RN1402,LXHF

Overview

The RN1402,LXHF is a single NPN pre-biased digital transistor manufactured by Toshiba Semiconductor and Storage. It integrates an NPN bipolar junction transistor with internal base (R1) and emitter (R2) resistors, both rated at 10 kOhms. The device supports a maximum collector-emitter voltage of 50 V and a continuous collector current of 100 mA. Key electrical characteristics include a minimum DC current gain (hFE) of 50 at 10 mA and 5 V, a transition frequency of 250 MHz, and a maximum power dissipation of 200 mW. It is housed in the S-Mini (SOT-23-3) surface-mount package and holds AEC-Q101 automotive qualification.

Feature Summary

• Integrates NPN transistor with dual 10 kOhm biasing resistors for simplified circuit design
• Automotive-grade reliability certified under AEC-Q101 standards
• High-speed switching capability with 250 MHz transition frequency
• Compact S-Mini surface-mount packaging for space-constrained applications

Applications

• General-purpose switching circuits in automotive electronics
• Driver stages for relays, solenoids, and small motors
• Logic level translation between microcontrollers and peripheral devices
• Pull-up or pull-down resistor replacement in digital logic interfaces

Procurement Notes

Verify the specific suffix LXHF against the official Toshiba datasheet to confirm lead-free compliance and tape-and-reel packaging specifications. Ensure the ordering part number matches the exact resistance values and package type required for the target application. Cross-reference the manufacturer's latest documentation to confirm current production status and any potential obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when a single NPN switch with integrated 10 kOhm base and emitter resistors is required. The 50 V rating and 100 mA current capacity suit low-power digital control tasks. Compare the 200 mW power dissipation limit against thermal constraints. Verify that the S-Mini footprint aligns with the PCB layout requirements and that the 250 MHz speed meets the signal integrity needs of the interface.

Part Context

This part belongs to Toshiba's RN series of pre-biased transistors, which combine BJT functionality with built-in biasing networks to reduce external component count. The RN1402 variant specifically denotes a single NPN configuration with equal 10 kOhm resistors. The LXHF suffix indicates lead-free composition and specific packaging format, distinguishing it from other variants like RN1402,LF which may differ in termination finish or reel configuration.

Replacement Considerations

Direct substitutes must match the NPN polarity, 50 V VCEO, 100 mA Ic, and 10 kOhm/10 kOhm resistor ratio. Compatible alternatives include the RN1302,LXHF if the USM-3 package is acceptable, or other single NPN pre-biased transistors from Toshiba such as the RN2103 series with adjusted resistance values. Verify pinout compatibility and thermal performance before substitution.