RN4903,LF(CT

Overview

The RN4903,LF(CT is a dual digital transistor array manufactured by Toshiba Semiconductor and Storage. It integrates one NPN and one PNP pre-biased bipolar junction transistor within a US6 surface-mount package. The device supports a maximum collector-emitter voltage of 50V and a continuous collector current of 100mA per transistor. Internal biasing resistors are typically 22kΩ for both base and emitter connections. The component features a transition frequency of 200MHz to 250MHz and a maximum power dissipation of 200mW. It meets AEC-Q101 automotive qualification standards.

Feature Summary

• Integrates complementary NPN and PNP transistors with built-in biasing resistors to simplify circuit design.
• Automotive-grade reliability certified under the AEC-Q101 standard for harsh environment operation.
• Compact US6 surface-mount packaging enables high-density board layout and reduced footprint.

Applications

• Automotive logic interface circuits requiring robust signal switching.
• General-purpose digital switching applications in consumer electronics.
• Driver circuits for low-power loads in industrial control systems.

Procurement Notes

Verify the specific suffix configuration against official Toshiba documentation to ensure correct resistor values and automotive grade status. Confirm RoHS compliance and moisture sensitivity level requirements prior to procurement. Cross-reference distributor part numbers with manufacturer identifiers to avoid counterfeit components during sourcing.

Selection Notes

Select this component when a complementary pair of pre-biased transistors is required for phase inversion or push-pull configurations. Ensure the 50V voltage rating and 100mA current capacity align with the target load specifications. Verify that the 22kΩ internal resistance matches the driving source impedance requirements for the intended application speed.

Part Context

This part belongs to the RN49xx series of dual digital transistors from Toshiba. These devices are designed to replace discrete resistor-transistor networks, reducing component count and assembly time. The RN4903 variant specifically utilizes 22kΩ biasing resistors for both the NPN and PNP elements within the shared US6 package structure.

Replacement Considerations

Direct substitutes must match the US6 package, 50V/100mA ratings, and 22kΩ/22kΩ resistor configuration. Verify pinout compatibility and thermal characteristics before substitution. Consult official cross-reference lists for qualified alternatives.