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Optocoupler

Optocouplers, also known as optoisolators or photocouplers, are essential semiconductor devices that provide electrical isolation between input and output circuits while allowing signal transmission via light. These components typically consist of an infrared LED and a photodetector (such as a phototransistor, photodarlington, or photo-SCR) encl...

Optocouplers, also known as optoisolators or photocouplers, are essential semiconductor devices that provide electrical isolation between input and output circuits while allowing signal transmission via light. These components typically consist of an infrared LED and a photodetector (such as a phototransistor, photodarlington, or photo-SCR) enclosed in a single package. Key technical parameters include isolation voltage (e.g., 3750 Vrms to 5000 Vrms), current transfer ratio (CTR), collector-emitter voltage (Vceo), and switching speed. Common package types include DIP, SOP, and SMD, with through-hole and surface-mount options available for diverse PCB layouts.

Optocouplers are widely deployed in industrial automation, power electronics, and control systems to protect sensitive logic circuits from high-voltage transients and ground loops. Typical applications include PLC input/output modules, motor drives, switching power supplies, relay drivers, and communication interfaces like RS-232 and I2C. They are also critical in medical equipment, renewable energy inverters, and automotive electronics where galvanic isolation is mandatory for safety and noise immunity.

Our catalog includes subcategories such as standard phototransistor optocouplers (e.g., PC817, 4N35), high-speed optocouplers (e.g., 6N137, HCPL-2601), and Darlington pair optocouplers (e.g., TLP127). Part numbers often follow manufacturer codes like "PC817" for Sharp or "4N35" for Vishay, with suffixes indicating package type (e.g., "-D" for DIP). We also stock zero-crossing and random-phase optocouplers for AC switching applications.

At Electric Automation Network, we offer real-time pricing, express worldwide shipping, and personalized technical support from our team of electrical engineers. Each product includes detailed datasheets and application notes to simplify your design process. Whether you need a standard optocoupler for a prototype or bulk quantities for production, we ensure fast delivery and expert guidance.

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Manufacturer Code Reference Catalog Number Description Delivery Price

2982139

OPT-5DC/230AC/ 1

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Miniature solid-state relay

Plug-in miniature solid-state relay, power solid-state relay, 1 closing contact, input: 5 V DC, output: 24-253 V AC/ 0.75 A

Plug-in miniature solid-state relay, power solid-state relay, 1 N/O contact, input: 5 V DC, output: 24 - 253 V AC/0.75 A

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2964254

DEK-OE-24DC/ 48DC/100/T

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Solid-state relay terminal block

Input solid-state relay terminal, input: 24 V DC, output: 3 - 48 V DC/100 mA, with interrupt plug on output, terminal width 6.2 mm

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2905491

ST-OV2-24DC/ 24DC/5

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Solid-state relays

Pluggable solid-state power relay, with indicator light and protection circuit in input and output circuit, input: 24 V DC, output: 3-30 V DC/max. 5 A, pluggable to base terminal blocks

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2905187

ST-OV3-12DC/ 24DC/2

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Solid-state relays

Pluggable solid-state power relay, with indicator light and protection circuit in input and output circuit, input: 12 V DC, output: short circuit resistance, 10-30 V DC/max. 2 A, pluggable to base terminal blocks

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2904586

PLC-OPT-125DC/ 48DC/100

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Solid-state relay module

PLC-INTERFACE, consisting of PLC-BPT.../21 base terminal block with push-in connection and plug-in miniature solid-state relay, for installation on NS 35/7.5 rail, 1 closing contact, input: 125 V DC, output: 3-48 V DC/100 mA

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2911058

ST-OE3-24DC/ 48DC/100

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Solid-state relays

Pluggable solid-state input relay, with indicator light and protection circuit protection circuit in input and output circuit, input: 24 V DC, output: 8 - 48 V DC/max. 100 mA, pluggable to base terminal blocks

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2905051

ST-OV2-110DC/ 60DC/1

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Solid-state relays

Pluggable solid-state power relay, with indicator light and protection circuit in input and output circuit, input: 110 V DC, output: 12-60 V DC/max. 1 A, pluggable to base terminal blocks

Plug-in power solid-state relay, with LED and protective circuit in input and output circuits, input: 110 V DC, output: 12 - 60 V DC/max. 1 A, can be plugged into basic terminal blocks

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2911692

ST-OE2-24DC/ 48DC/100

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Solid-state relays

Pluggable solid-state input relay, with indicator light and protection circuit protection circuit in input and output circuit, input: 24 V DC, output: 8 - 48 V DC/max. 100 mA, pluggable to base terminal blocks

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2943437

EMG 12-TR/INV

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Switching amplifier

Inverter module. The inverter module reverses the signals from the ground-connected NPN transistor outputs into positive-connected PNP outputs, as well as the PNP connection signals into NPN connection signals.

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2903228

ST-OV3-24DC/ 60DC/3

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Solid-state relays

Plug-in solid-state power relay, with light indicator and protection circuit in input and output circuit, input: 24 V DC, output: 12-60 V DC/max. 3 A, pluggable to base terminal blocks.

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2980610

PLC-OSC-24DC/ 24DC/ 3RW

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Solid-state relay module

PLC-INTERFACE for railway applications, consisting of screw terminal block and integrated miniature solid-state relay, range: 0.7 x UN to 1.25 x UN, temperature range: -25 °C to +70 °C, 1 closing contact, input: 24 V DC, output: 3-33 V DC/3 A

PLC-INTERFACE for railway applications, consisting of basic terminal block with screw connection and integrated miniature solid-state relay, range: 0.7 x UN to 1.25 x UN, temperature range: -25°C to +70°C, 1 N/O contact, input: 24 V DC, output: 3 - 33 V DC/3 A

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2905035

ST-OV2-24DC/ 60DC/1

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Solid-state relays

Pluggable solid-state power relay, with indicator light and protection circuit in input and output circuit, input: 24 V DC, output: 12-60 V DC/max. 1 A, pluggable to base terminal blocks

Pluggable solid-state power relay, with indicator light and protection circuit in input and output circuit, input: 24 V DC, output: 12-60 V DC/max. 1 A, pluggable to base terminal blocks

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2902965

PLC-OSC-5DC/ 5DC/100KHZ-G

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Solid-state relay module

Eingabe-Solid-State-Relais, mit Gleichspannungsausgang-Gegentakt, Übertragungsfrequenz: 100 kHz, mit Leuchtanzeige und Schutzbeschaltung im Ein- und Ausgangskreis, Eingang: 5 V DC, Ausgang: 4 - 18 V DC/50 mA

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2902966

PLC-OSC-24DC/ 5DC/100KHZ-G

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Solid-state relay module

Eingabe-Solid-State-Relais, mit Gleichspannungsausgang-Gegentakt, Übertragungsfrequenz: 100 kHz, mit Leuchtanzeige und Schutzbeschaltung im Ein- und Ausgangskreis, Eingang: 24 V DC, Ausgang: 4 - 18 V DC/50 mA

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2902967

PLC-OSC-5DC/ 24DC/100KHZ-G

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Solid-state relay module

Eingabe-Solid-State-Relais, mit Gleichspannungsausgang-Gegentakt, Übertragungsfrequent: 100 kHz, with Discharge and Schutzbeschaltung im Ein- und Ausgangskreis, Eingang: 5 V DC, Ausgang: 14 - 30 V DC/50 mA

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2902968

PLC-OSC-24DC/ 24DC/100KHZ-G

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Solid-state relay module

Eingabe-Solid-State-Relais, mit Gleichspannungsausgang-Gegentakt, Übertragungsfrequenz: 100 kHz, mit Leuchtanzeige und Schutzbeschaltung im Ein- und Ausgangskreis, Eingang: 24 V DC, Ausgang: 14 - 30 V DC/50 mA

 		3 View Availability View Price

2902971

PLC-OPT-5DC/ 5DC/100KHZ-G

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Solid-state relay module

Eingabe-Solid-State-Relais, mit Gleichspannungsausgang-Gegentakt, Übertragungsfrequenz: 100 kHz, mit Leuchtanzeige und Schutzbeschaltung im Ein- und Ausgangskreis, Eingang: 5 V DC, Ausgang: 4 - 18 V DC/50 mA

 		3 View Availability View Price

2902972

PLC-OPT-24DC/ 5DC/100KHZ-G

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Solid-state relay module

Eingabe-Solid-State-Relais, mit Gleichspannungsausgang-Gegentakt, Übertragungsfrequenz: 100 kHz, mit Leuchtanzeige und Schutzbeschaltung im Ein- und Ausgangskreis, Eingang: 24 V DC, Ausgang: 4 - 18 V DC/50 mA

 		3 View Availability View Price

2902973

PLC-OPT-5DC/24DC/100KHZ-G

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Solid-state relay module

Eingabe-Solid-State-Relais, mit Gleichspannungsausgang-Gegentakt, Übertragungsfrequent: 100 kHz, with Discharge and Schutzbeschaltung im Ein- und Ausgangskreis, Eingang: 5 V DC, Ausgang: 14 - 30 V DC/50 mA

 		3 View Availability View Price

2902974

PLC-OPT-24DC/24DC/100KHZ-G

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Solid-state relay module

Eingabe-Solid-State-Relais, mit Gleichspannungsausgang-Gegentakt, Übertragungsfrequenz: 100 kHz, mit Leuchtanzeige und Schutzbeschaltung im Ein- und Ausgangskreis, Eingang: 24 V DC, Ausgang: 14 - 30 V DC/50 mA

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2903171

PLC-OSC-LPE-24DC/48DC/100

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Single-channel pulse expansion module, input: 24 V DC, output: 3 - 48 V DC/100 mA, supply: 24 V DC, screw connection

1-channel pulse extension module, input: 24 V DC, output: 3-48 V DC/100 mA, power: 24 V DC, screw connection

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2903173

PLC-OPT-LPE-24DC/48DC/100

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Timer module

1-channel pulse extension module, input: 24 V DC, output: 3-48 V DC/100 mA, power: 24 V DC, push-in connection

 		3 View Availability View Price

2904631

PLC-OSC-24DC/230AC/2.4/ACT

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Solid-state relay module

PLC-INTERFACE for output functions, consisting of PLC-BSC.../ACT base terminal block with screw connection and integrated miniature solid-state relay, for installation on NS 35/7.5 rail, 1 closing contact, input: 24 V DC, output: 24-253 V AC/2.4 A

 		3 View Availability View Price

2904632

PLC-OPT-24DC/230AC/2.4/ACT

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Solid-state relay module

PLC-INTERFACE for output functions, PLC-BPT.../ACT base terminal composite with push-in connection and integrated miniature solid state relay, for NS 35/7.5 rail mounting, 1 closing contact, input: 24 V DC, output: 24-253 V AC/2.4 A

PLC-INTERFACE for output functions, consisting of PLC-BPT.../ACT basic terminal block with push-in connection and integrated miniature solid-state relay, for mounting on DIN rail NS 35/7,5, 1 N/O contact, input: 24 V DC, output: 24 - 253 V AC/2.4 A

 		3 View Availability View Price

2905214

PLC-HSC-24DC/230AC/10

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Solid-state relays

PLC-INTERFACE, hybrid solid-state relay incl. bypass relay with screw connection, for rail mounting NS 35/7.5, input: 24 V DC, output: 24 V AC-253 V AC/10 A

 		3 View Availability View Price

2905215

PLC-HPT-24DC/230AC/10

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Solid-state relays

PLC-INTERFACE, hybrid solid-state relay incl. bypass relay with push-in connection, for rail mounting NS 35/7.5, input: 24 V DC, output: 24 V AC-253 V AC/10 A

 		3 View Availability View Price

2905293

RIF-0-OPT-24DC/24DC/2

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Solid-state relay module

Pre-assembled solid-state relay module with push-in connection, consisting of: relay socket with ejector and plug-in miniature solid-state relay. Input voltage: 24 V DC. Output: 3-33 V DC/3 A

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2905294

RIF-0-OPT-24DC/48DC/100

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Solid-state relay module

Pre-assembled solid-state relay module with push-in connection, consisting of: relay socket with ejector and plug-in miniature solid-state relay. Input voltage: 24 V DC. Output: 3-48 V DC/100 mA

 		3 View Availability View Price

2905295

RIF-0-OPT-24DC/230AC/1

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Solid-state relay module

Pre-assembled solid-state relay module with push-in connection, consisting of: relay socket with ejector and plug-in miniature solid-state relay. Input voltage: 24 V DC. Output: 24-253 V AC/0.75 A

 		3 View Availability View Price

5603260

PLC-OSC-24DC/ 24DC/ 2/C1D2

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Optocoupler

PLC-INTERFACE, consisting of a base terminal block for mounting on a rail with screw connection and plug-in miniature solid-state relay, input: 24VDC, output: 3 ... 33VDC/3A, UL/CUL: approved for use in Ex zone class I, div. 2

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