Optocoupler ICs

An optocoupler IC, 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 IC 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. 352-5467
Mfr. Part No.AQY210EH
BrandPanasonic
£1.30
Each
Units
Through Hole MOSFET 1.5V - 4 DIP DC - 50 mA 5 kVrms - - - -
RS Stock No. 173-8175
Mfr. Part No.AQV251
BrandPanasonic
£5.395
Each (In a Tube of 50)
Units
Through Hole MOSFET - - 6 DIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 171-8623
Mfr. Part No.AQV251
BrandPanasonic
£4.63
Each
Units
Through Hole MOSFET - - 6 DIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 444-576
Mfr. Part No.AQY412S
BrandPanasonic
£4.39
Each
Units
Surface Mount - 1.5V - 4 SOP DC - 50 mA 1500 V ac - - - -
RS Stock No. 173-8177
Mfr. Part No.AQV253
BrandPanasonic
£4.352
Each (In a Tube of 50)
Units
Through Hole MOSFET - - 6 DIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 171-8645
Mfr. Part No.AQV253
BrandPanasonic
£3.96
Each
Units
Through Hole MOSFET - - 6 DIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 352-5495
Mfr. Part No.AQY414EH
BrandPanasonic
£3.54
Each
Units
Through Hole MOSFET - - 4 DIP DC - 50 mA 5 kVrms - - - -
RS Stock No. 373-1167
Mfr. Part No.AQY-210EHA
BrandPanasonic
£1.29
Each
Units
Surface Mount MOSFET 1.5V - 4 SMT DC - 50 mA 5 kVrms - - - -
RS Stock No. 373-1173
Mfr. Part No.AQY414EHA
BrandPanasonic
£3.12
Each
Units
Surface Mount MOSFET - - 4 PDIP DC - 50 mA 5 kVrms - - - -
RS Stock No. 444-823
Mfr. Part No.AQY277
BrandPanasonic
£8.84
Each
Units
Through Hole - 1.5V - 4 DIP DC - 50 mA 2.5 kVrms - - - -
RS Stock No. 449-076
Mfr. Part No.AQV214
BrandPanasonic
£4.37
Each
Units
Through Hole MOSFET - - 6 DIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 373-1189
Mfr. Part No.AQY272
BrandPanasonic
£8.76
Each
Units
Through Hole MOSFET - - 4 DIP DC - 50 mA 2.5 kVrms - - - -
RS Stock No. 373-1195
Mfr. Part No.AQY272A
BrandPanasonic
£9.12
Each
Units
Surface Mount MOSFET - - 4 PDIP DC - 50 mA 2.5 kVrms - - - -
RS Stock No. 444-683
Mfr. Part No.AQV259A
BrandPanasonic
£5.80
Each
Units
Surface Mount MOSFET - - 6 PDIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 444-788
Mfr. Part No.AQY410EH
BrandPanasonic
£3.86
Each
Units
Through Hole MOSFET - - 4 DIP DC - 50 mA 5 kVrms - - - -
RS Stock No. 173-8178
Mfr. Part No.AQV254
BrandPanasonic
£5.395
Each (In a Tube of 50)
Units
Through Hole MOSFET - - 6 DIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 171-8667
Mfr. Part No.AQV254
BrandPanasonic
£4.25
Each
Units
Through Hole MOSFET - - 6 DIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 449-060
Mfr. Part No.AQV212
BrandPanasonic
£4.37
Each
Units
Through Hole MOSFET - - 6 DIP DC - 50 mA 1.5 kVrms - - - -
RS Stock No. 373-1202
Mfr. Part No.AQY274
BrandPanasonic
£7.97
Each
Units
Through Hole MOSFET 1.5V - 4 DIP DC - 50 mA 2.5 kVrms - - - -
RS Stock No. 449-064
Mfr. Part No.AQV414S
BrandPanasonic
£4.41
Each
Units
Surface Mount - 1.5V - 6 SOP DC - 50 mA 1500 V ac - - - -