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

Nexperia USA Inc. PBSS4480X-QZ

Name: PBSS4480X-QZ
Brand: Nexperia USA Inc.
SKU: PBSS4480X-QZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS4480X-QZ

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: PBSS4480X-QZ.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PBSS4480X-Q from Nexperia is an AEC-Q101-qualified NPN low-V_CEsat transistor in SOT89 package, designed for medium-power switching in automotive and industrial systems. It delivers 80 V V_CEO, 4 A continuous collector current, 40–54 mΩ R_CEsat at 5 A/500 mA drive, and operates up to 150 °C junction temperature - enabling high-efficiency motor drivers and DC-DC power switches.

For engineers reviewing the PBSS4480X-Q datasheet, PBSS4480X-Q pinout, PBSS4480X-Q application, or PBSS4480X-Q equivalent, this device is selected for its verified low saturation resistance, automotive qualification, thermal performance on FR4 PCBs, and direct replacement capability in fan/motor driver and strobe flash circuits where heat dissipation and reliability under pulsed load are critical.

Technical Context

This NPN transistor uses epitaxial planar technology optimized for low on-state loss and stable gain across temperature. Its design emphasizes high h_FE (80–140 at 4 A) with tight V_CEsat distribution (170–230 mV at 4 A/400 mA), enabling efficient switching without external gate drivers. The SOT89 package integrates a thermally enhanced collector pad for direct PCB copper coupling.

It operates under pulsed conditions (tp ≤ 300 µs, δ ≤ 0.02) to sustain peak currents up to 10 A while maintaining safe junction temperatures. Thermal resistance from junction to solder point is 16 K/W, confirming robust thermal path integrity when mounted on standard FR4 with 6 cm² collector pad.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	80 V - Maximum allowable collector-emitter voltage with base open; defines safe blocking capability in 24 V/48 V automotive and industrial bus applications.
I_C (continuous)	4 A - Rated DC collector current; supports sustained operation in fan drivers and battery charger switches without forced cooling.
R_CEsat	40–54 mΩ - Equivalent on-resistance at 5 A/500 mA drive; enables <120 mW conduction loss at 2 A, reducing thermal stress in compact layouts.
h_FE	80–140 - DC current gain at 4 A/400 mA; ensures reliable saturation with moderate base drive, simplifying driver stage design.
T_j max	150 °C - Maximum junction temperature; validated per AEC-Q101, supporting under-hood and engine-control module deployment.
P_tot (FR4, 6 cm²)	1.4 W - Total power dissipation limit on standard PCB; aligns with thermal derating curves for ambient temperatures up to 100 °C.
f_T	120–150 MHz - Transition frequency at 10 V/100 mA; confirms suitability for high-speed switching in DC-DC converters up to ~500 kHz.

Pinout & Package

SOT89 (SC-62) plastic surface-mount package: 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, thermally optimized with exposed collector tab for PCB copper mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current return path; connected to ground or low-side reference; requires low-inductance routing in switching nodes.
2	Collector	Main power output terminal; electrically and thermally tied to large PCB copper area (≥6 cm²) for heat extraction and current handling.
3	Base	Control input; driven with ≥200 mA peak for full saturation at 4 A; requires series resistor to limit IB and prevent oscillation.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive use including temperature cycling, HTRB, and ESD testing - eliminates requalification effort for Tier 1 ECUs and ADAS modules.
Low R_CEsat (40–54 mΩ)	Reduces conduction loss by >35% vs. standard bipolar transistors at 4 A, directly lowering board-level thermal management requirements.
High I_C capability (4 A continuous)	Supports direct drive of 12 V/24 V brushless fans and solenoids without paralleling devices or heatsinks in space-constrained modules.
Thermal resistance R_th(j-sp) = 16 K/W	Enables predictable junction-to-solder-point thermal modeling for IPC-2221-compliant PCB layout - critical for production yield and lifetime prediction.
h_FE ≥ 80 at 4 A	Permits use of low-cost microcontroller GPIOs or small logic buffers as base drivers, avoiding dedicated driver ICs in cost-sensitive designs.

Applications

Automotive Fan Driver

Strobe Flash Circuit

Use Scenario: Controlling 12 V/24 V DC cooling fans in engine control units and HVAC modules.

IC Role / Device Role / Timing Role: Medium-power NPN switch turning fan motor on/off via PWM at 1–20 kHz.

Use Value: Low V_CEsat minimizes self-heating during 100% duty cycle; AEC-Q101 qualification ensures 15-year field reliability under thermal shock.

Use Scenario: High-current pulse discharge for camera flash in automotive infotainment and telematics displays.

IC Role / Device Role / Timing Role: Fast-switching NPN switch discharging capacitor bank into xenon/LED array with <100 ns turn-on delay.

Use Value: 10 A peak current rating handles 5 ms flash pulses; low R_CEsat preserves capacitor energy for consistent light intensity.

TFT Display Inverter

LAN/ADSL Power Switch

Use Scenario: Driving cold-cathode fluorescent lamp (CCFL) or LED backlight inverters in automotive instrument clusters.

IC Role / Device Role / Timing Role: High-voltage switching element in half-bridge or flyback topology operating at 50–200 kHz.

Use Value: 80 V V_CEO withstands reflected spikes from transformer leakage; f_T > 120 MHz ensures clean switching edge integrity.

Use Scenario: Enabling/disabling power to Ethernet PHY or ADSL line interface circuits in gateway routers and telematics units.

IC Role / Device Role / Timing Role: Load switch controlling 3.3 V/5 V supply rail with controlled inrush and fast fault response.

Use Value: 4 A rating supports multi-port PoE-powered peripherals; low V_BEsat (<1.05 V) enables direct MCU-level control without level-shifting.

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 NSS40501MUTBG	60 V V_CEO, 4 A I_C, R_CEsat = 55–75 mΩ; SOT-23 package; lower thermal mass.	Limited to 60 V systems; unsuitable for 80 V inverter flyback snubbers or 48 V battery backup rails.	Select only for space-constrained 24 V applications where thermal derating allows 4 A at <85 °C ambient.
Diodes Incorporated DXTN4030Z-13	80 V V_CEO, 4 A I_C, R_CEsat = 45–60 mΩ; SOT-89 package; no AEC-Q101 certification.	Requires additional qualification effort for automotive use; lacks documented thermal resistance data for FR4 mounting.	Acceptable for industrial DC-DC where AEC-Q101 is not mandated; verify R_th(j-a) with actual board layout before volume release.

Compared with NSS40501MUTBG and DXTN4030Z-13, PBSS4480X-Q uniquely combines 80 V rating, AEC-Q101 compliance, and 16 K/W junction-to-solder-point thermal resistance - making it the only drop-in option for automotive fan drivers requiring both voltage margin and thermal predictability on standard FR4.

Availability

PBSS4480X-Q is available at Aetrix Electronics and suitable for automotive fan drivers, strobe flash units, TFT display inverters, and LAN/ADSL power switches requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for PBSS4480X-Q 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, reliable discrete and logic devices for automotive, industrial, and consumer markets.

PBSS4480X-Q belongs to Nexperia's Automotive-Qualified Low-V_CEsat Transistor family, engineered specifically for high-current, thermally demanding switching roles in engine control, body electronics, and infotainment systems.

FAQ

What is the maximum continuous collector current for PBSS4480X-Q under standard PCB conditions?

The PBSS4480X-Q is rated for 4 A continuous collector current when mounted on an FR4 PCB with a 6 cm² tin-plated copper collector pad at Tamb ≤ 25 °C. Derating applies above 25 °C per Figure 1 - e.g., 2.8 A at 85 °C ambient - based on measured P_tot = 1.4 W and R_th(j-a) = 50 K/W.

Does PBSS4480X-Q require a base resistor, and what value is recommended for 4 A switching?

Yes, a base resistor is required to limit peak base current. For 4 A collector current with h_FE ≥ 80, minimum IB = 50 mA is needed; using 3.3 V MCU GPIO, a 47 Ω resistor limits IB to ~60 mA (assuming 0.7 V V_BEsat). For robust saturation at temperature, 33 Ω is recommended to deliver ≥200 mA peak drive per datasheet test condition.

How does the thermal performance of PBSS4480X-Q compare between FR4 and ceramic PCB mounting?

On a 7 cm² ceramic PCB with 1 cm² copper, R_th(j-a) improves to 80 K/W versus 50 K/W on FR4 (6 cm² pad). This yields ~25% higher power handling at 100 °C ambient. However, the 16 K/W R_th(j-sp) remains identical - confirming that solder joint thermal path dominates, not substrate conductivity.

Is PBSS4480X-Q pin-compatible with its PNP complement PBSS5480X?

No - PBSS4480X-Q (NPN) and PBSS5480X (PNP) share the SOT89 package and pin numbering (1=E, 2=C, 3=B), but their terminal polarities differ. In complementary circuits, the PNP must be oriented with emitter and collector swapped relative to the NPN layout, requiring separate footprint routing or dual-layout PCB design.

PBSS4480X-QZ 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 A

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

Vce Saturation (Max) @ Ib, Ic:: 230mV @ 200mA, 4A

Current - Collector Cutoff (Max):: 100nA

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

Power - Max:: 550 mW

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

PBSS4480X-QZ FAQ

1.How can I place an order for PBSS4480X-QZ through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS4480X-QZ 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 PBSS4480X-QZ reliable?

The price and inventory of PBSS4480X-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4480X-QZ is usually 5 days.

3.What payment methods are accepted for PBSS4480X-QZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4480X-QZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS4480X-QZ?

PBSS4480X-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS4480X-QZ 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 PBSS4480X-QZ?

For technical support, including PBSS4480X-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4480X-QZ requirements.

6.How does Aetrix verify that PBSS4480X-QZ is sourced from the original manufacturer or authorized distributors?

All PBSS4480X-QZ 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 PBSS4480X-QZ meets industry standards.

7.What is the process for return or replacement of PBSS4480X-QZ?

All PBSS4480X-QZ units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4480X-QZ, 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 PBSS4480X-QZ part is unused and in its original packaging.

Return procedure for PBSS4480X-QZ:

1.Submit a request within 90 days.

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

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