UNR42100RA

Overview

The UNR4210 is a silicon NPN epitaxial planar transistor with a built-in bias resistor, designed for digital circuits. It features an NS-B1 package and complies with the RoHS Directive (EU 2002/95/EC). The device supports a collector-emitter voltage of 50 V and a maximum collector current of 100 mA. Total power dissipation is rated at 300 mW at 25°C ambient temperature. The junction temperature range extends up to 150°C, with storage capabilities from -55°C to +150°C. The internal connection identifies pin 1 as Emitter, pin 2 as Collector, and pin 3 as Base.

Feature Summary

• Reduces equipment downsizing costs by integrating the transistor and bias resistor into a single component.
• Utilizes a new S-type package that allows supply via radial taping.

Applications

• Digital circuits
• Standard applications for office equipment
• Communications equipment
• Measuring instruments
• Household appliances

Procurement Notes

Verify the specific part number against the manufacturer's official discontinued product list before procurement. Confirm compliance requirements such as RoHS status and check for any available last-time buy notifications or maintenance plans directly from Panasonic Electronic Components to ensure long-term availability.

Selection Notes

Select this component based on the required input resistance value, which is fixed per part number within the series. Ensure the design operates within the absolute maximum ratings for voltage, current, and power dissipation. Consider the transition frequency and forward current transfer ratio characteristics when evaluating suitability for specific switching speeds and load conditions.

Part Context

This component belongs to the UNR421x Series, which includes various part numbers differentiated by their internal resistor configurations. The series provides options for different resistance values and ratios to suit diverse circuit requirements without changing the fundamental package or electrical structure.

Replacement Considerations

Consult the official Panasonic replacement guide for cross-references. Verify if alternative transistors with similar hFE ranges and built-in resistor values are available from other manufacturers, ensuring package compatibility and electrical parameter alignment.

FAQ

What is the internal connection configuration for the UNR4210?

Pin 1 is the Emitter, Pin 2 is the Collector, and Pin 3 is the Base.

Does the UNR4210 comply with environmental directives?

Yes, the product complies with the RoHS Directive (EU 2002/95/EC).

What is the maximum total power dissipation rating?

The total power dissipation is rated at 300 mW at an ambient temperature of 25°C.