UMA11NTR

Overview

The UMA11NTR is a dual NPN digital transistor manufactured by ROHM Semiconductor, housed in a compact SOT-353-5 (UMT5) surface-mount package. It integrates two NPN transistors with built-in biasing resistors to simplify circuit design and reduce component count. Key electrical specifications include a maximum collector-emitter voltage (Vceo) of 300 mV, a continuous collector current of 100 mA, and a power dissipation rating of 150 mW. The device features a typical input resistance of 2.2 kΩ and a DC current gain (hFE) minimum of 80 at 10 mA and 5 V. It supports a maximum operating frequency of 250 MHz and functions reliably within an ambient temperature range up to +150°C.

Feature Summary

• Dual NPN configuration with integrated base resistors for simplified switching applications
• Low saturation voltage and high current gain for efficient signal processing
• Compact SOT-353-5 surface-mount package suitable for space-constrained designs

Applications

• General-purpose switching circuits in consumer electronics
• Driver stages for small-signal logic interfaces
• Level shifting and buffer applications in portable devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct packaging and tape-and-reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration into production workflows. Cross-reference the part number with authorized distributors to validate authenticity and supply chain integrity.

Selection Notes

Select this component when a dual NPN digital transistor with low voltage drop and moderate current handling is required. Ensure the application operates within the 100 mA collector current limit and 150 mW power dissipation constraints. Verify that the 2.2 kΩ internal base resistance aligns with the driving source impedance and desired switching speed for the target circuit design.

Part Context

The UMA11NTR belongs to ROHM's UMG series of digital transistors, which are designed to replace discrete resistor-transistor combinations. This series emphasizes miniaturization and ease of use in modern electronic systems. The UMT5 package provides a small footprint while maintaining reliable thermal performance for surface-mount assembly processes commonly used in mass-produced consumer goods.

Replacement Considerations

Direct substitutes may include other dual NPN digital transistors in SOT-353 packages from different manufacturers, provided pin compatibility and electrical parameters such as Vceo, Ic, and R1 match the original design requirements.