KB817-B SMD Optocoupler 1 Channel Transistor Output 4 Pin 5kVrms

The KB817-B is a compact single-channel SMD optocoupler with a transistor output, designed to provide safe electrical isolation between input and output circuits. With an isolation voltage of up to 5kVrms, it effectively protects low-voltage control circuits from high-voltage transients, electrical noise, and ground loops.

Featuring a 4-pin surface-mount package, the KB817-B is ideal for automated PCB assembly and space-constrained electronic designs. It offers fast switching performance with a typical rise time of 4 s and fall time of 3 s, making it suitable for signal isolation, microcontroller interfaces, power supplies, industrial automation, and communication equipment.

Its reliable current transfer ratio and low forward voltage make it an excellent choice for commercial, industrial, and embedded electronic applications.

Features

• Part Number: KB817-B
• Single-channel optocoupler
• Transistor output
• Compact 4-pin SMD package
• High isolation voltage of 5kVrms
• Fast switching performance
• Surface-mount design for automated assembly
• Low forward voltage
• Reliable signal isolation
• Suitable for industrial and embedded electronics

Specifications

• Product Type: Optocoupler
• Model: KB817-B
• Channels: 1
• Output Type: Transistor
• Mounting Type: Surface Mount (SMD)
• Package: 4-Pin SMD
• Input Current Type: DC
• Maximum Forward Voltage: 1.4V
• Maximum Input Current: 50mA
• Isolation Voltage: 5kVrms
• Current Transfer Ratio (CTR): 50% (Min), 260% (Max)
• Typical Rise Time: 4 s
• Typical Fall Time: 3 s

Applications

• Microcontroller isolation
• Switching power supplies
• PLC interfaces
• Industrial automation
• Signal isolation
• Data communication equipment
• Motor control circuits
• Embedded systems
• Instrumentation
• General electronic circuit protection

What's in the box
1 x KB817-B SMD Optocoupler 1 Channel Transistor Output 4 Pin 5kVrms