Nexperia USA Inc. PBSS5540Z/ZLX

Overview

PBSS5540Z from Nexperia is a 40 V, −5 A PNP low V_CEsat transistor in SOT223 (SC-73) package, optimized for high-current switching with 55 mΩ typical R_CEsat at −2 A/−200 mA drive. It serves as a robust power switch in battery management, DC/DC converters, and MOSFET driver stages where thermal efficiency and low conduction loss are critical.

For engineers reviewing the PBSS5540Z datasheet, PBSS5540Z pinout, PBSS5540Z application, or PBSS5540Z equivalent, key selection criteria include verified −40 V V_CEO, −10 A I_CM, junction temperature rating up to 150 °C, thermal resistance of 62 K/W on 6 cm² copper, and confirmed SOT223 pin configuration with dual collector leads.

Technical Context

This PNP bipolar transistor operates in saturation mode for efficient low-side or high-side switching, with guaranteed V_CEsat ≤ −375 mV at −5 A/−500 mA drive and h_FE = 50–150 under pulsed conditions. Its dual-collector SOT223 layout enhances thermal dissipation and current handling beyond standard SOT223 devices.

The device features low leakage (I_CBO ≤ −50 µA at T_j = 150 °C), stable gain across −55 °C to 150 °C, and f_T = 60–120 MHz-enabling use in fast-switching DC/DC control loops and strobe timing circuits requiring predictable turn-on/off behavior.

Key Specifications

Pinout & Package

SOT223 (SC-73) plastic surface-mount package with 4 leads, 2.3 mm pitch, 6.5 mm × 3.5 mm × 1.65 mm body, and integrated heatsink pad on collector terminals (pins 2 and 4).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP low-V_CEsat transistor applications.

Compared with NSS40501UW3T1G and DXT55500QE-13, PBSS5540Z delivers superior thermal performance via dual-collector SOT223 construction and lowest R_CEsat, making it optimal for high-reliability, high-current industrial switching where junction temperature control is critical.

Availability

PBSS5540Z is available at Aetrix Electronics and suitable for battery management systems, DC/DC converter control, and MOSFET driver applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for PBSS5540Z 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 essential semiconductors, delivering high-performance, reliable components for automotive, industrial, mobile, and computing markets.

The PBSS5540Z belongs to Nexperia's Low V_CEsat Transistor product line, engineered specifically for high-efficiency power switching in portable and thermally constrained applications where conduction loss and thermal management dominate design trade-offs.

FAQ

What is the maximum continuous collector current for PBSS5540Z at 25 °C ambient?

The PBSS5540Z is rated for −5 A continuous collector current at T_amb ≤ 25 °C with a 6 cm² copper pad per the datasheet's limiting values table. Derating is required above 25 °C ambient, following the thermal resistance curve (R_th(j-a) = 62 K/W) and maximum junction temperature limit of 150 °C.

Does PBSS5540Z have automotive qualification?

No. The PBSS5540Z is explicitly marked as non-automotive qualified in its revision history (v.4, April 2023). Nexperia states that automotive alternatives are available under the −Q suffix (e.g., PBSS5540Z-Q), which undergo AEC-Q101 stress testing and are intended for vehicle applications.

How does the dual-collector SOT223 configuration improve thermal performance?

The dual-collector layout (pins 2 and 4) reduces total package resistance and spreads heat across two solder pads, lowering effective R_th(j-a) to 62 K/W on 6 cm² copper. This configuration allows 33% higher power dissipation versus single-collector equivalents under identical PCB layout conditions, verified in Nexperia's thermal characterization data.

Can PBSS5540Z replace standard PNP transistors like BC807 in existing designs?

Only with careful validation. While pin-compatible in SOT223, PBSS5540Z has significantly lower V_CEsat and higher current capability but also different h_FE profile and faster switching. Base drive circuitry must be re-evaluated to avoid overdrive or insufficient saturation, especially at >1 A loads where BC807 would be out of specification.