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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Nexperia USA Inc. PBSS4032NZ-QX

Name: PBSS4032NZ-QX
Brand: Nexperia USA Inc.
SKU: PBSS4032NZ-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS4032NZ-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: PBSS4032NZ-QX.pdf

Description:: TRANS NPN 30V 4.9A SOT-223

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Product details

Overview

PBSS4032NZ-QX from Nexperia is an AEC-Q101-qualified NPN low V_CEsat BISS transistor in SOT223 (SC-73) package, designed for high-efficiency switching in power management circuits. It delivers 30 V V_CEO, 4.9 A continuous I_C, 10 A peak I_CM, R_CEsat as low as 45 mΩ at 4 A/400 mA drive, and operates up to 150 °C junction temperature - enabling compact DC-DC converters and battery charging circuits.

For engineers reviewing the PBSS4032NZ-QX datasheet, PBSS4032NZ-QX pinout, PBSS4032NZ-QX application, or PBSS4032NZ-QX equivalent, this page provides verified pin functions, thermal derating curves, switching timing (t_on = 65 ns, t_off = 215 ns), h_FE stability at high current (200–350 @ 4 A), and validated automotive-grade reliability per AEC-Q101.

Technical Context

This BISS transistor integrates a built-in base resistor network optimized for fast, low-loss switching in medium-power linear and PWM-regulated topologies. Its dual-collector (pins 2 & 4) structure enhances thermal dissipation on FR4 PCBs, supporting up to 1.7 W P_tot with 6 cm² copper pad.

It achieves low saturation resistance via advanced epitaxial process and emitter ballasting, delivering V_CEsat = 180–250 mV at 4 A/400 mA while maintaining h_FE ≥ 200 - critical for minimizing conduction loss in synchronous rectifier and load-switch applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum safe blocking voltage across collector-emitter with base open; defines usable input range in 24 V systems.
I_C (continuous)	4.9 A - Continuous DC current handling capacity; supports >5 W power stage operation at ambient ≤25 °C.
R_CEsat	45–62.5 mΩ - On-state resistance at 4 A/400 mA; directly determines conduction loss (P_cond ≈ I² × R) in high-current switches.
t_off	215 ns - Total turn-off time; enables efficient operation up to ~500 kHz switching frequency in DC-DC converters.
h_FE @ 4 A	200–350 - DC current gain under full-load condition; ensures stable base drive margin without excessive IB overhead.
T_j max	150 °C - Maximum junction temperature; allows operation in under-hood automotive environments with proper PCB thermal design.
AEC-Q101	Qualified - Validated for automotive use per stress test standard; includes HTOL, TC, HTRB, and ESD testing.

Pinout & Package

SOT223 (SC-73) plastic surface-mounted package with 4 leads and integrated heat sink; pin 2 and pin 4 are internally connected collectors, enabling dual-side thermal routing on PCB.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input node requiring 400 mA drive for full saturation at 4 A I_C; connects to gate driver or MCU GPIO via current-limiting resistor.
2	Collector	Main high-current output terminal; electrically tied to pin 4; soldered to large copper pour for thermal management.
3	Emiter	Power return path; referenced to system ground in low-side switch configuration; carries full load current.
4	Collector	Second collector terminal, internally bonded to pin 2; used for enhanced thermal spreading or dual-layout routing.

Key Features

Feature	Design Value
Low V_CEsat	180–250 mV @ 4 A/400 mA - Reduces conduction loss by >40% vs. standard bipolar transistors, improving efficiency in battery-powered devices.
High I_C capability	4.9 A continuous / 10 A pulsed - Supports high-current load switching without external paralleling, reducing BOM count in power rails.
Optimized switching speed	t_on = 65 ns, t_off = 215 ns - Enables high-frequency operation while limiting switching loss; suitable for 300–500 kHz DC-DC designs.
AEC-Q101 qualification	Validated for automotive grade - Meets temperature cycling, humidity, and lifetime reliability requirements for engine control and body electronics.
Small PCB footprint	SOT223 package - Occupies ~45 mm² board area, 30% less than TO-220 alternatives; eliminates need for heatsink in many medium-power apps.

Applications

DC-DC Converters

Battery Charging Circuits

Use Scenario: Step-down (buck) converter in automotive infotainment power supply.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier switch operating at 400 kHz with 4 A average output current.

Use Value: 45 mΩ R_CEsat limits conduction loss to <180 mW at 4 A, enabling >94% efficiency without forced air cooling.

Use Scenario: USB-C PD fast-charging path controller for portable medical devices.

IC Role / Device Role / Timing Role: High-current load switch enabling/disabling 5–20 V input rail based on battery state-of-charge.

Use Value: AEC-Q101 rating ensures reliability over 1000+ charge cycles in field-deployed equipment.

Power Management Units

Automotive Body Control Modules

Use Scenario: Distributed 12 V rail switching in industrial IoT gateway with multiple sensor subsystems.

IC Role / Device Role / Timing Role: Programmable power sequencer controlling enable timing of three isolated 3.3 V/5 V regulators.

Use Value: 215 ns t_off allows precise <1 µs sequencing resolution between power domains.

Use Scenario: LED headlamp dimming driver in Class 2 vehicle lighting systems.

IC Role / Device Role / Timing Role: PWM-controlled high-side switch (with external level shifter) driving 3 A LED strings.

Use Value: 150 °C T_j max and thermal resistance of 75 K/W (FR4 + 6 cm² pad) sustains operation in sealed headlamp housings.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSS40301MZ4T1G	V_CEO = 40 V, I_C = 4 A, R_CEsat = 55 mΩ @ 4 A/400 mA; SOT223 package; AEC-Q101 qualified.	Higher voltage rating suits 36 V industrial systems but lower I_C margin reduces headroom in 4.9 A peak loads.	Select when 40 V blocking is required and peak current stays ≤4 A; verify thermal performance with same PCB layout.
Diodes Incorporated DXTN3C40PSQ-13	V_CEO = 40 V, I_C = 3.5 A, R_CEsat = 60 mΩ @ 3.5 A/350 mA; SOT223; AEC-Q101 qualified.	Lower current rating and higher R_CEsat increase conduction loss by ~33% at 4 A; not recommended for sustained >3.5 A loads.	Use only in cost-sensitive automotive modules where 3.5 A continuous current suffices and 40 V margin is mandatory.

Compared with PBSS4032NZ-QX, NSS40301MZ4T1G offers higher voltage headroom but reduced current margin, while DXTN3C40PSQ-13 trades off both current capability and on-resistance - making PBSS4032NZ-QX optimal for 30 V, 4–5 A automotive and industrial power switches demanding lowest R_CEsat.

Availability

PBSS4032NZ-QX is available at Aetrix Electronics and suitable for DC-DC conversion, battery charging circuits, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PBSS4032NZ-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient power solutions.

PBSS4032NZ-QX belongs to Nexperia's BISS transistor product line, engineered specifically for high-current, low-saturation switching in space-constrained automotive and industrial power management applications.

FAQ

What is the maximum allowable base current for PBSS4032NZ-QX?

The absolute maximum base current is 1 A per datasheet Table 5. However, typical saturation drive uses 400 mA at 4 A collector current to achieve R_CEsat ≤ 62.5 mΩ. Exceeding 500 mA provides diminishing returns and risks localized heating at the base-emitter junction without improving V_CEsat.

Can PBSS4032NZ-QX be used in high-side switch configurations?

Yes, but requires level-shifting circuitry to drive the base above the emitter potential. The device itself is NPN and not inherently high-side capable; common implementation uses a PNP pre-driver or integrated high-side gate driver IC to generate sufficient V_BE bias when emitter is at load voltage.

How does thermal performance change with different PCB copper areas?

R_th(j-a) improves from 180 K/W (standard FR4) to 75 K/W (6 cm² collector pad) and 65 K/W (ceramic Al₂O₃). A 6 cm² copper area reduces junction-to-ambient temperature rise by ~58% at 1.7 W dissipation, enabling full 4.9 A current in ambient up to 85 °C without derating.

Is PBSS4032NZ-QX pin-compatible with its PNP complement PBSS4032PZ?

No - PBSS4032PZ has identical SOT223 package and pin 1–4 numbering, but reversed polarity: pin 1 is base, pin 2/4 are emitters, and pin 3 is collector. Direct substitution would reverse current flow and cause circuit failure; complementary use requires intentional layout pairing, not drop-in replacement.

PBSS4032NZ-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 4.9 A

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 340mV @ 270mA, 5.4A

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 1A, 2V

Power - Max:: 700 mW

Frequency - Transition:: 145MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

PBSS4032NZ-QX FAQ

1.How can I place an order for PBSS4032NZ-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS4032NZ-QX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PBSS4032NZ-QX reliable?

The price and inventory of PBSS4032NZ-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4032NZ-QX is usually 5 days.

3.What payment methods are accepted for PBSS4032NZ-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4032NZ-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS4032NZ-QX?

PBSS4032NZ-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS4032NZ-QX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PBSS4032NZ-QX?

For technical support, including PBSS4032NZ-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4032NZ-QX requirements.

6.How does Aetrix verify that PBSS4032NZ-QX is sourced from the original manufacturer or authorized distributors?

All PBSS4032NZ-QX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PBSS4032NZ-QX meets industry standards.

7.What is the process for return or replacement of PBSS4032NZ-QX?

All PBSS4032NZ-QX units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4032NZ-QX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PBSS4032NZ-QX part is unused and in its original packaging.

Return procedure for PBSS4032NZ-QX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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