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

Nexperia USA Inc. PBSS305PX-QX

Name: PBSS305PX-QX
Brand: Nexperia USA Inc.
SKU: PBSS305PX-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS305PX-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: PBSS305PX-QX.pdf

Description:: TRANS PNP 80V 4A SOT-89

Quantity:: RFQ Add To RFQ list

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Inventory:6,796

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Product details

Overview

PBSS305PX-QX from Nexperia is a PNP low V_CEsat transistor in SOT89 package, rated for −80 V V_CEO, −4 A continuous collector current, and 58 mΩ typical R_CEsat at −4 A/−200 mA drive. It serves as a high-efficiency high-voltage switch in automotive power stages, delivering reduced conduction loss and thermal stress in DC-DC converters and motor drivers.

For engineers reviewing the PBSS305PX-QX datasheet, PBSS305PX-QX pinout, PBSS305PX-QX application, or PBSS305PX-QX equivalent, key selection criteria include its AEC-Q101 qualification, low saturation resistance under high-current pulsed conditions, thermal performance on FR4 vs. ceramic PCBs, and complementary NPN pairing with PBSS305NX-Q.

Technical Context

This PNP bipolar junction transistor operates in saturation mode for switching applications, with V_CEsat specified down to −60 mV (typ.) at −4 A/−200 mA and −100 mV (max.) under same conditions. Its h_FE remains robust-45–70 at −5 A-enabling stable base drive design across temperature (−55 °C to 150 °C).

Thermal behavior is defined by three mounting configurations: 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 are characterized at −12.5 V V_CC, −3 A I_C, with t_on = 100 ns and t_off = 285 ns, supporting high-frequency PWM control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−80 V - Withstands 80 V reverse collector-emitter voltage with base open; enables use in 48 V and 60 V automotive systems.
I_C	−4 A continuous - Supports sustained load currents up to 4 A without derating at T_amb ≤ 25 °C on standard FR4.
R_CEsat	58 mΩ typ. at −4 A/−200 mA - Delivers <0.1 W conduction loss (I²R) at full rated current, reducing heatsink requirements.
h_FE	45–70 at −5 A - Ensures reliable saturation with moderate base drive (IB ≥ −100 mA), simplifying gate driver interface design.
t_off	285 ns - Enables switching frequencies >300 kHz in hard-switched topologies while maintaining low switching loss.
T_j max	150 °C - Rated junction temperature allows operation in under-hood automotive environments with proper thermal layout.
AEC-Q101	Qualified - Meets stress test requirements for discrete semiconductors in automotive applications per AEC standard.

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 construction optimized for thermal transfer via collector tab soldering.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit node; connected to system ground or low-side return path in high-side switch configurations.
2	Collector	Main power output terminal; thermally enhanced tab requires ≥6 cm² copper pour on FR4 for rated 1.65 W dissipation.
3	Base	Control input; driven negative relative to emitter to turn on; requires current-limited source (e.g., resistor or driver) to avoid overdrive.

Key Features

Feature	Design Value
Low V_CEsat	−60 mV typ. at −4 A ensures <0.25 W conduction loss, enabling compact thermal design in space-constrained modules.
High I_C capability	−4 A continuous + −8 A peak supports high-power loads such as radiator fans and HVAC blowers without paralleling devices.
High h_FE at high I_C	Min. 45 at −5 A reduces required base drive current and eases integration with low-current microcontrollers or logic buffers.
AEC-Q101 qualification	Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock per industry standard.
Small SOT89 footprint	4.5 mm × 2.5 mm area saves >40% board space vs. TO-220, enabling dense power stage layouts in ADAS and body control units.

Applications

Automotive HVAC Blower Control

48 V DC-DC Converter High-Side Switch

Use Scenario: Controlling 12–24 V blower motors in passenger cabin HVAC systems using PWM-driven high-side configuration.

IC Role / Device Role / Timing Role: PNP high-side switch turning on/off motor supply rail; handles repetitive 10–20 kHz PWM with <300 ns switching transitions.

Use Value: Low R_CEsat minimizes voltage drop and heat generation during 100% duty cycle operation, extending motor life and reducing thermal management complexity.

Use Scenario: High-side switching element in non-isolated buck converter supplying 5 V/3 A to infotainment ECUs from 48 V battery rail.

IC Role / Device Role / Timing Role: Main power switch operating at 250 kHz; conducts −4 A average current with pulsed base drive synchronized to controller.

Use Value: 58 mΩ R_CEsat limits conduction loss to <0.9 W, allowing operation without forced air cooling on standard FR4 PCB with 6 cm² collector pad.

Engine Cooling Fan Driver

High-Voltage MOSFET Gate Driver Stage

Use Scenario: Driving brushed radiator cooling fan (up to 300 W) directly from engine control unit outputs in commercial vehicles.

IC Role / Device Role / Timing Role: Final-stage power switch interfacing between MCU GPIO and fan winding; handles inductive kickback via built-in safe operating area margin.

Use Value: −80 V V_CEO withstands load dump transients up to ±87 V per ISO 7637-2, eliminating need for external TVS clamping.

Use Scenario: Level-shifting and current-boosting stage driving gates of 60 V N-channel MOSFETs in half-bridge motor inverters.

IC Role / Device Role / Timing Role: Active pull-down device sinking gate charge rapidly during MOSFET turn-off; complements NPN pre-driver in totem-pole configuration.

Use Value: Fast 285 ns t_off ensures clean gate discharge, minimizing shoot-through risk in high-speed motor commutation (e.g., EPS or power steering).

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSS30510PZT1G	−60 V V_CEO, −3.5 A I_C, 100 mΩ R_CEsat; SOT-23 package; lower voltage rating and higher saturation resistance.	Not qualified to AEC-Q101; limited to non-safety-critical 24 V industrial controls, not automotive under-hood.	Select only for cost-sensitive 24 V designs where thermal budget permits higher conduction loss and qualification is unnecessary.
Diodes Incorporated DXT30510PSQ-13	−80 V V_CEO, −4 A I_C, 75 mΩ R_CEsat; SOT89 package; AEC-Q101 qualified but h_FE min. = 30 at −5 A.	Lower current gain increases base drive requirement; less margin for drive circuit aging or temperature drift.	Prefer when existing designs already use Diodes Inc. ecosystem or require tighter V_CEsat tolerance (±15%) over h_FE stability.

Compared with NSS30510PZT1G and DXT30510PSQ-13, PBSS305PX-QX delivers superior thermal efficiency (58 mΩ vs. ≥75 mΩ), higher guaranteed h_FE at full load, and identical AEC-Q101 compliance-making it optimal for thermally constrained, high-reliability automotive switching nodes.

Availability

PBSS305PX-QX is available at Aetrix Electronics and suitable for automotive HVAC control, 48 V DC-DC conversion, and high-voltage motor driver applications requiring stable component supply across multi-year production cycles.

Supply support for PBSS305PX-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 for automotive, industrial, and consumer markets.

PBSS305PX-QX belongs to Nexperia's Automotive Qualified PNP Low V_CEsat Transistor product line, engineered specifically for high-efficiency, high-voltage switching in demanding automotive power systems.

FAQ

What is the maximum allowable PCB temperature rise when operating PBSS305PX-QX at −4 A continuous current?

At −4 A on standard FR4 (single-sided copper, tin-plated), the device dissipates up to 0.93 W (I² × R_CEsat = 16 × 0.058). With R_th(j-a) = 208 K/W, this yields ~193 K junction-to-ambient rise. To maintain T_j ≤ 150 °C, ambient must stay ≤ −43 °C-so practical use requires either derating, enhanced copper, or ceramic substrate. For 25 °C ambient, max continuous I_C is ~2.6 A on standard FR4.

Can PBSS305PX-QX replace PBSS305NX-Q in a complementary pair design?

No-PBSS305PX-QX is PNP; PBSS305NX-Q is its NPN complement. They are not interchangeable. However, they are designed as matched pairs: both share identical SOT89 package, −80 V rating, −4 A I_C, and comparable R_CEsat (58 mΩ PNP vs. 55 mΩ NPN), enabling symmetrical high-side/low-side switching in H-bridge or push-pull topologies without thermal imbalance.

Does PBSS305PX-QX require a base resistor, and what value is recommended for −4 A switching?

Yes-a base resistor is mandatory to limit I_B. For −4 A I_C and h_FE ≥ 45, minimum I_B = −89 mA. With V_BEsat ≈ −0.95 V and 3.3 V logic drive, R_B = (3.3 V − 0.95 V)/0.089 A ≈ 26 Ω. Use 27 Ω ±5%, 0.25 W, placed close to base pin to minimize ringing. For improved switching speed, add a 10 kΩ pull-down from base to emitter.

How does the SOT89 package's thermal performance compare between FR4 and ceramic PCB mounting?

On FR4 with 6 cm² collector pad, R_th(j-a) drops from 208 K/W (standard) to 76 K/W-nearly 3× improvement. On ceramic Al₂O₃, it further improves to 60 K/W. This means at −4 A, junction temperature rises only ~35 °C above ambient on ceramic vs. ~105 °C on standard FR4-enabling full-rated current without heatsinks in space-constrained automotive modules.

PBSS305PX-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):: 4 A

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: 420mV @ 235mA, 4.7A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 500mA, 2V

Power - Max:: 600 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

PBSS305PX-QX FAQ

1.How can I place an order for PBSS305PX-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS305PX-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 PBSS305PX-QX reliable?

The price and inventory of PBSS305PX-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS305PX-QX is usually 5 days.

3.What payment methods are accepted for PBSS305PX-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS305PX-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS305PX-QX?

PBSS305PX-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS305PX-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 PBSS305PX-QX?

For technical support, including PBSS305PX-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS305PX-QX requirements.

6.How does Aetrix verify that PBSS305PX-QX is sourced from the original manufacturer or authorized distributors?

All PBSS305PX-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 PBSS305PX-QX meets industry standards.

7.What is the process for return or replacement of PBSS305PX-QX?

All PBSS305PX-QX units undergo pre-shipment inspection (PSI). If there is an issue with PBSS305PX-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 PBSS305PX-QX part is unused and in its original packaging.

Return procedure for PBSS305PX-QX:

1.Submit a request within 90 days.

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

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