UNR321N00L

Overview

The UNR321N00L is a Silicon NPN epitaxial planar transistor with built-in resistors, designed for digital circuits. It features an SSSMini3-F1 package and operates at a collector current of 100 mA with a total power dissipation of 100 mW. The device includes two internal bias resistors: R1 is 4.7 kΩ and R2 is 47 kΩ. Key electrical characteristics include a minimum DC current transfer ratio (hFE) of 80 at IC = 5 mA, a transition frequency (fT) of 150 MHz, and a maximum collector-emitter saturation voltage of 0.25 V at IC = 10 mA.

Feature Summary

• Integrates two elements into one package to reduce mounting area and assembly costs.
• Optimized for downsizing equipment and high-density mounting applications.
• Contributes to low power consumption in digital circuit designs.

Applications

• Standard applications for general electronic equipment such as office equipment.
• Communications equipment and measuring instruments.
• Household appliances.

Procurement Notes

Verify the specific lifecycle status of the UNR321N00L directly with Panasonic Industrial Devices before procurement. The official documentation indicates that this product series may be subject to maintenance or discontinuation plans. Confirming the current availability and lead times through authorized distributors is essential to ensure supply continuity for production schedules.

Selection Notes

Select the UNR321N00L when a dual-resistor bias configuration is required within a compact footprint. The 4.7 kΩ and 47 kΩ resistor values suit specific logic interface needs. Ensure the design accommodates the 100 mA collector current limit and 100 mW power dissipation constraints under the expected ambient temperature conditions.

Part Context

This component belongs to the UNR321x series of transistors with built-in resistors manufactured by Panasonic. The series offers various resistance combinations to accommodate different digital switching requirements while maintaining a standardized small outline package format suitable for automated surface-mount assembly processes.

Replacement Considerations

Consult the official Panasonic replacement guide for verified substitute part numbers. Cross-referencing with other manufacturers requires careful validation of pinout compatibility, absolute maximum ratings, and electrical performance parameters to ensure functional equivalence in the target application.

FAQ

What are the specific values of the built-in resistors for the UNR321N?

The UNR321N contains two built-in resistors: R1 is 4.7 kΩ and R2 is 47 kΩ.

What is the transition frequency of the UNR321N?

The transition frequency (fT) is specified as 150 MHz under the condition of VCB = 10 V and IE = -2 mA.

Is the UNR321N suitable for aerospace or life support systems?

No. The datasheet explicitly states that these products are intended for standard applications like household appliances and office equipment. Special applications requiring exceptional reliability, such as aerospace or life support systems, require prior consultation with sales staff.