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. 691-2209
Mfr. Part No.LTV-827S-TA1
BrandLite-On
$0.594
Each (In a Pack of 5)
units
Surface Mount Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 168-9672
Mfr. Part No.LTV-826
BrandLite-On
$0.561
Each (In a Tube of 50)
units
Through Hole Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 125-7579
Mfr. Part No.LTV-827S
BrandLite-On
$0.507
Each (In a Tube of 50)
units
Surface Mount - 1.4V 2 8 PDIP DC - 50 mA 5000 Vrms - - - -
RS Stock No. 168-9674
Mfr. Part No.LTV-827S-TA1
BrandLite-On
$0.307
Each (On a Reel of 1000)
units
Surface Mount Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 171-2981
Mfr. Part No.MOC3043X V2
BrandIsocom
$0.80
Each (In a Tube of 65)
units
Through Hole Phototriac 1.4V 1 6 DIP - - 50 (Forward) mA 5.3 kVrms, 7500 V Pk - - - -
RS Stock No. 691-2202
Mfr. Part No.LTV-826
BrandLite-On
$0.694
Each (In a Pack of 5)
units
Through Hole Transistor 1.4V 2 8 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 166-1859
Mfr. Part No.FOD0721
$5.317
Each (In a Tube of 50)
units
Surface Mount Logic Gate 6.5V - 8 SOIC DC 5ns 10 μA 3.75 kVrms Yes - - 4.8ns
RS Stock No. 806-6042
Mfr. Part No.MOC3043TVM
$1.687
Each (In a Pack of 10)
units
Through Hole Triac 1.5V 1 6 DIP AC - 60 mA 7500 V ac Yes - - -
RS Stock No. 169-8585
Mfr. Part No.FOD817A
$0.193
Each (In a Bag of 2000)
units
Through Hole Phototransistor 1.4V 1 4 DIP DC 4µs 50 mA 5 kVrms - 160% - 3µs
RS Stock No. 896-2549
Mfr. Part No.TLP2630(F)
BrandToshiba
$4.33
Each (In a Pack of 2)
units
Through Hole IC 1.75V 1 8 DIP AC 30ns 5 mA 2500 Vrms Yes - - 30ns
RS Stock No. 625-8413
Mfr. Part No.TLP251(F)
BrandToshiba
$4.29
Each
units
Through Hole Buffer, Totem-Pole 1.8V 1 8 PDIP DC - 10 mA 2.5 kVrms Yes - - -
RS Stock No. 805-1182
Mfr. Part No.4N29SM
$1.177
Each (In a Pack of 25)
units
Surface Mount Darlington 1.5V 1 6 DIP DC 5µs 3 A 7500 Vrms Yes 100% - 40µs
RS Stock No. 166-3059
Mfr. Part No.4N29SM
$0.606
Each (In a Bag of 1000)
units
Surface Mount Darlington 1.5V 1 6 DIP DC 5µs 3 A 7.5 kVrms Yes 100% - 40µs
RS Stock No. 178-3205
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
$3.508
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 168-9695
Mfr. Part No.6N137-L
BrandLite-On
$1.572
Each (In a Tube of 50)
units
Through Hole Transistor 1.7V 1 8 DIP DC 20ns 15 mA 5 kVrms Yes - - 6.6ns
RS Stock No. 691-2233
Mfr. Part No.LTV-847
BrandLite-On
$1.42
Each (In a Pack of 2)
units
Through Hole Transistor 1.4V 4 16 PDIP DC 4µs 50 mA 5 kVrms - 600% 50 % 3µs
RS Stock No. 691-2325
Mfr. Part No.6N137-L
BrandLite-On
$2.214
Each (In a Pack of 5)
units
Through Hole Transistor 1.7V 1 8 DIP DC 20ns 15 mA 5 kVrms Yes - - 6.6ns
RS Stock No. 760-3202
Mfr. Part No.TLP2531(F)
BrandToshiba
$2.72
Each (In a Pack of 5)
units
Through Hole Transistor 1.7V 2 8 DIP DC 0.3µs 25 mA 2500 V ac Yes 30% 19 % 0.3µs
RS Stock No. 761-4439
Mfr. Part No.FOD817A
$0.473
Each (In a Pack of 10)
units
Through Hole Phototransistor 1.4V 1 4 DIP DC 4µs 50 mA 5000 V ac - 160% - 3µs
RS Stock No. 799-5315
Mfr. Part No.TLP2630(F)
BrandToshiba
$4.33
Each (In a Pack of 2)
units
Through Hole Transistor 1.75V 1 8 DIP AC 30ns 5 mA 2500 Vrms Yes - - 30ns
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