UNR31A000L

Overview

The UNR31A0 is a silicon PNP epitaxial planar transistor with a built-in base resistor, designed for digital circuits. It utilizes the SSSMini3-F1 package to facilitate high-density mounting and equipment downsizing while contributing to low power consumption. The device features a collector-emitter voltage of -50 V and a maximum collector current of -80 mA. Key electrical characteristics include a forward current transfer ratio (hFE) ranging from 160 to 460 at an IC of -5 mA, and a transition frequency of 80 MHz. The internal connection integrates a 47 kΩ input resistor.

Feature Summary

• Integrated base resistor simplifies circuit design by eliminating external biasing components.
• Epitaxial planar construction ensures stable performance in digital switching applications.
• Compact surface-mount package supports automated assembly and space-constrained layouts.

Applications

• Digital logic interface circuits
• General-purpose switching applications
• Signal level translation

Procurement Notes

Verify the specific lifecycle status before procurement, as the datasheet indicates potential maintenance or discontinuation phases. Confirm that the required RoHS compliance aligns with current environmental regulations. Ensure the ordering suffix matches the exact packaging requirements specified by the manufacturer. Cross-reference the latest product standards to guarantee specification accuracy prior to final design approval.

Selection Notes

Select this component when a compact PNP transistor with integrated biasing is required for digital loads. Verify that the -50 V collector-emitter voltage rating exceeds the maximum operating voltage. Ensure the total power dissipation limit of 100 mW accommodates the thermal conditions of the application. Check that the hFE range meets the necessary gain requirements for the intended switching speed.

Part Context

This component belongs to Panasonic's lineup of transistors with built-in resistors, specifically engineered for digital circuit applications. The UNR31A series is designed to reduce board space and simplify schematic designs by integrating the base resistor directly into the transistor package. This family targets general electronic equipment where size reduction and power efficiency are critical design parameters.

Replacement Considerations

Consult official replacement lists for verified substitutes. Generic equivalents may not match the specific built-in resistor tolerance or package dimensions. Verify compatibility with existing PCB footprints and thermal management strategies before substitution.