UMA4NTR

Overview

The UMA4NTR is a dual pre-biased NPN transistor array manufactured by ROHM Semiconductor. It integrates two NPN transistors with built-in biasing resistors within a compact SOT-353 (UMT5) surface-mount package. The device supports a collector-emitter voltage of 50V and a continuous collector current of 100mA per transistor. Key electrical characteristics include a maximum operating frequency of 250MHz, a power dissipation rating of 150mW, and an input resistance of 10kΩ. The component operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates two NPN transistors with internal biasing resistors in a single compact package
• Designed for high-frequency applications with a transition frequency of 250MHz
• Supports surface-mount technology via the small SOT-353 footprint

Applications

• High-frequency switching circuits
• Differential amplifier stages
• Oscillator circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm pinout compatibility and electrical tolerances. Ensure the procurement channel provides valid traceability documentation. Confirm that the delivered components match the exact part number designation to avoid functional mismatches in high-frequency designs.

Selection Notes

Select this component when a dual NPN configuration with integrated biasing is required to reduce board space and external component count. The 50V rating and 100mA current capacity suit general-purpose switching tasks. Verify that the 10kΩ input resistance aligns with the driving circuit requirements for the specific application logic levels.

Part Context

The UMA4NTR belongs to the UMA series of complex transistors from ROHM Semiconductor. This series consolidates multiple discrete transistor functions into unified packages to simplify circuit design. The UMT5 package variant offers a standardized footprint compatible with automated assembly processes commonly used in consumer electronics manufacturing.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Cross-referencing with equivalent dual NPN pre-biased arrays requires verifying pin compatibility and electrical parameters against the original datasheet specifications.