DDTC143XCA-7

Overview

The DDTC143XCA-7 is an NPN pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features built-in biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 10 kΩ. The device operates within a supply voltage range up to 50 V and supports a continuous collector current of 100 mA. Power dissipation is rated at 200 mW, with a thermal resistance (junction to ambient) of 625 °C/W. The component is housed in a SOT-23 package and functions across an operating temperature range from -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated biasing resistors eliminate external resistor requirements
• Qualified to AEC-Q101 standards for high reliability applications

Applications

• Inverter circuits
• Interface drivers
• General switching applications

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging details such as reel size and tape width. Confirm RoHS compliance status and check for any product change notifications prior to procurement to ensure alignment with manufacturing specifications.

Selection Notes

Select this component when a single NPN transistor with unequal internal biasing resistors is required. Ensure the design accommodates the specified input voltage limits and power dissipation constraints. Verify that the SOT-23 package dimensions fit the target PCB layout.

Part Context

This part belongs to the DDTC (R1≠R2 Series) CA family of pre-biased transistors. It is distinct from other series members by its specific 4.7 kΩ base resistor and 10 kΩ emitter-base resistor configuration. The 'CA' designation indicates the SOT-23 case style used for surface mount assembly.

Replacement Considerations

Direct substitutes within the same manufacturer's portfolio include parts with identical electrical characteristics and pinouts. Verify resistor ratios and gain specifications when considering cross-manufacturer alternatives.