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. 739-4955
Mfr. Part No.FOD410
HK$30.32
Each
units
Through Hole Triac 1.5V 1 6 DIP DC - 30 mA 5000 V ac Yes - - -
RS Stock No. 761-4457
Mfr. Part No.HCPL0501
HK$19.125
Each (In a Pack of 2)
units
Surface Mount Phototransistor 1.8V 1 8 SOIC DC 0.3µs 25 mA 2500 V ac Yes 50% - 0.45µs
RS Stock No. 145-2599
Mfr. Part No.VO615A-2X019T
BrandVishay
HK$2.266
Each (On a Reel of 1000)
units
Surface Mount Phototransistor 1.6V 1 4 PDIP DC 3µs 60 mA 5 kVrms - 125% 63 % 4.7µs
RS Stock No. 174-3613
Mfr. Part No.ACPL-C79A-500E
BrandBroadcom
HK$33.578
Each (On a Reel of 1000)
units
Surface Mount - 5.5V 1 8 SO DC 1.7µs 18.5 mA 5000 Vrms - - - 1.7µs
RS Stock No. 165-2734
Mfr. Part No.VOM452T
BrandVishay
HK$3.512
Each (On a Reel of 2000)
units
Surface Mount Phototransistor 1.8V 1 5 SOP DC 5ns 25 mA 3.75 kVrms Yes 50% - -
RS Stock No. 196-3310
Mfr. Part No.RV1S2211ACCSP-10YV#SC0
HK$5.098
Each (In a Pack of 25)
units
Surface Mount - 1.4V 1 4 - DC 4µs 30 mA 5 kVrms - 400% 100% 5µs
RS Stock No. 124-1742
Mfr. Part No.H11L1SR2VM
HK$3.069
Each (On a Reel of 1000)
units
Surface Mount Logic Gate 1.5V - 6 DIP DC 0.1µs 60 mA 7500 V ac Yes - - 0.1µs
RS Stock No. 174-4118
Mfr. Part No.TLP2310(E(T
BrandToshiba
HK$6.458
Each (In a Pack of 10)
units
Surface Mount Photo IC 1.9V 1 6 SO DC 11ns 8 mA 3750 Vrms - - - 13ns
RS Stock No. 161-1141
Mfr. Part No.6N137VSMT&R
BrandIsocom
HK$5.597
Each (In a Pack of 10)
units
Surface Mount - 1.8V 1 8 SMD AC 40ns 50 mA 5000 (Minimum) Vrms Yes - - 10ns
RS Stock No. 178-3246
Mfr. Part No.ACPL-W484-000E
BrandBroadcom
HK$18.684
Each (In a Tube of 100)
units
Surface Mount IGBT Gate Drive, MOSFET 1.85V 1 6 SOIC DC 6ns 10 mA 5 kVrms Yes - - 6ns
RS Stock No. 864-9072
Mfr. Part No.FOD2741ASV
HK$11.103
Each (In a Pack of 10)
units
Surface Mount Phototransistor 1.5V 1 8 DIP DC - 20 mA 5000 Vrms - 200% - -
RS Stock No. 693-5943
Mfr. Part No.ACPL-844-300E
BrandBroadcom
HK$14.56
Each
units
Surface Mount Phototransistor 1.4V 4 16 PDIP AC 4µs 50 mA 5 kVrms - 300% 20 % 3µs
RS Stock No. 166-3636
Mfr. Part No.MOC3043SM
HK$3.121
Each (In a Bag of 1000)
units
Surface Mount Phototriac 1.5V 1 6 DIP AC - 60 mA 7.5 kVrms Yes - - -
RS Stock No. 885-1124
Mfr. Part No.TLP292(V4-GRTL,E(T
BrandToshiba
HK$3.45
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO4 AC, DC 2µs ±50 mA 3750 Vrms - 300% - 3µs
RS Stock No. 146-3362
Mfr. Part No.FODM217A
HK$2.276
Each (In a Tube of 100)
units
Surface Mount Phototransistor 1.4V 1 4 SOP DC 2µs 200 mA Minimum of 3750 Vrms ac Yes 160% 80% 3µs
RS Stock No. 165-6276
Mfr. Part No.ILD256T
BrandVishay
HK$5.511
Each (On a Reel of 2000)
units
Surface Mount Phototransistor 1.55V 2 8 SOIC AC - 30 mA 4 kVrms - 20% - -
RS Stock No. 171-2954
Mfr. Part No.4N35SM
BrandIsocom
HK$2.185
Each (In a Tube of 65)
units
Surface Mount Transistor 1.5V 1 6 SMD DC 2µs 60 (Forward) mA 5.3 kVrms, 7500 V Pk - - 100% 2µs
RS Stock No. 196-3296
Mfr. Part No.RV1S9260ACCSP-10YV#SC0
HK$19.828
Each (In a Pack of 5)
units
Surface Mount - 1.7V 1 5 - DC 5µs 20 mA 5 kVrms Yes - - 5ns
RS Stock No. 691-2145
Mfr. Part No.LTV-817-B
BrandLite-On
HK$2.122
Each (In a Pack of 10)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 260% 130 % 3µs
RS Stock No. 818-8350
Mfr. Part No.HCPL-3700-300E
BrandBroadcom
HK$34.57
Each (In a Pack of 2)
units
Surface Mount CMOS 0.59V 1 8 DIP AC, DC 20µs 4.4 mA 3750 Vrms Yes - - 0.3µs