UNR32A500L

Overview

The UNR32A500L is a Silicon NPN epitaxial planar transistor with a built-in resistor, designed for digital circuits. It features an SSSMini3-F1 package and operates within a collector-emitter voltage of 50 V and a collector current of 80 mA. The device has a total power dissipation rating of 100 mW at 25°C and a junction temperature limit of 125°C. Key electrical characteristics include a forward current transfer ratio (hFE) ranging from 160 to 460 at IC = 5 mA, and a collector-emitter saturation voltage of 0.25 V max at IC = 10 mA. The internal base resistance (R1) is nominally 10 kΩ with a ±30% tolerance.

Feature Summary

• Integrates a single NPN transistor with a built-in bias resistor in a compact surface-mount package.
• Optimized for high-density mounting and equipment downsizing.
• Designed to contribute to low power consumption in digital circuit applications.

Applications

• General electronic equipment such as office machines and household appliances
• Communications equipment
• Measuring instruments

Procurement Notes

Verify the exact lifecycle status through official Panasonic channels before procurement, as this component may be subject to maintenance or discontinuation plans. Confirm that the specific ordering suffix matches the required packaging format. Ensure compliance with RoHS directives applicable to your region. Request the latest Product Standards documentation during the final design stage to guarantee specification accuracy.

Selection Notes

Select this component when a compact NPN switching solution with integrated biasing is required for standard digital logic interfaces. Verify that the 80 mA collector current and 100 mW power dissipation ratings meet the thermal and load requirements of the target application. Consider the 10 kΩ internal base resistance value for input drive calculations. This device is intended for general-purpose use rather than specialized high-reliability environments.

Part Context

The UNR32A5 belongs to Panasonic's series of transistors with built-in resistors, specifically engineered for digital circuit applications. These components consolidate discrete transistor and resistor functions into a single footprint, reducing assembly complexity. The UNR32A5 variant utilizes the SSSMini3-F1 package, offering a small outline form factor suitable for space-constrained designs in consumer and industrial electronics.

Replacement Considerations

Consult official Panasonic documentation for confirmed substitute part numbers. Cross-reference specifications such as VCEO, IC, PT, and package dimensions when evaluating alternatives. Verify that any replacement maintains the same NPN configuration and built-in resistor functionality.