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

Infineon Technologies BC858CWE6327BTSA1

Name: BC858CWE6327BTSA1
Brand: Infineon Technologies
SKU: BC858CWE6327BTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC858CWE6327BTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC858CWE6327BTSA1.pdf

Description:: TRANS PNP 30V 0.1A PG-SOT323

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC858CWE6327BTSA1 from Infineon Technologies is a PNP silicon small-signal transistor designed for audio-frequency input stages and driver circuits. It delivers high DC current gain (h_FE = 420–520 at I_C = 2 mA), low V_CE(sat) (≤300 mV at I_C = 10 mA/I_B = 0.5 mA), and low noise (F = 1–4 dB at 1 kHz), making it suitable for low-distortion preamplifier and switching applications in automotive and industrial control modules.

For engineers reviewing the BC858CWE6327BTSA1 datasheet, BC858CWE6327BTSA1 pinout, BC858CWE6327BTSA1 application, or BC858CWE6327BTSA1 equivalent, key selection criteria include verified h_FE group C performance, SOT-323 package thermal resistance (R_thJS ≤ 90 K/W), AEC-Q101 qualification, and complementary NPN pairing with BC848C.

Technical Context

This PNP transistor operates in linear amplification and saturated switching modes, with guaranteed h_FE grouping (C: 420–520 at I_C = 10 µA/V_CE = 5 V) and stable gain across I_C = 0.2–100 mA. Its f_T of 250 MHz supports wideband AF signal handling up to 15 kHz with minimal phase shift.

The device features low V_BE(sat) (≤850 mV at I_C = 100 mA/I_B = 0.5 mA) and tight V_CE(sat) distribution (75–300 mV), enabling efficient current sourcing in bias networks and level-shifting interfaces where base drive efficiency and thermal stability are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 24 V automotive supply rails.
h_FE (I_C = 2 mA)	420–520 - High, tightly binned DC current gain ensures predictable base current sizing in amplifier biasing.
V_CE(sat)	≤300 mV - Low saturation voltage minimizes power loss and self-heating in switching applications.
f_T	250 MHz - Sufficient bandwidth for audio-frequency amplification with flat response up to 15 kHz.
Noise figure	1–4 dB - Verified low-noise performance at 1 kHz/0.2 mA, critical for microphone preamp front-ends.
R_thJS	≤90 K/W - Thermal resistance enables reliable operation at T_J ≤ 150 °C with moderate PCB copper area.

Pinout & Package

BC858CWE6327BTSA1 is housed in a RoHS-compliant SOT-323 (SC-70) plastic surface-mount package, measuring 2.1 mm × 2.0 mm × 0.95 mm, optimized for high-density PCB layouts and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink terminal; connected to ground or lower-potential node in common-emitter configurations.
2 (Base)	B	Control input; requires ~0.7 V forward bias and precise current limiting for stable h_FE-dependent operation.
3 (Collector)	C	Current source output; supplies load current when base is driven, with V_CE clamped near 0.3 V in saturation.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, and HAST.
Low V_CE(sat) at high I_C	650 mV max at I_C = 100 mA/I_B = 5 mA - enables efficient high-current switching without external heat sinking.
Group C h_FE binning	Guaranteed 420–520 at I_C = 10 µA - reduces circuit gain variation and simplifies production calibration.
Low-noise AF performance	F = 1–4 dB at 1 kHz/0.2 mA - meets SNR requirements in analog sensor interface and audio signal conditioning paths.

Applications

Automotive Door Module Preamp

Industrial PLC Input Buffer

Use Scenario: Amplifying low-level analog signals from door latch position sensors before ADC sampling.

IC Role / Device Role / Timing Role: PNP common-emitter preamplifier providing 20–30 dB voltage gain with DC-coupled bias.

Use Value: Group C h_FE ensures consistent gain across temperature (−40 °C to +125 °C), reducing calibration overhead.

Use Scenario: Level-shifting and isolating 24 V digital inputs to 3.3 V microcontroller GPIOs.

IC Role / Device Role / Timing Role: Saturated PNP switch acting as active-low open-collector interface with fast turn-off (<100 ns).

Use Value: V_CE(sat) ≤300 mV limits power dissipation to <3 mW at 10 mA, eliminating need for series resistors.

USB-C Power Delivery Monitor

Medical Patient Monitor Front-End

Use Scenario: Biasing current mirrors in real-time VBUS current sensing circuits.

IC Role / Device Role / Timing Role: Precision current source element in matched transistor pairs for ratiometric measurement.

Use Value: Tight h_FE matching (±10%) within same reel enables <0.5% current error without trimming.

Use Scenario: Low-noise amplification of ECG electrode signals prior to instrumentation amplifier stage.

IC Role / Device Role / Timing Role: First-stage discrete PNP amplifier with emitter degeneration for gain stability.

Use Value: 1 dB typical noise figure at 1 kHz preserves signal integrity in sub-µV biopotential acquisition.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC858CTA	Same die, SOT-23 package; R_thJS = 240 K/W vs. 90 K/W in SOT-323	Lower power density handling; unsuitable for >50 mW continuous dissipation	Select when board space allows larger footprint and thermal budget permits higher junction rise.
MMBT858	Non-AEC-Q101; h_FE min = 300 (no group C guarantee); f_T = 150 MHz	Not qualified for automotive use; limited bandwidth for wideband AF design	Acceptable for cost-sensitive consumer-grade audio buffers where qualification and noise are secondary.

Compared with BC858CTA and MMBT858, BC858CWE6327BTSA1 uniquely combines AEC-Q101 compliance, SOT-323 thermal efficiency, and guaranteed Group C h_FE, making it optimal for space-constrained, high-reliability automotive and industrial signal conditioning.

Availability

BC858CWE6327BTSA1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, and medical patient monitoring equipment requiring stable component supply and long-term lifecycle support.

Supply support for BC858CWE6327BTSA1 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 ICs, and discrete devices, with global manufacturing and quality certification aligned to ISO/TS 16949.

The BC856–BC860 family was engineered specifically for high-reliability analog signal conditioning in automotive and industrial environments, emphasizing low-noise operation, AEC-Q101 robustness, and tight parametric binning.

FAQ

Is BC858CWE6327BTSA1 pin-compatible with BC848C?

No - BC858CWE6327BTSA1 is a PNP transistor with E-B-C pinout (1=E, 2=B, 3=C) in SOT-323, while BC848C is an NPN with C-B-E pinout (1=C, 2=B, 3=E). Physical mounting is identical, but polarity and pin function are inverted; direct substitution requires circuit redesign.

What is the maximum continuous collector current at 125°C ambient?

At T_A = 125 °C, derated power dissipation limits I_C to approximately 45 mA (based on P_tot = 250 mW and V_CE(sat) ≈ 0.3 V), assuming no additional heatsinking and standard FR-4 PCB layout with 1 cm² copper pour.

Does this part support pulsed operation beyond its DC ratings?

Yes - pulse operation up to 200 mA is permitted with duty cycle ≤5% and pulse width ≤100 µs, as confirmed by the permissible pulse load curve (EHP00377) showing P_tot(max)/P_tot(DC) = 3.5 at t_p = 100 µs.

Can BC858CWE6327BTSA1 be used in Class-A audio amplifier stages?

Yes - its low noise (1–4 dB), high h_FE, and stable V_BE(ON) (650–820 mV) enable clean Class-A biasing at I_C = 1–5 mA; however, thermal design must account for R_thJS = 90 K/W to maintain T_J < 125 °C under continuous load.

BC858CWE6327BTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 650mV @ 5mA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 420 @ 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

BC858CWE6327BTSA1 FAQ

1.How can I place an order for BC858CWE6327BTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC858CWE6327BTSA1 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 BC858CWE6327BTSA1 reliable?

The price and inventory of BC858CWE6327BTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC858CWE6327BTSA1 is usually 5 days.

3.What payment methods are accepted for BC858CWE6327BTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC858CWE6327BTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC858CWE6327BTSA1?

BC858CWE6327BTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC858CWE6327BTSA1 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 BC858CWE6327BTSA1?

For technical support, including BC858CWE6327BTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC858CWE6327BTSA1 requirements.

6.How does Aetrix verify that BC858CWE6327BTSA1 is sourced from the original manufacturer or authorized distributors?

All BC858CWE6327BTSA1 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 BC858CWE6327BTSA1 meets industry standards.

7.What is the process for return or replacement of BC858CWE6327BTSA1?

All BC858CWE6327BTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC858CWE6327BTSA1, 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 BC858CWE6327BTSA1 part is unused and in its original packaging.

Return procedure for BC858CWE6327BTSA1:

1.Submit a request within 90 days.

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

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