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

Infineon Technologies BC850BWH6327XTSA1

Name: BC850BWH6327XTSA1
Brand: Infineon Technologies
SKU: BC850BWH6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC850BWH6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC850BWH6327XTSA1.pdf

Description:: TRANS NPN 45V 0.1A PG-SOT323

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC850BWH6327XTSA1 from Infineon Technologies is an NPN silicon bipolar junction transistor designed for audio-frequency input stages and driver circuits. It delivers high DC current gain (h_FE = 200–450 at I_C = 2 mA), low V_CE(sat) (≤250 mV at I_C = 10 mA / I_B = 0.5 mA), and low noise (F = 1.2 dB typical at 1 kHz), making it suitable for low-noise preamplifier and signal buffering applications in automotive and industrial electronics.

For engineers reviewing the BC850BWH6327XTSA1 datasheet, BC850BWH6327XTSA1 pinout, BC850BWH6327XTSA1 application, or BC850BWH6327XTSA1 equivalent, key selection criteria include its AEC-Q101 qualification, SOT-323 (SC-70) package, 45 V V_CEO, 100 mA I_C, and 250 mW P_tot at T_S ≤ 124 °C - all critical for space-constrained, thermally demanding AF amplifier designs.

Technical Context

This transistor operates as a general-purpose NPN amplifying device with complementary PNP counterparts (BC856–BC860 series). Its h_FE grouping (B-grade) ensures consistent current amplification across production lots, while its f_T of 250 MHz supports stable operation well beyond audio bandwidth into low-RF regions.

The device features low C_cb (0.95 pF typical) and C_eb (9 pF typical), enabling minimal Miller effect in common-emitter configurations. Its V_BE(on) of 660–700 mV at I_C = 2 mA and V_CE = 5 V supports predictable biasing in discrete gain stages without thermal runaway risk under nominal conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V automotive supply rails with margin.
I_C	100 mA - Continuous collector current rating; supports medium-drive capability for line drivers and sensor interfaces.
h_FE (I_C = 2 mA)	200–450 - B-grade DC current gain; ensures reliable small-signal amplification with low base drive requirements.
V_CE(sat)	≤250 mV at I_C = 10 mA / I_B = 0.5 mA - Low saturation voltage reduces power loss and heat generation in switching or linear mode.
f_T	250 MHz - Transition frequency confirms usable bandwidth up to ~100 MHz for RF-coupled AF stages and fast-switching applications.
F (Noise Figure)	1.2 dB typical at 1 kHz - Enables low-noise preamplification in microphone inputs and sensor front-ends.
P_tot	250 mW at T_S ≤ 124 °C - Thermal derating curve allows stable operation in compact PCB layouts with limited copper area.

Pinout & Package

BC850BWH6327XTSA1 is housed in a RoHS-compliant SOT-323 (SC-70) plastic surface-mount package, measuring 2.1 mm × 1.25 mm × 0.95 mm, optimized for high-density PCB assembly and automated reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink terminal; connects to ground or low-impedance return path in common-emitter configuration.
2 (Base)	B	Control input; requires ~660–700 mV forward bias to turn on; sensitive to ESD due to thin oxide layer.
3 (Collector)	C	Current source terminal; carries amplified load current; routed to V_CC or active load via decoupling capacitor.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, and HTRB - supports under-hood and infotainment module deployment.
Low noise performance	F = 1.2 dB typical at 1 kHz with 2 kΩ source resistance - preserves SNR in analog front-end signal conditioning.
High h_FE consistency	B-grade binning (200–450) minimizes circuit recalibration during volume production and reduces base resistor tolerance sensitivity.
Low V_CE(sat)	≤250 mV at I_C/I_B = 20 - improves efficiency in Class-A/AB output stages and reduces thermal load on adjacent components.
Pb-free & RoHS compliant	Meets EU Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260 °C) without reliability degradation.

Applications

Automotive Audio Preamp

Industrial Sensor Signal Conditioning

Use Scenario: Amplifying weak analog signals from MEMS microphones or piezoelectric sensors in vehicle cabin noise cancellation systems.

IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter topology with emitter degeneration for linearity and gain stability.

Use Value: 1.2 dB noise figure and 200–450 h_FE ensure high-fidelity signal capture without introducing measurable distortion or thermal drift.

Use Scenario: Buffering and level-shifting 4–20 mA loop transmitter outputs in PLC analog input modules.

IC Role / Device Role / Timing Role: Linear-mode current buffer with fixed bias network to isolate field-side transducers from control-side ADC reference.

Use Value: Low V_CE(sat) (≤250 mV) and 45 V V_CEO enable safe operation across full industrial supply range (±24 V) with minimal headroom loss.

Consumer Audio Line Driver

Automotive Body Control Module Switching

Use Scenario: Driving 600 Ω balanced audio lines from DAC outputs in portable media players and docking stations.

IC Role / Device Role / Timing Role: Class-A emitter follower configured for low-output-impedance buffering and unity-gain voltage transfer.

Use Value: 250 MHz f_T and 9 pF C_eb support flat frequency response up to 20 kHz with <0.1% THD+N at 1 V_PP.

Use Scenario: Controlling LED status indicators and relay coils in door module ECUs with PWM dimming and overcurrent protection.

IC Role / Device Role / Timing Role: Medium-current switch in common-emitter configuration with base resistor network for current limiting and slew control.

Use Value: 100 mA I_C rating and AEC-Q101 qualification guarantee robustness against load dump transients and temperature cycling (-40 °C to +125 °C).

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847BWH6327XTSA1	V_CEO = 45 V, h_FE = 200–450, but P_tot = 250 mW at T_S ≤ 124 °C same; identical SOT-323 package and pinout.	Same AF input/driver use cases; lacks BC850B's extended f_T (250 MHz vs. 300 MHz for BC847B) and slightly higher noise (F = 2.0 dB).	Select when cost optimization is prioritized and 250 MHz bandwidth suffices; no layout change required.
MMBT3904LT1G	V_CEO = 40 V, h_FE = 100–300, P_tot = 310 mW at T_A = 25 °C; SOT-23 package (larger footprint, different pinout).	Higher power dissipation but lower gain consistency and noise performance; not AEC-Q101 qualified.	Choose only for non-automotive, non-thermal-critical applications where board space permits SOT-23 and qualification is not required.

Compared with BC847BWH6327XTSA1 and MMBT3904LT1G, BC850BWH6327XTSA1 offers superior noise performance and tighter h_FE distribution for precision AF amplification, while maintaining AEC-Q101 compliance and thermal robustness in SOT-323 - making it optimal for automotive and industrial signal-path applications where SNR and reliability are non-negotiable.

Availability

BC850BWH6327XTSA1 is available at Aetrix Electronics and suitable for automotive audio preamplifiers, industrial sensor signal conditioners, and consumer line drivers requiring stable component supply, long-term lifecycle support, and AEC-Q101 assurance.

Supply support for BC850BWH6327XTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification infrastructure.

BC850BWH6327XTSA1 belongs to Infineon's BC846–BC850 family of AEC-Q101-qualified NPN transistors, engineered specifically for high-reliability audio-frequency amplification and driver functions in harsh-environment automotive and industrial systems.

FAQ

Is BC850BWH6327XTSA1 pin-compatible with BC847BWH6327XTSA1?

Yes - both devices use the SOT-323 (SC-70) package with identical pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. No PCB layout change is needed when substituting between these parts, though electrical performance differs in noise figure and transition frequency.

What is the maximum operating temperature for BC850BWH6327XTSA1 in continuous operation?

The junction temperature (T_j) must not exceed 150 °C. At ambient temperatures above 85 °C, derating is required: P_tot decreases linearly from 250 mW at T_S = 124 °C to zero at T_S = 150 °C, per the thermal resistance R_thJS ≤ 105 K/W specification.

Does BC850BWH6327XTSA1 support pulse operation beyond its DC ratings?

Yes - the device supports pulsed collector current up to 200 mA (I_CM) for durations ≤10 ms, provided duty cycle D ≤ 2%. Permissible pulse load curves in the datasheet confirm safe operation at 5× DC current for short intervals without thermal runaway or parameter shift.

How does the BC850B grade differ from BC850C in terms of h_FE?

BC850B specifies h_FE = 200–450 at I_C = 2 mA and V_CE = 5 V, while BC850C specifies h_FE = 420–800 under identical conditions. The B-grade provides tighter mid-range gain for predictable biasing in linear amplifiers; C-grade suits high-gain, low-base-current applications like Darlington drivers.

BC850BWH6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

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:: 250 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT323

BC850BWH6327XTSA1 FAQ

1.How can I place an order for BC850BWH6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC850BWH6327XTSA1 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 BC850BWH6327XTSA1 reliable?

The price and inventory of BC850BWH6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC850BWH6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BC850BWH6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC850BWH6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC850BWH6327XTSA1?

BC850BWH6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC850BWH6327XTSA1 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 BC850BWH6327XTSA1?

For technical support, including BC850BWH6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC850BWH6327XTSA1 requirements.

6.How does Aetrix verify that BC850BWH6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BC850BWH6327XTSA1 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 BC850BWH6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BC850BWH6327XTSA1?

All BC850BWH6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC850BWH6327XTSA1, 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 BC850BWH6327XTSA1 part is unused and in its original packaging.

Return procedure for BC850BWH6327XTSA1:

1.Submit a request within 90 days.

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

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