 12ns
RS Stock No. 922-5813
Mfr. Part No.HCPL-J312-000E
BrandBroadcom
$4.068
Each (In a Tube of 50)
units
Through Hole Transistor 1.95V - 8 DIP DC 0.1µs 16 mA 3750 V ac Yes - - 0.1µs
RS Stock No. 708-5279
Mfr. Part No.4N26
BrandVishay
$0.658
Each (In a Pack of 20)
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5000 V ac - 50% 20 % 2µs
RS Stock No. 885-1424
Mfr. Part No.TLP175A(E(T
BrandToshiba
$1.364
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 799-5306
Mfr. Part No.TLP250H(F)
BrandToshiba
$3.325
Each (In a Pack of 2)
units
Through Hole Transistor 1.8V 1 8 DIP AC 50ns 20 mA 5000 Vrms Yes - - 50ns
RS Stock No. 796-5213
Mfr. Part No.TLP175A
BrandToshiba
$1.712
Each (In a Pack of 5)
units
Surface Mount MOSFET 1.4V 1 4 SOIC AC 1ms 80 mA 3750 Vrms - - - 1ms
RS Stock No. 919-0058
Mfr. Part No.4N26
BrandVishay
$0.324
Each (In a Tube of 50)
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5000 V ac - 50% 20 % 2µs
RS Stock No. 922-5854
Mfr. Part No.HCPL-4100-000E
BrandBroadcom
$8.749
Each (In a Tube of 50)
units
Through Hole Transistor 20V - 8 DIP DC 16ns 250 μA 3750 V ac Yes - - 23ns
RS Stock No. 168-7808
Mfr. Part No.TLP175A
BrandToshiba
$1.375
Each (In a Tube of 125)
units
Surface Mount MOSFET 1.4V 1 4 SOIC AC 1ms 80 mA 3.75 kVrms - - - 1ms
RS Stock No. 161-1010
Mfr. Part No.MOC3010
BrandIsocom
$2.357
Each (In a Tube of 65)
units
Through Hole Triac 1.5V 1 6 DIP AC - 50 mA 5300 (Minimum) Vrms - - - -
RS Stock No. 708-5275
Mfr. Part No.4N25
BrandVishay
$0.636
Each (In a Pack of 50)
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5000 V ac - 50% 20 % 2µs
RS Stock No. 547-3992
Mfr. Part No.HCPL-J312-000E
BrandBroadcom
$4.93
Each
units
Through Hole Transistor 1.95V - 8 DIP DC 0.1µs 16 mA 3.75 kVrms Yes - - 0.1µs
RS Stock No. 161-1151
Mfr. Part No.MOC3010
BrandIsocom
$4.17
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP AC - 50 mA 5300 (Minimum) Vrms - - - -
RS Stock No. 619-2010
Mfr. Part No.KB827
BrandKingbright
$0.945
Each (In a Pack of 20)
units
Through Hole Phototransistor 1.4V 2 8 DIP, PDIP DC 4µs 50 mA 5 kVrms - 600% 100 % 3µs
RS Stock No. 739-0265
Mfr. Part No.FOD817A300
$0.644
Each (In a Pack of 5)
units
Through Hole Transistor 70V 1 4 DIP-B DC 18µs 50 mA 5000 Vrms - 160% - 18µs
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