UNR521W00L

Overview

The Panasonic UNR521W00L is a Silicon NPN epitaxial planar transistor with built-in bias resistors, designed for digital circuits. It features an S-Mini3-G1 package (SC-70) and supports automatic insertion via tape packing. Key electrical parameters include a collector-emitter voltage of 50 V, a maximum collector current of 100 mA, and a total power dissipation of 150 mW at 25°C. The transition frequency is rated at 150 MHz. The device integrates two resistors: R1 (Base) is 47 kΩ and R2 (Emitter) is 22 kΩ.

Feature Summary

• Integrates dual bias resistors to reduce component count and equipment size.
• Utilizes the S-Mini3-G1 surface mount package for automated assembly.

Applications

• Digital logic interface circuits
• Switching applications in general electronic equipment

Procurement Notes

Verify the exact part number against official manufacturer documentation before procurement. Confirm that the specific suffix matches the required resistance values and hFE ranking. Check the latest product lifecycle status on the manufacturer's website as availability may vary.

Selection Notes

Select this component when a compact NPN pre-biased transistor with specific dual resistor ratios is needed. Ensure the 50V voltage rating and 100mA current capacity meet the circuit requirements. Verify the integrated resistor values align with the design specifications for base and emitter biasing.

Part Context

This component belongs to the UNR521x series of pre-biased transistors from Panasonic Industry. These devices are engineered to simplify circuit design by combining a single NPN transistor with internal biasing resistors into a single surface-mount package.

Replacement Considerations

Direct substitutes within the same series include UNR521E00L, which shares the same pinout and similar electrical characteristics but may have different resistor values or hFE rankings. Always verify datasheet compatibility before substitution.