MMUN2140LT1G

Overview

The MMUN2140LT1G is a PNP Bias Resistor Transistor (BRT) from onsemi, integrating a single transistor with a monolithic bias network consisting of a series base resistor and a base-emitter resistor. It operates within a collector-emitter voltage range of 50 Vdc and supports continuous collector currents up to 100 mAdc. The device features a typical input resistance of 47 kOhms and a DC current gain minimum of 120. Packaged in an SOT-23 (CASE 318) housing, it functions across a junction temperature range of -55°C to +150°C with a power dissipation capacity of 246 mW at 25°C ambient.

Feature Summary

• Integrates a single PNP transistor with a monolithic bias network comprising two resistors to replace discrete components.
• Reduces board space and component count by eliminating external resistor bias networks.
• Simplifies circuit design through the integration of internal biasing elements.

Applications

• General-purpose switching applications requiring simplified biasing.
• Logic interface circuits for level shifting or buffering.
• Driver stages for relays, lamps, or other loads.

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and shipping configuration. Ensure compliance with RoHS standards and Pb-free requirements as specified in the datasheet. Confirm that the selected variant meets the necessary automotive or industrial qualification criteria if applicable to the target application environment.

Selection Notes

Select this component when a compact solution for PNP switching with integrated biasing is required. Consider the 47 kOhm typical input resistance and 50 V maximum ratings to ensure compatibility with the driving logic levels and load voltages. Evaluate thermal performance based on the specific PCB pad layout and ambient operating conditions.

Part Context

This part belongs to the MUN2140/DTA144T family of digital transistors. It shares functional characteristics with variants like MUN2140T1G and DTA144TE but differs in packaging and marking. The LT1G suffix specifically denotes the SOT-23 package configuration with lead-free composition.

Replacement Considerations

Direct substitutes include MUN2140T1G (SC-59 package) and DTA144TE (SC-75 package). Verify pinout compatibility and thermal dissipation capabilities before substitution, as package differences affect power handling and physical footprint.