UNR521K00L

Overview

The UNR521K00L is a Silicon NPN epitaxial planar transistor with built-in resistors, designed for digital circuits. It features an S-Mini (SC-70) package with three terminals: Base, Emitter, and Collector. The device has a maximum collector-emitter voltage of 50 V and a maximum collector current of 100 mA. Internal resistance values are R1 = 10 kΩ and R2 = 4.7 kΩ, yielding a nominal ratio of 2.13. Transition frequency is specified at 150 MHz.

Feature Summary

• Integrates two biasing resistors to reduce component count and board space
• Utilizes an S-Mini surface-mount package for automated assembly

Applications

• Digital logic interface circuits
• Switching applications in consumer electronics
• General-purpose signal processing

Procurement Notes

Verify the specific ordering code against Panasonic's official documentation to confirm availability status. Check for lifecycle stages such as planned maintenance or discontinuation before finalizing procurement plans. Ensure compliance with RoHS directives applicable to your region.

Selection Notes

Select this component when a compact NPN solution with fixed base biasing is required. Verify that the internal resistor values meet the circuit design requirements. Confirm that the 50 V voltage rating and 100 mA current capacity align with the operational parameters of the target application.

Part Context

This part belongs to the UNR521x series of transistors with built-in resistors manufactured by Panasonic Electronic Components. The series offers various resistor combinations within the same SC-70 package footprint to simplify digital circuit designs.

Replacement Considerations

Consult Panasonic's official cross-reference lists for verified substitutes. Ensure any replacement maintains the same pinout, voltage ratings, and integrated resistor values.