DDTC143ZKA-7-F

Overview

The DDTC143ZKA-7-F is a single NPN digital transistor manufactured by Diodes Incorporated, designed for surface-mount applications. It integrates an NPN bipolar junction transistor with built-in bias resistors within a compact SOT-323 (SC-88A) package. The device features a typical input resistor of 4.7 kOhms and a resistor ratio of 0.1. Key electrical specifications include a minimum DC current gain (hFE) of 80, a continuous collector current of 100 mA, and a power dissipation rating of 200 mW. It operates reliably across a temperature range from -55°C to +150°C.

Feature Summary

• Integrates NPN transistor with dual bias resistors to reduce component count and PCB space.
• Provides simplified circuit design through pre-biased configuration eliminating external base resistors.
• Offers high thermal stability with an extended operating temperature range up to 150°C.

Applications

• General-purpose switching circuits in consumer electronics.
• Driver stages for low-current loads in portable devices.
• Logic level shifting and interface buffering between microcontrollers and peripherals.

Procurement Notes

Verify the specific suffix 'KA' against the manufacturer's official datasheet to confirm the exact pinout and internal resistance values, as packaging codes can vary. Ensure compliance with RoHS directives if required for the target market. Cross-reference the part number with authorized distributors to confirm current availability and authenticity before procurement.

Selection Notes

Select this component when a compact NPN digital transistor with a 4.7 kOhm base resistor is required. The 100 mA collector current capability suits low-power switching tasks. Compare the 200 mW power dissipation limit against the application's thermal requirements. Verify that the SOT-323 package dimensions fit the available board space constraints.

Part Context

This part belongs to the DDTC143 series of pre-biased transistors from Diodes Incorporated. The series offers various configurations with different resistor ratios and packages. The DDTC143ZKA-7-F specifically utilizes the SOT-323 package, distinguishing it from other series members like the DDTC143ZE or DDTC143XT which may use SOT-523 or SC-70 packages respectively.

Replacement Considerations

Potential substitutes include the DDTC143ZUA-7-F or DDTC143ZLP-7-F, provided they match the required 4.7 kOhm input resistance and NPN polarity. Verify that alternative packages such as SOT-323 or DFN-3 are compatible with the existing footprint and soldering process.