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. 693-5943
Mfr. Part No.ACPL-844-300E
BrandBroadcom
$2.44
Each
units
Surface Mount Phototransistor 1.4V 4 16 PDIP AC 4µs 50 mA 5 kVrms - 300% 20 % 3µs
RS Stock No. 178-3123
Mfr. Part No.ACPL-844-300E
BrandBroadcom
$1.76
Each (In a Tube of 25)
units
Surface Mount Phototransistor 1.4V 4 16 PDIP AC 4µs 50 mA 5 kVrms - 300% 20 % 3µs
RS Stock No. 178-3205
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
$3.03
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 922-4810
Mfr. Part No.HCPL-3120-000E
BrandBroadcom
$4.084
Each (In a Pack of 5)
units
- - 1.8V - - - - - 16 mA 3750 Vrms - - - -
RS Stock No. 693-5264
Mfr. Part No.HCNR200-300E
BrandBroadcom
$5.54
Each
units
Surface Mount Photodiode 1.95V 1 8 PDIP-W DC - 25 mA 5 kVrms - - - -
RS Stock No. 922-6582
Mfr. Part No.HCNR200-300E
BrandBroadcom
$3.848
Each (In a Tube of 42)
units
Surface Mount Photodiode 1.95V 1 8 PDIP-W DC - 25 mA 5000 V ac - - - -
RS Stock No. 178-1570
Mfr. Part No.ACPL-244-500E
BrandBroadcom
$1.43
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. 693-6794
Mfr. Part No.ACPL-244-500E
BrandBroadcom
$2.572
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. 547-4181
Mfr. Part No.HCPL-316J-000E
BrandBroadcom
$9.05
Each
units
Surface Mount BiCMOS/DMOS - - 16 SOIC - 0.1µs - 3.75 kVrms Yes - - -
RS Stock No. 922-5851
Mfr. Part No.HCPL-316J-000E
BrandBroadcom
$5.653
Each (In a Tube of 45)
units
Surface Mount BiCMOS/DMOS - - 16 SOIC - 0.1µs - 3750 V ac Yes - - -
RS Stock No. 922-5829
Mfr. Part No.HCPL-3700-000E
BrandBroadcom
$3.787
Each (In a Tube of 50)
units
Through Hole Darlington - 1 8 PDIP AC, DC 20 μ 50 mA 3750 V ac Yes - - 0.3µs
RS Stock No. 547-4030
Mfr. Part No.HCPL-3700-000E
BrandBroadcom
$5.83
Each
units
Through Hole Darlington - 1 8 PDIP AC, DC 20µs 50 mA 3.75 kVrms Yes - - 0.3µs
RS Stock No. 693-5924
Mfr. Part No.ACPL-333J-000E
BrandBroadcom
$9.05
Each
units
Surface Mount IGBT Gate Drive - - 16 SOIC - - - 3.75 kVrms Yes - - -
RS Stock No. 922-5860
Mfr. Part No.HCPL-7800-000E
BrandBroadcom
$11.73
Each (In a Tube of 50)
units
Through Hole Transistor - 1 8 PDIP - 4.3µs - 3750 V ac Yes - - -
RS Stock No. 178-3250
Mfr. Part No.ACPL-P346-000E
BrandBroadcom
$3.55
Each (In a Tube of 100)
units
Surface Mount IGBT Gate Drive, MOSFET 1.95V 1 6 SO - 30ns 25 mA 3.75 kVrms Yes - - 30ns
RS Stock No. 922-6614
Mfr. Part No.ACPL-333J-000E
BrandBroadcom
$6.77
Each (In a Tube of 45)
units
Surface Mount IGBT Gate Drive - - 16 SOIC - - - 3750 V ac Yes - - -
RS Stock No. 547-4197
Mfr. Part No.HCPL-7800-000E
BrandBroadcom
$13.44
Each
units
Through Hole Transistor - 1 8 PDIP - 4.3µs - 3.75 kVrms Yes - - -
RS Stock No. 922-5633
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
$2.571
Each (In a Tube of 50)
units
Surface Mount Transistor 1.8V 1 8 DIP DC 0.1µs 16 mA 3750 V ac Yes - - 0.1µs
RS Stock No. 830-4997
Mfr. Part No.ACPL-P346-000E
BrandBroadcom
$5.28
Each (In a Pack of 2)
units
Surface Mount IGBT Gate Drive, MOSFET 1.95V 1 6 SO - 30ns 25 mA 3750 Vrms Yes - - 30ns
RS Stock No. 450-812
Mfr. Part No.HCPL-3120-300E
BrandBroadcom
$4.40
Each (In a Pack of 2)
units
Surface Mount Transistor 1.8V 1 8 DIP DC 0.1µs 16 mA 3.75 kVrms Yes - - 0.1µs