PIMP31X

Overview

The PIMP31 is a PNP/PNP Resistor-Equipped double Transistor (RET) housed in an SOT457 (SC-74) surface-mounted plastic package. It features two integrated PNP transistors with built-in bias resistors, specifically R1 = 1 kΩ and R2 = 10 kΩ. The device supports a collector-emitter voltage of -50 V and an output current capability of -500 mA per transistor. Total power dissipation reaches 420 mW at 25 °C ambient temperature. Key electrical characteristics include a DC current gain (hFE) of 70 minimum at -50 mA, a transition frequency (fT) of 140 MHz typical, and a collector-emitter saturation voltage of -100 mV maximum under specified conditions.

Feature Summary

• Integrates dual PNP transistors with fixed internal bias resistors to reduce external component count
• Provides simplified circuit design by combining switching elements and base drive networks
• Offers reduced pick and place costs through compact SC-74 surface-mount packaging

Applications

• Digital logic applications requiring signal inversion or buffering
• Cost-saving alternative to discrete BC807 series transistors in digital circuits
• Control interfaces for IC inputs
• Load switching functions

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to ensure correct packaging configuration. Confirm RoHS compliance status and check for any recent Product Change Notifications that may affect marking codes or pin assignments. Always reference the latest official datasheet version for accurate thermal derating curves and absolute maximum ratings before finalizing procurement specifications.

Selection Notes

Select this component when a dual PNP configuration with predefined bias ratios is required in a small footprint. Ensure the application voltage does not exceed -50 V and current demands stay within the -500 mA limit. Consider the 1 kΩ input resistor value for appropriate drive current requirements from preceding logic stages. Verify thermal management capabilities if operating near the 420 mW total dissipation limit.

Part Context

The PIMP31 belongs to Nexperia's family of Resistor-Equipped Transistors (RETs). Its NPN/NPN complement is the PIMN31, while the mixed NPN/PNP variant is designated as the PIMC31. All variants share similar functional architectures but differ in transistor polarity configurations. This specific part number denotes the standard production version without automotive qualification markings.

Replacement Considerations

Direct functional substitutes include the PIMN31 for NPN/NPN applications and the PIMC31 for NPN/PNP combinations. Discrete BC807 pairs may serve as alternatives if board space permits increased component count. Verify pin compatibility and resistor values when replacing with generic RET families.