PS2381-1Y-V-AX

Overview

The PS2381-1Y-V-AX is a single-channel transistor output optocoupler manufactured by Renesas Electronics. It integrates a Gallium Arsenide (GaAs) infrared emitting diode with an NPN silicon phototransistor within a compact 4-pin LSOP package. The device provides high isolation performance with a rated isolation voltage of 5000Vrms and a minimum isolation distance of 0.4 mm. It supports an operating ambient temperature up to 115 °C, ensuring reliability in demanding thermal environments. Key electrical characteristics include a typical rise time of 4 µs and fall time of 5 µs, with a maximum current transfer ratio of 400% at a forward current of 5 mA.

Feature Summary

• High isolation voltage capability of 5000Vrms for robust signal separation
• Integrated GaAs LED and NPN silicon phototransistor for efficient optical coupling
• Extended operating ambient temperature range up to 115 °C
• Compact 4-pin LSOP plastic package design

Applications

• Industrial control systems requiring galvanic isolation
• Signal transmission between microcontrollers and peripheral devices
• Power supply feedback loops for voltage regulation
• Solid-state relay driver circuits

Procurement Notes

Verify the specific suffix 'V-AX' against the manufacturer's latest datasheet to confirm pinout configuration and packaging details. Ensure compliance with RoHS and lead-free requirements as stated in official documentation. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm that the 4-pin LSOP footprint matches your PCB design constraints before finalizing procurement orders.

Selection Notes

Select this component when high isolation voltage and moderate speed are required for DC input applications. The NPN output type suits interfaces needing open-collector configurations. Consider the 115 °C temperature rating for environments exceeding standard industrial limits. Verify that the 5000Vrms isolation meets safety standards for your specific application class. Ensure the 4-pin LSOP package fits within available board space constraints.

Part Context

The PS2381-1 belongs to Renesas' series of single-channel photocouplers designed for general-purpose isolation. It represents a standard solution for separating low-voltage control circuits from higher-voltage loads. The LSOP package offers a balance between size and isolation creepage distance. This family of devices is widely used in consumer electronics and industrial equipment where reliable signal transmission across isolation barriers is critical.

Replacement Considerations

Check for direct substitutes within the PS2381 series, such as PS2381-1Y-V-L-AX or PS2381-1Y-V-W-AX, which may differ only in packaging or trailing specifications. Verify pin compatibility and electrical parameters before substitution. Consult Renesas documentation for approved alternative part numbers to ensure functional equivalence.