UMA5NTR

Overview

The UMA5NTR is a dual pre-biased NPN transistor array manufactured by ROHM Semiconductor, housed in a UMT5 (SOT-353) surface-mount package. It integrates two independent NPN transistors with built-in biasing resistors to simplify circuit design. Key electrical specifications include a collector-emitter voltage (VCEO) of 50 V and a continuous collector current (IC) of 100 mA per transistor. The device features a minimum DC current gain (hFE) of 80 at IC=10 mA and VCE=5 V, with a transition frequency (fT) of 250 MHz. Internal resistor values are typically 2.2 kΩ for the base resistor (R1) and 47 kΩ for the emitter-base resistor (R2). Maximum power dissipation is 150 mW, and the maximum operating temperature reaches +150°C.

Feature Summary

• Integrates two NPN transistors with internal biasing resistors within a compact SMD footprint
• Eliminates external resistor requirements for basic switching and inverter applications
• Supports high-frequency operation up to 250 MHz transition frequency
• Designed for low-power consumption with 150 mW maximum power dissipation

Applications

• Inverter circuits requiring simplified input impedance matching
• Differential amplifier stages in signal processing equipment
• High-frequency oscillator circuits including crystal oscillators
• General-purpose switching applications in consumer electronics

Procurement Notes

Verify component authenticity through authorized distribution channels or direct manufacturer confirmation. Confirm RoHS compliance status and specific ordering suffixes match project requirements. Check datasheet revisions for any updates to electrical characteristics or packaging details before finalizing procurement orders.

Selection Notes

Select this component when a dual NPN configuration with integrated biasing is required in a small outline package. Ensure the 50 V voltage rating and 100 mA current capacity meet circuit demands. Consider the 2.2 kΩ base resistance value for input impedance calculations. Verify thermal management capabilities given the 150 mW power dissipation limit in the UMT5 package.

Part Context

The UMA5NTR belongs to ROHM's UMT5 series of complex digital transistors. It serves as a surface-mount alternative to discrete transistor pairs, reducing board space and assembly complexity. The part is functionally equivalent to single-transistor configurations like DTA123J but offers dual-channel capability in a five-terminal package suitable for automated pick-and-place manufacturing.

Replacement Considerations

Direct functional equivalents include the DTA123J configured as a dual array, though pinouts may differ. Verify compatibility with existing PCB footprints when substituting. Alternative packages such as SC-88A offer similar functionality but require mechanical clearance assessment.