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The DDTC124TUA-7-F is an NPN pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features epitaxial planar die construction and includes a single built-in biasing resistor (R1) with a nominal value of 22 kΩ. The device operates within a collector-emitter voltage range of up to 50 V and supports a continuous collector current of 100 mA. Power dissipation is rated at 200 mW, with a thermal resistance from junction to ambient air of 625 °C/W. The component utilizes an SOT323 package and offers a gain-bandwidth product of 250 MHz.
Verify the specific ordering suffix against official manufacturer documentation to ensure correct packing quantity and carrier type. Confirm that the requested part number matches the active status listed in the latest datasheet revision. Check for any recent production change notices that may affect marking codes or packaging specifications before finalizing procurement orders.
Select this component when a compact NPN solution with integrated base resistance is required. Ensure the 22 kΩ input resistor aligns with the target drive current requirements. Verify that the SOT323 footprint fits the available PCB space and that the 50 V voltage rating exceeds the maximum operating voltage in the application environment.
This part belongs to the DDTC R1-only series designed for surface mount technology. It complements other variants in the family that offer different resistor values or dual-resistor configurations. The UA suffix indicates the specific SOT323 package style used for space-constrained designs.
Direct substitutes include other DDTC124TUA variants with identical electrical characteristics but different packing quantities. Cross-reference with DDTA124TUA if a PNP equivalent is needed for complementary circuit topologies.