PIMN31PAX

Overview

The PIMN31PAX is a NPN/NPN Resistor-Equipped double Transistor (RET) manufactured by Nexperia. It integrates two NPN transistors with built-in bias resistors in a DFN2020-6 (SOT1118) leadless surface-mount package. The device supports a collector-emitter voltage of 50 V and an output current of 500 mA per transistor. Internal resistors are specified as R1 = 1 kΩ and R2 = 10 kΩ, yielding a ratio of 10. Key electrical characteristics include a DC current gain (hFE) of 70 at 50 mA, a transition frequency of 210 MHz, and a collector-emitter saturation voltage of 100 mV at 50 mA.

Feature Summary

• Integrates dual NPN transistors with fixed internal bias resistors to simplify circuit topology.
• Provides 500 mA output current capability within a compact, leadless thermal-enhanced plastic package.
• Reduces component count and pick-and-place costs compared to discrete resistor-transistor combinations.

Applications

• Digital logic applications requiring signal buffering or level shifting.
• Cost-effective alternative to BC817 series components in digital circuits.
• Control interfaces for integrated circuit inputs.
• Load switching operations in low-power systems.

Procurement Notes

Verify the ordering suffix 'X' against the manufacturer's official documentation to confirm reel packaging specifications. Ensure the part number matches the DFN2020-6 package variant. Cross-reference the marking code '8J' on received units to validate authenticity. Confirm RoHS compliance status through the latest product data sheet revision before finalizing procurement orders.

Selection Notes

Select this component when a dual NPN configuration with integrated base resistors is required to minimize board space. The 1 kΩ input resistor suits standard logic drive levels, while the 10 kΩ feedback resistor aids in stable switching. Verify that the 50 V collector-emitter voltage rating exceeds the maximum operating voltage of the target application circuit.

Part Context

The PIMN31PA belongs to Nexperia’s portfolio of Resistor-Equipped Transistors (RETs). It serves as the NPN/NPN complement to the PIMP31PA (PNP/PNP) and PIMC31PA (NPN/PNP). This family is designed to replace multiple discrete components, offering a standardized solution for digital switching and interface control applications in consumer and industrial electronics.

Replacement Considerations

Direct functional equivalents include the PIMP31PA for PNP/PNP configurations and the PIMC31PA for NPN/PNP pairs. Verify pinout compatibility and thermal resistance requirements when substituting with other RET families. Ensure the replacement device maintains the same 1 kΩ/10 kΩ resistor ratio if circuit biasing remains unchanged.

FAQ

What are the specific values of the built-in resistors?

The device contains a bias resistor R1 of 1 kΩ and a bias resistor ratio R2/R1 of 10, resulting in an effective R2 value of approximately 10 kΩ.

What is the maximum collector-emitter voltage rating?

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

How does the package type affect thermal performance?

The DFN2020-6 package provides a thermal resistance from junction to ambient ranging from 125 K/W to 348 K/W depending on the PCB copper layer configuration and footprint size.