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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

2911045

ST-OE3-60DC/ 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: 48 - 60 V DC, output: 8 - 48 V DC/max. 100 mA, pluggable to base terminal blocks

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2905190

ST-OV3-24DC/ 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: 24 V DC, output: short circuit resistance, 10-30 V DC/max. 2 A, pluggable to base terminal blocks

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2911728

ST-OE2-220DC/ 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: 220 V DC, output: 8 - 48 V DC/max. 100 mA, pluggable to base terminal blocks

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2982210

PLC-OSC-125DC/300DC/ 1

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Solid-state relay module

PLC INTERFACE, integrated solid-state relay, screw connection, for symmetrical rail mounting NS 35/7.5, input: 125 V DC, output: 12-300 V DC/1 A

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2903231

ST-OV3-24DC/240AC/3

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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: 24-280 V AC/max. 3 A, pluggable to base terminal blocks

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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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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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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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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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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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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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1SNA645029R0600

1SNA645029R0600

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OBOA2000-24VDC Optocoupler R600 2A,A1-A2=24VDC,Triac

OBOA 2000-24VDC

OBOA2000-24VDC Optocoupler R600 A1-A2=24VDC,10-230VAC/25 mA-2 A,Triac

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1SNA645024R2100

1SNA645024R2100

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OBOC5000-24VDC Optocoupler R600 5A,A1-A2=24VDC,MOS-FET

OBOC 5000-24VDC

OBOC5000-24VDC Optocoupler R600 A1-A2=24VDC,4.5-58VDC/ 1 mA-5 A,MOSFET

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1SNA645529R0000

1SNA645529R0000

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OBROA2000-24VDC Optocoupler R600 2A,A1-A2=24VDC,Triac

OBROA 2000-24VAC/DC

OBROA2000-24VDC Optocoupler R600 A1-A2=24VAC/DC,10-230VAC/25 mA-2 A,Triac

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1SNA645524R2300

1SNA645524R2300

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OBROC5000-24VDC Optocoupler R600 5A,A1-A2=24VDC,MOS-FET

OBROC 5000-24VDC

OBROC5000-24VDC Optocoupler R600 A1-A2=24VDC,4.5-58VDC/ 1 mA-5 A,MOSFET

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1SNA645058R1300

1SNA645058R1300

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OBOC5000-115VAC/DC Optocoupler R600 5A,A1-A2=115VAC/DC,MOS-FET

OBOC 5000-115VAC/DC

OBOC5000-115VUC Optocoupler R600 A1-A2=115VAC/DC,4.5-58VDC/ 1 mA-5 A,MOSFET

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1SNA645059R1400

OBOC 5000-230VAC/D

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OBOC5000-230VAC/DC Optocoupler R600 5A,A1-A2=230VAC/DC,MOS-FET

OBOC 5000-230VAC/DC

OBOC5000-230VUC Optocoupler R600 A1-A2=230VAC/DC,4.5-58VDC/ 1 mA-5 A,MOSFET

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1SNA645558R1500

OBROC 5000-115VAC/

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OBROC5000-115VAC/DC Optocoupler R600 5A,A1-A2=115VAC/DC,MOS-FET

OBROC 5000-115VAC/DC

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1SNA645559R1600

1SNA645559R1600

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OBROC5000-230VAC/DC Optocoupler R600 5A,A1-A2=230VAC/DC,MOS-FET

OBROC 5000-230VAC/DC

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2900352

PLC-OPT-24DC/ 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: 24 V DC, output: 3-48 V DC/100 mA

PLC-INTERFACE, consisting of PLC-BPT base terminal .../21 with push-in connection and miniature plug-in solid-state relay, for mounting on NS 35/7.5 mounting rail, 1 open contact at rest, input: 24 V DC, output: 3-48 V DC/100 mA

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2900353

PLC-OPT-48DC/ 48DC/100

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PLC-INTERFACE, consisting of PLC-BPT.../21 basic terminal block with push-in connection and plug-in miniature solid-state relay, for mounting on DIN rail NS 35/7,5, 1 N/O contact, input: 48 V DC, output: 3 - 48 V DC/100 mA

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: 48 V DC, output: 3-48 V DC/100 mA

PLC-INTERFACE, consisting of basic terminal PLC-BPT.../21 with push-in connection and pluggable miniature solid-state relay, for mounting on DIN rail NS 35/7.5, 1 NO contact, input: 48 V DC, output: 3-48 V DC/100 mA

3 View Availability View Price

2900354

PLC-OPT-60DC/ 48DC/100

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PLC-INTERFACE, consisting of PLC-BPT.../21 basic terminal block with push-in connection and plug-in miniature solid-state relay, for mounting on DIN rail NS 35/7,5, 1 N/O contact, input: 60 V DC, output: 3 - 48 V DC/100 mA

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: 60 V DC, output: 3-48 V DC/100 mA

3 View Availability View Price

2900355

PLC-OPT-120UC/ 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 mounting on NS 35/7.5 rail, 1 closing contact, input: 120 V AC/110 V DC, output: 3-48 V DC/100 mA

3 View Availability View Price

2900356

PLC-OPT-230UC/ 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: 230 V AC/220 V DC, output: 3-48 V DC/100 mA

3 View Availability View Price

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