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. 625-7909
Mfr. Part No.6N137(F)
BrandToshiba
$2.13
Each
units
Through Hole Transistor 1.75V 1 8 DIP DC 30ns 20 mA 2.5 kVrms Yes 1000% 1000 % 30ns
RS Stock No. 168-7830
Mfr. Part No.TLP293(E
BrandToshiba
$0.28
Each (On a Tape of 175)
units
Surface Mount Transistor 1.4V 1 4 SOIC DC 2µs 50 mA 3.75 kVrms - 600% - 3µs
RS Stock No. 885-1027
Mfr. Part No.TLP293(E(T
BrandToshiba
$0.371
Each (In a Pack of 25)
units
Surface Mount Phototransistor 1.4V 1 4 SO4 DC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 756-3400
Mfr. Part No.TLP131(GR-TPR,F)
BrandToshiba
$0.624
Each (In a Pack of 5)
units
Surface Mount Phototransistor 1.3V 1 6 MFSOP6 DC 2ns 25 mA 3750 V ac - 300% 50 % 3ns
RS Stock No. 796-5308
Mfr. Part No.TLP293(E
BrandToshiba
$0.30
Each (In a Pack of 25)
units
Surface Mount Transistor 1.4V 1 4 SOIC DC 2µs 50 mA 3750 Vrms - 600% - 3µs
RS Stock No. 756-3514
Mfr. Part No.TLP548J(F)
BrandToshiba
$3.35
Each
units
Through Hole Photothyristor 1.3V 1 6 DIP DC - 25 mA 2500 V ac - - - -
RS Stock No. 168-7596
Mfr. Part No.TLP3052(S,C,F)
BrandToshiba
$0.851
Each (In a Tube of 50)
units
Through Hole Triac 1.3V 1 5 PDIP DC - 50 mA 5 kVrms - - - -
RS Stock No. 769-0290
Mfr. Part No.TLP3052(S,C,F)
BrandToshiba
$1.664
Each (In a Pack of 5)
units
Through Hole Triac 1.3V 1 5 PDIP DC - 50 mA 5000 Vrms - - - -
RS Stock No. 207-579
Mfr. Part No.TLP222A-2(F)
BrandToshiba
$3.08
Each (In a Pack of 5)
units
Through Hole MOSFET - - 8 PDIP DC - 50 mA 2.5 kVrms - - - -
RS Stock No. 885-1424
Mfr. Part No.TLP175A(E(T
BrandToshiba
$1.327
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 799-5330
Mfr. Part No.TLP523(F)
BrandToshiba
$1.102
Each (In a Pack of 10)
units
Through Hole Darlington 1.3V 1 4 DIP DC - - 2500 Vrms - 2000% - -
RS Stock No. 168-7808
Mfr. Part No.TLP175A
BrandToshiba
$1.29
Each (In a Tube of 125)
units
Surface Mount MOSFET 1.4V 1 4 SOIC AC 1ms 80 mA 3.75 kVrms - - - 1ms
RS Stock No. 796-5213
Mfr. Part No.TLP175A
BrandToshiba
$1.664
Each (In a Pack of 5)
units
Surface Mount MOSFET 1.4V 1 4 SOIC AC 1ms 80 mA 3750 Vrms - - - 1ms
RS Stock No. 896-2565
Mfr. Part No.TLP523(F)
BrandToshiba
$0.629
Each (In a Pack of 10)
units
Through Hole Darlington 1.3V 1 4 DIP DC - - 2500 Vrms - 2000% - -
RS Stock No. 186-022
Mfr. Part No.TLP350(F)
BrandToshiba
$3.595
Each (In a Pack of 2)
units
Through Hole IGBT Gate Drive, MOSFET - 1 8 PDIP DC - - 3.75 kVrms Yes - - -
RS Stock No. 760-3221
Mfr. Part No.TLP350(TP5,F)
BrandToshiba
$2.71
Each
units
Surface Mount IGBT Gate Drive, MOSFET 1.8V 2 8 PDIP DC 15ns 20 mA 3750 V ac - - - 8ns
RS Stock No. 799-5295
Mfr. Part No.TLP240D(F(O
BrandToshiba
$1.93
Each (In a Pack of 2)
units
Through Hole MOSFET 1.4V 1 4 DIP AC - 30 mA 5000 Vrms - - - -
RS Stock No. 542-6047
Mfr. Part No.TLP227G(F)
BrandToshiba
$1.958
Each (In a Pack of 5)
units
Through Hole MOSFET - 1 4 PDIP DC - 50 mA 2.5 kVrms - - - -
RS Stock No. 896-2521
Mfr. Part No.TLP240D(F(O
BrandToshiba
$2.19
Each (In a Pack of 2)
units
Through Hole MOSFET 1.4V 1 4 DIP AC - 30 mA 5000 Vrms - - - -
RS Stock No. 168-7424
Mfr. Part No.TLP350(TP5,F)
BrandToshiba
$3.481
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