DDTA144WKA-7-F

Overview

The DDTA144WKA-7-F is a PNP pre-biased small signal surface mount transistor from Diodes Incorporated, housed in an SC-59 package. It features built-in biasing resistors with nominal values of R1=47kΩ and R2=22kΩ. The device supports a supply voltage up to -50V and a continuous collector current of -100mA. Power dissipation is rated at 200mW, with an operating temperature range spanning from -55°C to +150°C. The minimum DC current gain (hFE) is specified as 56.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated unequal biasing resistors simplify circuit design
• Lead-free plating with matte tin finish over copper leadframe
• RoHS compliant and manufactured using green molding compound

Applications

• General-purpose switching applications
• Driver circuits for logic interfaces
• High-density PCB designs requiring compact SMD packages

Procurement Notes

Verify the specific ordering suffix and date code upon purchase, as manufacturing processes may evolve. Confirm that the component meets RoHS standards if required by your assembly specifications. Check for any product change notifications regarding material composition or wafer sources before finalizing procurement plans.

Selection Notes

Select this component when a PNP digital transistor with a 47kΩ input resistor and 22kΩ base-emitter resistor is required. Ensure the SC-59 package dimensions fit the designated footprint. Verify that the -100mA output current rating satisfies the load requirements of the target application circuit.

Part Context

This part belongs to the DDTA144 series of pre-biased transistors. It serves as the PNP counterpart to the DDTC144 series NPN devices. The KA suffix indicates the SC-59 surface mount package configuration used for high-volume automated assembly.

Replacement Considerations

Direct substitutes include other DDTA144 variants with identical resistor ratios in the same package, such as DDTA144WCA-7-F (NPN equivalent). Cross-reference datasheets to confirm pinout compatibility and electrical parameter alignment.