UNR921TJ0L

Overview

The UNR921TJ0L is a silicon NPN epitaxial planar transistor with built-in bias resistors, designed for digital circuits. It features an SS-Mini3-F1 package (EIAJ SC-89) with three pins. Key electrical parameters include a collector-emitter voltage of 50 V, a collector current of 100 mA, and a total power dissipation of 125 mW. The component integrates a base resistor (R1) of 22 kΩ and an emitter resistor (R2) of 47 kΩ. It exhibits a forward current transfer ratio (hFE) ranging from 80 to 400 at IC = 5 mA and VCE = 10 V, with a transition frequency of 150 MHz.

Feature Summary

• Integrates two internal bias resistors to reduce external component count and equipment size.
• Utilizes the compact SS-Mini3-F1 surface-mount package suitable for automatic insertion via tape packing.

Applications

• Digital circuit switching applications
• General electronic equipment such as office machines and communications devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm packaging details and compliance status. Ensure the component meets the required environmental standards for the intended application. Cross-reference the part number with official Panasonic Industry catalogs to confirm availability and current specifications before finalizing procurement decisions.

Selection Notes

Select this component when a compact NPN transistor with fixed bias ratios is required for digital logic interfacing. The integrated 22 kΩ base and 47 kΩ emitter resistors simplify driver circuit design. Consider the 150 MHz transition frequency and 125 mW power dissipation limits when evaluating thermal management and switching speed requirements for the target system.

Part Context

This device belongs to the UNR921xJ series of transistors with built-in resistors manufactured by Panasonic Industry. The series offers various resistance combinations to suit different digital driving needs. The UNR921TJ variant specifically provides a 22 kΩ base resistor and a 47 kΩ emitter resistor within the standard SS-Mini3 package format.

Replacement Considerations

Consult the official datasheet for alternative part numbers within the UNR921xJ series that offer different resistance values. Verify pin compatibility and electrical ratings before substituting with other manufacturers' pre-biased transistors.

FAQ

What are the specific values of the built-in resistors in the UNR921TJ?

The UNR921TJ contains a base resistor (R1) of 22 kΩ and an emitter resistor (R2) of 47 kΩ.

What is the maximum collector-emitter voltage rating?

The maximum collector-emitter voltage (VCEO) is rated at 50 V.

What package type does the UNR921TJ use?

It uses the SS-Mini3-F1 package, also known as EIAJ SC-89.