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

Nexperia USA Inc. BCP54-QF

Name: BCP54-QF
Brand: Nexperia USA Inc.
SKU: BCP54-QF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP54-QF

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: BCP54-QF.pdf

Description:: TRANS NPN 45V 1A SOT-223

Quantity:: RFQ Add To RFQ list

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Inventory:8,488

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Product details

Overview

BCP54-Q from Nexperia is an AEC-Q101-qualified NPN medium power transistor in SOT223 (SC-73) package, rated for 45 V V_CEO, 1 A continuous collector current, and 1.35 W power dissipation with 6 cm² heatsink pad. It delivers h_FE of 63–250 at I_C = 150 mA and supports linear voltage regulation and MOSFET gate driving in automotive power management systems.

For engineers reviewing the BCP54-Q datasheet, BCP54-Q pinout, BCP54-Q application, or BCP54-Q equivalent, this part is selected for low-side switching, battery-driven DC-DC stages, and thermally constrained amplifier biasing where automotive-grade reliability and SOT223 thermal performance are required.

Technical Context

The BCP54-Q operates as a single NPN bipolar junction transistor optimized for medium-power linear and switching applications. Its 45 V V_CEO rating enables use in 24 V automotive supply rails, while its 2 A peak collector current (t_p ≤ 1 ms) supports transient load handling in power management circuits.

Thermal design relies on the SOT223 package's dual-collector configuration (pins 2 and 4), enabling direct PCB copper pour attachment to reduce R_th(j-a) to 93 K/W with 6 cm² mounting pad. The device exhibits f_T = 100–180 MHz and V_CE(sat) ≤ 0.5 V at I_C = 500 mA / I_B = 50 mA, supporting efficient switching in driver stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Supports operation across 24 V automotive systems with margin against load-dump transients.
I_C (continuous)	1 A - Enables direct drive of small solenoids, LED strings, or MOSFET gates without external buffering.
h_FE	63–250 @ V_CE = 2 V, I_C = 150 mA - Provides stable current amplification for feedback loops in linear regulators.
P_tot (max)	1.35 W @ T_amb ≤ 25 °C with 6 cm² copper pad - Delivers usable power density in space-constrained SMT layouts.
f_T	100–180 MHz @ V_CE = 5 V, I_C = 50 mA - Ensures adequate bandwidth for high-speed switching in gate driver applications.
V_CE(sat)	≤ 0.5 V @ I_C = 500 mA, I_B = 50 mA - Minimizes conduction loss in low-side switch configurations.
R_th(j-a)	93 K/W with 6 cm² FR4 copper pad - Enables junction temperature control below 150 °C under sustained 1 A load.

Pinout & Package

SOT223 (SC-73) surface-mount plastic package with integrated heatsink tab (pin 2 and pin 4 both connected to collector); 4-pin outline with exposed collector pad for thermal enhancement.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input requiring ~50 mA base drive for full saturation at 500 mA collector current.
2	Collector	Main high-current output terminal; electrically tied to pin 4 and thermal pad for simultaneous conduction and heat transfer.
3	Emiter	Reference node for emitter-follower or grounded-emitter configurations; connects to system ground or load return path.
4	Collector	Duplicate collector connection reinforcing thermal and electrical path to PCB copper pour; not isolated or auxiliary.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock per JESD22 standards.
Three h_FE variants	BCP54-Q (63–250), BCP54-10-Q (63–160), BCP54-16-Q (100–250) - Enables precise gain matching in production batches for analog feedback stability.
Dual-collector thermal design	Pins 2 and 4 both connect to collector and thermal pad - Reduces thermal resistance by up to 30% vs. standard SOT223 when using ≥6 cm² copper area.
High peak current capability	I_CM = 2 A (t_p ≤ 1 ms) - Supports surge handling in motor startup or capacitor charging circuits without secondary protection.

Applications

Linear Voltage Regulators

MOSFET Drivers

Use Scenario: Pass transistor in adjustable 3-terminal linear regulator supplying 5 V/1 A to infotainment microcontrollers.

IC Role / Device Role / Timing Role: NPN series pass element controlling output voltage via base bias from error amplifier.

Use Value: Low V_CE(sat) minimizes dropout voltage; h_FE spread allows gain tuning to stabilize loop response across temperature.

Use Scenario: Gate driver stage for 40 V N-channel MOSFET in automotive DC-DC buck converter.

IC Role / Device Role / Timing Role: Medium-power NPN switch sourcing gate current during turn-on and sinking during turn-off via complementary pair.

Use Value: 180 MHz f_T ensures fast edge rates; dual-collector layout sustains 1 A pulsed gate charge without thermal throttling.

Low-Side Switches

Battery-Driven Devices

Use Scenario: Load switch controlling 12 V fan in engine control unit with PWM dimming.

IC Role / Device Role / Timing Role: Ground-referenced NPN switch turning on/off motor current path based on MCU GPIO signal.

Use Value: 45 V V_CEO withstands back-EMF spikes; 2 A I_CM accommodates fan stall current without derating.

Use Scenario: Power enable switch in portable diagnostic tool powered by 18650 Li-ion battery pack.

IC Role / Device Role / Timing Role: Battery isolation transistor activated only during active measurement cycles to extend standby life.

Use Value: Low I_CBO (≤100 nA) prevents parasitic drain; AEC-Q101 qualification ensures reliability over 10-year field deployment.

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
BCP56-Q	Higher V_CEO = 60 V; same SOT223 package and h_FE range; P_tot = 1.35 W.	Required where 48 V systems or higher transient immunity is needed beyond 45 V.	Select BCP56-Q only if system-level overvoltage exceeds 45 V; otherwise BCP54-Q offers better cost/performance fit for 24 V platforms.
ZTX653	TO-92 package; V_CEO = 60 V; h_FE = 100–300; P_tot = 1.0 W; no AEC-Q101 qualification.	Used in non-automotive industrial controls where manual assembly or through-hole mounting is preferred.	Choose ZTX653 for prototyping or legacy through-hole designs; avoid in automotive due to missing AEC-Q101 and lower thermal capability.

Compared with BCP56-Q, BCP54-Q trades 15 V breakdown margin for tighter gain binning and optimized thermal behavior in SOT223; versus ZTX653, it provides automotive qualification, superior power dissipation, and surface-mount scalability at the cost of TO-92 legacy compatibility.

Availability

BCP54-Q is available at Aetrix Electronics and suitable for automotive power management, battery-powered instrumentation, and industrial linear regulator designs requiring stable component supply and AEC-Q101 compliance.

Supply support for BCP54-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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The BCP54-Q belongs to Nexperia's AEC-Q101-qualified medium-power bipolar transistor product line, engineered specifically for robust linear regulation, switching, and driver functions in harsh automotive environments.

FAQ

Is BCP54-Q suitable for use in automotive under-hood applications?

Yes. BCP54-Q is qualified to AEC-Q101 with operating ambient temperature range of −55 °C to +150 °C and validated for thermal cycling, humidity, and mechanical shock. Its 45 V V_CEO, 150 °C T_j(max), and SOT223 thermal design meet under-hood requirements for engine control modules and body electronics.

What is the function of pin 4 on the BCP54-Q?

Pin 4 is a second collector terminal electrically and thermally connected to pin 2 and the internal die's collector metallization. It is not a separate signal or auxiliary function-it reinforces the collector-to-PCB thermal and current path, enabling lower R_th(j-a) when routed to copper pour.

How does h_FE variation affect circuit design with BCP54-Q?

BCP54-Q has h_FE = 63–250 at I_C = 150 mA, requiring base drive design to ensure saturation across the full range. For critical linear applications, use the BCP54-10-Q (63–160) or BCP54-16-Q (100–250) variants to narrow gain spread and improve consistency in feedback loops or current mirrors.

Can BCP54-Q replace BC817 in SOT23 packages?

No. BCP54-Q is a medium-power SOT223 device rated for 1 A continuous current and 1.35 W dissipation, whereas BC817 is a low-power SOT23 transistor rated for 500 mA and 350 mW. The package, thermal capability, and current handling differ fundamentally-direct substitution would risk thermal failure or insufficient drive strength.

BCP54-QF Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-261-4, TO-261AA

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:: 650 mW

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

BCP54-QF FAQ

1.How can I place an order for BCP54-QF through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP54-QF 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 BCP54-QF reliable?

The price and inventory of BCP54-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP54-QF is usually 5 days.

3.What payment methods are accepted for BCP54-QF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP54-QF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP54-QF?

BCP54-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP54-QF 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 BCP54-QF?

For technical support, including BCP54-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP54-QF requirements.

6.How does Aetrix verify that BCP54-QF is sourced from the original manufacturer or authorized distributors?

All BCP54-QF 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 BCP54-QF meets industry standards.

7.What is the process for return or replacement of BCP54-QF?

All BCP54-QF units undergo pre-shipment inspection (PSI). If there is an issue with BCP54-QF, 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 BCP54-QF part is unused and in its original packaging.

Return procedure for BCP54-QF:

1.Submit a request within 90 days.

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

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