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

Nexperia USA Inc. BC54-16PA-QX

Name: BC54-16PA-QX
Brand: Nexperia USA Inc.
SKU: BC54-16PA-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC54-16PA-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: 3-PowerUDFN

Datasheet:: BC54-16PA-QX.pdf

Description:: TRANS NPN 45V 1A 3HUSON

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC54-16PA-QX from Nexperia is an AEC-Q101-qualified NPN medium power transistor in SOT1061 ultra-thin leadless package, rated for 45 V V_CEO, 1 A continuous I_C, and 250 h_FE at I_C = 150 mA / V_CE = 2 V. It serves as a low-side switch or MOSFET driver in automotive power management circuits with high thermal efficiency on FR4 PCBs.

For engineers reviewing the BC54-16PA-QX datasheet, BC54-16PA-QX pinout, BC54-16PA-QX application, or BC54-16PA-QX equivalent, this page delivers verified electrical parameters, automotive-grade qualification status, thermal derating curves, SOT1061 footprint details, and real-world use cases in linear regulators and battery-driven systems.

Technical Context

This transistor operates as a silicon NPN bipolar junction device optimized for medium-power switching and amplification. Its design supports pulsed I_CM up to 2 A (tp ≤ 1 ms) and maintains h_FE stability across −55 °C to +150 °C ambient range, with V_BE ≈ 1 V and V_CE(sat) ≤ 0.5 V at I_C/I_B = 10.

The SOT1061 package enables high power density via thermal enhancement: R_th(j-a) drops from 289 K/W (standard FR4) to 76 K/W when mounted on 4-layer PCB with 1 cm² collector pad - critical for sustained 1 A operation in space-constrained automotive modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - maximum safe collector-emitter voltage with base open; defines breakdown margin in 12 V/24 V automotive rail switching.
I_C (continuous)	1 A - steady-state collector current capability; supports load switching in battery management and regulator feedback paths.
h_FE	100–250 at V_CE = 2 V, I_C = 150 mA - tight DC current gain binning ensures predictable base drive sizing for low-side drivers.
V_CE(sat)	≤ 0.5 V at I_C = 500 mA, I_B = 50 mA - low saturation voltage minimizes conduction loss in high-duty-cycle switching applications.
P_tot (max)	1.65 W on 4-layer FR4 with 1 cm² collector pad - enables >1 A pulsed operation without external heatsinking in compact ECUs.
f_T	100–180 MHz - sufficient bandwidth for audio amplification and fast-switching control loops in power converters.
AEC-Q101	Qualified - meets stress test requirements for discrete semiconductors in automotive environments including temperature cycling and HTRB.

Pinout & Package

SOT1061 is a 3-terminal, leadless, ultra-thin (0.65 mm max height) surface-mount plastic package with 2 mm × 2 mm body size and exposed collector pad for thermal conduction. It features tin-plated terminations compatible with standard reflow profiles (J-STD-020).

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires ~50 mA base drive for full 500 mA collector conduction at low V_CE(sat).
2	Emiter (E)	Reference terminal tied to ground or low-side return path; forms common-emitter configuration with defined current gain.
3	Collector (C)	High-current output node; thermally connected to PCB copper pad to dissipate up to 1.65 W in optimized layout.

Key Features

Feature	Design Value
Three h_FE bins	BC54-16PA-QX offers 100–250 h_FE, enabling precise base resistor selection without overdesign or gain variation risk.
AEC-Q101 qualification	Validated for automotive underhood applications including engine control, lighting, and body electronics per stress test standards.
Thermal-enhanced SOT1061	Reduces R_th(j-a) by >70% vs. standard SOT23, supporting 1 A continuous operation without heatsink in space-limited modules.
Low V_CE(sat)	≤0.5 V at I_C/I_B = 10 ensures <500 mW conduction loss at 1 A, improving efficiency in battery-powered linear regulators.
High f_T	180 MHz typical transition frequency allows stable operation in audio preamps and fast PWM gate driving up to ~10 MHz.

Applications

Linear Voltage Regulators

MOSFET Drivers

Use Scenario: Pass transistor in adjustable LDOs for automotive infotainment power rails.

IC Role / Device Role / Timing Role: NPN emitter-follower configured as series pass element controlling output voltage via feedback loop.

Use Value: Low V_CE(sat) reduces dropout voltage; high h_FE minimizes base drive current, lowering quiescent consumption.

Use Scenario: Driving N-channel logic-level MOSFET gates in 12 V automotive motor control stages.

IC Role / Device Role / Timing Role: Low-side switch that sinks gate charge during turn-off and provides fast discharge path.

Use Value: 2 A peak I_CM handles large transient gate currents; 180 MHz f_T ensures sub-100 ns switching transitions.

Low-Side Switches

Battery-Driven Devices

Use Scenario: Load switching for HVAC actuators and LED matrix backlights in vehicle cabins.

IC Role / Device Role / Timing Role: Directly controlled NPN switch connecting loads to ground under MCU GPIO command.

Use Value: AEC-Q101 rating guarantees reliability across −40 °C to +125 °C; SOT1061 footprint saves board area vs. TO-236.

Use Scenario: Power path control in portable diagnostic tools and telematics dongles powered by 12 V vehicle sockets.

IC Role / Device Role / Timing Role: Enables/disables subsystem power using MCU-controlled base bias, with reverse polarity protection.

Use Value: 45 V V_CEO withstands load dump transients up to ISO 7637-2 Pulse 5a; low standby leakage (<100 nA) preserves battery life.

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
BC54-10PA-Q	h_FE = 63–160 (lower mid-range gain bin); identical V_CEO, I_C, package, and qualification.	Suitable where lower gain tolerance is acceptable and base drive margin is ample; less sensitive to base resistor tolerance.	Select when designing for cost-sensitive automotive modules where tighter h_FE control is unnecessary.
BC817-40,215	Same SOT-23 package but lower P_tot (0.5 W), lower I_C (0.5 A), no AEC-Q101 qualification, h_FE = 250–630.	Limited to non-automotive consumer or industrial applications; unsuitable for underhood temperature or reliability requirements.	Use only in commercial-grade products where AEC-Q101 is not mandated and thermal budget is constrained.

Compared with BC54-10PA-Q, BC54-16PA-QX provides higher guaranteed h_FE for reduced base drive sensitivity; versus BC817-40, it delivers 2× continuous current, 3.3× power dissipation, and automotive qualification - making it the sole choice for AEC-compliant 1 A switching.

Availability

BC54-16PA-QX is available at Aetrix Electronics and suitable for automotive power management, battery-driven diagnostics, and MOSFET gate driving requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BC54-16PA-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, reliable discrete and logic devices for automotive, industrial, and mobile markets.

The BC54PA-Q series targets automotive-grade medium-power analog switching, designed specifically to replace legacy TO-92 and SOT-23 transistors with enhanced thermal performance and AEC-Q101 compliance in ultra-thin SMT packages.

FAQ

What is the maximum allowable junction temperature for BC54-16PA-QX?

The absolute maximum junction temperature (T_j) is 150 °C per IEC 60134 limiting values. Operation above this threshold risks permanent degradation of h_FE and increased leakage. Derating is required above 25 °C ambient - e.g., P_tot must be reduced to 1.10 W at 75 °C ambient on standard FR4 PCB.

Does BC54-16PA-QX support pulse operation beyond its continuous current rating?

Yes - it supports I_CM = 2 A for single pulses ≤1 ms (duty cycle ≤0.02). This enables short-duration surge handling in motor startup or capacitor charging circuits, provided thermal mass and PCB layout prevent cumulative heating beyond T_j = 150 °C.

How does the SOT1061 package improve thermal performance over SOT-23?

SOT1061 uses an exposed collector pad directly soldered to PCB copper, reducing R_th(j-a) from 289 K/W (SOT-23 equivalent) to 76 K/W with 4-layer board and 1 cm² pad - a 3.8× improvement. This allows 1 A continuous operation without heatsink where SOT-23 would require forced cooling or derating to ~300 mA.

Is BC54-16PA-QX pin-compatible with other BC54 variants?

Yes - all BC54PA-Q series parts (BC54-10PA-Q, BC54-16PA-Q, BC54-25PA-Q) share identical SOT1061 pinout (B-E-C), marking codes, and mechanical dimensions. Only h_FE binning differs; substitution requires verification of gain requirements in the target circuit's base drive network.

BC54-16PA-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:: 100 @ 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)

BC54-16PA-QX FAQ

1.How can I place an order for BC54-16PA-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BC54-16PA-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 BC54-16PA-QX reliable?

The price and inventory of BC54-16PA-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC54-16PA-QX is usually 5 days.

3.What payment methods are accepted for BC54-16PA-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC54-16PA-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC54-16PA-QX?

BC54-16PA-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC54-16PA-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 BC54-16PA-QX?

For technical support, including BC54-16PA-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC54-16PA-QX requirements.

6.How does Aetrix verify that BC54-16PA-QX is sourced from the original manufacturer or authorized distributors?

All BC54-16PA-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 BC54-16PA-QX meets industry standards.

7.What is the process for return or replacement of BC54-16PA-QX?

All BC54-16PA-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC54-16PA-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 BC54-16PA-QX part is unused and in its original packaging.

Return procedure for BC54-16PA-QX:

1.Submit a request within 90 days.

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

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