RN2405,LF

Overview

The RN2405,LF is a single PNP pre-biased bipolar junction transistor manufactured by Toshiba Semiconductor and Storage. It integrates a built-in bias resistor network with a typical ratio of 1:1 within an S-Mini (SOT-363) surface-mount package. The device supports a maximum collector-emitter voltage of 50V and a continuous collector current of 100mA. Key electrical characteristics include a minimum DC current gain (hFE) of 80 at 10mA and 5V, a maximum saturation voltage of 300mV at 250µA base current and 5mA collector current, and a transition frequency of 200MHz. The component is RoHS compliant and designed for low-power switching applications.

Feature Summary

• Integrates dual resistors with a 1:1 ratio directly into the transistor package to simplify circuit design.
• Provides high-speed switching capabilities suitable for interface and driver circuits.
• Utilizes a compact S-Mini surface-mount footprint to minimize board space requirements.

Applications

• Switching circuits
• Inverter circuits
• Interface circuits
• Driver circuits

Procurement Notes

Verify the specific suffix and packaging configuration against official Toshiba documentation prior to ordering. Confirm that the requested variant matches the required RoHS compliance status and lead times. Ensure compatibility with existing assembly processes regarding the S-Mini package dimensions and soldering profiles.

Selection Notes

Select this component when a compact PNP solution with integrated biasing is required for logic-level interfacing. Compare the 1:1 resistor ratio against other models like the RN2404 if different biasing characteristics are needed. Verify that the 50V rating and 100mA current capacity meet the specific load requirements of the target application circuit.

Part Context

The RN2405,LF belongs to the RN24xx series of pre-biased transistors from Toshiba. This family combines NPN or PNP transistors with internal resistors to reduce external component count. It serves as a direct replacement for discrete transistor-resistor combinations in portable electronics and communication equipment where space efficiency is critical.

Replacement Considerations

Check for equivalent parts such as the RN2404 if the resistor ratio differs. Verify pinout compatibility with alternative S-Mini packages before substitution. Consult manufacturer cross-reference lists for confirmed functional equivalents.