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. 166-2062
Mfr. Part No.FOD3184
TWD33.50
Each (In a Bag of 1000)
units
Through Hole Buffer, Totem-Pole 1.8V 1 8 MDIP DC 38ns 25 mA 5 kVrms - - - 24ns
RS Stock No. 808-8730
Mfr. Part No.FOD3184
TWD87.00
Each (In a Pack of 2)
units
Through Hole Buffer, Totem-Pole 1.8V 1 8 MDIP DC 38ns 25 mA 5000 Vrms - - - 24ns
RS Stock No. 807-6654
Mfr. Part No.HCPL2631SD
TWD97.00
Each (In a Pack of 4)
units
Surface Mount Logic Gate 1.8V 2 8 MDIP DC 50µs 30 mA 2500 Vrms Yes - - 12µs
RS Stock No. 166-2382
Mfr. Part No.HCPL2631SD
TWD33.90
Each (On a Reel of 1000)
units
Surface Mount Logic Gate 1.8V 2 8 MDIP DC 50µs 30 mA 2.5 kVrms Yes - - 12µs
RS Stock No. 124-1346
Mfr. Part No.HCPL2631
TWD70.20
Each (In a Tube of 50)
units
Through Hole Logic Gate 1.75V 2 8 MDIP DC 50ns 30 mA 2500 V ac Yes - - 12ns
RS Stock No. 761-3375
Mfr. Part No.HCPL2631
TWD83.00
Each (In a Pack of 2)
units
Through Hole Logic Gate 1.75V 2 8 MDIP DC 50ns 30 mA 2500 V ac Yes - - 12ns
RS Stock No. 671-1444
Mfr. Part No.MOC3062M
TWD34.00
Each (In a Pack of 5)
units
Through Hole Triac - 1 6 PDIP - - 60 mA 7.5 kVrms - - - -
RS Stock No. 739-0256
Mfr. Part No.MOC3083M
TWD30.60
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7500 V ac - - - -
RS Stock No. 169-8548
Mfr. Part No.MOC3062M
TWD11.20
Each (In a Bag of 1000)
units
Through Hole Triac - 1 6 PDIP - - 60 mA 7.5 kVrms - - - -
RS Stock No. 166-2444
Mfr. Part No.MOC3083M
TWD10.30
Each (In a Bag of 1000)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7.5 kVrms - - - -
RS Stock No. 761-4530
Mfr. Part No.MOCD217R2M
TWD32.60
Each (In a Pack of 5)
units
Surface Mount Transistor 1.3V 2 8 SOIC DC 3.2µs 60 mA 2500 V ac - 130% 100 % 4.7µs
RS Stock No. 903-4232
Mfr. Part No.FODM8061R2
TWD55.60
Each (In a Pack of 10)
units
Surface Mount Schottky-Clamped Transistor 1.8V 1 5 Mini-Flat DC 20ns 50 mA 3750 V ac Yes - - 10ns
RS Stock No. 903-4276
Mfr. Part No.HCPL2611
TWD72.00
Each (In a Pack of 5)
units
Through Hole Photodetector 1.8V 1 8 PDIP DC 50ns 50 mA 2.5 kVrms Yes - - 12ns
RS Stock No. 166-3243
Mfr. Part No.FODM8061R2
TWD23.80
Each (On a Reel of 2500)
units
Surface Mount Schottky-Clamped Transistor 1.8V 1 5 Mini-Flat DC 20ns 50 mA 3.75 kVrms Yes - - 10ns
RS Stock No. 178-7558
Mfr. Part No.MOCD217R2M
TWD10.10
Each (On a Reel of 2500)
units
Surface Mount Transistor 1.3V 2 8 SOIC DC 3.2µs 60 mA 2.5 kVrms - 130% 100 % 4.7µs
RS Stock No. 178-4821
Mfr. Part No.MOCD217M
TWD14.70
Each (In a Tube of 100)
units
Surface Mount Phototransistor 1.3V 2 8 SOIC DC 3.2µs 200 mA 2.5 kVrms Yes 100% - 4.7µs
RS Stock No. 739-4983
Mfr. Part No.FODM8061
TWD60.00
Each
units
Surface Mount Logic Gate 1.8V - 5 SO DC 20ns 50 mA 3750 V ac Yes - - 10ns
RS Stock No. 166-2235
Mfr. Part No.HCPL2611
TWD28.20
Each (In a Bag of 1000)
units
Through Hole Photodetector 1.8V 1 8 PDIP DC 50ns 50 mA 2.5 kVrms Yes - - 12ns
RS Stock No. 917-5532
Mfr. Part No.MOCD217M
TWD27.80
Each (In a Pack of 10)
units
Surface Mount Phototransistor 1.3V 2 8 SOIC DC 3.2µs 200 mA 2500 V ac Yes 100% - 4.7µs
RS Stock No. 761-3640
Mfr. Part No.HCPL2731
TWD78.50
Each (In a Pack of 2)
units
Through Hole Transistor 1.75V 2 8 MDIP DC 22µs 20 mA 2500 V ac Yes 2000% - 3µs