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. 178-3130
Mfr. Part No.HCNW4504-300E
BrandBroadcom
MYR9.419
Each (In a Tube of 42)
units
Surface Mount Phototransistor 1.95V 1 8 DIP DC - 400 mA 5 kVrms Yes 68% - -
RS Stock No. 168-9667
Mfr. Part No.LTV-817-C
BrandLite-On
MYR0.762
Each (In a Tube of 100)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 400% 200 % 3µs
RS Stock No. 178-1595
Mfr. Part No.ACPL-227-50BE
BrandBroadcom
MYR1.77
Each (On a Reel of 2000)
units
- - - - - - - - - - - - - -
RS Stock No. 124-1738
Mfr. Part No.HCPL2630
MYR9.156
Each (In a Tube of 50)
units
Through Hole Logic Gate 1.8V 1 8 DIP DC 50ns 50 mA 2500 V ac Yes - - 12ns
RS Stock No. 453-1722
Mfr. Part No.H11L1
BrandIsocom
MYR3.131
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. 699-8357
Mfr. Part No.TCMT4100
BrandVishay
MYR9.325
Each (In a Pack of 2)
units
Surface Mount Transistor 1.6V 4 16 Mini-Flat DC 3µs 60 mA 3750 V ac - 600% 50 % 4.7µs
RS Stock No. 168-9510
Mfr. Part No.LTV-817S-TA
BrandLite-On
MYR0.543
Each (On a Reel of 1000)
units
Surface Mount Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 600% - 3µs
RS Stock No. 178-1570
Mfr. Part No.ACPL-244-500E
BrandBroadcom
MYR4.228
Each (On a Reel of 2000)
units
Surface Mount Transistor 1.4V 4 16 SOIC AC 2µs 50 mA 3 kVrms - 400% 20 % 3µs
RS Stock No. 178-0898
Mfr. Part No.CNY17F-2
BrandVishay
MYR1.505
Each (In a Tube of 65)
units
Through Hole Phototransistor 1.65V 1 6 PDIP DC 3µs 60 mA 5.3 kVrms - 125% 63 % 14µs
RS Stock No. 708-5323
Mfr. Part No.CNY17F-2
BrandVishay
MYR1.538
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
MYR0.867
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. 693-6794
Mfr. Part No.ACPL-244-500E
BrandBroadcom
MYR9.156
Each (In a Pack of 5)
units
Surface Mount Transistor 1.4V 4 16 SOIC AC 2µs 50 mA 3 kVrms - 400% 20 % 3µs
RS Stock No. 171-2964
Mfr. Part No.H11L1 V2
BrandIsocom
MYR2.244
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. 178-7025
Mfr. Part No.LTV-817S
BrandLite-On
MYR0.762
Each (In a Tube of 100)
units
Surface Mount Transistor 1.4V 1 4 SMD DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 919-0076
Mfr. Part No.CNY17-3
BrandVishay
MYR1.397
Each (In a Tube of 50)
units
Through Hole Transistor 1.65V 1 6 DIP DC 3µs 60 mA 5 kVrms - 200% - 14µs
RS Stock No. 100-0150
Mfr. Part No.TLP127(U,F)
BrandToshiba
MYR6.365
Each (In a Pack of 25)
units
Surface Mount Darlington 1.3V 1 4 SOP DC 40µs 50 mA 2500 V ac - 4000% 1000 % 15µs
RS Stock No. 453-7528
Mfr. Part No.PS2501L-1
MYR4.00
Each
units
Surface Mount Transistor 1.4V 1 4 SMT DC 3µs 80 mA 5000 Vrms - 600% 80 % 5µs
RS Stock No. 168-9685
Mfr. Part No.MOC3022
BrandLite-On
MYR1.575
Each (In a Tube of 65)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 691-2271
Mfr. Part No.MOC3022
BrandLite-On
MYR2.236
Each (In a Pack of 5)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 799-5249
Mfr. Part No.TLP183(GB,E(T
BrandToshiba
MYR1.576
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO6 DC 2µs 50 mA 3750 Vrms - 600% - 3µs