UMA4NT1

Overview

The UMA4NT1 is a dual NPN digital transistor manufactured by onsemi, housed in an SOT-363 surface-mount package. It integrates two NPN transistors with built-in base resistors to simplify circuit design and reduce component count. The device features a collector-emitter voltage rating of -50 V and a continuous collector current capacity of -0.1 A per transistor. Each internal resistor has a resistance value ranging from 1 kΩ to 10 kΩ. The unit operates within a storage temperature range of -55 °C to 150 °C and is RoHS compliant.

Feature Summary

• Integrates two NPN transistors with built-in base resistors in a single compact package
• Provides high-voltage isolation capability suitable for signal switching applications
• Designed for space-constrained PCB layouts using the SOT-363 form factor

Applications

• Differential amplifier circuits for audio or sensor signal processing
• High-frequency crystal oscillator driver stages
• General-purpose logic level shifting and switching in portable electronics

Procurement Notes

Verify the specific suffix variant against the official datasheet to ensure correct resistor values and polarity configuration. Confirm that the SOT-363 footprint matches the target PCB layout dimensions. Check for RoHS compliance documentation if required by project specifications. Ensure the supplier provides genuine onsemi components to avoid counterfeit risks associated with small-signal devices.

Selection Notes

Select this component when a dual NPN configuration with integrated biasing resistors is required to save board space. Compare the internal resistor tolerance and exact resistance values against the application requirements. Consider the SOT-363 thermal dissipation limits for continuous operation. Verify compatibility with automated pick-and-place equipment due to the small outline dimensions.

Part Context

This part belongs to the family of dual digital transistors designed for replacing discrete resistor-transistor networks. It serves as a direct replacement for older dual BJT packages where space is limited. The SOT-363 package allows for higher density mounting compared to traditional through-hole or larger surface-mount alternatives.

Replacement Considerations

The DTA114T is a publicly confirmed equivalent single PNP digital transistor often used in similar contexts, though polarity differs. For direct dual NPN replacements, verify pinout compatibility with other SOT-363 dual NPN parts from different manufacturers before substitution.