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. 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. 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. 547-3879
Mfr. Part No.HCPL-2531-000E
BrandBroadcom
€2.53
Each
units
Through Hole Transistor 1.7V 2 8 PDIP DC - 25 mA 5 kVrms Yes 50% 19 % -
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. 632-4857
Mfr. Part No.PS2502-4-A
€2.97
Each
units
Through Hole Darlington 1.4V 4 16 PDIP DC 100µs 80 mA 5000 Vrms - 2000% 200 % 100µs
RS Stock No. 597-302
Mfr. Part No.4N35
BrandIsocom
€0.52
Each
units
Through Hole Transistor 1.5V 1 6 PDIP DC 2µs 60 mA 5.3 kVrms - - 40 % 2µs
RS Stock No. 840-0004
Mfr. Part No.HCPL-2231-000E
BrandBroadcom
€5.42
Each
units
Through Hole Logic Gate 1.85V 2 8 DIP - 30ns 230 mA 3750 Vrms Yes - - 7ns
RS Stock No. 806-4169
Mfr. Part No.MID400SD
€3.635
Each (In a Pack of 2)
units
Surface Mount Logic Gate 1.5V 2 8 MDIP AC, DC 1ms - 2500 Vrms Yes - - 1ms
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. 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. 691-2306
Mfr. Part No.MOC3063
BrandLite-On
€0.454
Each (In a Pack of 5)
units
Through Hole Triac - 1 6 PDIP - - 50 mA 5 kVrms - - - -
RS Stock No. 178-4755
Mfr. Part No.MOC3021M
€0.365
Each (In a Tube of 50)
units
Through Hole Triac 1.5V 1 6 DIP DC - 60 mA 7.5 kVrms Yes - - -
RS Stock No. 178-3156
Mfr. Part No.HCPL-2531-000E
BrandBroadcom
€1.58
Each (In a Tube of 50)
units
Through Hole Transistor 1.7V 2 8 PDIP DC - 25 mA 5 kVrms Yes 50% 19 % -
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. 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. 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. 165-2712
Mfr. Part No.VOL617A-2X001T
BrandVishay
€0.189
Each (On a Reel of 3000)
units
Surface Mount Phototransistor 1.5V 1 4 LSOP DC 3.5µs 60 mA 5 kVrms - 125% - 5µs
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. 169-6099
Mfr. Part No.VO208AT
BrandVishay
€0.182
Each (On a Reel of 2000)
units
Surface Mount Phototransistor 1.5V 1 8 SOIC DC 3µs 60 mA 4 kVrms - 320% 160 % 2µs
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 - - -
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