Nexperia USA Inc. PBSS302NZ,135

Overview

PBSS302NZ from Nexperia is an NPN low V_CE(sat) transistor in SOT223 (SC-73) package, designed for high-efficiency switching in power-constrained applications. It delivers 5.8 A continuous collector current, 20 V V_CEO, and typ. 30 mΩ R_CE(sat) at 4 A/200 mA drive - enabling compact DC-DC converters and MOSFET gate drivers with minimal conduction loss.

For engineers reviewing the PBSS302NZ datasheet, PBSS302NZ pinout, PBSS302NZ application, or PBSS302NZ equivalent, this page provides verified electrical parameters, thermal derating curves, switching timing data (t_on = 55 ns, t_off = 335 ns), package footprint details, and validated alternatives for high-current, low-saturation-voltage bipolar switching roles.

Technical Context

This device operates as a high-gain, low-saturation-voltage NPN switch optimized for pulsed and continuous conduction in medium-power linear and switching topologies. Its h_FE ranges from 200–350 at I_C = 7 A, and V_CE(sat) remains ≤250 mV up to 5.8 A with 290 mA base drive - confirming robust saturation under high-current load conditions.

Thermal performance is defined across three mounting configurations: R_th(j-a) = 179 K/W (FR4 standard), 74 K/W (FR4 with 6 cm² collector pad), and 63 K/W (ceramic Al₂O₃). Junction-to-solder-point resistance is 15 K/W, supporting direct thermal coupling to PCB copper for sustained 1.7 W dissipation.

Key Specifications

Pinout & Package

SOT223 (SC-73) surface-mount plastic package with 4 leads, 2.3 mm pitch, and integrated heatsink tab (lead 4 is collector, electrically tied to lead 2). Dimensions: 6.5 mm × 3.5 mm × 1.65 mm body; thermal pad optimized for soldered copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PBSS302NZ, NSS30201MR6T1G trades 1.3 A current capacity and 15 mΩ R_CE(sat) for smaller die size, while DXT3020P5-13 offers comparable R_CE(sat) but reduced gain margin - making PBSS302NZ optimal for thermally demanding, high-precision current switching where both low loss and consistent h_FE are required.

Availability

PBSS302NZ is available at Aetrix Electronics and suitable for DC-DC conversion, MOSFET gate driving, and charging circuits requiring stable component supply, long-term manufacturability, and traceable sourcing for industrial and embedded OEM programs.

Supply support for PBSS302NZ 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 and industrial-grade components.

PBSS302NZ belongs to Nexperia's "Low V_CE(sat) Transistor" product line, engineered specifically for efficiency-critical power switching in consumer, industrial, and computing applications where thermal density and conduction loss dominate design constraints.

FAQ

What is the maximum allowable base current for PBSS302NZ?

The datasheet specifies I_B = 290 mA for full saturation at I_C = 5.8 A. Absolute maximum base current is not explicitly rated, but I_B must remain within the safe operating area defined by P_tot limits and thermal resistance. At 25 °C ambient, 290 mA is well within thermal capability when using the collector pad for heat dissipation.

Can PBSS302NZ replace a MOSFET in low-side switching applications?

Yes - it functions effectively as a low-side switch up to 5.8 A with fast turn-on/turn-off times. However, unlike MOSFETs, it requires continuous base current drive and exhibits V_CE(sat) rather than R_DS(on). Use is preferred where bipolar gain simplifies drive circuitry or where cost and footprint favor SOT223 over SO-8 MOSFETs.

Is PBSS302NZ qualified for automotive applications?

No. Per Revision History v.4 (20241008), PBSS302NZ was changed to non-automotive qualification. Nexperia offers automotive-qualified alternatives (e.g., PBSS302NZ-Q) with AEC-Q101 testing and extended temperature validation - these must be selected for vehicle-mounted systems.

How does PCB layout affect PBSS302NZ's thermal performance?

Thermal resistance varies significantly with layout: R_th(j-a) drops from 179 K/W (standard FR4) to 63 K/W (ceramic Al₂O₃) or 74 K/W (FR4 with 6 cm² collector pad). To achieve rated 2 W dissipation, the collector pad (pins 2 and 4) must be connected to ≥6 cm² of 2 oz copper with multiple thermal vias - otherwise derating below 1.7 W is required.