DDTA143ZKA-7-F

Overview

The DDTA143ZKA-7-F is a PNP pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features an epitaxial planar die construction housed in an SC-59 package. The device integrates built-in biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 47 kΩ, providing a resistance ratio of 0.1. Key electrical specifications include a maximum supply voltage (VCC) of -50 V, a continuous output current (IO) of -100 mA, and a power dissipation (Pd) of 200 mW. The DC current gain (Gl) has a minimum value of -80. The component operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates built-in biasing resistors with unequal values (R1≠R2) for simplified circuit design
• Utilizes epitaxial planar die construction for reliable performance
• Available in lead-free RoHS compliant packaging

Applications

• General-purpose switching applications
• Driver circuits requiring integrated biasing
• Digital logic interface circuits

Procurement Notes

Verify the specific ordering suffix '-7-F' to confirm tape and reel packaging quantities of 3000 units per datasheet documentation. Confirm that the 'KA' case designation corresponds to the SC-59 package dimensions provided in the mechanical data section. Ensure compliance with the manufacturer's end-of-life or product change notification policies if sourcing from secondary markets.

Selection Notes

Select this component when a PNP configuration with specific internal resistor ratios is required. The 4.7 kΩ input resistor and 47 kΩ feedback resistor are fixed internally. Compare against complementary NPN types like the DDTC series if an NPN equivalent is needed. Verify that the SC-59 package footprint matches the target PCB layout constraints.

Part Context

This part belongs to the DDTA(R1≠R2) Series KA family of pre-biased transistors. It is distinguished by its specific resistor network configuration compared to other variants in the series such as the DDTA143XKA or DDTA123JKA. The 'KA' suffix indicates the SC-59 surface mount package type used across this product line.

Replacement Considerations

Direct functional substitutes within the same series include DDTA143FKA and DDTA114YKA, though their internal resistor values differ. For complementary NPN applications, consider the DDTC143ZKA-7-F. Verify pin compatibility and thermal characteristics before substitution.