PDTC124XS,126

Overview

The PDTC124XS,126 is an NPN Resistor-Equipped Transistor (RET) from the PDTC124X series manufactured by Nexperia. It integrates bias resistors R1 and R2 with nominal values of 22 kΩ and 47 kΩ respectively. The device operates with a collector-emitter voltage (VCEO) of 50 V and supports an output current (IO) of up to 100 mA. It utilizes the SOT54 package (SC-43A), a plastic single-ended leaded through-hole configuration. Key electrical characteristics include a DC current gain (hFE) minimum of 80 at IC = 5 mA and a total power dissipation (Ptot) of 500 mW at Tamb ≤ 25 °C.

Feature Summary

• Integrates built-in bias resistors to reduce component count and simplify circuit design.
• Reduces pick and place costs associated with discrete resistor assembly.
• Suitable for general-purpose switching and amplification applications.

Applications

• General-purpose switching
• Amplification circuits
• Circuit drivers
• Inverter and interface circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product database to confirm availability and exact packing method. The datasheet indicates that the -126 suffix corresponds to tape ammopack in wide pitch for the SOT54 package. Confirm compliance requirements such as RoHS status and ensure the selected packaging aligns with automated assembly or manual insertion needs.

Selection Notes

Select this component when a compact NPN transistor solution with integrated base biasing is required for through-hole designs. The SOT54 package is appropriate for applications where surface-mount options are unsuitable. Ensure the input voltage does not exceed 40 V and verify thermal constraints, as the maximum junction temperature is 150 °C. Compare against other RET variants if different resistance ratios or package types like SOT23 are preferred.

Part Context

The PDTC124XS belongs to the broader PDTC124X family of NPN resistor-equipped transistors. This family includes various packages such as SOT23, SOT323, and SOT416, all sharing similar electrical characteristics but differing in physical form factors. The PDTC124XS specifically addresses through-hole mounting requirements using the SC-43A standard, offering a direct complement to the PDTA124XS PNP variant within the same series.

Replacement Considerations

Direct functional equivalents within the same series include PDTC124XE, PDTC124XT, and PDTC124XU, provided the package type change is acceptable. For through-hole replacements, verify pinout compatibility between SOT54 and other TO-92 style packages. Cross-reference with PDTA124XS only if a PNP configuration is required instead of NPN.

FAQ

What are the nominal values of the internal bias resistors?

The internal bias resistors have nominal values of R1 = 22 kΩ (input/base) and R2 = 47 kΩ (emitter/base).

What is the maximum collector-emitter voltage for this device?

The maximum collector-emitter voltage (VCEO) with an open base is 50 V.

Which package type does the PDTC124XS utilize?

The PDTC124XS uses the SOT54 package, which is described as a plastic single-ended leaded (through-hole) package with 3 leads, also known as SC-43A or TO-92.