Nexperia USA Inc. PBSS4220PANSX

Overview

PBSS4220PANSX from Nexperia is a dual NPN low V_CE(sat) BISS transistor in a thermally enhanced DFN2020D-6 (SOT1118D) package, designed for high-efficiency load switching in space-constrained automotive and portable power systems. It delivers 2 A continuous collector current per transistor, 20 V V_CEO, 170 mΩ R_CE(sat) at 1 A/50 mA drive, and AEC-Q101 qualification for under-hood use.

For engineers reviewing the PBSS4220PANSX datasheet, PBSS4220PANSX pinout, PBSS4220PANSX application, or PBSS4220PANSX equivalent, this device is selected for high-current, low-loss discrete switching where thermal performance, AOI compatibility, and dual-transistor integration reduce PCB area and bill-of-materials count.

Technical Context

This dual NPN BISS transistor integrates two matched low-saturation transistors sharing a common thermal die in a leadless 2 mm × 2 mm × 0.65 mm DFN package with exposed copper pads for direct heat sinking. Each transistor operates independently with isolated base-emitter-collector terminals and supports pulsed I_C up to 3 A.

Its BISS architecture enables high h_FE (150–260 at 2 A) while maintaining ultra-low V_CE(sat) (240–320 mV at 2 A/200 mA), reducing conduction loss and enabling operation without external heatsinking in FR4 PCB layouts with 4-layer copper or 1 cm² collector pad.

Key Specifications

Pinout & Package

DFN2020D-6 (SOT1118D) is a 2 mm × 2 mm × 0.65 mm leadless plastic package with six solderable side terminals and an exposed thermal pad (not electrically connected). The package provides low thermal resistance and supports AOI inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual NPN low V_CE(sat) transistor applications.

Compared with PBSS4220PANSX, the PBSS5220PAPS offers symmetrical PNP functionality for complementary switching but cannot replace it directly in low-side configurations; the identical marking variant provides lot-level traceability without electrical or mechanical change.

Availability

PBSS4220PANSX is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power delivery systems, industrial battery management, and smart LED lighting requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PBSS4220PANSX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified small-signal transistors and advanced packaging.

The PBSS4220PANSX belongs to Nexperia's BISS transistor family, engineered specifically for high-current, low-loss switching in automotive and portable power applications where thermal efficiency and board space reduction are critical.

FAQ

What is the maximum continuous current per transistor in PBSS4220PANSX?

The PBSS4220PANSX supports 2 A continuous collector current (I_C) per transistor at T_amb ≤ 25 °C with appropriate PCB thermal design. Derating applies above 25 °C ambient, with full 2 A capability maintained up to ~70 °C on 4-layer FR4 with 1 cm² collector pad per transistor.

Can PBSS4220PANSX replace a single SO-8 dual transistor in existing designs?

Yes-the DFN2020D-6 footprint (2 mm × 2 mm) is significantly smaller than SO-8 (4.9 mm × 6 mm), but requires re-layout due to different pinout and side-terminal soldering. Thermal performance is superior with proper copper pour, and AOI compatibility improves manufacturing yield versus gull-wing leads.

Is the exposed pad on PBSS4220PANSX electrically connected?

No-the exposed thermal pad in the DFN2020D-6 package is not electrically connected to any internal terminal. It must be soldered to a large copper pour for thermal conduction but may remain floating or grounded per system EMC requirements without affecting device operation.

Does PBSS4220PANSX support synchronous switching of both transistors?

Yes-both transistors share the same die and thermal environment, enabling tightly matched switching characteristics (t_on, t_off, V_CE(sat)). Independent base control (B1/B2) allows synchronous, anti-phase, or staggered drive-critical for minimizing shoot-through in H-bridge or dual-load configurations.