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The DDTC125TCA-7 is an NPN pre-biased transistor from the R1-only series, housed in a SOT23 package. It features a built-in base resistor (R1) of 200 kΩ. The device supports a maximum collector-emitter voltage (VCEO) and collector-base voltage (VCBO) of 50 V, with a continuous collector current rating of 100 mA. Power dissipation is limited to 200 mW at +25°C, supported by a thermal resistance of 625 °C/W. The transition frequency (fT) is typically 250 MHz. Operating and storage temperatures range from -55°C to +150°C.
Verify component status before procurement as this specific part number is listed as obsolete in official documentation. Confirm availability through authorized distributors or secondary markets if immediate supply is required. Ensure compliance with environmental directives such as RoHS 3 and REACH when sourcing replacements or surplus stock.
Select this component for designs requiring an NPN pre-biased transistor with a 200 kΩ internal base resistor. Verify that the 50 V voltage rating and 100 mA current capacity meet system requirements. Consider the SOT23 package dimensions for PCB layout constraints. Evaluate thermal management needs given the 200 mW power dissipation limit.
This component belongs to the DDTC (R1-only series) CA family manufactured by Diodes Incorporated. It serves as the NPN counterpart to the DDTA PNP series. The 'CA' suffix indicates specific packaging and marking conventions. Other variants in this series offer different resistor values such as 1kΩ, 2.2kΩ, and 4.7kΩ.
Check for active equivalents like DDTC125TCA-7-F if available. Verify pinout compatibility and electrical parameters including VCEO, IC, and R1 value. Ensure the replacement maintains the same SOT23 package and thermal characteristics.