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. 708-5402
Mfr. Part No.ILQ621
BrandVishay
€2.996
Each (In a Pack of 5)
units
Through Hole Transistor 1.3V 4 16 PDIP DC 2.8µs 60 mA 5300 V ac - 600% 50 % 11µs
RS Stock No. 168-9664
Mfr. Part No.LTV-817-B
BrandLite-On
€0.144
Each (In a Tube of 100)
units
Through Hole Transistor 1.4V 1 4 PDIP DC 4µs 50 mA 5 kVrms - 260% 130 % 3µs
RS Stock No. 166-2128
Mfr. Part No.MID400S
€1.455
Each (In a Bag of 1000)
units
Surface Mount Logic Gate 1.5V 2 8 MDIP AC, DC 1ms - 2.5 kVrms Yes - - 1ms
RS Stock No. 691-2088
Mfr. Part No.LTV-357T
BrandLite-On
€0.194
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. 739-0240
Mfr. Part No.MOC3021M
€0.486
Each (In a Pack of 5)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7500 V ac Yes - - -
RS Stock No. 168-7818
Mfr. Part No.TLP290(GB
BrandToshiba
€0.127
Each (On a Tape of 175)
units
Surface Mount Transistor 1.4V 1 4 SOIC AC 4µs 50 mA 3.75 kVrms - 400% - 7µs
RS Stock No. 168-8528
Mfr. Part No.4N25
BrandIsocom
€0.365
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. 885-1266
Mfr. Part No.TLP352F(D4,F)
BrandToshiba
€1.794
Each (In a Pack of 5)
units
Through Hole Photo IC 1.7V 1 8 DIP - 15ns 3 mA 3750 Vrms Yes - - 8ns
RS Stock No. 166-2052
Mfr. Part No.MID400SD
€1.632
Each (On a Reel of 1000)
units
Surface Mount Logic Gate 1.5V 2 8 MDIP AC, DC 1ms - 2.5 kVrms Yes - - 1ms
RS Stock No. 597-289
Mfr. Part No.4N25
BrandIsocom
€0.52
Each
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 20 % 2µs
RS Stock No. 913-4815
Mfr. Part No.PVG612ASPBF
BrandInfineon
€7.685
Each (In a Tube of 50)
units
Surface Mount MOSFET - 1 6 DIP - 3.5ms 25 mA 4000 Vrms - - - 0.5ms
RS Stock No. 693-5274
Mfr. Part No.HCPL-2631-300E
BrandBroadcom
€2.88
Each
units
Surface Mount Transistor 1.75V 2 8 DIP DC 24ns 20 mA 3.75 kVrms Yes 70% 70 % 10ns
RS Stock No. 885-1077
Mfr. Part No.TLP290(GB,SE(T
BrandToshiba
€0.237
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO4 AC, DC 4 μ ±50 mA 3750 Vrms - 400% - 7µs
RS Stock No. 450-761
Mfr. Part No.HCNW2611-300E
BrandBroadcom
€3.01
Each (In a Pack of 2)
units
Surface Mount Transistor 1.75V 1 8 DIP DC 24ns 20 mA 3.75 kVrms Yes - - 10ns
RS Stock No. 862-9381
Mfr. Part No.MID400S
€1.496
Each (In a Pack of 5)
units
Surface Mount Open Collector 1.5V 1 8 DIP AC 1ms - 2.5 kVrms Yes - - 1ms
RS Stock No. 699-8372
Mfr. Part No.VO208AT
BrandVishay
€0.41
Each (In a Pack of 10)
units
Surface Mount Phototransistor 1.5V 1 8 SOIC DC 3µs 60 mA 4000 V ac - 320% 160 % 2µs
RS Stock No. 922-5627
Mfr. Part No.HCNW2611-300E
BrandBroadcom
€1.836
Each (In a Tube of 42)
units
Surface Mount Transistor 1.75V 1 8 DIP DC 24ns 20 mA 3750 V ac Yes - - 10ns
RS Stock No. 173-2645
Mfr. Part No.LTV-357T
BrandLite-On
€0.109
Each (On a Reel of 3000)
units
Surface Mount Transistor 1.4V 1 4 Mini-Flat DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 168-6126
Mfr. Part No.PS2502-4-A
€2.625
Each (In a Tube of 20)
units
Through Hole Darlington 1.4V 4 16 PDIP DC 100µs 80 mA 5 kVrms - 2000% 200 % 100µs
RS Stock No. 773-0196
Mfr. Part No.VOL617A-2X001T
BrandVishay
€0.12
Each (In a Bag of 10)
units
Surface Mount Phototransistor 1.5V 1 4 LSOP DC 3.5µs 60 mA 5000 Vrms - 125% - 5µs
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