UNR321000L

Overview

The Panasonic UNR321000L is a silicon NPN epitaxial planar transistor with a built-in base resistor, designed for digital circuits. It features a collector-emitter breakdown voltage of 50 V and a maximum collector current of 100 mA. The device includes an internal base resistor (R1) of 47 kΩ. Electrical characteristics include a DC current gain (hFE) ranging from 160 to 460 at IC = 5 mA and VCE = 10 V, with a saturation voltage of 0.25 V at IC = 10 mA and IB = 0.3 mA. Transition frequency is specified at 150 MHz. Total power dissipation is rated at 100 mW. The component utilizes the SSSMini3-F1 surface-mount package.

Feature Summary

• Integrates a single base resistor to simplify circuit design and reduce component count.
• Optimized for downsizing equipment and enabling high-density mounting on printed circuit boards.
• Designed to contribute to low power consumption in digital logic applications.

Applications

• General electronic equipment such as office machines and household appliances.
• Communications equipment signal processing.
• Measuring instruments control circuits.

Procurement Notes

Verify the specific lifecycle status directly with Panasonic Industry, as the datasheet indicates maintenance or discontinuation planning. Confirm that the SSSMini3-F1 package dimensions align with existing footprint designs. Ensure compliance with RoHS standards if required by the target application environment. Request the latest product standards before final purchasing decisions to account for potential specification updates.

Selection Notes

Select this component when a compact NPN pre-biased transistor with a 47 kΩ base resistor is required. Verify that the 100 mA collector current and 100 mW power dissipation meet the load requirements. Consider the 150 MHz transition frequency for switching speed needs. Ensure the operating temperature range fits within the -55°C to +125°C storage limits and standard operating conditions.

Part Context

This part belongs to the UNR32 series of digital transistors manufactured by Panasonic Industry. The series includes variants with different internal resistance configurations, such as dual resistors or lower resistance values. These components are specifically engineered for use in general-purpose digital logic circuits where space efficiency and simplified biasing networks are prioritized over high-power handling capabilities.

Replacement Considerations

Direct substitutes may include other NPN pre-biased transistors with similar 47 kΩ base resistance and 50V ratings. Verify pinout compatibility with the SSSMini3-F1 package. Check equivalent hFE ranges and saturation voltages to ensure logical level matching. Consult manufacturer cross-reference lists for confirmed compatible alternatives.