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

Nexperia USA Inc. PBSS4350X,135

Name: PBSS4350X,135
Brand: Nexperia USA Inc.
SKU: PBSS4350X,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS4350X,135

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: PBSS4350X,135.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PBSS4350X,135 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 low-voltage power stages such as DC/DC converter synchronous rectification and battery charger load switches.

For engineers reviewing the PBSS4350X,135 datasheet, PBSS4350X,135 pinout, PBSS4350X,135 application, or PBSS4350X,135 equivalent, key selection criteria include its 260–370 mV V_CEsat at 3 A, thermal resistance as low as 80 K/W on ceramic PCB, AEC-Q101 qualification, and SOT89 footprint compatibility with space-constrained automotive and industrial power modules.

Technical Context

This device operates as a discrete NPN bipolar junction transistor optimized for low-saturation switching in medium-power linear and pulse-width modulated loads. Its design emphasizes minimal conduction loss via ultra-low R_CEsat and robust thermal performance under pulsed I_C up to 5 A.

The transistor supports base-driven control with h_FE ≥ 100 at I_C = 3 A and exhibits stable V_CEsat across −55 °C to 150 °C junction temperature, enabled by process-controlled epitaxial structure and optimized emitter geometry.

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 (continuous)	3 A - Continuous collector current rating at T_amb ≤ 25 °C on standard FR4 PCB; enables use in 5–12 V supply rail switching without forced cooling.
R_CEsat	100–130 mΩ - Equivalent on-resistance at I_C = 2 A / I_B = 200 mA; directly determines conduction loss (P_cond ≈ I_C² × R_CEsat) in high-current switching nodes.
V_CEsat	260–370 mV - Saturation voltage at I_C = 3 A / I_B = 300 mA; enables <1 W dissipation at full load, reducing heatsink requirements.
h_FE	≥100 - DC current gain at I_C = 3 A / V_CE = 2 V; ensures reliable saturation with modest base drive (≤300 mA), easing driver IC selection.
T_j max	150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and sealed industrial enclosures.
AEC-Q101	Qualified - Certified for automotive-grade reliability per stress test requirements including HTGB, HTRB, and ESD; suitable for ASIL-B supporting functions.

Pinout & Package

SOT89 (SC-62) plastic surface-mount package: 3-pin, 1.5 mm pitch, 4.5 mm × 2.5 mm × 1.5 mm body; collector tab forms exposed thermal pad for direct PCB copper connection.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current return path; connected to ground or low-side reference; requires low-inductance routing for fast switching.
2	Collector	Main power output terminal; electrically and thermally coupled to large copper pour for heat dissipation and current handling.
3	Base	Control input; driven with ≥300 mA peak to ensure full saturation at 3 A load; requires series resistor to limit drive current.

Key Features

Feature	Design Value
Low V_CEsat	260–370 mV at 3 A enables >95% efficiency in 5–12 V DC/DC output stages and reduces thermal derating in compact layouts.
AEC-Q101 qualification	Validated for automotive power management systems requiring extended temperature operation (−55 °C to 150 °C) and long-term reliability.
SOT89 thermal performance	R_th(j-a) = 80 K/W on ceramic PCB allows 1.6 W dissipation without heatsink-ideal for space-limited LED drivers and peripheral power switches.
High I_CM	5 A peak collector current supports surge-tolerant operation in motor and relay coil driving applications with transient overloads.
Robust h_FE stability	h_FE ≥ 100 at 3 A ensures consistent saturation across production lots and temperature extremes, minimizing drive circuit margining.

Applications

Automotive Power Switching

DC/DC Converter Synchronous Rectifier

Use Scenario: Low-side switching of 12 V accessory loads (e.g., HVAC fans, seat heaters) in passenger vehicle ECUs.

IC Role / Device Role / Timing Role: Discrete NPN switch controlled by microcontroller GPIO; replaces mechanical relay for faster response and longer life.

Use Value: 260 mV V_CEsat limits power loss to <2.4 W at 3 A, eliminating need for heatsink while meeting AEC-Q101 vibration and thermal cycling requirements.

Use Scenario: Secondary-side synchronous rectification in 5–12 V buck converters powering infotainment head units.

IC Role / Device Role / Timing Role: High-current, low-loss replacement for Schottky diodes; driven by gate driver synchronized to primary MOSFET.

Use Value: 100 mΩ R_CEsat cuts conduction loss by ~40% vs. 40 V/3 A Schottky, improving converter efficiency from 88% to 92% at 2 A load.

Battery Charger Load Switch

LCD Backlight Driver

Use Scenario: Isolation switch between Li-ion battery pack and charging circuit in portable medical devices.

IC Role / Device Role / Timing Role: Reverse-polarity and overcurrent protected main power path switch; controlled by charge management IC.

Use Value: 50 V V_CBO provides 2× safety margin over 21 V max 5S battery stack; 3 A rating supports 10 W fast-charging paths.

Use Scenario: Constant-current dimming control for white LED strings in automotive instrument clusters.

IC Role / Device Role / Timing Role: Linear current sink modulated by PWM signal; dissipates excess voltage drop across collector-emitter.

Use Value: 1.4 W P_tot on 6 cm² FR4 copper enables 200 mA LED drive at 7 V dropout without external heatsink-reducing BOM count.

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 NSS40201MR6T1G	40 V V_CBO, 2 A I_C, 140 mΩ R_CEsat, SOT-23 package	Lower voltage/current rating; smaller footprint but higher thermal resistance (300 K/W)	Preferred for space-constrained 3.3–5 V logic-level switching where 2 A suffices and thermal budget permits.
Diodes Incorporated DXT7050Q-13	60 V V_CBO, 3 A I_C, 120 mΩ R_CEsat, SOT89 package, AEC-Q101 qualified	Nearly identical electrical specs; slightly higher V_CEsat (300 mV @ 3 A) and same thermal profile	Drop-in alternative when Nexperia supply is constrained; validated for same automotive power switching roles.

Compared with PBSS4350X,135, NSS40201MR6T1G trades voltage headroom and thermal performance for miniaturization, while DXT7050Q-13 offers functionally equivalent AEC-Q101 SOT89 performance with minor V_CEsat variance-making it the most direct second-source option.

Availability

PBSS4350X,135 is available at Aetrix Electronics and suitable for automotive power switching, DC/DC converter synchronous rectification, and battery charger load switching requiring stable component supply, AEC-Q101 compliance, and SOT89 thermal performance.

Supply support for PBSS4350X,135 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.

The PBSS4350X belongs to Nexperia's "Low V_CEsat Transistor" product line, engineered specifically for replacing Schottky diodes and MOSFETs in medium-current (<5 A), low-voltage (<60 V) power switching applications where thermal density and cost-per-watt are critical.

FAQ

What is the maximum continuous collector current for PBSS4350X,135 at 85 °C ambient?

At T_amb = 85 °C on a standard FR4 PCB (1 cm² collector pad), the device supports 2.1 A continuous collector current. This is derived from its 1.4 W total power dissipation rating and thermal resistance of 125 K/W, ensuring junction temperature remains below 150 °C with 30 K margin.

Can PBSS4350X,135 replace a MOSFET in a 12 V load switch application?

Yes-its 260–370 mV V_CEsat at 3 A yields comparable conduction loss to a typical 20 mΩ MOSFET (e.g., 3 A² × 20 mΩ = 180 mW vs. 3 A² × 0.3 V = 270 mW). Unlike MOSFETs, it requires base current drive (~300 mA), but eliminates gate charge and body diode reverse recovery concerns.

Is the SOT89 package lead-free and RoHS compliant?

Yes-PBSS4350X,135 is manufactured using lead-free solderable terminations and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The package uses matte tin plating over nickel underplate on copper leadframe.

How does AEC-Q101 qualification impact PCB layout for PBSS4350X,135?

AEC-Q101 qualification mandates robust mechanical and thermal design: the SOT89 collector pad must be connected to ≥1 cm² of 2 oz copper with ≥3 thermal vias to inner layers, and solder mask defined pads are required to prevent solder wicking during reflow-ensuring long-term bond integrity under thermal cycling.

PBSS4350X,135 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

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,135 FAQ

1.How can I place an order for PBSS4350X,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS4350X,135 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,135 reliable?

The price and inventory of PBSS4350X,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4350X,135 is usually 5 days.

3.What payment methods are accepted for PBSS4350X,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4350X,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS4350X,135?

PBSS4350X,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS4350X,135 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,135?

For technical support, including PBSS4350X,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4350X,135 requirements.

6.How does Aetrix verify that PBSS4350X,135 is sourced from the original manufacturer or authorized distributors?

All PBSS4350X,135 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,135 meets industry standards.

7.What is the process for return or replacement of PBSS4350X,135?

All PBSS4350X,135 units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4350X,135, 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,135 part is unused and in its original packaging.

Return procedure for PBSS4350X,135:

1.Submit a request within 90 days.

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

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