DDTA125TKA-7-F

Overview

The DDTA125TKA-7-F is a PNP pre-biased small signal surface mount transistor from Diodes Incorporated, featuring an epitaxial planar die construction. It integrates a single internal biasing resistor (R1) with a nominal value of 200 kΩ. The device operates within a collector-emitter voltage range of -50 V and supports a continuous collector current of -100 mA, with a power dissipation rating of 200 mW. Packaged in the SC-59 case, it offers a DC current transfer ratio (hFE) ranging from 100 to 600 at IC = -1mA and VCE = -5V. The component functions reliably across an operating temperature range of -55°C to +150°C.

Feature Summary

• Integrates a built-in biasing resistor (R1 only) to simplify circuit design
• Utilizes epitaxial planar die construction for robust performance
• Available in a compact SC-59 surface mount package

Applications

• General-purpose switching applications requiring integrated biasing
• Driver circuits for low-power loads
• Logic interface buffering

Procurement Notes

Verify the specific ordering suffix against official Diodes Incorporated documentation to confirm packaging details. Ensure compliance with RoHS requirements and check for green molding compound status based on date codes. Confirm that the SC-59 package dimensions align with your PCB footprint specifications before finalizing procurement.

Selection Notes

Select this component when a PNP digital transistor with a high-value base resistor is required. The 200 kΩ input resistor makes it suitable for high-impedance logic interfaces. Compare hFE ranges and thermal resistance values against alternative models if higher current drive or different biasing ratios are needed for the specific application load.

Part Context

This part belongs to the DDTA R1-only series from Diodes Incorporated, designed as a PNP pre-biased transistor. It complements the DDTC NPN series, offering matched characteristics for push-pull configurations. The KA suffix indicates the SC-59 package style, distinguishing it from other casing options within the broader digital transistor family.

Replacement Considerations

Direct substitutes include other DDTA125 variants with identical electrical parameters but different packaging, such as DDTA123TKA-7-F if pinout compatibility allows. Verify that any replacement maintains the same -50 V breakdown voltage and 200 kΩ internal resistor tolerance.