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

Nexperia USA Inc. PBSS304NX-QX

Name: PBSS304NX-QX
Brand: Nexperia USA Inc.
SKU: PBSS304NX-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS304NX-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: PBSS304NX-QX.pdf

Description:: TRANS NPN 60V 4.7A SOT-89

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PBSS304NX-QX from Nexperia is an AEC-Q101-qualified NPN low V_CEsat transistor in SOT89 package, designed for high-voltage switching roles in automotive power stages. It delivers 60 V V_CEO, 4.7 A continuous I_C, and ultra-low 37–53 mΩ R_CEsat at 4 A/200 mA drive - enabling efficient high-side gate driving and DC-DC power switches in engine control units and HVAC modules.

For engineers reviewing the PBSS304NX-QX datasheet, PBSS304NX-QX pinout, PBSS304NX-QX application, or PBSS304NX-QX equivalent, this device is selected for high-efficiency, thermally constrained automotive power switching where low conduction loss, AEC-Q101 compliance, and SOT89-mountable footprint are mandatory.

Technical Context

This NPN transistor operates as a saturated-switching element with fixed emitter-grounded topology. Its low R_CEsat (37–53 mΩ) and high h_FE (75–115 at 6 A) enable robust current gain under high-load pulsed conditions while minimizing thermal stress on PCBs with limited copper area.

Thermal performance is defined across three mounting configurations: FR4 standard (208 K/W), FR4 with 6 cm² collector pad (76 K/W), and ceramic Al₂O₃ (60 K/W). Switching times - t_on = 110 ns, t_off = 555 ns - support operation up to ~1 MHz in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum blocking voltage across collector-emitter in open-base configuration; supports 48 V automotive systems with margin.
I_C	4.7 A continuous - Sustained current capability at T_amb ≤ 25 °C on FR4; defines usable load range for motor drivers and solenoid controls.
R_CEsat	37–53 mΩ at I_C = 4 A, I_B = 200 mA - Directly determines conduction loss (P_cond ≈ I_C² × R_CEsat) and junction temperature rise.
h_FE	75–115 at I_C = 6 A - Ensures reliable saturation with modest base drive, reducing driver-stage complexity and power consumption.
t_off	555 ns - Total turn-off delay + storage + fall time; enables fast PWM control in 100–500 kHz switching regulators.
T_j max	150 °C - Maximum allowable junction temperature; sets thermal design boundary for heatsinking and layout.

Pinout & Package

SOT89 (SC-62/TO-243) plastic surface-mount package: 3-pin, 1.5 mm pitch, 4.5 × 2.5 × 1.5 mm body; collector tab forms exposed thermal pad on underside.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Reference node for current flow; connected to ground or low-side return path in high-side switch configurations.
2	Collector	Main power output terminal; electrically and thermally coupled to PCB copper pour for heat dissipation.
3	Base	Control input requiring ~200 mA drive for full saturation; sensitive to ESD and requires series resistor for current limiting.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114; suitable for under-hood ECUs.
Low R_CEsat	37–53 mΩ reduces conduction losses by >40% vs. standard bipolar transistors, lowering thermal load on compact PCBs.
High I_CM	9.4 A peak pulse rating supports short-duration surge currents in motor startup and fault recovery without latch-up.
Thermal resistance optimization	76 K/W on FR4 with 6 cm² collector pad enables 1.65 W dissipation - sufficient for intermittent 4.7 A loads without external heatsink.

Applications

Engine Control Unit (ECU) Injector Driver

Automotive HVAC Blower Motor Control

Use Scenario: Driving 12–48 V fuel injector solenoids with 2–5 ms on-time pulses at up to 10 Hz repetition rate.

IC Role / Device Role / Timing Role: High-side NPN switch controlling solenoid current path; handles 4.7 A peak coil current with minimal V_CEsat-induced voltage drop.

Use Value: Low R_CEsat ensures ≥98% energy delivery to solenoid during pulse, improving injection accuracy and reducing thermal derating in dense ECU layouts.

Use Scenario: Regulating 24 V blower motor speed via PWM-driven high-side switch in cabin climate control module.

IC Role / Device Role / Timing Role: Saturated NPN power switch operating at 20–100 kHz; provides bidirectional current control when paired with freewheeling diode.

Use Value: 555 ns t_off and 110 ns t_on minimize dead-time distortion, enabling smooth low-speed torque and reduced audible noise.

48 V Mild Hybrid DC-DC Converter

Automotive LED Headlamp Power Switch

Use Scenario: High-side synchronous rectifier or auxiliary switch in 48 V–12 V buck converter for start-stop systems.

IC Role / Device Role / Timing Role: Low-loss power switch handling 4 A continuous current with <200 mV V_CEsat at rated load.

Use Value: 37–53 mΩ R_CEsat cuts conduction loss to <100 mW, eliminating need for MOSFET-level gate drivers while retaining bipolar cost advantage.

Use Scenario: On/off control of high-brightness LED arrays (10–30 W) in adaptive front lighting systems (AFS).

IC Role / Device Role / Timing Role: Constant-current switch managing 2–4 A LED strings; driven by microcontroller GPIO with base resistor network.

Use Value: AEC-Q101 qualification and 150 °C T_j max ensure stable operation in sealed headlamp housings exceeding 105 °C ambient.

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 NSS30401MZ4T1G	Same SOT89 package, 60 V V_CEO, but higher R_CEsat (65–95 mΩ) and lower I_C (3.5 A).	Less suitable for 4.7 A continuous loads; requires larger base drive for equivalent saturation.	Select only if supply-chain availability outweighs efficiency requirements in non-automotive designs.
Diodes Incorporated DXT3040Z-13	60 V V_CEO, 4.5 A I_C, R_CEsat 45–68 mΩ; not AEC-Q101 qualified.	Limited to industrial or consumer applications; lacks automotive reliability validation and extended temperature support.	Acceptable for cost-sensitive non-automotive power switches where qualification is not mandated.

Compared with NSS30401MZ4T1G and DXT3040Z-13, PBSS304NX-QX delivers superior conduction efficiency at full rated current and is the only option qualified for automotive use - making it the default choice for safety-critical, thermally constrained, and production-intent vehicle electronics.

Availability

PBSS304NX-QX is available at Aetrix Electronics and suitable for automotive engine control, HVAC motor drives, 48 V DC-DC conversion, and LED headlamp power switching requiring stable component supply across multi-year production cycles.

Supply support for PBSS304NX-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 mobile markets.

PBSS304NX-QX belongs to Nexperia's AEC-Q101-qualified low V_CEsat transistor family, engineered specifically for high-efficiency, high-current switching in automotive power management and actuator control systems.

FAQ

What is the maximum safe operating current for PBSS304NX-QX at 85 °C ambient?

At 85 °C ambient, the device's thermal derating curve shows P_tot drops to ~1.1 W on FR4 with standard footprint. With R_CEsat = 53 mΩ, the corresponding safe continuous I_C is approximately 4.5 A - assuming adequate PCB copper area and no additional airflow. For sustained 4.7 A operation above 25 °C, use the 6 cm² collector pad layout.

Can PBSS304NX-QX replace a MOSFET in high-side switch applications?

Yes - when driven with sufficient base current (≥200 mA), PBSS304NX-QX achieves V_CEsat < 250 mV at 4 A, matching many logic-level MOSFETs' on-resistance. Its bipolar nature eliminates gate charge concerns and simplifies drive circuitry, though it requires continuous base current unlike MOSFETs' voltage-controlled gate.

Is the SOT89 package lead-free and RoHS compliant?

Yes - PBSS304NX-QX uses lead-free solderable terminations and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The package meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1, allowing unlimited floor life at ≤30 °C/60% RH.

How does the PNP complement PBSS304PX-Q differ in layout and drive requirements?

PBSS304PX-Q shares identical SOT89 mechanical dimensions and thermal characteristics but reverses polarity: pin 1 = collector, pin 2 = emitter, pin 3 = base. Its drive logic is inverted - requiring negative base current for saturation - and its V_ECO rating is also 60 V, enabling complementary push-pull configurations in H-bridge or dual-switch topologies.

PBSS304NX-QX 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):: 4.7 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 290mV @ 80mA, 4A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 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

PBSS304NX-QX FAQ

1.How can I place an order for PBSS304NX-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS304NX-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 PBSS304NX-QX reliable?

The price and inventory of PBSS304NX-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS304NX-QX is usually 5 days.

3.What payment methods are accepted for PBSS304NX-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS304NX-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS304NX-QX?

PBSS304NX-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS304NX-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 PBSS304NX-QX?

For technical support, including PBSS304NX-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS304NX-QX requirements.

6.How does Aetrix verify that PBSS304NX-QX is sourced from the original manufacturer or authorized distributors?

All PBSS304NX-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 PBSS304NX-QX meets industry standards.

7.What is the process for return or replacement of PBSS304NX-QX?

All PBSS304NX-QX units undergo pre-shipment inspection (PSI). If there is an issue with PBSS304NX-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 PBSS304NX-QX part is unused and in its original packaging.

Return procedure for PBSS304NX-QX:

1.Submit a request within 90 days.

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

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