PBLS4001D,115

Overview

The PBLS4001D is a dual-transistor component in an SOT457 (SC-74) package, integrating a PNP low VCEsat Breakthrough In Small Signal (BISS) transistor and an NPN Resistor-Equipped Transistor (RET). The PNP section supports a collector-emitter voltage of -40 V and a continuous collector current of -1 A. Its saturation resistance is typically 240 mΩ at -500 mA. The NPN section features a 50 V collector-emitter voltage rating, 100 mA output current capability, and an integrated bias resistor with a typical value of 2.2 kΩ.

Feature Summary

• Combines a low saturation voltage PNP BISS transistor and an NPN RET within a single compact surface-mount package to reduce component count.
• Offers a lower threshold voltage compared to MOSFETs, requiring minimal drive power for switching operations.
• Provides a space-saving solution suitable for portable equipment and high-side switching applications.

Applications

• Supply line switches
• Battery charger switches
• High-side switches for LEDs, drivers, and backlights
• Portable equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to confirm packing methods and tape-and-reel specifications. Ensure the procurement documentation references the correct product status as a production device. Cross-check the marking code 'R1' on received components to validate authenticity and traceability against the official datasheet revision history.

Selection Notes

Select this component when a combined load switch and driver function is required in a limited board area. The PNP BISS transistor is appropriate for low-loss switching where saturation voltage is critical. The integrated NPN RET simplifies circuit design by eliminating external biasing resistors. Verify that the thermal resistance characteristics meet the application's power dissipation requirements under the expected ambient conditions.

Part Context

This device belongs to NXP's portfolio of small-signal transistors designed for surface-mount technology. It utilizes the SOT457 plastic package, which is also known as SC-74. The integration of distinct transistor types with different electrical characteristics into one footprint addresses the industry trend toward miniaturization and reduced bill-of-materials complexity in consumer electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate potential replacements based on matching pin configurations, voltage ratings, and package dimensions only if official substitution data is verified from manufacturer sources.

FAQ

What is the function of the internal resistor in the NPN section?

The NPN section includes an integrated bias resistor (R1) with a typical value of 2.2 kΩ, which eliminates the need for an external resistor in driving applications.

How does the PNP transistor's threshold compare to MOSFETs?

The PNP BISS transistor has a low threshold voltage of less than 1 V, which is lower than typical MOSFET thresholds, allowing for easier drive control.

What is the maximum peak collector current for the PNP transistor?

The PNP transistor can handle a peak collector current of -2 A for single pulses with a duration of 1 ms or less.