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

Nexperia USA Inc. BC847C-QR

Name: BC847C-QR
Brand: Nexperia USA Inc.
SKU: BC847C-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847C-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BC847C-QR.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:74,460

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Product details

Overview

BC847C-QR 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) of 420–800 at V_CE = 5 V / I_C = 2 mA. It serves as a low-power switching and amplification device in automotive signal conditioning, LED driver biasing, and sensor interface stages.

For engineers reviewing the BC847C-QR datasheet, BC847C-QR pinout, BC847C-QR application, or BC847C-QR equivalent, this page delivers verified electrical parameters, thermal behavior under FR4 PCB mounting, automotive qualification status, and real-world use context for reliable component selection in production-grade embedded systems.

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 tightly binned to 420–800.

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

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; sets upper rail limit for switch/amp stage operation.
I_C	100 mA - Continuous collector current rating; defines max load drive capability in DC or pulsed switching.
h_FE	420–800 @ V_CE=5 V, I_C=2 mA - High, tightly binned DC current gain enables stable biasing with minimal base drive variation.
V_CEsat	≤400 mV @ I_C=100 mA, I_B=5 mA - Low saturation voltage minimizes power loss and heating in on-state switching applications.
P_tot	250 mW @ T_amb ≤ 25 °C - Total power dissipation limit on standard FR4 PCB; constrains thermal design margin.
f_T	100 MHz @ V_CE=5 V, I_C=10 mA - Transition frequency confirms usable bandwidth up to low RF frequencies for small-signal amplification.
R_th(j-a)	500 K/W - Junction-to-ambient thermal resistance on standard FR4; determines temperature rise per watt of dissipated power.

Pinout & Package

SOT23 (TO-236AB) surface-mount plastic 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-020/001.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires ~700 mV forward bias and sufficient I_B to achieve target I_C based on h_FE.
2	Emitter (E)	Common reference terminal for NPN configuration; connected to ground or low-side return path in most switching topologies.
3	Collector (C)	Output current terminal; carries amplified I_C and must be routed with adequate trace width for 100 mA continuous current.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces.
High h_FE bin (420–800)	Reduces required base drive current and improves stability across temperature (−55 °C to +150 °C).
Low V_CEsat (≤400 mV)	Enables efficient low-voltage switching in 3.3 V and 5 V logic-level circuits without excessive conduction loss.
FR4-optimized thermal design	Specified R_th(j-a) = 500 K/W ensures predictable junction temperature rise on standard PCB layouts.
Small SOT23 footprint	Supports high-density routing in space-constrained automotive ECUs and portable industrial controllers.

Applications

Automotive Door Module Switching

Industrial Sensor Signal Amplification

Use Scenario: Driving window lift motor relays and door lock solenoids via microcontroller GPIO pins.

IC Role / Device Role / Timing Role: NPN switch providing current gain to translate 5 mA MCU output into 100 mA load current.

Use Value: Low V_CEsat (<400 mV) limits relay coil heating; AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime.

Use Scenario: Amplifying weak analog outputs from thermistors and pressure sensors before ADC sampling.

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

Use Value: Tight h_FE bin (420–800) reduces calibration drift; f_T = 100 MHz supports bandwidth up to 10 kHz for sensor signals.

LED Indicator Biasing

Power Supply Enable Control

Use Scenario: Controlling status LEDs in dashboard displays and HVAC panels using 3.3 V MCU outputs.

IC Role / Device Role / Timing Role: Low-side switch sinking LED current through collector-emitter path.

Use Value: V_CEO = 45 V accommodates transient spikes in 12 V automotive systems; SOT23 footprint fits tight panel layouts.

Use Scenario: Enabling/disabling auxiliary LDOs or DC-DC converters in multi-rail power management subsystems.

IC Role / Device Role / Timing Role: High-gain switch controlling enable pin of downstream regulator via open-collector logic.

Use Value: High h_FE ensures full turn-on with <1 mA base current; V_EBO = 6 V prevents damage during enable line transients.

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
BC847BW-Q	Same h_FE range (420–800), but in SOT323 package (smaller footprint, higher R_th(j-a) = 625 K/W).	Preferred where board area is critical and thermal load is <100 mW; unsuitable for sustained 100 mA operation.	Select when miniaturization outweighs thermal margin; verify layout cooling for same I_C.
MMBT4401-7-F	Higher V_CEO = 40 V (vs. 45 V), h_FE = 100–300 (wider spread), not AEC-Q101 qualified.	Acceptable for non-automotive consumer or industrial use; lacks automotive stress test validation.	Choose only for cost-sensitive non-automotive designs; avoid where AEC compliance is mandatory.

Compared with BC847C-QR, BC847BW-Q trades thermal robustness for size reduction, while MMBT4401-7-F sacrifices automotive qualification and h_FE consistency-making BC847C-QR the optimal choice for production automotive and high-reliability industrial switching.

Availability

BC847C-QR is available at Aetrix Electronics and suitable for automotive ECU manufacturing, industrial sensor interface modules, and LED lighting control systems requiring stable component supply across extended product lifecycles.

Supply support for BC847C-QR 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.

The BC847x-Q series targets automotive-grade general-purpose switching and amplification, designed to meet stringent AEC-Q101 requirements while maintaining compatibility with legacy BC847 footprints and bias networks.

FAQ

Is BC847C-QR pin-compatible with standard BC847C?

Yes - BC847C-QR uses the identical SOT23 (TO-236AB) package and pinout (1=B, 2=E, 3=C) as non-automotive BC847C variants. The '-QR' suffix denotes Nexperia's automotive-qualified version with AEC-Q101 testing and enhanced traceability, but mechanical and electrical pin functions remain fully interchangeable.

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 ≤ 250 mW. At h_FE = 420, 100 mA I_C requires only ~240 µA I_B; typical designs use 1–5 mA I_B for safety margin and fast switching.

Can BC847C-QR replace BC847B-Q in existing designs?

Yes, with design verification - BC847C-QR offers higher minimum h_FE (420 vs. 200), enabling reduced base drive and improved bias stability. However, higher gain may affect switching speed and saturation characteristics; confirm V_CEsat and turn-off time meet timing requirements in the target circuit.

Does BC847C-QR require derating above 25 °C ambient?

Yes - P_tot must be linearly derated above 25 °C at 2.0 mW/°C (based on R_th(j-a) = 500 K/W). At 85 °C ambient, maximum allowed power drops to 130 mW. Designers must calculate actual junction temperature using T_j = T_amb + (P_diss × R_th(j-a)) and ensure T_j ≤ 150 °C under worst-case load and ambient conditions.

BC847C-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:: 420 @ 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

BC847C-QR FAQ

1.How can I place an order for BC847C-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847C-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 BC847C-QR reliable?

The price and inventory of BC847C-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847C-QR is usually 5 days.

3.What payment methods are accepted for BC847C-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847C-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847C-QR?

BC847C-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847C-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 BC847C-QR?

For technical support, including BC847C-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847C-QR requirements.

6.How does Aetrix verify that BC847C-QR is sourced from the original manufacturer or authorized distributors?

All BC847C-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 BC847C-QR meets industry standards.

7.What is the process for return or replacement of BC847C-QR?

All BC847C-QR units undergo pre-shipment inspection (PSI). If there is an issue with BC847C-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 BC847C-QR part is unused and in its original packaging.

Return procedure for BC847C-QR:

1.Submit a request within 90 days.

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

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