DMMT3904W-7-F

Overview

The DMMT3904W-7-F is a matched pair of NPN small signal transistors manufactured by Diodes Incorporated. It operates with a collector-emitter voltage (VCEO) of 40 V and a collector-base voltage (VCBO) of 60 V, supporting a maximum continuous collector current (IC) of 200 mA. The device features a total power dissipation (PD) of 200 mW at +25°C ambient temperature, with a thermal resistance (RθJA) of 625 °C/W. Electrical characteristics include a DC current gain (hFE) ranging from 40 to 300 depending on the collector current, and a transition frequency (fT) of 300 MHz. The package is SOT363, measuring approximately 2.15 mm in length and 2.10 mm in width.

Feature Summary

• Intrinsically matched NPN transistor pair built using adjacent die from the same wafer for high precision.
• Provides tight matching tolerances of 2% on current gain (hFE) and 2mV on base-emitter voltage (VBE).
• Fully internally isolated within a compact surface mount package to minimize circuit footprint.

Applications

• Current mirrors
• Differential and instrumentation amplifiers
• Comparators

Procurement Notes

Verify the specific ordering suffix '-7-F' against official Diodes Incorporated documentation to confirm packaging details. The standard packing quantity for this suffix is 3,000 units per reel. Ensure that the required tape width and carrier specifications align with automated assembly equipment capabilities before finalizing procurement orders.

Selection Notes

Select this component when precise matching between two NPN transistors is required within a single package. The intrinsic matching eliminates the need for external trimming or selection of discrete components. Verify that the 200 mW power dissipation rating and 625 °C/W thermal resistance are sufficient for the intended operating conditions and PCB layout.

Part Context

This part belongs to the DMMT3904W series of matched dual NPN transistors. It is designed as an alternative to discrete matched pairs, offering improved performance consistency and reduced board space. The product is fully RoHS compliant and halogen-free, adhering to environmental standards for modern electronics manufacturing.

Replacement Considerations

Diodes Incorporated offers an automotive-compliant variant under the separate datasheet DIODES™ (DMMT3904WQ). Verify if automotive qualification is required for the application before considering this substitution.