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

Nexperia USA Inc. PBSS303PX-QX

Name: PBSS303PX-QX
Brand: Nexperia USA Inc.
SKU: PBSS303PX-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS303PX-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: PBSS303PX-QX.pdf

Description:: TRANS PNP 30V 5.1A SOT-89

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PBSS303PX-QX from Nexperia is a PNP low V_CEsat transistor in SOT89 package, rated for −30 V V_CEO, −5.1 A continuous collector current, and 32 mΩ typical R_CEsat at −4 A/−200 mA drive. It serves as a high-efficiency power switch in automotive-grade DC-DC converters and motor control stages.

For engineers reviewing the PBSS303PX-QX datasheet, PBSS303PX-QX pinout, PBSS303PX-QX application, or PBSS303PX-QX equivalent, key selection criteria include its AEC-Q101 qualification, low saturation resistance, thermal performance on FR4 PCBs, and complementary NPN pairing with PBSS303NX-Q.

Technical Context

This PNP bipolar junction transistor operates in saturation switching mode with V_CEsat as low as 160 mV at −4 A/−200 mA drive and exhibits h_FE of 100–160 at −6 A. Its design targets high-current, low-loss switching where minimal conduction loss and predictable turn-on behavior are critical.

Thermal performance is defined across three mounting conditions: R_th(j-a) = 208 K/W (standard FR4), 76 K/W (FR4 with 6 cm² collector pad), and 60 K/W (ceramic Al₂O₃). Switching times include t_on = 70 ns and t_off = 320 ns under −12.5 V V_CC, −3 A I_C, and ±0.15 A base drive.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−30 V - Maximum safe collector-emitter voltage with open base; defines blocking capability in high-side switch configurations
I_C	−5.1 A - Continuous DC collector current rating; supports sustained load switching in automotive power stages
R_CEsat	32 mΩ (typ) - Low saturation resistance at −4 A/−200 mA; reduces conduction loss and heat generation vs. standard transistors
h_FE	100–160 - High DC current gain at −6 A; enables efficient base drive with reduced gate driver burden
t_off	320 ns - Fast turn-off time under −12.5 V V_CC, −3 A I_C; improves switching efficiency in PWM-controlled loads
T_j max	150 °C - Maximum junction temperature; supports operation in under-hood automotive environments
AEC-Q101	Qualified - Meets stress-test requirements for discrete semiconductors in automotive applications

Pinout & Package

SOT89 (SC-62/TO-243) plastic surface-mount package: 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, flat lead profile optimized for thermal transfer via collector tab soldering.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit terminal; connected to system ground or low-side return path in high-side switch topologies
2	Collector	Main power output terminal; thermally enhanced tab requires direct PCB copper connection for heat dissipation
3	Base	Control input; driven negative relative to emitter to saturate; requires current-limited sourcing for reliable switching

Key Features

Feature	Design Value
Low V_CEsat	160–230 mV at −4 A/−255 mA - Reduces power loss by >50% versus conventional PNP transistors at same current
High I_C capability	−5.1 A continuous / −10.2 A pulsed - Supports high-current motor drivers and DC-DC synchronous rectifier stages
Automotive qualification	AEC-Q101 compliant - Validated for temperature cycling, HTRB, and ESD robustness per automotive reliability standards
Thermal optimization	R_th(j-sp) = 20 K/W - Enables direct thermal coupling to PCB copper, reducing need for external heatsinks

Applications

DC-DC Conversion

MOSFET Gate Driving

Use Scenario: Step-down converter in automotive body control module supplying 5 V/3 A to microcontroller peripherals.

IC Role / Device Role / Timing Role: PNP high-side switch controlling energy transfer into output inductor; operates in hard-saturation at 200 kHz PWM.

Use Value: 32 mΩ R_CEsat limits conduction loss to <150 mW at full load, eliminating active cooling.

Use Scenario: Level-shifting driver for N-channel MOSFET in 12 V battery-powered fan controller.

IC Role / Device Role / Timing Role: Inverting level shifter translating 3.3 V logic to −12 V gate pull-down; switches at ≤50 kHz.

Use Value: 70 ns t_on and 320 ns t_off ensure clean gate transitions without shoot-through risk.

Motor Control

Charging Circuits

Use Scenario: Bidirectional H-bridge half-bridge leg driving 24 V/2 A brushed DC window lift motor.

IC Role / Device Role / Timing Role: High-side PNP switch enabling reverse polarity control; thermally anchored to 6 cm² copper pour.

Use Value: R_th(j-a) = 76 K/W on FR4 allows 1.65 W dissipation without exceeding 150 °C junction limit.

Use Scenario: Constant-current charge switch regulating 500 mA into Li-ion battery pack in infotainment USB-C port.

IC Role / Device Role / Timing Role: Precision current-regulating pass element controlled by op-amp feedback loop.

Use Value: Tight V_CEsat tolerance (±30 mV) ensures ±2% current accuracy across temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSS30300PZT1G	−30 V V_CEO, −3.5 A I_C, 45 mΩ R_CEsat, SOT-23 package	Lower current rating and higher R_CEsat; limited thermal mass for sustained >2 A loads	Select when board space is constrained and peak current ≤3 A; not suitable for automotive under-hood ambient
Diodes Incorporated DXT30300P5-13	−30 V V_CEO, −5 A I_C, 40 mΩ R_CEsat, SOT-89 package, no AEC-Q101 qualification	Matches current rating but lacks automotive qualification and has 25% higher R_CEsat	Select for industrial non-automotive use where AEC-Q101 is not required and 8 mΩ higher loss is acceptable

Compared with NSS30300PZT1G and DXT30300P5-13, PBSS303PX-QX delivers superior thermal performance on FR4 PCBs, tighter R_CEsat tolerance, and verified AEC-Q101 compliance-making it the only choice for production automotive power switching where reliability and loss minimization are co-prioritized.

Availability

PBSS303PX-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, and consumer DC-DC power supplies requiring stable component supply and long-term lifecycle support.

Supply support for PBSS303PX-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 essential efficiency technologies, delivering high-performance, high-reliability discrete and logic devices.

PBSS303PX-QX belongs to Nexperia's Automotive-qualified Low V_CEsat Transistor product line, engineered specifically for high-current, low-loss switching in automotive power management and motor control systems.

FAQ

What is the maximum allowable base current for reliable operation?

The datasheet specifies I_B = −200 mA (pulsed) for R_CEsat characterization and −255 mA for V_CEsat at −4 A. Absolute maximum I_B is not explicitly listed, but continuous base current should be limited to ≤−100 mA to avoid thermal runaway; pulsed operation up to −400 mA is permitted for tp ≤ 300 µs with duty cycle δ ≤ 0.02.

Can PBSS303PX-QX replace a standard PNP transistor like BC807 in existing designs?

Yes, but only with circuit review: PBSS303PX-QX has higher current capability (−5.1 A vs. −500 mA), lower V_CEsat (≈0.16 V vs. ≈0.7 V), and SOT89 footprint vs. SOT23. Layout must accommodate larger package and thermal pad; base drive must scale to −200 mA for full current, unlike BC807's −5 mA typical.

How does thermal performance differ between FR4 and ceramic PCB mounting?

On standard FR4, R_th(j-a) = 208 K/W limits continuous power to ~0.6 W at 25 °C ambient; with 6 cm² collector pad, it drops to 76 K/W (1.65 W); on Al₂O₃ ceramic, it reaches 60 K/W (2.1 W). This 3.5× improvement enables full −5.1 A operation only with enhanced thermal layout or ceramic substrate.

Is the SOT89 footprint compatible with wave soldering processes?

Yes-the datasheet provides dedicated wave soldering footprint (Fig. 17) with 7.6 mm length, 2.4 mm width, and 1.9 mm pad spacing. Recommended transport direction aligns with pin 1–3 axis; solder mask openings and paste volume must follow Nexperia's sot089_fw guidelines to ensure void-free collector tab wetting.

PBSS303PX-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 5.1 A

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

Vce Saturation (Max) @ Ib, Ic:: 350mV @ 40mA, 4A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 1A, 2V

Power - Max:: 600 mW

Frequency - Transition:: 130MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

PBSS303PX-QX FAQ

1.How can I place an order for PBSS303PX-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS303PX-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 PBSS303PX-QX reliable?

The price and inventory of PBSS303PX-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS303PX-QX is usually 5 days.

3.What payment methods are accepted for PBSS303PX-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS303PX-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS303PX-QX?

PBSS303PX-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS303PX-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 PBSS303PX-QX?

For technical support, including PBSS303PX-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS303PX-QX requirements.

6.How does Aetrix verify that PBSS303PX-QX is sourced from the original manufacturer or authorized distributors?

All PBSS303PX-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 PBSS303PX-QX meets industry standards.

7.What is the process for return or replacement of PBSS303PX-QX?

All PBSS303PX-QX units undergo pre-shipment inspection (PSI). If there is an issue with PBSS303PX-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 PBSS303PX-QX part is unused and in its original packaging.

Return procedure for PBSS303PX-QX:

1.Submit a request within 90 days.

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

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