UNR421100A

Overview

The Panasonic UNR421100A is a composite device belonging to the UNR421x series, featuring an integrated Silicon NPN epitaxial planar transistor with built-in bias resistors. Designed for digital circuits, it utilizes the NS-B1 package with three pins (Emitter, Collector, Base). Key electrical ratings include a collector-emitter voltage of 50 V and a maximum collector current of 100 mA. The unit incorporates a base resistor (R1) of 10 kΩ. It complies with the RoHS Directive and supports radial taping supply.

Feature Summary

• Integrates a single NPN transistor with internal bias resistors to reduce component count
• Utilizes the compact NS-B1 package designed for radial taping supply
• Optimized for cost reduction through equipment downsizing

Applications

• Digital logic circuits
• General electronic equipment
• Office equipment
• Communications equipment

Procurement Notes

Verify the exact part number against official Panasonic documentation before ordering. Confirm that the specific suffix matches the required resistance values and hFE rank. Check the manufacturer's website for the latest lifecycle status, as this product may be subject to maintenance or discontinuation plans.

Selection Notes

Select the UNR421100A variant based on the required base resistance value and forward current transfer ratio (hFE) rank. Ensure the operating conditions remain within the absolute maximum ratings, specifically the 50 V voltage limit and 300 mW power dissipation. Verify compatibility with the intended digital circuit load requirements.

Part Context

This component is part of the UNR421x Series manufactured by Panasonic Electronic Components. The series consists of various models differentiated by their internal resistor configurations and gain rankings. All units share the same fundamental NPN transistor structure and NS-B1 package form factor.

Replacement Considerations

Consult the official Panasonic datasheet for confirmed substitute part numbers within the UNR421x family. Verify that any replacement model matches the required pinout, voltage ratings, and resistance specifications.