PBSS5255PAPSX

Overview

The PBSS5255PAPSX is a PNP/PNP low VCEsat Breakthrough In Small Signal (BISS) double transistor manufactured by Nexperia. It is housed in a leadless DFN2020D-6 (SOT1118D) surface-mount package with visible and solderable side pads. The device supports a collector-emitter voltage of -55 V and a continuous collector current of -2 A, with a peak pulse current capability of -3 A. Key electrical parameters include a maximum collector-emitter saturation voltage of -420 mV at -0.7 A collector current and -7 mA base current. The DC current gain is specified as a minimum of 110 at -1 A collector current and -2 V collector-emitter voltage. The transition frequency is rated at 100 MHz, and the total power dissipation reaches 960 mW under specific PCB mounting conditions.

Feature Summary

• Very low collector-emitter saturation voltage for high energy efficiency
• High collector current capability with elevated current gain at high load currents
• Exposed heat sink providing excellent thermal and electrical conductivity
• Suitable for automatic optical inspection due to visible and solderable side pads

Applications

• Load switch circuits
• Battery-driven devices
• Power management systems
• Charging circuits
• LED lighting applications

Procurement Notes

Verify that the specific part number matches the required automotive or non-automotive qualification status, as Nexperia distinguishes between qualified and standard versions. Confirm the package variant corresponds to the DFN2020D-6 specification with side-wettable flanks. Ensure the ordering suffix aligns with the desired reel or cut tape packaging format provided by the distributor.

Selection Notes

Select this component when low saturation voltage is critical for minimizing power loss in switching applications. The dual PNP configuration allows for compact designs requiring two matched transistors. Consider the thermal resistance values based on the intended PCB copper layer count and footprint size to ensure junction temperatures remain within the 150 °C limit during operation.

Part Context

This device belongs to the BISS (Breakthrough In Small Signal) transistor family from Nexperia, designed to offer improved performance over standard small-signal transistors. The PBSS5255 series specifically targets applications demanding high current handling in a minimal footprint. The DFN2020D-6 package provides a thermally enhanced solution compared to traditional plastic packages, facilitating better heat dissipation for medium-power requirements.

Replacement Considerations

For automotive-grade requirements, consult Nexperia for qualified alternatives, as the PBSS5255PAPS is explicitly noted as non-automotive qualified in the revision history. Direct pin-compatible replacements should be verified against the DFN2020D-6 outline dimensions and electrical characteristics to ensure functional equivalence in existing layouts.