DDTA143XKA-7-F

Overview

The DDTA143XKA-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 = 4.7 kΩ and R2 = 10 kΩ. The device supports a supply voltage (VCC) of -50 V and a continuous output current (IO) of -100 mA. Power dissipation is rated at 200 mW, with a thermal resistance (RθJA) of 625 °C/W. Operating and storage temperatures range from -55°C to +150°C. The DC current gain (Gl) has a minimum value of -30, and the input resistor tolerance is ±30%.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated unequal biasing resistors (R1≠R2) simplify circuit design
• Lead-free plating with matte tin finish over copper leadframe
• RoHS compliant and manufactured with green molding compound

Applications

• General-purpose switching applications
• Driver circuits for logic interfaces
• Biasing networks in analog signal processing

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and date code markings against the latest datasheet specifications. Ensure proper handling procedures are followed due to moisture sensitivity level 1 classification. Review application notes for recommended pad layouts to optimize thermal performance.

Selection Notes

Select this component when a PNP configuration with specific unequal biasing ratios is required. Compare nominal resistor values against circuit requirements to ensure correct turn-on characteristics. Consider the SC-59 package dimensions for PCB layout constraints. Evaluate power dissipation limits relative to ambient temperature conditions.

Part Context

This part belongs to the DDTA143 series of pre-biased transistors. Complementary NPN types are available within the DDTC family. The KA suffix indicates the SC-59 package style. Other variants in the series offer different resistor combinations for varied biasing needs.

Replacement Considerations

Direct substitutes include other DDTA143XKA variants from Diodes Incorporated. Verify pinout compatibility and electrical parameters before substitution. Check for equivalent packaging and marking codes to ensure seamless integration.