EMH25T2R

Overview

The EMH25T2R is a dual NPN digital transistor manufactured by ROHM Semiconductor, housed in an SOT-563 (EMT6) surface-mount package. It integrates two transistors with built-in bias resistors to simplify circuit design and reduce component count. Key electrical specifications include a collector-emitter voltage (VCEO) of 50V, a continuous collector current (IC) of 100mA, and a power dissipation (PD) of 150mW. The device features typical input resistances ranging from 1kΩ to 47kΩ and emitter-base resistances up to 47kΩ, depending on the specific configuration variant within the series. It operates within a temperature range of -55°C to +150°C.

Feature Summary

• Dual NPN configuration with integrated base and emitter resistors for simplified driving circuits
• Compact SOT-563 surface-mount package suitable for high-density PCB layouts
• High reliability design compliant with RoHS standards

Applications

• Differential amplifier circuits
• High-frequency crystal oscillator starters
• General-purpose switching applications requiring compact dual-transistor solutions

Procurement Notes

Verify the exact suffix and resistance values against the official ROHM datasheet before ordering, as the EMH2 series includes multiple variants with different resistor ratios. Confirm supply status directly with authorized distributors, as availability may vary by region. Ensure the selected variant matches the required input resistance specifications for the target application circuit design.

Selection Notes

Select the EMH25T2R when a dual NPN digital transistor with integrated biasing is required in a small footprint. Compare input resistance values (R1) and emitter-base resistance values (R2) across the EMH2 series to match the specific drive requirements. Consider the 50V VCEO and 100mA IC limits to ensure adequate headroom for the intended load conditions.

Part Context

The EMH25T2R belongs to the EMH2 series of complex transistors from ROHM Semiconductor. This series is designed to replace discrete transistor pairs with single-component solutions, reducing board space and assembly time. The EMH2 series is widely used in consumer electronics and industrial equipment where space constraints and cost efficiency are critical design factors.

Replacement Considerations

The EMX2 is listed as a similar level part with the same SOT-563 package and NPN+NPN polarity. Verify pin compatibility and specific electrical parameters such as hFE and resistor values before substituting.