PDTC143ZS,126

Overview

The PDTC143ZS is an NPN resistor-equipped transistor from the PDTC143Z series, manufactured by NXP USA Inc. It integrates a base bias resistor (R1) of 4.7 kΩ and an emitter bias resistor (R2) of 47 kΩ within a single component. The device operates with a collector-emitter voltage (VCEO) of up to 50 V and supports a DC output current (IO) of 100 mA. It utilizes a plastic single-ended leaded through-hole package designated as SOT54 (TO-92). Key electrical characteristics include a DC current gain (hFE) of at least 100 at IC = 10 mA and VCE = 5 V, and a total power dissipation of 500 mW at an ambient temperature of 25 °C.

Feature Summary

• Built-in bias resistors simplify circuit design and reduce component count
• Reduces pick and place costs for manufacturing processes
• Single-component solution for general purpose switching and amplification

Applications

• General purpose switching and amplification
• Inverter and interface circuits
• Circuit driver applications

Procurement Notes

Verify the manufacturer origin code associated with the ordering suffix, as production locations vary between Hong Kong, Malaysia, and China. Confirm that the specific batch corresponds to the SOT54 (TO-92) package variant rather than surface-mount alternatives like SOT23 or SOT323. Ensure compatibility with standard through-hole mounting techniques during assembly planning.

Selection Notes

Select this component when a compact NPN switching solution with integrated biasing is required for through-hole designs. The fixed R1/R2 ratio of approximately 1:10 suits standard logic interface levels. Consider thermal derating if operating above 25 °C, as the total power dissipation decreases significantly in enclosed environments compared to free-air conditions.

Part Context

This part belongs to the PDTC143Z series of NPN resistor-equipped transistors. It serves as the through-hole equivalent to surface-mount variants such as the PDTC143ZE (SOT416), PDTC143ZK (SOT346), and PDTC143ZT (SOT23). The PNP complement for this series is the PDTA143ZS, which shares identical packaging and pinout configurations.

Replacement Considerations

Direct functional substitutes within the same series include other PDTC143Z package variants if board layout permits, such as PDTC143ZE or PDTC143ZK. For PNP requirements, the PDTA143ZS is the complementary match. Verify pinout orientation carefully when replacing surface-mount types with this through-hole package.