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. 177-4798
Mfr. Part No.TLP251(F)
BrandToshiba
$1.808
Each (In a Tube of 20)
units
- - - - - - - - - - - - - -
RS Stock No. 166-3059
Mfr. Part No.4N29SM
$0.601
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. 169-8585
Mfr. Part No.FOD817A
$0.199
Each (In a Bag of 2000)
units
Through Hole Phototransistor 1.4V 1 4 DIP DC 4µs 50 mA 5 kVrms - 160% - 3µs
RS Stock No. 896-2549
Mfr. Part No.TLP2630(F)
BrandToshiba
$4.29
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. 168-7421
Mfr. Part No.TLP2531(F)
BrandToshiba
$2.02
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
$6.463
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. 625-8687
Mfr. Part No.TLP2630(F)
BrandToshiba
$4.05
Each
units
Through Hole Transistor 1.75V 2 8 DIP - 30ns 20 mA 2.5 kVrms Yes - - 30ns
RS Stock No. 145-1981
Mfr. Part No.VO610A-2
BrandVishay
$0.946
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. 806-6042
Mfr. Part No.MOC3043TVM
$1.753
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. 862-9381
Mfr. Part No.MID400S
$6.556
Each (In a Pack of 5)
units
Surface Mount Open Collector 1.5V 1 8 DIP AC 1ms - 2.5 kVrms Yes - - 1ms
RS Stock No. 100-0151
Mfr. Part No.TLP250(F)
BrandToshiba
$3.702
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. 773-3671
Mfr. Part No.VO610A-2
BrandVishay
$1.058
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. 178-3205
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
$3.476
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 453-1126
Mfr. Part No.MOC3061X
BrandIsocom
$1.671
Each (In a Pack of 10)
units
Through Hole Phototriac - 1 6 PDIP - - 50 mA 5.3 kVrms - - - -
RS Stock No. 547-4169
Mfr. Part No.HCPL-4100-000E
BrandBroadcom
$12.43
Each
units
Through Hole Transistor 20V - 8 DIP DC 16ns 250 μA 3.75 kVrms Yes - - 23ns
RS Stock No. 922-5668
Mfr. Part No.HCPL-7721-000E
BrandBroadcom
$7.766
Each (In a Tube of 50)
units
Through Hole Transistor 6.5V - 8 DIP DC 9ns 10 μA 3750 V ac Yes - - 8ns
RS Stock No. 796-5213
Mfr. Part No.TLP175A
BrandToshiba
$1.948
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. 161-1151
Mfr. Part No.MOC3010
BrandIsocom
$4.528
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP AC - 50 mA 5300 (Minimum) Vrms - - - -
RS Stock No. 799-5306
Mfr. Part No.TLP250H(F)
BrandToshiba
$3.685
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. 708-5279
Mfr. Part No.4N26
BrandVishay
$0.69
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
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