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

Nexperia USA Inc. BC847CW-QX

Name: BC847CW-QX
Brand: Nexperia USA Inc.
SKU: BC847CW-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847CW-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC847CW-QX.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC847CW-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 420–800 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 signal-level control and load interface circuits.

For engineers reviewing the BC847CW-Q datasheet, BC847CW-Q pinout, BC847CW-Q application, or BC847CW-Q equivalent, this page delivers verified electrical parameters, validated SOT323 terminal mapping, real-world automotive and industrial use cases, and cross-referenced alternatives with documented gain and saturation voltage differences.

Technical Context

This transistor operates as a discrete bipolar junction device with fixed NPN polarity, optimized for linear amplification and saturated switching in low-power analog and digital interface stages. Its h_FE binning (C-grade: 420–800) ensures predictable base drive requirements across temperature (−55 °C to +150 °C).

Thermal performance is defined for FR4 PCB mounting (single-sided copper, tin-plated), with R_th(j-a) = 625 K/W and P_tot = 200 mW at T_amb ≤ 25 °C. Absolute maximum ratings include V_CBO = 50 V, V_EBO = 6 V, and peak pulse currents up to 200 mA (t_p ≤ 1 ms).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe operating voltage headroom in 24 V automotive and 3.3/5 V logic interface circuits.
I_C	100 mA - Continuous DC collector current rating; supports driving small relays, LEDs, or logic-level MOSFET gates without external heat sinking.
h_FE	420–800 @ V_CE = 5 V, I_C = 2 mA - High and tightly binned DC current gain enables low-base-current switching and stable biasing in amplifier configurations.
V_CE(sat)	200–400 mV @ I_C = 100 mA, I_B = 5 mA - Low saturation voltage minimizes power loss and heating during on-state operation in switching applications.
P_tot	200 mW @ T_amb ≤ 25 °C - Total power dissipation limit on standard FR4 PCB; constrains usable I_C×V_CE product in continuous operation.
T_j	150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures without derating below ambient.

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 3-terminal, ultra-small footprint (2.2 mm × 1.35 mm × 0.95 mm), optimized for high-density routing and reflow soldering on FR4 PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input node; requires current-limited drive (e.g., via series resistor) to achieve target I_C based on h_FE bin.
2	Emitter (E)	Reference terminal for bias network; connected to ground or low-side return path in common-emitter configuration.
3	Collector (C)	Output node carrying load current; placed on top-side trace for thermal relief and minimal parasitic inductance in switching paths.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces per stress test requirements.
Three h_FE gain bins (W/A/B/C)	BC847CW-Q provides highest gain range (420–800), enabling consistent low-I_B drive across production lots and temperature extremes.
SOT323 (SC-70) package	0.65 mm pitch, 2.2 mm × 1.35 mm footprint - reduces board area by >40% vs. SOT23 while maintaining compatibility with standard pick-and-place and reflow processes.
Low V_CE(sat) and V_BE(sat)	200–400 mV and 900 mV max respectively at full rated current - improves efficiency and reduces self-heating in battery-powered and thermally constrained systems.

Applications

Automotive Door Module Switching

Industrial Sensor Signal Amplification

Use Scenario: Driving window lift motor enable lines and mirror position feedback switches in door control units.

IC Role / Device Role / Timing Role: Discrete NPN switch controlling 12 V loads with <10 µs turn-on/off response and AEC-Q101 reliability.

Use Value: High h_FE ensures reliable activation using microcontroller GPIO pins without additional driver stages, reducing BOM count and layout complexity.

Use Scenario: Amplifying low-level analog outputs (e.g., 0–100 mV) from pressure or temperature sensors before ADC sampling.

IC Role / Device Role / Timing Role: Common-emitter DC amplifier stage with fixed bias, delivering linear gain and low noise (NF = 2–10 dB @ 1 kHz).

Use Value: Tight h_FE binning and stable V_BE (660 mV typ. @ I_C = 10 mA) enable accurate, repeatable gain calibration across production units.

USB-C Power Delivery Interface

Smart Home Motion Detector Output Stage

Use Scenario: Level-shifting and enabling/disabling 5 V USB-C V_CONN or CC line pull-up resistors based on controller commands.

IC Role / Device Role / Timing Role: Low-power, fast-switching NPN buffer isolating MCU I/O from higher-voltage bus domains.

Use Value: 45 V V_CEO provides margin against transient spikes on USB-C lines; SOT323 footprint fits tight spacing near connector zones.

Use Scenario: Driving piezoelectric buzzer or LED indicator in PIR-based occupancy sensors powered by coin cells or energy harvesters.

IC Role / Device Role / Timing Role: Low-quiescent-current switch activated by comparator output, operating intermittently with <1 µA leakage (I_CBO ≤ 15 nA).

Use Value: Ultra-low standby current and 100 mA I_C capability support multi-year battery life while reliably pulsing audible/visual alerts.

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
BC847CMTF	Same h_FE range (420–800) but in SOT-523 package; 0.5 mm pitch, smaller footprint (1.6 mm × 0.8 mm).	Higher density routing possible, but lower power handling (P_tot = 150 mW) and no AEC-Q101 qualification.	Select when board space is critical and automotive qualification is not required.
MMBT3904-7-F	Lower h_FE (100–300), higher V_CE(sat) (300 mV min), same SOT-23 package; AEC-Q101 qualified.	Less suitable for low-base-drive designs; better for cost-sensitive non-precision switching where gain tolerance is relaxed.	Select when standardized SOT-23 footprint is mandatory and gain consistency is secondary to supply chain availability.

Compared with BC847CMTF and MMBT3904-7-F, BC847CW-Q uniquely balances AEC-Q101 compliance, high h_FE binning, and SOT323 thermal/power capability-making it optimal for automotive and industrial designs requiring both reliability and design margin in compact layouts.

Availability

BC847CW-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C peripheral control, and smart home motion detection systems requiring stable component supply and long-term lifecycle assurance.

Supply support for BC847CW-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 belongs to Nexperia's AEC-Q101-qualified general-purpose transistor portfolio, engineered specifically for robust, space-efficient switching and amplification in automotive ECUs and industrial control modules.

FAQ

Is BC847CW-Q pin-compatible with BC847BW-Q or BC847AW-Q?

Yes - all BC847xW-Q variants share identical SOT323 package, pin 1 (base), pin 2 (emitter), pin 3 (collector) assignment, and mechanical footprint. Only DC current gain (h_FE) differs: BC847CW-Q (420–800), BC847BW-Q (200–450), BC847AW-Q (110–220). No layout change is needed when upgrading gain grade.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 100 mA (single pulse, t_p ≤ 1 ms), but for continuous DC operation, I_B must be limited to ensure I_C ≤ 100 mA and P_tot ≤ 200 mW. At h_FE = 420, I_B ≤ 238 µA maintains I_C = 100 mA; practical designs use 1–10 mA with appropriate series resistance to avoid thermal runaway.

Does BC847CW-Q support wave soldering?

Yes - Nexperia provides dedicated wave soldering footprint (Fig. 16) with 3.65 mm × 2.1 mm solder land dimensions and preferred transport direction. The SOT323 package is qualified for both reflow and wave processes, provided solder profile adheres to JEDEC J-STD-020 and J-STD-006 standards for lead-free assembly.

How does thermal resistance change with PCB copper area?

R_th(j-a) = 625 K/W is specified for FR4 with single-sided 1 oz copper and standard footprint. Doubling copper area (e.g., 2-layer board with thermal vias to inner ground plane) can reduce R_th(j-a) by ~30–40%, improving P_tot margin. Data sheet Fig. 1 shows Z_th(j-a) curves confirming improved transient thermal response with enhanced copper spread.

BC847CW-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:: 420 @ 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

BC847CW-QX FAQ

1.How can I place an order for BC847CW-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847CW-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 BC847CW-QX reliable?

The price and inventory of BC847CW-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847CW-QX is usually 5 days.

3.What payment methods are accepted for BC847CW-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847CW-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847CW-QX?

BC847CW-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847CW-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 BC847CW-QX?

For technical support, including BC847CW-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847CW-QX requirements.

6.How does Aetrix verify that BC847CW-QX is sourced from the original manufacturer or authorized distributors?

All BC847CW-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 BC847CW-QX meets industry standards.

7.What is the process for return or replacement of BC847CW-QX?

All BC847CW-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC847CW-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 BC847CW-QX part is unused and in its original packaging.

Return procedure for BC847CW-QX:

1.Submit a request within 90 days.

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

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