DTDG14GPT100

Overview

The DTDG14GPT100 is an NPN digital transistor in the SOT-89 (TO-243) package, manufactured by ROHM Semiconductor. It integrates bias resistors and a built-in Zener diode for protection against reverse surges from inductive loads. Key electrical parameters include a collector-emitter voltage of 60V, a continuous collector current of 1A, and a power dissipation of 0.5W. The device features a high DC current gain (hFE) with a minimum value of 300 at VCE=2V and IC=500mA. It exhibits a low saturation voltage of 400mV at IC/IB=500mA/5mA. The emitter-base resistance R2 is available in values ranging from 1kΩ to 10kΩ. The component operates within a storage temperature range of -55°C to 150°C.

Feature Summary

• High DC current gain (hFE) of 300 or greater under specified conditions
• Low saturation voltage for efficient switching performance
• Integrated Zener diode provides robust protection against reverse surge voltages caused by inductive loads

Applications

• Driver circuits requiring surge protection
• Switching applications with inductive load interfaces
• General-purpose digital logic interfacing

Procurement Notes

Verify the supply status before design finalization, as this specific part number may be designated as not recommended for new designs. Confirm that the ordering suffix corresponds to the required tape-and-reel packaging quantity. Ensure compatibility with existing PCB footprints for the SOT-89 package. Cross-reference the specific R2 resistor value variant needed for the circuit design. Check for automotive-grade alternatives if AEC-Q101 compliance is required.

Selection Notes

Select this component when a high-current NPN digital transistor with integrated surge protection is required. The SOT-89 package supports higher current handling compared to smaller surface-mount packages. Verify that the 60V collector-emitter voltage rating exceeds the maximum circuit voltage. Consider the integrated Zener diode function if protecting against back-EMF from relays or motors is necessary. Compare hFE requirements against the driving source capability.

Part Context

This component belongs to ROHM's series of digital transistors with built-in resistors and Zener diodes. It is designed to simplify circuit design by reducing the number of external components. The SOT-89 package offers a balance between thermal performance and size. Similar variants exist with different R2 values or without the Zener diode. The product line targets industrial and consumer electronics applications requiring reliable switching.

Replacement Considerations

Check for DTDG14GPP or DTDG14GPDHZG as potential alternatives depending on supply status and automotive qualification needs. Verify pinout compatibility and electrical parameter equivalence before substitution.