TDTC143Z,LM

Overview

The TDTC143Z is a silicon NPN epitaxial type digital transistor manufactured by Toshiba Electronic Devices & Storage Corporation. It integrates bias resistors to simplify circuit design and reduce component count. The device operates with a supply voltage of 50 V and supports an output current of 100 mA, dissipating up to 320 mW. Key electrical parameters include a minimum DC current gain (GI) of 80 at 10 mA, an input resistance (R1) typically rated at 4.7 kΩ, and a transition frequency (fT) of 250 MHz. The resistance ratio (R2/R1) is nominally 10. It is housed in a compact SOT-23 package.

Feature Summary

• Integrated bias resistor reduces the number of external parts required, enabling system size reduction and assembly time savings.
• Complementary configuration available with the TDTA143Z PNP counterpart for push-pull or bridge applications.

Applications

• Switching circuits
• Inverter circuits
• Driver circuits

Procurement Notes

Verify the specific ordering code against the official Toshiba datasheet to ensure correct packaging and marking options. Confirm RoHS compliance status directly with the manufacturer or authorized distributor prior to procurement. Ensure that the selected variant meets the thermal derating requirements specified in the Toshiba Semiconductor Reliability Handbook for the intended operating environment.

Selection Notes

Select this component when a compact NPN digital transistor with integrated biasing is required for switching or inversion tasks. The 4.7 kΩ input resistance suits standard logic interface levels. Consider the complementary TDTA143Z if a matched PNP pair is needed. Verify that the 50 V collector-emitter voltage and 100 mA continuous current ratings exceed the maximum load conditions of the target application.

Part Context

The TDTC143Z belongs to the TDTC series of built-in bias resistor transistors from Toshiba. These devices are designed to replace discrete resistor-transistor combinations, simplifying PCB layout. The 'DTC' suffix indicates a Digital Transistor with Built-in Bias Resistors. This specific model provides an NPN configuration with a fixed internal resistor ratio, widely used in general-purpose electronic equipment.

Replacement Considerations

The TDTA143Z serves as the complementary PNP counterpart within the same Toshiba family. Cross-manufacturer replacements require matching the SOT-23 package, 50 V VCEO rating, 100 mA IC rating, and approximately 4.7 kΩ input resistance. Verify pinout compatibility and hFE/gain characteristics before substitution.