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

Infineon Technologies BC847B-B5003

Name: BC847B-B5003
Brand: Infineon Technologies
SKU: BC847B-B5003
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847B-B5003

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BC847B-B5003.pdf

Description:: TRANS NPN 45V 0.1A PG-SOT23-3-11

Quantity:: RFQ Add To RFQ list

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Inventory:30,000

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Product details

Overview

BC847B-B5003 from Nexperia is an NPN silicon general-purpose bipolar junction transistor (BJT) designed for audio-frequency input stages and driver circuits. It delivers DC current gain (h_FE) of 200–450 at I_C = 2 mA, V_CE = 5 V; V_CEO = 45 V; V_CE(sat) ≤ 200 mV at I_C = 10 mA, I_B = 0.5 mA; and f_T = 250 MHz - enabling reliable low-noise amplification in compact signal conditioning paths.

For engineers reviewing the BC847B-B5003 datasheet, BC847B-B5003 pinout, BC847B-B5003 application, or BC847B-B5003 equivalent, key selection criteria include its AEC-Q101 qualification, SOT23 package thermal performance (R_thJS ≤ 240 K/W), low 1.2 dB noise figure at 1 kHz, and complementary PNP pairing with BC857B.

Technical Context

This discrete NPN BJT operates in linear and switching modes with specified h_FE grouping (B-grade: 200–450), validated under JEDEC-standard thermal conditions (T_S ≤ 71 °C). Its low V_CE(sat) and high f_T support efficient small-signal amplification up to mid-VHF range while maintaining stable gain across I_C = 10 µA to 100 mA.

The device meets automotive reliability requirements per AEC-Q101 and features RoHS-compliant Pb-free construction. Electrical behavior is characterized at T_A = 25 °C with pulse testing (t < 300 µs, D < 2%) for saturation and breakdown parameters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 24 V and 36 V automotive signal chains.
h_FE (I_C = 2 mA)	200–450 - Confirmed DC current gain group B; enables predictable biasing in emitter-follower and common-emitter amplifier stages.
V_CE(sat)	≤ 200 mV @ I_C/I_B = 10 mA/0.5 mA - Low saturation voltage reduces conduction loss in digital interface drivers and level shifters.
f_T	250 MHz - Transition frequency supports stable small-signal amplification up to ~100 MHz with controlled phase margin.
Noise Figure	1.2 dB typ. @ 1 kHz - Verified low-noise performance critical for microphone preamps and sensor front-ends.
R_thJS	≤ 240 K/W - Junction-to-soldering-point thermal resistance enables 330 mW power dissipation at T_S ≤ 71 °C in SOT23 layout.

Pinout & Package

BC847B-B5003 is housed in a standard SOT23 plastic surface-mount package (3-pin, 1.3 mm × 2.9 mm × 1.0 mm), optimized for automated placement and reflow soldering on high-density PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Provides low-impedance return path; connects to ground or negative rail in common-emitter configurations.
2 (Base)	Control input	Accepts bias current to modulate collector current; requires series resistor for stable DC operation.
3 (Collector)	Current source terminal	Delivers amplified output current; connects to load or next-stage input in active-load or switch-mode topologies.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress-test requirements including HTOL, temperature cycling, and ESD.
Low V_CE(sat)	200 mV max ensures minimal voltage drop and heat generation in saturated switching applications.
High h_FE consistency	B-grade binning (200–450) reduces need for external gain compensation in production assemblies.
Low 1/f noise	1.2 dB noise figure at 1 kHz supports precision analog front-ends without added filtering complexity.

Applications

Automotive Door Module

Industrial Sensor Interface

Use Scenario: Signal conditioning for capacitive touch sensors in door handle assemblies.

IC Role / Device Role / Timing Role: NPN BJT configured as emitter follower for impedance buffering and noise rejection.

Use Value: Stable h_FE and low 1.2 dB noise ensure consistent touch sensitivity across -40 °C to +125 °C ambient.

Use Scenario: Amplifying millivolt-level outputs from RTD or thermocouple transducers.

IC Role / Device Role / Timing Role: Discrete transistor in discrete instrumentation amplifier input stage.

Use Value: High DC gain and low V_CE(sat) enable accurate low-voltage amplification without offset drift.

Consumer Audio Preamp

Smart Home Motion Detector

Use Scenario: First-stage amplification in battery-powered microphone circuits.

IC Role / Device Role / Timing Role: Common-emitter amplifier with resistive bias network.

Use Value: 250 MHz f_T and 1.2 dB noise figure preserve wideband audio fidelity with minimal power draw.

Use Scenario: Driving IR LED pulses in PIR-based occupancy sensors.

IC Role / Device Role / Timing Role: Switch-mode current driver for pulsed IR illumination.

Use Value: Fast turn-on/off and ≤200 mV V_CE(sat) maximize LED peak current while minimizing thermal load.

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	SOT323 package; R_thJS ≤ 240 K/W same, but smaller footprint and lower P_tot (250 mW).	Preferred where board space is constrained and thermal margin is sufficient.	Select when footprint reduction outweighs need for full 330 mW dissipation capability.
MMBT3904LT1G	h_FE = 100–300 (lower gain spread); V_CEO = 40 V; not AEC-Q101 qualified.	Used in commercial-grade consumer electronics, not automotive systems.	Choose only for cost-sensitive non-automotive designs requiring basic switching or amplification.

Compared with BC847BW and MMBT3904LT1G, BC847B-B5003 provides higher guaranteed h_FE, AEC-Q101 compliance, and superior thermal derating in SOT23 - making it the preferred choice for automotive and industrial signal-path applications demanding reliability and gain stability.

Availability

BC847B-B5003 is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, consumer audio preamplifiers, and smart home motion detectors requiring stable component supply and long-term manufacturability.

Supply support for BC847B-B5003 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 energy-efficient solutions.

BC847B-B5003 belongs to Nexperia's BC846–BC850 family of general-purpose NPN transistors, engineered for robust AF amplification and driver functions in automotive, industrial, and consumer signal-chain applications.

FAQ

What is the maximum continuous collector current for BC847B-B5003?

The absolute maximum continuous collector current (I_C) is 100 mA at T_S ≤ 71 °C. At higher case temperatures, derating applies per the P_tot vs. T_S curve - e.g., 50 mA at T_S = 100 °C. Peak pulsed current reaches 200 mA for t_p ≤ 10 ms with duty cycle ≤ 2%.

Is BC847B-B5003 suitable for switching applications?

Yes - its V_CE(sat) ≤ 200 mV at I_C/I_B = 10 mA/0.5 mA and fast switching characteristics (f_T = 250 MHz) support reliable digital logic interfacing, LED driving, and relay control. Ensure base drive meets h_FE-based saturation requirements to avoid partial turn-on.

Does BC847B-B5003 have a complementary PNP part?

Yes - BC857B is the direct complementary PNP counterpart, sharing identical SOT23 packaging, AEC-Q101 qualification, and matched electrical specs (V_CEO = 45 V, h_FE = 200–450). They are routinely paired in push-pull output stages and differential amplifiers.

What is the thermal resistance from junction to soldering point?

R_thJS is ≤ 240 K/W for BC847B-B5003 in SOT23 package, measured under JEDEC JESD51-2 conditions. This value enables 330 mW total power dissipation at T_S = 71 °C and informs PCB copper area requirements for thermal management.

BC847B-B5003 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

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

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

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 5mA, 100mA

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

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

Power - Max:: 330 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23-3-11

BC847B-B5003 FAQ

1.How can I place an order for BC847B-B5003 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847B-B5003 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 BC847B-B5003 reliable?

The price and inventory of BC847B-B5003 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847B-B5003 is usually 5 days.

3.What payment methods are accepted for BC847B-B5003?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847B-B5003 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847B-B5003?

BC847B-B5003 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847B-B5003 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 BC847B-B5003?

For technical support, including BC847B-B5003 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847B-B5003 requirements.

6.How does Aetrix verify that BC847B-B5003 is sourced from the original manufacturer or authorized distributors?

All BC847B-B5003 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 BC847B-B5003 meets industry standards.

7.What is the process for return or replacement of BC847B-B5003?

All BC847B-B5003 units undergo pre-shipment inspection (PSI). If there is an issue with BC847B-B5003, 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 BC847B-B5003 part is unused and in its original packaging.

Return procedure for BC847B-B5003:

1.Submit a request within 90 days.

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

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