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. 708-5323
Mfr. Part No.CNY17F-2
BrandVishay
MYR1.72
Each (In a Pack of 10)
units
Through Hole Phototransistor 1.65V 1 6 PDIP DC 3µs 60 mA 5300 V ac - 125% 63 % 14µs
RS Stock No. 127-8463
Mfr. Part No.LTV-817S-TA1
BrandLite-On
MYR0.81
Each (In a Pack of 50)
units
Surface Mount Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5000 Vrms - 600% - 3µs
RS Stock No. 171-2964
Mfr. Part No.H11L1 V2
BrandIsocom
MYR2.191
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. 127-8462
Mfr. Part No.LTV-817S-TA
BrandLite-On
MYR0.81
Each (In a Pack of 50)
units
Surface Mount Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5000 Vrms - 600% - 3µs
RS Stock No. 903-4282
Mfr. Part No.HCPL3700
MYR13.70
Each (In a Pack of 5)
units
Surface Mount Photodarlington 0.65V 1 8 PDIP AC, DC 45µs 4.4 mA - - - - 0.5µs
RS Stock No. 769-0284
Mfr. Part No.TLP3041(S,C,F)
BrandToshiba
MYR3.518
Each (In a Pack of 5)
units
Through Hole Triac 1.3V 1 5 PDIP DC - 50 mA 5000 Vrms - - - -
RS Stock No. 124-1743
Mfr. Part No.MOC207R2M
MYR1.021
Each (On a Reel of 2500)
units
Surface Mount Transistor 1.5V 1 8 SOIC DC 3.2µs 60 mA 2500 V ac - 200% 100 % 4.7µs
RS Stock No. 168-7424
Mfr. Part No.TLP350(TP5,F)
BrandToshiba
MYR10.593
Each (In a Tube of 50)
units
Surface Mount IGBT Gate Drive, MOSFET 1.8V 2 8 PDIP DC 15ns 20 mA 3.75 kVrms - - - 8ns
RS Stock No. 807-6648
Mfr. Part No.HCPL0701R2
MYR7.24
Each (In a Pack of 5)
units
Surface Mount Darlington 1.7V 1 8 MDIP DC - 20 mA 2500 Vrms Yes 5000% - -
RS Stock No. 166-2137
Mfr. Part No.HCPL0701R2
MYR4.526
Each (On a Reel of 2500)
units
Surface Mount Darlington 1.7V 1 8 MDIP DC - 20 mA 2.5 kVrms Yes 5000% - -
RS Stock No. 145-4282
Mfr. Part No.CNY173M
MYR0.819
Each (In a Bag of 1000)
units
Through Hole Transistor 1.65V 1 6 PDIP DC - 60 mA 7.5 kVrms - 200% 100 % -
RS Stock No. 691-2088
Mfr. Part No.LTV-357T
BrandLite-On
MYR0.922
Each (In a Pack of 10)
units
Surface Mount Transistor 1.4V 1 4 Mini-Flat DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 165-2938
Mfr. Part No.VOM617A-4X001T
BrandVishay
MYR0.83
Each (On a Reel of 3000)
units
Surface Mount Phototransistor 1.6V 1 4 SOP DC 7µs 60 mA 3.75 kVrms - 320% - 12µs
RS Stock No. 597-302
Mfr. Part No.4N35
BrandIsocom
MYR3.38
Each
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 40 % 2µs
RS Stock No. 170-2388
Mfr. Part No.PC457L0NIP0F
BrandSharp
MYR3.57
Each (On a Reel of 3000)
units
Surface Mount Transistor 1.95V 1 5 Mini-Flat DC - 25 mA 3.75 kVrms - 50% 19 % -
RS Stock No. 805-1267
Mfr. Part No.6N137M
MYR5.662
Each (In a Pack of 5)
units
Through Hole Logic Gate 1.8V 1 8 MDIP DC 30ns 50 mA 5000 Vrms Yes - - 10ns
RS Stock No. 708-5285
Mfr. Part No.4N33
BrandVishay
MYR1.52
Each (In a Pack of 10)
units
Through Hole Darlington 1.5V 1 6 PDIP DC - 60 mA 5300 V ac - - 500 % -
RS Stock No. 922-6598
Mfr. Part No.HCPL-354-000E
BrandBroadcom
MYR0.883
Each (On a Reel of 3000)
units
Surface Mount Transistor 1.4V 1 4 Mini-Flat AC 4 μ 50 mA 3750 V ac - 400% 20% 3µs
RS Stock No. 799-5249
Mfr. Part No.TLP183(GB,E(T
BrandToshiba
MYR1.515
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO6 DC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 760-3221
Mfr. Part No.TLP350(TP5,F)
BrandToshiba
MYR16.65
Each
units
Surface Mount IGBT Gate Drive, MOSFET 1.8V 2 8 PDIP DC 15ns 20 mA 3750 V ac - - - 8ns