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

Nexperia USA Inc. BC847-QR

Name: BC847-QR
Brand: Nexperia USA Inc.
SKU: BC847-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BC847-QR.pdf

Description:: TRANS NPN 45V 0.1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:6,873

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Product details

Overview

BC847-Q from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT23 (TO-236AB) package, rated for 45 V V_CEO, 100 mA I_C, and DC current gain (h_FE) spanning 110–800 at V_CE = 5 V and I_C = 2 mA. It serves as a low-power switching and amplification device in automotive body control modules, LED drivers, and sensor interface circuits.

For engineers reviewing the BC847-Q datasheet, BC847-Q pinout, BC847-Q application, or BC847-Q equivalent, this page delivers verified electrical parameters, thermal behavior under FR4 PCB mounting, AEC-Q101 qualification status, and validated automotive-grade alternatives with documented gain and saturation voltage differences.

Technical Context

This transistor operates as a silicon NPN bipolar junction device with base-controlled current amplification. Its design supports linear amplification (V_CE ≥ 1 V) and saturated switching (V_CEsat ≤ 400 mV at I_C = 100 mA, I_B = 5 mA), with guaranteed h_FE spread across BC847A-Q/B/C-Q variants.

Thermal performance is defined for FR4 PCB mounting: R_th(j-a) = 500 K/W in free air, T_j max = 150 °C, and P_tot = 250 mW at T_amb ≤ 25 °C. Absolute maximum ratings include V_CBO = 50 V, V_EBO = 6 V, and I_CM = 200 mA (1 ms pulse).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 12 V/24 V automotive supply rails.
I_C	100 mA continuous - Supports load switching up to ~1 W at 12 V with adequate heatsinking on standard FR4.
h_FE	110–800 - Gain spread enables selection of BC847A-Q (110–220), BC847B-Q (200–450), or BC847C-Q (420–800) for bias stability or low-drive applications.
V_CEsat	200–400 mV at I_C = 100 mA, I_B = 5 mA - Ensures <100 mW power loss in saturated switch mode, minimizing self-heating.
f_T	100 MHz - Supports small-signal amplification up to FM band frequencies; sufficient for audio preamp and signal conditioning stages.
R_th(j-a)	500 K/W - Thermal resistance measured on single-sided FR4 PCB; requires layout-aware copper area for >100 mA sustained operation.

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package: 3-pin, 1.3 mm × 2.9 mm footprint, 1.1 mm height, tin-plated leads compatible with reflow and wave soldering per IPC-J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires 0.5–5 mA drive to saturate 100 mA collector current.
2	Emitter (E)	Reference terminal for bias network; connected to ground or low-side return path in common-emitter configuration.
3	Collector (C)	Output current terminal; handles switched load current up to 100 mA with V_CE ≤ 45 V.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive underhood and cabin applications including temperature cycling, humidity testing, and ESD robustness per JESD22-A114.
Three h_FE grades	BC847A-Q (110–220), BC847B-Q (200–450), BC847C-Q (420–800) - Enables precise bias design without external gain-setting resistors.
Low V_CEsat	200 mV typical at I_C/I_B = 20 - Reduces conduction loss in high-duty-cycle switching, improving efficiency in LED dimming circuits.
FR4-optimized thermal rating	P_tot = 250 mW at T_amb = 25 °C on standard PCB - Allows direct replacement of legacy TO-92 transistors without thermal derating penalties.

Applications

Automotive Door Module Switching

Industrial Sensor Signal Amplification

Use Scenario: Driving window lift motor relays and interior light loads in 12 V vehicle architectures.

IC Role / Device Role / Timing Role: Low-side NPN switch controlling 50–100 mA solenoid and LED indicator currents.

Use Value: V_CEsat ≤ 400 mV ensures <40 mW dissipation per switch, enabling integration into space-constrained door control ECUs.

Use Scenario: Amplifying weak analog outputs from thermistors and pressure sensors in PLC I/O modules.

IC Role / Device Role / Timing Role: Common-emitter DC amplifier with fixed-gain bias network for 0.1–10 mV input signals.

Use Value: h_FE ≥ 420 (BC847C-Q) provides stable 20–50× voltage gain with minimal component count and no trimming required.

Consumer LED Backlight Control

Medical Portable Device Power Sequencing

Use Scenario: PWM-driven current regulation for white LED strings in smart displays and lighting panels.

IC Role / Device Role / Timing Role: Fast-switching NPN transistor operating in saturation/cutoff at 1–10 kHz PWM frequency.

Use Value: f_T = 100 MHz and t_f/t_r < 100 ns ensure clean edge transitions, reducing audible noise and EMI in compact enclosures.

Use Scenario: Enabling/disabling auxiliary power rails during boot-up and sleep modes in battery-powered diagnostic tools.

IC Role / Device Role / Timing Role: Controlled turn-on switch with base resistor network defining precise enable timing and inrush limiting.

Use Value: AEC-Q101 qualification guarantees reliability over 10+ year field life, meeting IEC 60601-1 safety-critical subsystem requirements.

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	h_FE = 200–450 (vs. 110–800 for BC847-Q); tighter gain distribution improves bias predictability.	Preferred where consistent current gain is critical, e.g., precision current mirrors or feedback loops.	Select BC847B-Q when circuit stability outweighs need for widest h_FE tolerance.
MMBT3904-Q	V_CEO = 40 V (vs. 45 V); h_FE = 100–300; same SOT23 package and AEC-Q101 qualification.	Lower voltage margin suits 5 V/3.3 V logic-level interfaces but limits use in 24 V systems.	Choose MMBT3904-Q only if system rail is ≤20 V and gain consistency >200 is sufficient.

Compared with BC847-Q, BC847B-Q offers narrower h_FE spread for predictable biasing, while MMBT3904-Q trades 5 V lower V_CEO for broader industry familiarity-neither is pin-compatible without verifying base drive and saturation margins.

Availability

BC847-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer LED drivers, and medical portable device power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BC847-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 BC847x-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for robust operation in automotive body electronics and industrial control environments where thermal stability and parametric consistency are essential.

FAQ

Is BC847-Q suitable for 24 V automotive systems?

Yes. With V_CEO = 45 V and V_CBO = 50 V, BC847-Q supports transient overvoltages common in 24 V truck and commercial vehicle systems. Its AEC-Q101 qualification covers temperature cycling from −40 °C to +150 °C and load-dump immunity per ISO 7637-2, making it appropriate for under-hood and chassis-mounted modules.

What is the difference between BC847-Q and BC847C-Q?

BC847-Q is the base part number representing the full gain-range variant (h_FE = 110–800). BC847C-Q is a specific grade within that series with guaranteed h_FE = 420–800 at V_CE = 5 V and I_C = 2 mA. The "C" suffix denotes highest-gain binning; both share identical package, voltage/current ratings, and AEC-Q101 qualification.

Can BC847-Q replace BC847 in non-automotive designs?

Yes, with caveats. BC847-Q offers identical electrical specs to standard BC847 but adds AEC-Q101 qualification, tighter process controls, and enhanced traceability. It is fully backward-compatible in form, fit, and function-but its higher reliability assurance comes at a slight cost premium, justified only where automotive or extended-lifecycle requirements apply.

What PCB layout considerations apply for thermal performance?

For rated P_tot = 250 mW, use minimum 10 mm² copper pour connected to emitter pad (Pin 2) on top layer, with 2–4 thermal vias to inner ground plane. Avoid routing high-current traces near the SOT23 body. The 500 K/W R_th(j-a) assumes single-sided FR4 with tin-plated standard footprint-doubling copper area reduces thermal resistance by ~15%.

BC847-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BC847x-Q

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

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:: 110 @ 2mA, 5V

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

BC847-QR FAQ

1.How can I place an order for BC847-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847-QR 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 BC847-QR reliable?

The price and inventory of BC847-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847-QR is usually 5 days.

3.What payment methods are accepted for BC847-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847-QR?

BC847-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847-QR 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 BC847-QR?

For technical support, including BC847-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847-QR requirements.

6.How does Aetrix verify that BC847-QR is sourced from the original manufacturer or authorized distributors?

All BC847-QR 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 BC847-QR meets industry standards.

7.What is the process for return or replacement of BC847-QR?

All BC847-QR units undergo pre-shipment inspection (PSI). If there is an issue with BC847-QR, 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 BC847-QR part is unused and in its original packaging.

Return procedure for BC847-QR:

1.Submit a request within 90 days.

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

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