UP0421100L

Overview

The UP0421100L is a composite transistor from the Panasonic UP0421x Series, featuring two NPN silicon epitaxial planar transistors with built-in base resistors in one package. It is designed for switching and digital circuits. Key electrical parameters include a collector-emitter voltage (VCEO) of 50 V, a collector current (IC) of 100 mA, and a total power dissipation (PT) of 125 mW at 25°C. The device incorporates a 10 kΩ resistor on both bases (R1 and R2). It has a transition frequency (fT) of 150 MHz and a forward current transfer ratio (hFE) of 35 to 460. The component utilizes an SSMini6-F1 surface-mount package.

Feature Summary

• Two NPN transistors integrated into a single package with built-in base resistors
• Reduces mounting area and assembly costs by half compared to discrete components
• Designed specifically for switching and digital circuit applications

Applications

• Switching circuits
• Digital logic circuits

Procurement Notes

Verify the exact part number suffix against official Panasonic documentation, as variations exist within the UP0421x series. Confirm the specific resistance values and package type required for the design. Check the latest product lifecycle status directly with the manufacturer or authorized distributors to ensure availability and compliance with current specifications before finalizing procurement plans.

Selection Notes

Select this component when space-saving dual NPN configurations with pre-biased bases are needed. Ensure the 50 V voltage rating and 100 mA current capacity meet the circuit requirements. Verify that the 10 kΩ internal base resistance aligns with the driving source impedance and switching speed needs. Consider the SSMini6-F1 package dimensions for PCB layout constraints.

Part Context

The UP0421100L belongs to the UP0421x Series of composite transistors manufactured by Panasonic Electronic Components. This series consolidates two NPN transistors with integrated base resistors into compact packages like the SSMini6-F1. These devices are engineered to simplify circuit designs by reducing the component count and board space required for dual-transistor switching applications.

Replacement Considerations

Consult the official Panasonic datasheet for direct cross-references. Potential alternatives may include other dual NPN pre-bias transistors with similar 50V/100mA ratings and 10kΩ base resistors in comparable SMD packages.