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

Nexperia USA Inc. BCW66HVL

Name: BCW66HVL
Brand: Nexperia USA Inc.
SKU: BCW66HVL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCW66HVL

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BCW66HVL.pdf

Description:: TRANS NPN 45V 0.8A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:82,501

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Product details

Overview

BCW66HVL from Nexperia is an AEC-Q101 qualified NPN general-purpose transistor in SOT23 (TO-236AB) package, rated for 45 V V_CEO, 800 mA continuous collector current, and 250–600 h_FE at I_C = 100 mA / V_CE = 1 V. It serves as a robust switching and amplification device in automotive body electronics, LED drivers, and power management stages where high-current gain and thermal reliability are required.

For engineers reviewing the BCW66HVL datasheet, BCW66HVL pinout, BCW66HVL application, or BCW66HVL equivalent, key selection criteria include its AEC-Q101 qualification, 45 V breakdown voltage, 800 mA DC current rating, SOT23 footprint compatibility, and h_FE performance across temperature extremes (−55 °C to +150 °C).

Technical Context

This discrete NPN bipolar junction transistor operates in linear or saturated switching modes with base-controlled current amplification. Its design supports stable DC gain (h_FE) from 250 to 600 under pulsed conditions (t_p ≤ 300 μs, duty ≤ 0.02), and maintains low V_CE(sat) ≤ 450 mV at I_C = 500 mA / I_B = 50 mA.

Thermal performance is defined by R_th(j-a) = 500 K/W on FR4 PCB with standard footprint, enabling operation up to T_j = 150 °C. The device meets automotive stress-test requirements per AEC-Q101, including HTOL, temperature cycling, and HTRB.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum safe collector-emitter voltage with base open; defines usable supply rail headroom in switching applications.
I_C	800 mA - Continuous DC collector current rating; supports medium-power load switching without forced cooling.
h_FE	250–600 - DC current gain at V_CE = 1 V, I_C = 100 mA, T_amb = 25 °C; enables low-base-drive designs in amplifier and switch configurations.
V_CE(sat)	≤ 450 mV - Collector-emitter saturation voltage at I_C = 500 mA / I_B = 50 mA; minimizes conduction loss in high-duty-cycle switching.
P_tot	250 mW - Total power dissipation at T_amb ≤ 25 °C on FR4 PCB; sets thermal derating baseline for ambient temperature design margins.
f_T	100 MHz - Transition frequency at V_CE = 5 V, I_C = 10 mA; supports audio-frequency amplification and fast digital switching.

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; compact 2.9 mm × 1.3 mm footprint, 1.1 mm height, and gull-wing terminations compatible with reflow and wave soldering per IPC-7351A.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires ~10 mA drive for full saturation at 500 mA collector load.
2	Emitter (E)	Reference terminal for biasing; connected to ground or low-side return path in common-emitter configurations.
3	Collector (C)	High-current output node; handles up to 800 mA DC load and 1 A peak pulses (t_p ≤ 1 ms).

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use per stress-test requirements including HTOL, temperature cycling, and HTRB.
High h_FE range	250–600 at I_C = 100 mA ensures reliable turn-on with minimal base drive in space-constrained PCB layouts.
Low V_CE(sat)	≤ 450 mV at I_C = 500 mA reduces power loss and self-heating during sustained conduction.
Thermal robustness	R_th(j-a) = 500 K/W on standard FR4 allows operation up to 150 °C junction temperature in sealed enclosures.
SOT23 compatibility	Industry-standard footprint enables drop-in replacement and automated assembly with existing pick-and-place tooling.

Applications

Automotive Door Module Switching

Industrial LED Driver Stage

Use Scenario: Controlling window lift motors, mirror actuators, and interior lighting loads in vehicle door modules.

IC Role / Device Role / Timing Role: NPN switch driving resistive/inductive loads directly from microcontroller GPIO pins.

Use Value: AEC-Q101 qualification ensures long-term reliability under vibration and thermal cycling; 45 V rating accommodates 12 V automotive transients.

Use Scenario: Constant-current switching stage for multi-segment LED arrays in factory signage and control panels.

IC Role / Device Role / Timing Role: Medium-current pass element regulating LED string current via PWM-controlled base drive.

Use Value: 800 mA I_C rating supports up to 12 parallel LEDs per channel; low V_CE(sat) limits thermal rise in enclosed fixtures.

Consumer Power Supply Enable

Medical Sensor Signal Amplifier

Use Scenario: Enabling/disabling auxiliary rails (e.g., 5 V standby, 3.3 V logic) in AC-DC adapters and USB-C PD accessories.

IC Role / Device Role / Timing Role: Low-side enable switch placed between regulator output and downstream load.

Use Value: Fast turn-on/off (enabled by f_T = 100 MHz) supports dynamic power sequencing; SOT23 size saves board area in compact adapters.

Use Scenario: Small-signal preamplifier for thermistor or photodiode outputs in portable diagnostic devices.

IC Role / Device Role / Timing Role: Common-emitter amplifier providing 20–40 dB voltage gain before ADC input.

Use Value: Stable h_FE over −55 °C to +125 °C ensures consistent gain across clinical operating environments; low noise supports µV-level signal integrity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCW66H	Identical electrical specs and package; differs only in marking code (ES% vs VL) and internal lot traceability.	No functional difference; both meet AEC-Q101 and share identical limiting values and characteristics.	Select BCW66HVL when explicit VL-grade traceability or regional compliance documentation is required.
MMBT3904LT1G	Lower V_CEO (40 V), lower h_FE (100–300), same SOT23 package; not AEC-Q101 qualified.	Suitable for commercial-grade consumer electronics but not automotive or industrial safety-critical systems.	Choose MMBT3904LT1G only for cost-sensitive non-automotive designs where 45 V margin and AEC qualification are unnecessary.

Compared with BCW66H, BCW66HVL offers identical performance with enhanced traceability; versus MMBT3904LT1G, it delivers higher voltage margin, broader h_FE, and certified automotive reliability-critical for mission-relevant switching in harsh environments.

Availability

BCW66HVL is available at Aetrix Electronics and suitable for automotive body electronics, industrial LED drivers, consumer power supply enable circuits, and medical sensor amplifiers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BCW66HVL 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 energy-efficient solutions.

The BCW66 series belongs to Nexperia's AEC-Q101 qualified general-purpose transistor product line, engineered for robust switching and amplification in automotive, industrial, and medical applications demanding proven reliability and thermal stability.

FAQ

Is BCW66HVL pin-compatible with BCW66H?

Yes, BCW66HVL uses the identical SOT23 (TO-236AB) package and pinout (1 = Base, 2 = Emitter, 3 = Collector) as BCW66H. Both share identical absolute maximum ratings, electrical characteristics, and thermal behavior. The VL suffix denotes a specific manufacturing grade with enhanced traceability documentation, not a physical or electrical variant.

What is the maximum allowable base current for continuous operation?

The absolute maximum DC base current (I_B) is 100 mA per the datasheet Limiting Values table. For reliable continuous operation, design base drive to stay below 50 mA while ensuring sufficient I_B to maintain saturation-e.g., 50 mA base current supports 500 mA collector current with V_CE(sat) ≤ 450 mV.

Can BCW66HVL be used in linear amplifier configurations?

Yes, BCW66HVL supports linear operation with verified h_FE stability across I_C = 100 μA to 500 mA and temperature range −55 °C to +150 °C. Its f_T = 100 MHz and low C_c = 3 pF make it suitable for audio-frequency amplification, though thermal derating must be applied above 25 °C ambient due to P_tot = 250 mW.

Does BCW66HVL require heatsinking in typical SOT23 applications?

No external heatsink is required for typical operation. At 800 mA I_C and 450 mV V_CE(sat), power dissipation is ~360 mW-exceeding the 250 mW P_tot rating at 25 °C ambient. However, the device remains within safe operating area when operated at reduced I_C (e.g., 500 mA yields ~225 mW) or with proper PCB copper pour (≥ 1 cm²) for passive thermal spreading.

BCW66HVL Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 800 mA

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

Vce Saturation (Max) @ Ib, Ic:: 450mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: 5µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 100mA, 1V

Power - Max:: 250 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BCW66HVL FAQ

1.How can I place an order for BCW66HVL through Aetrix?

Please submit a Request for Quotation (RFQ) for BCW66HVL 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 BCW66HVL reliable?

The price and inventory of BCW66HVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCW66HVL is usually 5 days.

3.What payment methods are accepted for BCW66HVL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCW66HVL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCW66HVL?

BCW66HVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCW66HVL 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 BCW66HVL?

For technical support, including BCW66HVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCW66HVL requirements.

6.How does Aetrix verify that BCW66HVL is sourced from the original manufacturer or authorized distributors?

All BCW66HVL 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 BCW66HVL meets industry standards.

7.What is the process for return or replacement of BCW66HVL?

All BCW66HVL units undergo pre-shipment inspection (PSI). If there is an issue with BCW66HVL, 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 BCW66HVL part is unused and in its original packaging.

Return procedure for BCW66HVL:

1.Submit a request within 90 days.

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

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