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

Nexperia USA Inc. BCX54TF

Name: BCX54TF
Brand: Nexperia USA Inc.
SKU: BCX54TF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX54TF

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BCX54TF.pdf

Description:: TRANS NPN 45V 1A SOT-89

Quantity:: RFQ Add To RFQ list

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Inventory:11,590

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Product details

Overview

BCX54TF from Nexperia is a 45 V, 1 A NPN power bipolar transistor in SOT89 (SC-62) surface-mount package, designed for medium-power linear and switching applications including low-side switching, MOSFET gate driving, and linear voltage regulation. It delivers h_FE = 63–250 at I_C = 150 mA, V_CE = 2 V, supports 2 A peak collector current (t_p ≤ 1 ms), and is AEC-Q101 qualified for automotive use.

For engineers reviewing the BCX54TF datasheet, BCX54TF pinout, BCX54TF application, or BCX54TF equivalent, this device is selected for stable DC gain performance across temperature, low V_CE(sat) under 500 mV at I_C = 500 mA / I_B = 50 mA, and thermal robustness on FR4 PCBs with collector pad area optimization.

Technical Context

This NPN power transistor operates as a current-controlled switch or linear amplifier with fixed three-terminal topology. Its design emphasizes high DC current gain consistency across I_C = 5 mA to 500 mA, low saturation voltage under defined base drive, and rugged thermal behavior up to T_j = 150 °C.

It features AEC-Q101 qualification, enabling deployment in automotive power management without derating for stress testing. The SOT89 package provides enhanced thermal dissipation-up to 1100 mW with 6 cm² collector copper pad-while maintaining compact footprint (4.5 mm × 2.5 mm).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-side switch or regulator designs.
I_C	1 A continuous - Sustained collector current capability; sets maximum steady-state load drive capacity.
h_FE	63–250 - DC current gain range at V_CE = 2 V, I_C = 150 mA; enables predictable base drive sizing for switching or amplification.
V_CE(sat)	≤500 mV at I_C = 500 mA, I_B = 50 mA - Low saturation voltage minimizes conduction loss and self-heating in switching applications.
P_tot	1100 mW with 6 cm² collector pad - Maximum power dissipation achievable on standard FR4 PCB; determines thermal margin in linear operation.
f_T	155 MHz - Transition frequency at V_CE = 5 V, I_C = 50 mA; supports moderate-speed switching up to ~10–20 MHz with adequate gain.
R_th(j-a)	114 K/W with 6 cm² pad - Junction-to-ambient thermal resistance; used to calculate ΔT_j = P_diss × R_th(j-a) for reliability analysis.

Pinout & Package

SOT89 (SC-62) plastic surface-mount package: 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, tin-plated terminations, single-sided copper PCB mountable. Collector tab forms exposed metal pad for thermal conduction.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter (E)	Current return path; connected to ground or low-side reference in switch configurations; requires low-impedance trace routing.
2	Collector (C)	Main output current terminal; electrically and thermally tied to large copper pad for heat extraction and current handling.
3	Base (B)	Control input; driven with current-limited source (e.g., resistor from MCU GPIO); sensitive to ESD and overvoltage.

Key Features

Feature	Design Value
High collector current capability	1 A continuous / 2 A pulsed enables direct drive of medium-power loads (e.g., relays, small solenoids) without external buffering.
Three h_FE selections	BCX54T (63–250), BCX54-10T (63–160), BCX54-16T (100–250) allow precise base drive optimization across production batches and operating conditions.
AEC-Q101 qualification	Validated for automotive ambient temperatures (−55 °C to +150 °C) and stress tests, supporting under-hood and body-control module deployment.
Thermal derating support	Power dissipation scales from 500 mW (standard footprint) to 1100 mW (6 cm² pad), enabling flexible layout-driven thermal design without package change.

Applications

Linear Voltage Regulators

MOSFET Drivers

Use Scenario: Pass transistor in adjustable linear regulators delivering up to 1 A output current with <1 % line/load regulation.

IC Role / Device Role / Timing Role: NPN series pass element controlling output voltage via base bias; operates in active region with continuous conduction.

Use Value: Low V_CE(sat) reduces dropout voltage and improves efficiency; high h_FE simplifies error-amplifier drive requirements.

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

IC Role / Device Role / Timing Role: Medium-current NPN switch sourcing gate charge during turn-on and sinking during turn-off (with complementary PNP or resistor).

Use Value: 2 A peak current supports fast MOSFET switching (t_on/t_off < 100 ns typical); AEC-Q101 rating ensures reliability in automotive gate drivers.

Low-Side Switches

Power Management

Use Scenario: High-side load switching replaced by low-side configuration in battery-powered industrial sensors and lighting modules.

IC Role / Device Role / Timing Role: Ground-referenced current switch controlling 12 V/24 V resistive or inductive loads (e.g., fans, valves).

Use Value: 45 V V_CEO accommodates load dump transients; built-in avalanche ruggedness (per AEC-Q101) prevents failure during inductive kickback.

Use Scenario: Power sequencing and enable control in multi-rail embedded systems (e.g., FPGA, microcontroller, PMIC subsystems).

IC Role / Device Role / Timing Role: Discrete enable switch activating downstream LDOs or DC-DC converters based on system state or fault signals.

Use Value: Stable h_FE across −55 °C to +100 °C ensures consistent turn-on timing; SOT89 footprint integrates easily into dense power tree layouts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCX54-16T	Higher minimum h_FE (100 vs. 63) and same V_CEO/I_C; identical SOT89 package and pinout.	Better suited for low-base-drive designs where precise current gain stability is critical (e.g., precision current sources).	Select when guaranteed h_FE ≥100 at I_C = 150 mA is required; otherwise BCX54TF offers broader gain distribution for cost-sensitive volume use.
ZTX653	Higher V_CEO (60 V), higher f_T (175 MHz), but lower I_C (0.5 A) and non-AEC-Q101 rated; TO-92 package.	Preferred in non-automotive, higher-voltage, lower-current analog amplifiers or RF pre-drivers where speed outweighs power.	Choose only for non-automotive designs needing >45 V headroom or >100 MHz bandwidth; not drop-in due to package and qualification mismatch.

Compared with BCX54-16T and ZTX653, BCX54TF balances automotive qualification, 1 A continuous current, and broad h_FE range-making it optimal for cost-effective, thermally constrained, and AEC-compliant low-side switching and regulation where exact gain matching is secondary to robustness and manufacturability.

Availability

BCX54TF is available at Aetrix Electronics and suitable for linear voltage regulators, MOSFET drivers, and low-side switches requiring stable component supply, automotive-grade reliability, and SMT-compatible packaging.

Supply support for BCX54TF 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 specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.

The BCX54T series belongs to Nexperia's AEC-Q101-qualified power transistor portfolio, engineered for robust performance in automotive power management, industrial switching, and consumer power conversion where thermal resilience and parametric consistency are essential.

FAQ

What is the maximum junction temperature and how does it affect thermal design?

The BCX54TF has a maximum junction temperature (T_j) of 150 °C. This limit governs allowable power dissipation based on ambient temperature and PCB thermal design. With R_th(j-a) = 114 K/W using a 6 cm² collector pad, sustained 1 A operation at 45 V would exceed thermal limits-so actual use must stay within P_tot ≤ 1100 mW, verified via board-level thermal simulation or IR imaging.

Is BCX54TF pin-compatible with BCX54-10T and BCX54-16T?

Yes-BCX54TF shares identical SOT89 (SC-62) package dimensions, pin assignment (E-C-B), and solder footprint with BCX54-10T and BCX54-16T. All three are mechanically and electrically interchangeable on PCBs; only h_FE distribution differs, requiring no layout change but possibly minor base resistor adjustment in gain-critical circuits.

Does BCX54TF support pulsed operation beyond its DC ratings?

Yes-it supports 2 A peak collector current (I_CM) for single pulses ≤1 ms, provided duty cycle remains low enough to avoid junction temperature accumulation. Transient thermal impedance curves (Fig. 2–4) confirm effective heat spreading over short durations, enabling brief overload tolerance in motor start-up or surge protection circuits.

How does AEC-Q101 qualification impact BCX54TF's use in non-automotive applications?

AEC-Q101 qualification subjects BCX54TF to accelerated stress tests (HTOL, TC, HAST, etc.) far exceeding standard industrial requirements. In non-automotive use, this translates to extended field lifetime, improved parametric stability over time/temperature, and reduced infant mortality-especially valuable in medical, industrial, and infrastructure equipment where long-term unattended operation is critical.

BCX54TF 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):: 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:: 500 mW

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

BCX54TF FAQ

1.How can I place an order for BCX54TF through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX54TF 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 BCX54TF reliable?

The price and inventory of BCX54TF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX54TF is usually 5 days.

3.What payment methods are accepted for BCX54TF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX54TF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX54TF?

BCX54TF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX54TF 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 BCX54TF?

For technical support, including BCX54TF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX54TF requirements.

6.How does Aetrix verify that BCX54TF is sourced from the original manufacturer or authorized distributors?

All BCX54TF 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 BCX54TF meets industry standards.

7.What is the process for return or replacement of BCX54TF?

All BCX54TF units undergo pre-shipment inspection (PSI). If there is an issue with BCX54TF, 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 BCX54TF part is unused and in its original packaging.

Return procedure for BCX54TF:

1.Submit a request within 90 days.

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

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