Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. PBSS4350X,115

Name: PBSS4350X,115
Brand: Nexperia USA Inc.
SKU: PBSS4350X,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PBSS4350X,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: PBSS4350X,115.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:19,083

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PBSS4350X,115 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 DC/DC converters and battery charger circuits where thermal performance and board space are constrained.

For engineers reviewing the PBSS4350X,115 datasheet, PBSS4350X,115 pinout, PBSS4350X,115 application, or PBSS4350X,115 equivalent, key selection criteria include its 50 V breakdown rating, 3 A DC current capability, 260–370 mV V_CEsat across operating range, AEC-Q101 qualification, and SOT89 thermal performance with up to 1.6 W dissipation on ceramic PCB.

Technical Context

This device operates as a saturated-switching NPN transistor optimized for low-loss power control. Its design centers on minimizing V_CEsat and R_CEsat under high-current drive (I_B up to 300 mA), enabling efficient conduction in supply-line switching and inductive load driving.

It features a maximum junction temperature of 150 °C, thermal resistance R_th(j-a) as low as 80 K/W on ceramic PCB, and supports pulsed operation with duty cycle ≤ 0.02 at T_amb = 25 °C - critical for transient load handling in automotive and industrial power stages.

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 DC collector current; enables direct drive of medium-power loads like relays, LED backlights, and peripheral drivers without external heat sinking.
V_CEsat	260–370 mV - Measured at I_C = 2–3 A / I_B = 100–300 mA; directly reduces conduction loss and self-heating in battery-powered systems.
R_CEsat	100–130 mΩ - Equivalent on-resistance at I_C = 2 A; simplifies thermal modeling and enables accurate power loss calculation in PCB-level design.
h_FE	100 min - DC current gain at I_C = 3 A / V_CE = 2 V; ensures reliable saturation with moderate base drive, reducing driver-stage complexity.
T_j max	150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments and sealed industrial enclosures.
AEC-Q101	Qualified - Certified for automotive applications per stress-test requirements; validates reliability for engine control, body electronics, and ADAS power subsystems.

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; thermally enhanced with large collector pad for PCB copper area mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Reference node for current return path; connected to ground or low-side reference plane in common-emitter switching topologies.
2	Collector	Main power output terminal; requires ≥1 cm² copper pour for thermal management; electrically and thermally coupled to PCB ground plane in layout.
3	Base	Control input for saturation; driven with 100–300 mA to achieve specified V_CEsat; requires series resistor to limit drive current from MCU or logic gate.

Key Features

Feature	Design Value
Low V_CEsat	260–370 mV at full 3 A load - cuts conduction loss by >40% vs. standard bipolar transistors, improving efficiency in 5–24 V power rails.
SOT89 thermal performance	1.6 W max power dissipation on ceramic PCB - enables higher current density without heatsink in space-constrained modules like automotive ECUs.
AEC-Q101 qualification	Stress-tested per automotive discrete semiconductor standard - assures long-term reliability in vibration-prone, temperature-cycling environments.
High I_CM	5 A peak collector current - supports surge handling in motor startup, relay pull-in, and capacitor charging events without failure.
Robust breakdown ratings	50 V V_CBO/V_CEO, 5 V V_EBO - provides margin against voltage transients in 12 V/24 V automotive and industrial supply lines.

Applications

DC/DC Converter Switching Stage

Battery Charger Load Switch

Use Scenario: High-efficiency buck converter in automotive infotainment power supply delivering 3.3 V/2 A from 12 V battery rail.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier replacement; operated in hard-switched saturation mode with 200 kHz PWM.

Use Value: 280 mV V_CEsat at 2 A reduces conduction loss to 560 mW, lowering thermal rise and eliminating need for active cooling.

Use Scenario: Input isolation switch in USB-C PD-compatible portable charger managing 5–20 V input from wall adapter or car port.

IC Role / Device Role / Timing Role: Reverse-polarity and overvoltage protection switch placed before charging IC; controlled by microcontroller GPIO.

Use Value: 3 A continuous rating and 50 V V_CEO withstand capability ensure safe operation during hot-plug and adapter-swap events.

LCD Backlight Driver

Inductive Load Driver (Relay/Buzzer)

Use Scenario: Constant-current LED string driver in automotive instrument cluster backlighting using 4× white LEDs in series.

IC Role / Device Role / Timing Role: Linear current-regulating pass transistor; biased in active region with feedback loop controlling I_C.

Use Value: 100 h_FE minimum ensures stable current regulation with low base-drive overhead, reducing MCU GPIO loading.

Use Scenario: Driving 12 V SPDT automotive relay (150 mA coil) in door-lock actuation module with pulse-width modulated enable signal.

IC Role / Device Role / Timing Role: Saturated switch controlling relay coil; switched at 10 Hz with 100 ms on-time pulses.

Use Value: 5 A I_CM and 150 °C T_j max allow safe handling of relay inrush current (up to 3× steady-state) without derating.

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 NSS40501MR6T1G	Same SOT89 package; 40 V V_CBO, 5 A I_C, 120 mΩ R_CEsat - lower voltage rating but higher current and slightly lower R_CEsat.	Not AEC-Q101 qualified; suitable for industrial but not automotive front-end modules.	Select when higher I_C and lower R_CEsat are prioritized over automotive qualification and 50 V headroom.
Diodes Incorporated DXTN3C45PSQ-13	SOT89 package; 45 V V_CBO, 3 A I_C, 140 mΩ R_CEsat; AEC-Q101 qualified; 1.2 V V_BEsat vs. 1.1 V typical for PBSS4350X.	Higher V_BEsat increases base drive power; identical thermal profile and footprint compatibility.	Choose when cross-supply chain sourcing is required and 45 V rating suffices for target system's worst-case transients.

Compared with NSS40501MR6T1G and DXTN3C45PSQ-13, PBSS4350X,115 uniquely balances 50 V blocking, AEC-Q101 compliance, and sub-300 mV V_CEsat at 3 A - making it optimal for automotive 12 V power distribution nodes requiring both safety margin and thermal efficiency.

Availability

PBSS4350X,115 is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converters, and portable battery charger designs requiring stable component supply, long-lifecycle support, and AEC-Q101 assurance.

Supply support for PBSS4350X,115 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 core expertise in power management, analog, and automotive-grade components.

PBSS4350X,115 belongs to Nexperia's low V_CEsat transistor product line, engineered specifically for energy-efficient power switching in automotive and industrial applications where thermal constraints and reliability under cyclic stress are critical.

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 saturation at I_C = 3 A, the recommended base drive is 300 mA - verified by V_CEsat = 370 mV test condition. Exceeding 300 mA offers diminishing returns and risks excessive base-emitter heating without significant V_CEsat reduction.

Can PBSS4350X,115 be used in linear regulator applications?

Yes - its 100 minimum h_FE at I_C = 3 A and 150 °C T_j max support linear regulation use cases such as constant-current LED drivers. Thermal design must account for power dissipation: at 2 A output and 5 V dropout, P_D = 10 W requires ≥6 cm² copper on FR4 or ceramic PCB to stay within 150 °C junction limit.

How does the SOT89 package affect thermal performance compared to SOT23?

SOT89 delivers up to 2× higher power dissipation than SOT23 due to larger collector pad area and improved thermal path to PCB. With 1.6 W capability on ceramic PCB versus ~0.5 W for SOT23, it enables 3 A operation without external heatsink - critical for space-constrained automotive modules where airflow is limited and ambient temperatures exceed 85 °C.

Is there a PNP complement available for complementary switching designs?

Yes - PBSS5350X is the designated PNP complement, sharing identical SOT89 package, 50 V ratings, 3 A I_C, and AEC-Q101 qualification. Its V_CEsat is 290–400 mV at I_C = –2 A / I_B = –200 mA, enabling matched performance in H-bridge or dual-rail power switches where polarity symmetry matters.

PBSS4350X,115 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,115 FAQ

1.How can I place an order for PBSS4350X,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS4350X,115 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,115 reliable?

The price and inventory of PBSS4350X,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4350X,115 is usually 5 days.

3.What payment methods are accepted for PBSS4350X,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4350X,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS4350X,115?

PBSS4350X,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS4350X,115 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,115?

For technical support, including PBSS4350X,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4350X,115 requirements.

6.How does Aetrix verify that PBSS4350X,115 is sourced from the original manufacturer or authorized distributors?

All PBSS4350X,115 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,115 meets industry standards.

7.What is the process for return or replacement of PBSS4350X,115?

All PBSS4350X,115 units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4350X,115, 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,115 part is unused and in its original packaging.

Return procedure for PBSS4350X,115:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…