Nexperia USA Inc. PBHV9540Z-QX

Overview

PBHV9540Z-QX from Nexperia is a PNP high-voltage low V_CEsat transistor in SOT223 (SC-73) package, designed for automotive-grade switching in high-voltage DC chains. It delivers −500 V V_CESM, −0.5 A continuous I_C, and typ. −180 mV V_CEsat at I_C = −500 mA / I_B = −100 mA - enabling efficient LED chain drivers and SMPS primary-side control.

For engineers reviewing the PBHV9540Z-QX datasheet, PBHV9540Z-QX pinout, PBHV9540Z-QX application, or PBHV9540Z-QX equivalent, key selection criteria include verified AEC-Q101 qualification, thermal resistance R_th(j-sp) = 15 K/W on FR4 with extended collector pad, and confirmed low-saturation performance under pulsed high-current conditions (tp ≤ 300 µs, δ ≤ 0.02).

Technical Context

This device operates as a medium-power PNP bipolar junction transistor optimized for high-voltage switching where low conduction loss and robust thermal behavior are critical. Its architecture supports stable h_FE ≥ 80 at I_C = −300 mA and maintains V_CEsat < −210 mV even at elevated junction temperatures up to 150 °C.

The SOT223-4L package integrates dual collector terminals (Pins 2 & 4) to reduce current path resistance and improve power dissipation capability. Thermal design leverages a dedicated 6 cm² copper mounting pad, yielding R_th(j-sp) = 15 K/W - significantly lower than standard footprint derating (R_th(j-a) = 85 K/W).

Key Specifications

Pinout & Package

SOT223-4L (SC-73) plastic surface-mount package with 2.3 mm lead pitch, 6.5 mm × 3.5 mm × 1.65 mm body, and integrated thermal pad connected to dual collector terminals (Pins 2 & 4). Mounting requires tin-plated single-sided copper on FR4 with 6 cm² collector pad for rated power handling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage PNP switching applications.

Compared with PBHVA2040Z-Q and PHPT60303EQX, PBHV9540Z-QX uniquely balances −500 V blocking, −0.5 A current, and −180 mV V_CEsat - making it the only option among the three qualified for AEC-Q101 automotive switching at >100 kHz with sub-200 mV saturation.

Availability

PBHV9540Z-QX is available at Aetrix Electronics and suitable for automotive LED drivers, LCD backlighting modules, and industrial SMPS designs requiring stable component supply across multi-year production cycles.

Supply support for PBHV9540Z-QX 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 efficiency technologies, delivering high-performance discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

PBHV9540Z-QX belongs to Nexperia's AEC-Q101-qualified high-voltage bipolar transistor product line, engineered specifically for automotive lighting, motor control, and power conversion where low V_CEsat and thermal robustness are mandatory.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum junction temperature (T_j) is 150 °C, and continuous operation at this limit requires strict adherence to the derating curve in Figure 1 - specifically, mounting on FR4 with 6 cm² collector pad and ambient temperature ≤ 75 °C. Exceeding 150 °C risks permanent parametric shift and accelerated failure.

Can Pins 2 and 4 be used independently as separate collectors?

No - Pins 2 and 4 are internally connected to the same collector region and must be soldered to the same copper pour. Using them separately violates the thermal and current-sharing design, invalidates R_th(j-sp) = 15 K/W, and may cause localized overheating or premature failure under load.

Is PBHV9540Z-QX compatible with standard SOT223 reflow profiles?

Yes, it complies with J-STD-020D for moisture sensitivity level 1 and supports standard lead-free reflow profiles (peak 260 °C, 30 s max). The recommended footprint matches Figure 14: 4.6 mm × 2.3 mm solder land with 0.8 mm stencil aperture for optimal thermal pad wetting.

How does its h_FE vary with temperature and current?

h_FE decreases with rising temperature: min. 65 at I_C = −500 mA and T_j = 125 °C (Figure 4), but remains ≥100 at I_C = −50 mA and T_j = 25 °C. At −300 mA, h_FE is 80–145 across −55 °C to 100 °C, supporting stable biasing in wide-temperature automotive environments.