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

Nexperia USA Inc. BC54-10PA-QX

Name: BC54-10PA-QX
Brand: Nexperia USA Inc.
SKU: BC54-10PA-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC54-10PA-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: 3-PowerUDFN

Datasheet:: BC54-10PA-QX.pdf

Description:: TRANS NPN 45V 1A 3HUSON

Quantity:: RFQ Add To RFQ list

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Inventory:5,047

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Product details

Overview

BC54-10PA-QX from Nexperia is a 45 V, 1 A NPN medium power transistor in an ultra-thin SOT1061 leadless surface-mount package, designed for automotive-grade linear voltage regulation, MOSFET gate driving, and low-side switching. It features h_FE = 63–160 at V_CE = 2 V / I_C = 150 mA, AEC-Q101 qualification, and 1.65 W total power dissipation on 4-layer FR4 PCB with collector pad.

For engineers reviewing the BC54-10PA-QX datasheet, BC54-10PA-QX pinout, BC54-10PA-QX application, or BC54-10PA-QX equivalent, this device is selected for stable current gain across temperature, high peak pulse capability (I_CM = 2 A), and thermal performance validated under automotive ambient conditions (−55 °C to 150 °C).

Technical Context

This NPN bipolar junction transistor operates as a current-controlled switch or linear amplifier with fixed emitter-base and collector-base breakdown voltages (V_(BR)EBO = 5 V, V_(BR)CBO = 45 V). Its DC current gain is binned per variant-BC54-10PA-QX specifies h_FE = 63–160 at I_C = 150 mA, enabling predictable base drive sizing in driver circuits.

Thermal design relies on defined R_th(j-a) values: 76 K/W on 4-layer FR4 with 1 cm² collector pad, and 289 K/W on standard single-sided footprint. Saturation voltage is specified at V_CE(sat) ≤ 0.5 V (I_C = 500 mA, I_B = 50 mA), supporting efficient low-side switching below 1 A continuous load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum safe collector-emitter voltage with open base; defines maximum supply rail compatibility in switching applications.
I_C	1 A - Continuous collector current rating; sets upper bound for steady-state load handling in regulators or drivers.
h_FE	63–160 - Confirmed DC current gain range at V_CE = 2 V / I_C = 150 mA; enables precise base resistor calculation for saturation control.
V_CE(sat)	≤ 0.5 V - Verified saturation voltage at I_C = 500 mA / I_B = 50 mA; ensures <1.5 W conduction loss in low-side switch operation.
P_tot	1.65 W - Max power dissipation on 4-layer FR4 with 1 cm² collector pad; determines heatsinking requirements for thermal margin.
R_th(j-a)	76 K/W - Junction-to-ambient thermal resistance under optimized layout; supports junction temperature prediction under real PCB conditions.
AEC-Q101	Qualified - Validated for automotive discrete stress testing including HTGB, HTRB, and ESD; meets automotive reliability requirements.

Pinout & Package

SOT1061 is a 3-terminal, leadless, ultra-thin plastic package (2.0 × 2.0 × 0.65 mm) with exposed collector pad for enhanced thermal conduction. The body uses standard FR4-compatible reflow footprint per Figure 12.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires series resistor to limit I_B ≤ 0.3 A (absolute max) for reliable switching.
2	Emitter (E)	Reference terminal for biasing; connected to ground or low-side return path in common-emitter configurations.
3	Collector (C)	Main current-carrying output; electrically and thermally tied to exposed bottom pad for PCB heat spreading.

Key Features

Feature	Design Value
Three h_FE bins	BC54-10PA-QX offers 63–160 gain range-enables consistent base drive design across production lots without recalibration.
AEC-Q101 qualification	Validated for automotive use including temperature cycling, humidity, and high-temperature reverse bias-supports Tier-1 BOM inclusion.
Ultra-thin SOT1061	0.65 mm profile enables space-constrained layouts in battery management and infotainment modules where Z-height is critical.
High I_CM	2 A peak collector current (t_p ≤ 1 ms) allows robust handling of inrush or fault currents in power management stages.
Optimized thermal pad	Exposed collector pad delivers 76 K/W R_th(j-a) on 4-layer boards-reduces thermal derating vs. legacy SOT23/SOT223 packages.

Applications

Linear Voltage Regulators

MOSFET Drivers

Use Scenario: Pass transistor in adjustable LDOs delivering up to 1 A output current with thermal foldback protection.

IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias; operates in linear region with V_CE dynamically adjusted.

Use Value: Stable h_FE binning ensures predictable dropout voltage and thermal response across temperature (−55 °C to 150 °C).

Use Scenario: Gate driver stage for N-channel power MOSFETs in motor control or DC-DC converters.

IC Role / Device Role / Timing Role: Low-side switch providing fast turn-on/turn-off of MOSFET gate capacitance with controlled I_B.

Use Value: V_CE(sat) ≤ 0.5 V minimizes driver-stage conduction loss; 2 A I_CM handles gate charge surge during hard switching.

Low-Side Switches

Battery-Driven Devices

Use Scenario: Load switch for 12 V automotive accessories (e.g., fans, solenoids) with enable/disable control.

IC Role / Device Role / Timing Role: Saturated NPN switch connecting load to ground; driven by microcontroller GPIO or logic signal.

Use Value: Confirmed 1 A continuous rating and AEC-Q101 qualification ensure reliability in cyclic load environments.

Use Scenario: Power path control in portable medical monitors or handheld test equipment powered by Li-ion batteries.

IC Role / Device Role / Timing Role: Reverse-polarity protection or battery isolation switch operating at ≤ 45 V system voltage.

Use Value: Ultra-thin SOT1061 footprint saves board area; low V_CE(sat) extends battery runtime by reducing conduction losses.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC54-16PA-Q	Higher h_FE bin: 100–250 at I_C = 150 mA; otherwise identical ratings and package.	Preferred where lower base drive current is required (e.g., weak GPIO sources); same thermal and voltage specs.	Select when minimizing I_B improves system efficiency or simplifies bias network design.
ZTX653	TO-92 package; higher V_CEO = 60 V; h_FE = 100–300; P_tot = 1 W (free air); no AEC-Q101 qualification.	Used in non-automotive industrial controls; unsuitable for space-constrained or automotive-qualified designs.	Choose only for cost-sensitive, non-automotive prototypes where through-hole assembly is acceptable.

Compared with BC54-10PA-QX, BC54-16PA-Q offers higher gain for reduced base drive burden, while ZTX653 trades automotive qualification and SMT compatibility for higher voltage headroom and legacy through-hole fit.

Availability

BC54-10PA-QX is available at Aetrix Electronics and suitable for automotive power management, battery-driven instrumentation, and industrial linear regulator designs requiring stable component supply, AEC-Q101 compliance, and ultra-thin SMT packaging.

Supply support for BC54-10PA-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 high-volume, high-reliability essential semiconductors-including logic, discretes, MOSFETs, and ESD protection devices.

The BC54PA-Q series targets automotive and industrial power control applications, delivering AEC-Q101-qualified medium-power transistors with optimized thermal performance in ultra-thin SMT packages.

FAQ

What is the maximum allowable base current for BC54-10PA-QX?

The absolute maximum DC base current is 0.3 A, and peak base current is also limited to 0.3 A for pulses ≤1 ms. Exceeding these values risks bond wire failure or gain degradation. For typical switching operation at I_C = 500 mA, I_B = 50 mA is sufficient to ensure saturation with margin.

Is BC54-10PA-QX suitable for linear amplifier applications?

Yes-it is characterized for linear operation with h_FE specified at multiple I_C points (5 mA, 150 mA, 500 mA) and exhibits stable gain over −55 °C to 100 °C. However, its 1.65 W P_tot limit and thermal resistance require careful heatsinking in Class-A amplifier stages.

How does the SOT1061 package improve thermal performance over SOT23?

SOT1061's exposed collector pad reduces R_th(j-a) to 76 K/W (vs. ~200 K/W for standard SOT23), enabling 2.2× higher power dissipation on equivalent 4-layer PCBs. This is achieved via direct copper contact between the die attach and PCB thermal plane, not just package thickness reduction.

Does BC54-10PA-QX have built-in ESD protection?

No-this is a bare-die bipolar transistor without integrated ESD structures. Per Nexperia's datasheet, it has CDM ESD rating of Class 2 (≥500 V), but external TVS or RC filtering is recommended in high-noise automotive environments to protect the base-emitter junction (V_EBO = 5 V max).

BC54-10PA-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 3-PowerUDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 63 @ 150mA, 2V

Power - Max:: 420 mW

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: 3-HUSON (2x2)

BC54-10PA-QX FAQ

1.How can I place an order for BC54-10PA-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BC54-10PA-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 BC54-10PA-QX reliable?

The price and inventory of BC54-10PA-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC54-10PA-QX is usually 5 days.

3.What payment methods are accepted for BC54-10PA-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC54-10PA-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC54-10PA-QX?

BC54-10PA-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC54-10PA-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 BC54-10PA-QX?

For technical support, including BC54-10PA-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC54-10PA-QX requirements.

6.How does Aetrix verify that BC54-10PA-QX is sourced from the original manufacturer or authorized distributors?

All BC54-10PA-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 BC54-10PA-QX meets industry standards.

7.What is the process for return or replacement of BC54-10PA-QX?

All BC54-10PA-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC54-10PA-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 BC54-10PA-QX part is unused and in its original packaging.

Return procedure for BC54-10PA-QX:

1.Submit a request within 90 days.

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

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