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

Nexperia USA Inc. BC847BW-QX

Name: BC847BW-QX
Brand: Nexperia USA Inc.
SKU: BC847BW-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847BW-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC847BW-QX.pdf

Description:: TRANS NPN 45V 0.1A SOT-323

Quantity:: RFQ Add To RFQ list

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Inventory:4,193

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Product details

Overview

BC847BW-Q from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT323 (SC-70) package, rated for 45 V V_CEO, 100 mA I_C, and DC current gain (h_FE) of 200–450 at V_CE = 5 V, I_C = 2 mA. It serves as a compact, automotive-grade switching and amplification device in space-constrained PCBs for body control modules and sensor interface stages.

For engineers reviewing the BC847BW-Q datasheet, BC847BW-Q pinout, BC847BW-Q application, or BC847BW-Q equivalent, key selection criteria include its 290 typical h_FE, 400 mV max V_CE(sat) at I_C = 100 mA / I_B = 5 mA, AEC-Q101 qualification, SOT323 thermal resistance (625 K/W), and 150 °C maximum junction temperature.

Technical Context

This transistor operates in linear or saturation mode with base-driven control logic, supporting both analog amplification (e.g., low-noise preamplifier stages) and digital switching (e.g., LED driver or relay interface). Its h_FE spread (200–450) enables predictable biasing across production lots under automotive ambient conditions (−40 °C to +125 °C).

Thermal performance is defined for FR4 PCB mounting with single-sided copper and standard footprint, delivering R_th(j-a) = 625 K/W in free air. Saturation voltage remains stable across temperature due to −2 mV/K V_BE drift compensation in design.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; supports 24 V automotive rail switching with margin.
I_C	100 mA - Continuous collector current rating; suitable for driving small solenoids, LEDs, or logic-level interfaces.
h_FE	200–450 - DC current gain range at V_CE = 5 V, I_C = 2 mA; enables stable bias design without external gain-setting resistors.
V_CE(sat)	200–400 mV - Collector-emitter saturation voltage at I_C = 100 mA, I_B = 5 mA; ensures low conduction loss in switching applications.
P_tot	200 mW - Total power dissipation at T_amb ≤ 25 °C on FR4 PCB; defines thermal derating envelope for sustained operation.
T_j(max)	150 °C - Maximum junction temperature; aligns with AEC-Q101 stress test requirements for automotive under-hood use.

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 1.8 mm footprint, 0.4 mm pitch, 0.9 mm height; optimized for high-density routing and reflow soldering per IPC-7351B.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires series resistor to limit I_B and ensure saturation at target I_C.
2	Emitter (E)	Common reference terminal; connected to ground or low-side return path in switch configurations.
3	Collector (C)	Output current sink node; ties to load (e.g., LED anode or relay coil) in low-side switching topologies.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including engine control units and lighting modules per stress test requirements.
Three h_FE gain bins	BC847BW-Q provides mid-range gain (200–450), enabling tighter bias stability than standard BC847W-Q (110–800).
SOT323 thermal performance	R_th(j-a) = 625 K/W on FR4 PCB allows 100 mA operation up to +85 °C ambient without heatsinking.
Low V_CE(sat)	Max 400 mV at full 100 mA load ensures <100 mW conduction loss, reducing thermal stress in sealed enclosures.

Applications

Automotive Body Control Module

Industrial Sensor Signal Conditioning

Use Scenario: Driving 12 V incandescent lamps and small relays in door lock and mirror control circuits.

IC Role / Device Role / Timing Role: Low-side switch controlling load current with TTL/CMOS-compatible base drive.

Use Value: 400 mV max V_CE(sat) minimizes power loss and self-heating during continuous 100 mA lamp operation.

Use Scenario: Amplifying weak mV-level output from thermistors or bridge sensors before ADC sampling.

IC Role / Device Role / Timing Role: Common-emitter amplifier stage with fixed bias network and emitter degeneration.

Use Value: 290 typical h_FE ensures consistent gain across temperature (−40 °C to +125 °C) without trimming.

Consumer Appliance Power Sequencing

Medical Diagnostic Equipment Interface

Use Scenario: Enabling/disabling auxiliary power rails (e.g., display backlight, fan) via microcontroller GPIO.

IC Role / Device Role / Timing Role: Digital switch translating 3.3 V logic to 5–24 V load control with fast turn-on/turn-off.

Use Value: 100 mA rating and 200 ns typical switching time support reliable sequencing in white-goods control boards.

Use Scenario: Isolating patient-connected analog front-end signals from digital processing subsystems.

IC Role / Device Role / Timing Role: Current buffer stage preventing loading of precision op-amp outputs.

Use Value: Low 1.5 pF collector capacitance preserves signal integrity above 10 MHz in ECG/EEG acquisition paths.

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
BC847B-Q	Same h_FE bin (200–450) but non-automotive grade; no AEC-Q101 qualification.	Not approved for automotive safety-critical systems; limited to industrial/commercial use.	Select when cost sensitivity outweighs automotive compliance requirements.
MMBT3904LT1G	Lower h_FE (100–300), higher V_CE(sat) (300 mV typ), same SOT23 package (not SOT323).	Requires larger PCB area and delivers lower gain consistency at low I_C (<1 mA).	Choose only if legacy SOT23 footprint compatibility is mandatory and gain tolerance >±30% is acceptable.

Compared with BC847BW-Q, BC847B-Q lacks automotive qualification but matches gain and saturation performance, while MMBT3904LT1G trades package miniaturization and h_FE stability for broader distributor availability and lower unit cost in non-automotive designs.

Availability

BC847BW-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer appliance power sequencing, and medical diagnostic equipment requiring stable component supply with AEC-Q101 assurance.

Supply support for BC847BW-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.

The BC847xW-Q series targets automotive and industrial applications needing compact, robust, and gain-binned NPN transistors-designed specifically for reliability-critical switching and amplification in harsh environments.

FAQ

What is the maximum operating temperature for BC847BW-Q?

The BC847BW-Q has a maximum junction temperature (T_j) of 150 °C and is rated for ambient temperatures from −65 °C to +150 °C. Its thermal resistance (R_th(j-a)) is 625 K/W on standard FR4 PCB, allowing safe operation at 100 mA up to +85 °C ambient with no heatsink.

Is BC847BW-Q pin-compatible with BC847B-Q?

Yes-both share identical SOT323 (SC-70) package and pinout (1 = Base, 2 = Emitter, 3 = Collector). The sole functional difference is AEC-Q101 qualification: BC847BW-Q is automotive-qualified, while BC847B-Q is not, though electrical parameters match within the same h_FE bin.

What is the typical noise figure of BC847BW-Q?

The BC847BW-Q has a typical noise figure (NF) of 2 dB at I_C = 200 μA, V_CE = 5 V, R_S = 2 kΩ, f = 1 kHz, and bandwidth = 200 Hz-making it suitable for low-noise preamplifier stages in sensor signal chains where sub-5 dB NF is required.

Can BC847BW-Q replace BC847CW-Q in a circuit?

No-BC847BW-Q (h_FE = 200–450) and BC847CW-Q (h_FE = 420–800) belong to different gain bins. Substituting BW-Q for CW-Q may cause insufficient base drive or unstable bias in high-gain amplifier designs, especially at low I_C (<1 mA); verify h_FE dependency in the specific operating point.

BC847BW-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BC847xW-Q

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 100 mA

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

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 5mA, 100mA

Current - Collector Cutoff (Max):: 15nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 2mA, 5V

Power - Max:: 200 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

BC847BW-QX FAQ

1.How can I place an order for BC847BW-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847BW-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 BC847BW-QX reliable?

The price and inventory of BC847BW-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847BW-QX is usually 5 days.

3.What payment methods are accepted for BC847BW-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847BW-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847BW-QX?

BC847BW-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847BW-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 BC847BW-QX?

For technical support, including BC847BW-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847BW-QX requirements.

6.How does Aetrix verify that BC847BW-QX is sourced from the original manufacturer or authorized distributors?

All BC847BW-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 BC847BW-QX meets industry standards.

7.What is the process for return or replacement of BC847BW-QX?

All BC847BW-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC847BW-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 BC847BW-QX part is unused and in its original packaging.

Return procedure for BC847BW-QX:

1.Submit a request within 90 days.

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

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