4N38X

Transistor, Photovoltaic Output Optoisolators Overview

The Isocom Components 4N38X is a single-channel optocoupler featuring an infrared LED input and an NPN silicon phototransistor output. It provides electrical isolation with a rated voltage of 5300Vrms. The device supports DC input signals and offers transistor-based output switching capabilities. Available in standard 6-pin DIP and surface-mount PDIP packages, it is designed for general-purpose signal isolation applications requiring robust galvanic separation between input and output circuits.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an infrared emitting diode with an NPN silicon phototransistor for optical signal transmission
• Provides high-voltage electrical isolation between input and output circuits
• Supports direct DC input signal coupling without additional conditioning

Transistor, Photovoltaic Output Optoisolators Applications

• General-purpose digital signal isolation
• Microcontroller interface circuits
• Switching power supply feedback loops

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific package variant (DIP or SMD) required for your assembly process, as the 4N38X designation covers multiple physical forms. Confirm that the 5300Vrms isolation rating meets your safety standards. Ensure the NPN open-collector output configuration aligns with your load requirements. Cross-reference the manufacturer part number to distinguish between standard and A-grade variants if specified in your design documentation.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a standard NPN phototransistor output is sufficient for the application logic levels. Consider the 5300Vrms isolation barrier for noise immunity in industrial environments. Evaluate the package type based on PCB space constraints, choosing between through-hole DIP or surface-mount options. Verify that the input forward current limits are compatible with the driving source voltage and series resistor values.

Transistor, Photovoltaic Output Optoisolators Part Context

The 4N38X belongs to the broader family of Isocom Components optically coupled isolators. These devices typically combine an infrared LED with a silicon photodetector to provide galvanic isolation. The series is widely used in industrial control and consumer electronics for breaking ground loops and protecting sensitive circuitry from high-voltage transients.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Standard equivalents include the 4N35 and 4N37 series from various manufacturers. Verify pinout compatibility and isolation voltage ratings before substitution. The 4N38A may serve as a higher-performance variant within the same family.