UNR31AE00L

Overview

The UNR31AE00L is a PNP pre-biased bipolar junction transistor (BJT) manufactured by Panasonic Electronic Components. It integrates base and emitter-base resistors within a compact SSSMini3-F1 package, which corresponds to the SOT-723 form factor. The device features a collector-emitter breakdown voltage of 50 V and a maximum continuous collector current of 100 mA. Key electrical parameters include a DC current gain (hFE) of at least 35 at Ic=5mA and Vce=10V, with a saturation voltage of 250 mV at Ib=300µA and Ic=10mA. Internal resistors R1 and R2 are both 10 kOhms. The component has a maximum power dissipation of 100 mW and a transition frequency of 80 MHz.

Feature Summary

• Integrated biasing network with built-in base and emitter-base resistors simplifies circuit design.
• Compact surface-mount packaging suitable for space-constrained applications.
• Designed for high-speed switching operations with specified transition frequency.

Applications

• Switching circuits in portable electronic devices
• Logic level translation interfaces
• Driver stages for small signal amplification

Procurement Notes

Verify part status as obsolete through official Panasonic channels or authorized distributors before procurement planning. Confirm RoHS compliance status, as documentation indicates non-compliance for this specific variant. Ensure sourcing from verified suppliers to avoid counterfeit components. Request original datasheets for final technical validation prior to integration into production designs.

Selection Notes

Select this component when a PNP pre-biased transistor with 50V rating and 100mA current capacity is required. The integrated 10kOhm resistors reduce external component count. Verify that the SSSMini3-F1 package fits the PCB layout constraints. Consider the obsolete status for long-term supply chain stability and evaluate alternative active parts if future production is planned.

Part Context

This component belongs to the UNR31 series of pre-biased transistors from Panasonic. These devices are designed to replace discrete resistor-transistor combinations, saving board space and assembly time. The UNR31AE00L specifically denotes the PNP configuration with defined internal resistance values, distinguishing it from other variants in the family with different resistor ratios or NPN configurations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct replacements should be sourced based on matching electrical specifications: PNP type, 50V Vceo, 100mA Ic, SOT-723 package, and integrated 10k/10k resistors. Consult manufacturer cross-reference guides for updated alternatives.