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. 171-3892
Mfr. Part No.OPI 1264B
BrandOptek
£2.02
Each
Units
Through Hole Transistor 1.6V 1 4 - DC - 40 mA 10 kV dc - - 50 % -
RS Stock No. 170-0764
Mfr. Part No.OPI 1264B
BrandOptek
£1.987
Each (In a Bag of 25)
Units
Through Hole Transistor 1.6V 1 4 - DC - 40 mA 10 kV dc - - 50 % -
RS Stock No. 597-289
Mfr. Part No.4N25
BrandIsocom
£0.41
Each
Units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 20 % 2µs
RS Stock No. 168-8528
Mfr. Part No.4N25
BrandIsocom
£0.294
Each (In a Tube of 65)
Units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 20 % 2µs
RS Stock No. 145-1580
Mfr. Part No.ILQ615-2
BrandVishay
£1.887
Each (In a Tube of 25)
Units
Through Hole Transistor 1.3V 4 16 PDIP DC 2.8µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 110-208
Mfr. Part No.ILQ615-2
BrandVishay
£2.64
Each
Units
Through Hole Transistor 1.3V 4 16 PDIP DC 2.8µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 922-4810
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
£2.32
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
£1.48
Each (In a Tube of 50)
Units
- - - - - - - - - - - - - -
RS Stock No. 547-4181
Mfr. Part No.HCPL-316J-000E
BrandBroadcom
£4.88
Each
Units
Surface Mount BiCMOS/DMOS - - 16 SOIC - 0.1µs - 3.75 kVrms Yes - - -
RS Stock No. 922-5851
Mfr. Part No.HCPL-316J-000E
BrandBroadcom
£3.55
Each (In a Tube of 45)
Units
Surface Mount BiCMOS/DMOS - - 16 SOIC - 0.1µs - 3750 V ac Yes - - -
RS Stock No. 169-8133
Mfr. Part No.KPC357NT0B
BrandCosmo
£0.142
Each (On a Reel of 3000)
Units
Surface Mount Transistor 1.4V - 4 DIP - 5µs 50 mA 3.75 kVrms - 260% 130 % 4µs
RS Stock No. 395-6293
Mfr. Part No.KPC357NT0B
BrandCosmo
£0.256
Each (In a Pack of 10)
Units
Surface Mount Transistor 1.4V - 4 DIP - 5µs 50 mA 3.75 kVrms - 260% 130 % 4µs
RS Stock No. 307-064A
Mfr. Part No.ISQ74
BrandIsocom
£1.038
Each (In a Pack of 50)
Units
Through Hole Transistor 1.3V - 16 DIP - 2.6µs 50 mA 5300 V ac Yes 50% - -
RS Stock No. 307-064
Mfr. Part No.ISQ74
BrandIsocom
£1.21
Each
Units
Through Hole Transistor 1.3V - 16 DIP - 2.6µs 50 mA 5.3 kVrms Yes 50% 50 % -
RS Stock No. 456-383
Mfr. Part No.H11F1M
£2.56
Each (In a Pack of 5)
Units
Through Hole Transistor 1.75V 1 6 PDIP DC - 60 mA 7.5 kVrms Yes - - -
RS Stock No. 146-1959
Mfr. Part No.H11F1M
£1.193
Each (In a Bag of 1000)
Units
Through Hole Transistor 1.75V 1 6 PDIP DC - 60 mA 7.5 kVrms Yes - - -
RS Stock No. 453-1722
Mfr. Part No.H11L1
BrandIsocom
£0.647
Each (In a Pack of 10)
Units
Through Hole Transistor 1.5V - 6 DIP - 0.5µs 50 mA 5 kVrms - - - 0.5µs
RS Stock No. 171-2964
Mfr. Part No.H11L1 V2
BrandIsocom
£0.32
Each (In a Tube of 65)
Units
Through Hole Schmitt Trigger 1.5V 1 6 - DC 0.1µs 60 (Forward) mA 5 kVrms - - - 0.1µs
RS Stock No. 165-2468
Mfr. Part No.4N35
BrandVishay
£0.283
Each (In a Tube of 50)
Units
Through Hole Transistor 1.5V 1 6 PDIP DC - 50 mA 5 kVrms - 50% 40 % -
RS Stock No. 699-8155
Mfr. Part No.4N35
BrandVishay
£0.283
Each (In a Pack of 20)
Units
Through Hole Transistor 1.5V 1 6 PDIP DC - 50 mA 5000 V ac - 50% 40 % -