UMD12NTR

Overview

The UMD12NTR is a dual pre-biased digital transistor manufactured by Rohm Semiconductor, housed in a surface-mount UMT6 (SOT-363) package. It integrates one NPN and one PNP transistor with built-in biasing resistors. Key electrical specifications include a maximum collector-emitter voltage of 50V and a continuous collector current of 100mA. The device features a typical base resistance of 47 kΩ for both transistors and a power dissipation rating of 150mW. It offers a DC current gain (hFE) of at least 68 at 5mA/5V and a transition frequency of 250MHz, suitable for high-speed switching applications.

Feature Summary

• Integrates complementary NPN and PNP bipolar junction transistors within a single compact surface-mount package to reduce component count.
• Includes internal base biasing resistors to simplify circuit design and eliminate external resistor requirements.
• Optimized for high-frequency operation with a transition frequency of 250MHz and low saturation voltage characteristics.

Applications

• General-purpose digital switching circuits
• Driver circuits for small-signal loads
• Logic level translation interfaces

Procurement Notes

Verify the specific ordering suffix when sourcing, as variants such as UMD12NCT (cut tape) and UMD12NDKR (Digi-Reel) exist alongside the standard reel configuration. Confirm RoHS compliance status and ensure the supplier provides official datasheets matching the exact part number to avoid confusion with similar ROHM digital transistor families.

Selection Notes

Select this component when a complementary pair of pre-biased transistors is required in a minimal footprint. The 47kΩ internal resistors are fixed; verify compatibility with the driving logic levels. Ensure the application current remains below 100mA and power dissipation stays within 150mW limits. Consider thermal management if operating near maximum ratings.

Part Context

This part belongs to the UMD12 series of complex transistors from Rohm Semiconductor. It is functionally equivalent to discrete combinations of DTA144E and DTC144E transistors but offers superior space efficiency. The UMT6 package allows for automated surface-mount assembly, making it suitable for dense PCB layouts in consumer electronics and industrial control systems.

Replacement Considerations

Publicly documented substitutes include Diodes Incorporated DCX114EU-7-F and onsemi SMUN5313DW1T3G. Verify pinout compatibility and electrical parameter alignment before substitution, as internal resistor values or transistor polarities may differ between manufacturers.