UNR921VJ0L

Overview

The UNR921VJ0L is a Silicon NPN epitaxial planar transistor with built-in resistors, designed for digital circuits. It features an SS-Mini3-F1 package (EIAJ SC-89) with three pins: Base (1), Emitter (2), and Collector (3). The device integrates two internal resistors: R1 (Base) at 2.2 kΩ and R2 (Emitter) at 2.2 kΩ. Absolute maximum ratings include a collector-emitter voltage of 50 V, collector current of 100 mA, and total power dissipation of 125 mW at 25°C. Electrical characteristics specify a forward current transfer ratio (hFE) of 6 to 20 at IC = 5 mA and VCE = 10 V, with a transition frequency of 150 MHz.

Feature Summary

• Integrates dual bias resistors to reduce component count and board space in digital switching applications.
• Utilizes the compact SS-Mini3-F1 surface-mount package suitable for automated tape-and-reel processing.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to confirm pinout compatibility and resistance values. Ensure the procurement source provides official documentation matching the UNR921xJ series specifications. Confirm RoHS compliance status if required by the design specification. Cross-reference the part number with the official Panasonic Electronic Components catalog to avoid obsolete variants.

Selection Notes

Select this component when a pre-biased NPN transistor with equal base and emitter resistors is required for digital switching. The 2.2 kΩ resistor values are suitable for standard logic levels. Verify that the 50 V collector-emitter voltage rating meets the circuit's maximum operating voltage. Consider the 125 mW power dissipation limit relative to the ambient temperature and thermal management strategy of the final assembly.

Part Context

The UNR921VJ0L belongs to the UNR921xJ Series, a family of silicon NPN transistors with built-in resistors manufactured by Panasonic Electronic Components. This series is engineered to simplify circuit design by replacing discrete biasing networks with integrated solutions. The 'VJ' designation specifically identifies the unique combination of internal resistance values within the broader product line.

Replacement Considerations

Consult the UNR921xJ series table for alternative part numbers with different resistance ratios. Direct substitutes must match the SS-Mini3-F1 package and electrical ratings. Verify functional equivalence before implementation.

FAQ

What are the specific values of the built-in resistors for the UNR921VJ?

The UNR921VJ includes a base resistor (R1) of 2.2 kΩ and an emitter resistor (R2) of 2.2 kΩ.

What is the maximum collector-emitter voltage rating?

The absolute maximum rating for collector-emitter voltage (VCEO) is 50 V.

What is the typical forward current transfer ratio (hFE)?

The hFE ranges from 6 to 20 when measured at a collector current of 5 mA and a collector-emitter voltage of 10 V.