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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Omschrijving Prijs 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-stocknr. 395-6344
FabrikantnummerK1010 B
FabrikantCosmo
€ 0,238
Each (In a Pack of 10)
Aantal stuks
Through Hole Transistor 1.4V - 4 DIP - 5µs 50 mA 5 kVrms - 260% 60 % 4µs
RS-stocknr. 173-2229
FabrikantnummerK1010 B
FabrikantCosmo
€ 0,19
Each (On a Reel of 2000)
Aantal stuks
Through Hole Transistor 1.4V - 4 DIP - 5µs 50 mA 5 kVrms - 260% 60 % 4µs
RS-stocknr. 395-6293
FabrikantnummerKPC357NT0B
FabrikantCosmo
€ 0,286
Each (In a Pack of 10)
Aantal stuks
Surface Mount Transistor 1.4V - 4 DIP - 5µs 50 mA 3.75 kVrms - 260% 130 % 4µs
RS-stocknr. 395-6338
FabrikantnummerKM0C3022
FabrikantCosmo
€ 0,905
Each (In a Pack of 10)
Aantal stuks
Through Hole Phototriac 1.5V - 6 DIP - - 50 mA 5 kVrms - - - -
RS-stocknr. 169-8133
FabrikantnummerKPC357NT0B
FabrikantCosmo
€ 0,266
Each (On a Reel of 3000)
Aantal stuks
Surface Mount Transistor 1.4V - 4 DIP - 5µs 50 mA 3.75 kVrms - 260% 130 % 4µs