UNR411100A

Overview

The Panasonic UNR411100A is a small signal PNP silicon epitaxial planar transistor featuring built-in bias resistors, designed for digital circuits. It utilizes the NS-B1 through-hole package with three pins: emitter, collector, and base. The device supports a maximum collector current of 100 mA and a collector-emitter voltage of -50 V. Internal resistance values are R1 = 10 kΩ and R2 = 10 kΩ. Key electrical characteristics include a forward current transfer ratio (hFE) of 35 at IC = -5 mA and VCE = -10 V, a transition frequency of 80 MHz, and a total power dissipation rating of 300 mW.

Feature Summary

• Integrates dual bias resistors to reduce component count and equipment size in digital circuit designs.
• Utilizes the compact NS-B1 radial taping package for efficient supply and mounting.

Applications

• Digital logic interface circuits
• Switching applications requiring integrated biasing
• General-purpose electronic equipment

Procurement Notes

Verify the exact part number suffix against official Panasonic documentation, as standard distributors may list variations like UNR411E or UNR4111. Confirm lifecycle status directly with the manufacturer, as this series has been subject to maintenance or discontinuation phases. Ensure compliance with RoHS directives if required by your specific application standards.

Selection Notes

Select based on the required internal resistor ratios; the UNR4111 variant specifically provides a 1:1 ratio (10k/10k). Verify that the -50V collector-emitter voltage and 100mA current limits meet the circuit requirements. Consider the NS-B1 package dimensions for PCB layout compatibility and ensure thermal management supports the 300mW power dissipation limit.

Part Context

This component belongs to the UNR411x Series of pre-biased transistors manufactured by Panasonic Electronic Components. The series offers various resistor combinations tailored for different digital switching needs. The UNR411100A represents a specific configuration within this family, distinguished by its 10kΩ/10kΩ internal resistor setup and PNP polarity.

Replacement Considerations

Consult Panasonic's official cross-reference guides for direct replacements. Generic equivalents must match the PNP type, -50V rating, 100mA current, and NS-B1 package. Verify internal resistor values (10kΩ/10kΩ) and hFE characteristics to ensure functional parity in the target circuit.

FAQ

What are the specific values of the built-in resistors for the UNR4111?

The UNR4111 features two built-in resistors: R1 is 10 kΩ and R2 is 10 kΩ.

What is the transition frequency (fT) of this transistor?

The transition frequency is specified as 80 MHz under conditions of VCB = -10 V, IE = 1 mA, and f = 200 MHz.

Is this component suitable for high-temperature environments?

Yes, the junction temperature rating is up to 150°C, and the storage temperature range extends from -55°C to +150°C.