MUN2111T3

Overview

The MUN2111T3 is a PNP Bias Resistor Transistor (BRT) from the MUN2111T1 series, manufactured by onsemi. It integrates a single PNP silicon transistor with a monolithic bias network consisting of two resistors: a series base resistor (R1) and a base-emitter resistor (R2). Both resistors have a nominal value of 10 kΩ. The device is housed in an SC-59 (SOT-23) surface-mount package. Key electrical ratings include a maximum collector current of 100 mA and a collector-emitter breakdown voltage of 50 Vdc. The total device power dissipation is rated at 230 mW on a minimum FR-4 pad and 338 mW on a 1.0 x 1.0 inch FR-4 pad at 25°C ambient temperature.

Feature Summary

• Integrates a PNP transistor with a monolithic bias network to replace discrete components
• Reduces printed circuit board space and component count
• Designed for low-power surface mount applications using the SC-59 package

Applications

• General-purpose switching circuits
• Driver circuits for logic interfaces
• Unregulated current sources

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm shipping configuration. The datasheet indicates that the 'T1' suffix corresponds to tape and reel packaging containing 3000 units per reel. Ensure the procurement request matches the required packaging format to avoid fulfillment delays or incorrect unit counts.

Selection Notes

Select this component when a compact PNP switching solution with integrated biasing is required. Verify that the 10 kΩ internal resistor values align with the target input impedance and drive requirements. Confirm that the 50 V collector-emitter voltage rating exceeds the maximum operating voltage of the application circuit.

Part Context

This part belongs to the MUN2111T1 series of digital transistors. Other members of this series offer different resistor combinations, such as the MUN2112T1 with 22 kΩ resistors or the MUN2113T1 with 47 kΩ resistors. All devices in the series share the same SC-59 package and fundamental transistor characteristics while varying only in the integrated resistance values.

Replacement Considerations

Direct replacements within the same family include the MUN2111T1G, which shares identical electrical specifications and pinout but may differ in environmental compliance markings. Cross-manufacturer equivalents should be evaluated based on matching V(BR)CEO, IC limits, and R1/R2 values.