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. 166-2052
Mfr. Part No.MID400SD
$3.575
Each (On a Reel of 1000)
units
Surface Mount Logic Gate 1.5V 2 8 MDIP AC, DC 1ms - 2.5 kVrms Yes - - 1ms
RS Stock No. 166-3059
Mfr. Part No.4N29SM
$0.575
Each (In a Bag of 1000)
units
Surface Mount Darlington 1.5V 1 6 DIP DC 5µs 3 A 7.5 kVrms Yes 100% - 40µs
RS Stock No. 806-6042
Mfr. Part No.MOC3043TVM
$1.478
Each (In a Pack of 10)
units
Through Hole Triac 1.5V 1 6 DIP AC - 60 mA 7500 V ac Yes - - -
RS Stock No. 799-5315
Mfr. Part No.TLP2630(F)
BrandToshiba
$3.605
Each (In a Pack of 2)
units
Through Hole Transistor 1.75V 1 8 DIP AC 30ns 5 mA 2500 Vrms Yes - - 30ns
RS Stock No. 145-1981
Mfr. Part No.VO610A-2
BrandVishay
$0.28
Each (In a Tube of 100)
units
Through Hole Phototransistor 1.6V 1 4 DIP DC 3µs 60 mA 5 kVrms - 125% - 4.7µs
RS Stock No. 761-4439
Mfr. Part No.FOD817A
$0.444
Each (In a Pack of 10)
units
Through Hole Phototransistor 1.4V 1 4 DIP DC 4µs 50 mA 5000 V ac - 160% - 3µs
RS Stock No. 625-8413
Mfr. Part No.TLP251(F)
BrandToshiba
$4.29
Each
units
Through Hole Buffer, Totem-Pole 1.8V 1 8 PDIP DC - 10 mA 2.5 kVrms Yes - - -
RS Stock No. 922-4810
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
$4.494
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
$3.333
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 168-7421
Mfr. Part No.TLP2531(F)
BrandToshiba
$2.69
Each (In a Tube of 50)
units
Through Hole Transistor 1.7V 2 8 DIP DC 0.3µs 25 mA 2.5 kVrms Yes 30% 19 % 0.3µs
RS Stock No. 166-2128
Mfr. Part No.MID400S
$3.166
Each (In a Bag of 1000)
units
Surface Mount Logic Gate 1.5V 2 8 MDIP AC, DC 1ms - 2.5 kVrms Yes - - 1ms
RS Stock No. 773-3671
Mfr. Part No.VO610A-2
BrandVishay
$0.284
Each (In a Bag of 5)
units
Through Hole Phototransistor 1.6V 1 4 DIP DC 3µs 60 mA 5000 Vrms - 125% - 4.7µs
RS Stock No. 625-8687
Mfr. Part No.TLP2630(F)
BrandToshiba
$4.03
Each
units
Through Hole Transistor 1.75V 2 8 DIP - 30ns 20 mA 2.5 kVrms Yes - - 30ns
RS Stock No. 168-9679
Mfr. Part No.LTV-847
BrandLite-On
$1.048
Each (In a Tube of 25)
units
Through Hole Transistor 1.4V 4 16 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 100-0151
Mfr. Part No.TLP250(F)
BrandToshiba
$3.272
Each (In a Pack of 5)
units
Through Hole Transistor 1.3V 1 8 PDIP DC 2µs 300 mA 2500 V ac Yes - - -
RS Stock No. 896-2549
Mfr. Part No.TLP2630(F)
BrandToshiba
$3.435
Each (In a Pack of 2)
units
Through Hole IC 1.75V 1 8 DIP AC 30ns 5 mA 2500 Vrms Yes - - 30ns
RS Stock No. 169-8557
Mfr. Part No.FOD817A300
$0.197
Each (In a Bag of 2000)
units
Through Hole Transistor 70V 1 4 DIP-B DC 18µs 50 mA 5 kVrms - 160% - 18µs
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. 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
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
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