Nexperia USA Inc. PBSS4240DPN,115

Overview

PBSS4240DPN from Nexperia is a dual NPN/PNP low V_CE(sat) transistor pair in SOT457 (SC-74) package, designed for complementary switching in power management and motor drive circuits. It delivers 40 V V_CEO, 1.35 A NPN / −1.1 A PNP DC collector current, and ultra-low saturation voltages down to 60 mV (NPN, I_C = 100 mA) and −90 mV (PNP, I_C = −100 mA), enabling high-efficiency dual-rail control in compact PCB layouts.

For engineers reviewing the PBSS4240DPN datasheet, PBSS4240DPN pinout, PBSS4240DPN application, or PBSS4240DPN equivalent, this device is selected for its verified low R_CE(sat) (200 mΩ NPN / 260 mΩ PNP), high h_FE at 1 A (200 for NPN, 160 for PNP), and thermal performance (R_{th j-a} = 110 K/W with 1 cm² copper pad), critical for thermally constrained dual-transistor switching nodes.

Technical Context

The PBSS4240DPN integrates matched NPN and PNP transistors on a single die in a monolithic SOT457 package, sharing thermal coupling and enabling precise complementary biasing. Its low V_CE(sat) architecture relies on optimized epitaxial layer doping and emitter geometry to minimize conduction loss at high currents up to 2 A per transistor.

It operates with base-emitter turn-on voltage of 1.1 V (NPN) and −1.0 V (PNP) at I_C = 1 A, and supports pulsed operation up to I_CM = ±3 A (tp ≤ 10 ms, δ ≤ 20%), making it suitable for transient-heavy loads like stepper phase drivers and MOSFET gate switching.

Key Specifications

Pinout & Package

SOT457 (SC-74) plastic surface-mounted package with 6 leads, 1.1 mm height, 3.1 × 2.7 mm footprint, and integrated thermal pad for collector connections.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar complementary low-V_CE(sat) transistor pair applications.

Compared with DMN3026LSD-13 and ZXTD0905DE6TA, PBSS4240DPN uniquely combines 40 V rating, ±1.1 A capability, and sub-100 mV V_CE(sat) in a thermally optimized dual-transistor package-making it the only choice for robust, low-loss 24 V complementary switching without external level shifters or heatsinks.

Availability

PBSS4240DPN is available at Aetrix Electronics and suitable for power management, motor control, and peripheral driver applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for PBSS4240DPN 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 leader in high-volume discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.

PBSS4240DPN belongs to Nexperia's Low V_CE(sat) Transistor family, engineered specifically for high-efficiency, space-constrained switching in power conversion and motion control systems.

FAQ

What is the maximum continuous collector current for each transistor in PBSS4240DPN?

The NPN transistor supports 1.35 A DC collector current (I_C), while the PNP transistor supports −1.1 A DC collector current, both rated at T_amb ≤ 25 °C with a 1 cm² copper mounting pad. Derating applies above 25 °C ambient, following the R_{th j-a} = 110 K/W thermal resistance curve.

Can PBSS4240DPN be used in a half-bridge configuration without external flyback diodes?

No-PBSS4240DPN lacks integrated body diodes or clamping structures. External fast-recovery diodes must be placed across each collector-emitter junction to handle inductive kickback in motor or relay switching applications, especially when operating above 100 kHz PWM frequencies.

How does the thermal coupling between the NPN and PNP transistors affect circuit performance?

The monolithic SOT457 construction ensures tight thermal coupling, causing junction temperatures to track within ±2 °C under matched load conditions. This improves current balance in complementary stages and prevents thermal runaway during asymmetric loading, but requires careful PCB copper balancing to avoid localized hot spots.

Is PBSS4240DPN qualified for automotive applications per AEC-Q101?

No-PBSS4240DPN is not AEC-Q101 qualified. It is rated for industrial temperature range (−65 °C to +150 °C) and intended for commercial/industrial use. For automotive designs, Nexperia's PBSS4240DPN-Q variant (with full AEC-Q101 stress testing and PPAP documentation) must be specified.