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

Nexperia USA Inc. PBSS4350X,147

Name: PBSS4350X,147
Brand: Nexperia USA Inc.
SKU: PBSS4350X,147
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS4350X,147

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: PBSS4350X,147.pdf

Description:: TRANS NPN 50V 3A SOT-89

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PBSS4350X,147 from Nexperia is an AEC-Q101-qualified NPN low V_CEsat transistor in SOT89 package, rated for 50 V V_CBO, 3 A continuous collector current, and 100–130 mΩ R_CEsat at I_C = 2 A / I_B = 200 mA. It serves as a high-efficiency switching element in automotive and industrial power stages, including DC/DC converter synchronous rectification and inductive load drivers.

For engineers reviewing the PBSS4350X,147 datasheet, PBSS4350X,147 pinout, PBSS4350X,147 application, or PBSS4350X,147 equivalent, key selection criteria include its low saturation resistance, thermal performance on FR4 PCBs with 1 cm² collector pad (R_th(j-a) = 125 K/W), AEC-Q101 qualification, and compatibility with 3.3 V/5 V base drive in low-voltage peripheral switching.

Technical Context

This device operates as a discrete NPN bipolar junction transistor optimized for saturated-switching applications. Its design emphasizes minimal conduction loss via ultra-low V_CEsat (≤370 mV at I_C = 3 A / I_B = 300 mA) and high current gain (h_FE ≥ 100 at I_C = 3 A), enabling efficient operation with modest base drive.

The SOT89 package integrates a thermally enhanced collector tab for direct PCB copper area coupling. Thermal resistance varies significantly with mounting: 225 K/W on standard FR4 footprint versus 80 K/W on ceramic PCB (7 cm²), confirming its dependency on board-level thermal design rather than intrinsic die limits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	50 V - Maximum reverse voltage between collector and base with emitter open; defines safe blocking capability in high-side switch configurations.
I_C	3 A continuous - Sustained collector current under T_amb ≤ 25 °C with standard FR4 layout; supports medium-power load switching without forced cooling.
R_CEsat	100–130 mΩ - Equivalent on-resistance in saturation; enables <100 mW conduction loss at 2 A, reducing thermal stress in compact layouts.
V_CEsat	≤370 mV at I_C = 3 A / I_B = 300 mA - Low saturation voltage ensures minimal voltage drop across switch, critical for battery-powered and low-V_IN systems.
h_FE	≥100 at I_C = 3 A - High DC current gain allows use of low-base-current drivers (e.g., microcontroller GPIO), simplifying gate/base drive circuitry.
T_j max	150 °C - Maximum junction temperature; sets thermal derating envelope-power dissipation drops to 1.4 W at 6 cm² FR4 copper and 1.6 W on ceramic PCB.

Pinout & Package

SOT89 (SC-62) plastic surface-mount package: 3-lead, 1.5 mm pitch, 4.5 mm × 2.5 mm × 1.5 mm body; collector tab forms exposed thermal pad on lead 2.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current return path; connected to ground or low-side reference; requires low-impedance trace routing to minimize switching noise coupling.
2	Collector	Main power output terminal; electrically and thermally tied to large copper pour; soldered directly to PCB thermal pad for heat extraction.
3	Base	Control input; driven by logic-level signal (e.g., MCU GPIO); requires series resistor to limit I_B and prevent overdrive during transients.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive ambient temperature range (−40 °C to +150 °C) and reliability stress tests-enables use in engine control, body electronics, and ADAS power stages.
Low R_CEsat (100–130 mΩ)	Reduces conduction losses by >40% vs. standard BJT alternatives, allowing smaller heatsinks or higher efficiency in space-constrained DC/DC modules.
High I_C/I_CM rating (3 A / 5 A)	Supports peak inrush currents in relay/motor drivers without secondary protection; eliminates need for parallel devices in ≤5 W load switching.
Thermally optimized SOT89	Collector tab enables direct thermal coupling to PCB copper-R_th(j-sp) = 16 K/W confirms efficient heat transfer from die to solder joint.

Applications

Automotive Power Management

DC/DC Converter Switching

Use Scenario: Load switching for HVAC actuators and lighting modules in 12 V vehicle electrical systems.

IC Role / Device Role / Timing Role: NPN low-side switch controlling 2–4 A resistive/inductive loads with PWM duty cycling up to 20 kHz.

Use Value: AEC-Q101 qualification and 150 °C T_j rating ensure operational reliability under under-hood thermal cycling and load dump transients.

Use Scenario: Synchronous rectifier in non-isolated buck converters powering infotainment SoCs.

IC Role / Device Role / Timing Role: Low-V_CEsat replacement for Schottky diodes in 5–12 V input, 3.3 V/2 A output stages.

Use Value: 100 mΩ R_CEsat cuts conduction loss by ~35% vs. 40 V/3 A Schottky, improving full-load efficiency from 89% to 92%.

Battery Charger Control

Inductive Load Driver

Use Scenario: Charge path enable switch in portable medical device Li-ion charger circuits.

IC Role / Device Role / Timing Role: Reverse-polarity and overcurrent protected main power FET driver stage with fast turn-on (<1 µs).

Use Value: V_CEsat ≤280 mV at 2 A ensures <0.6 °C self-heating rise on 1 cm² FR4 copper-maintains thermal stability during continuous 3-hour charge cycles.

Use Scenario: Relay coil driver in industrial PLC output modules handling 24 V DC solenoids.

IC Role / Device Role / Timing Role: Saturated switch providing 3 A pulsed current with flyback diode integration on PCB.

Use Value: 5 A I_CM withstands 10× inrush surge of 24 V/100 Ω relays; h_FE ≥100 allows direct drive from 3.3 V MCU with 10 kΩ base resistor.

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 NSS40501MUTBG	Same SOT89 package, 40 V V_CBO, 5 A I_C, but higher R_CEsat (150 mΩ typ) and no AEC-Q101 qualification.	Rated for commercial/industrial use only; unsuitable for automotive under-hood deployment.	Select when cost sensitivity outweighs automotive compliance and higher voltage margin is not required.
Diodes Incorporated DXTN3C40PSQ-13	40 V V_CBO, 3 A I_C, 120 mΩ R_CEsat, AEC-Q101 qualified, but uses SOT23-3 package with lower thermal capability (R_th(j-a) = 290 K/W).	Limited to ≤1 W continuous dissipation; unsuitable for sustained 3 A loads without active cooling.	Prefer for space-constrained PCBs where thermal load is <0.5 W and automotive qualification is mandatory.

Compared with NSS40501MUTBG and DXTN3C40PSQ-13, PBSS4350X,147 uniquely balances 50 V blocking, AEC-Q101 compliance, and SOT89 thermal performance-making it optimal for automotive 12 V/24 V power switching where voltage margin and board-level heat dissipation are both critical.

Availability

PBSS4350X,147 is available at Aetrix Electronics and suitable for automotive power management, DC/DC converter switching, and industrial inductive load driving requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PBSS4350X,147 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 specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient power solutions.

PBSS4350X,147 belongs to Nexperia's low V_CEsat BJT product line, engineered specifically for replacing MOSFETs and diodes in cost-sensitive, thermally constrained automotive and industrial power switches where bipolar simplicity and robustness are prioritized.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum base current is 0.5 A per datasheet limiting values. However, for reliable continuous operation at I_C = 3 A, the recommended base drive is 300 mA (I_C/I_B = 10), ensuring sufficient overdrive while maintaining thermal stability on standard FR4 PCBs with 1 cm² collector copper.

Can PBSS4350X,147 be used in linear regulator pass transistor applications?

No-it is optimized for saturated switching, not linear operation. Its Safe Operating Area (SOA) is not characterized for linear mode, and power dissipation exceeds 1.6 W beyond V_CE > 0.5 V at I_C = 3 A. Use dedicated linear pass transistors (e.g., BD139) for regulator applications.

How does thermal performance change with different PCB copper areas?

R_th(j-a) improves from 225 K/W (standard footprint) to 125 K/W (1 cm² collector pad), 90 K/W (6 cm²), and 80 K/W (ceramic PCB). This 2.8× reduction in thermal resistance directly enables 2.2× higher continuous power (from 0.56 W to 1.25 W) without exceeding T_j = 150 °C at T_amb = 70 °C.

Is the SOT89 package lead-free and RoHS compliant?

Yes-PBSS4350X,147 is manufactured using lead-free solderable terminations and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The device marking "S43" and packaging code "147" confirm standard RoHS-compliant reel packaging per Nexperia's quality documentation.

PBSS4350X,147 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 3 A

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 370mV @ 300mA, 3A

Current - Collector Cutoff (Max):: 100nA (ICBO)

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

Power - Max:: 1.6 W

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

PBSS4350X,147 FAQ

1.How can I place an order for PBSS4350X,147 through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS4350X,147 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 PBSS4350X,147 reliable?

The price and inventory of PBSS4350X,147 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4350X,147 is usually 5 days.

3.What payment methods are accepted for PBSS4350X,147?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4350X,147 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS4350X,147?

PBSS4350X,147 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS4350X,147 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 PBSS4350X,147?

For technical support, including PBSS4350X,147 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4350X,147 requirements.

6.How does Aetrix verify that PBSS4350X,147 is sourced from the original manufacturer or authorized distributors?

All PBSS4350X,147 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 PBSS4350X,147 meets industry standards.

7.What is the process for return or replacement of PBSS4350X,147?

All PBSS4350X,147 units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4350X,147, 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 PBSS4350X,147 part is unused and in its original packaging.

Return procedure for PBSS4350X,147:

1.Submit a request within 90 days.

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

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