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

Infineon Technologies BC858CWH6327XTSA1

Name: BC858CWH6327XTSA1
Brand: Infineon Technologies
SKU: BC858CWH6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC858CWH6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC858CWH6327XTSA1.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:8,804

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Product details

Overview

BC858CWH6327XTSA1 from Infineon Technologies is a PNP silicon small-signal transistor designed for audio-frequency input stages and driver circuits. It delivers h_FE = 420–520 at I_C = 2 mA, V_CE = 5 V; V_CEO = 30 V; V_CE(sat) = 300 mV max at I_C = 10 mA, I_B = 0.5 mA; and f_T = 250 MHz - enabling high-gain, low-saturation switching in compact analog signal paths.

For engineers reviewing the BC858CWH6327XTSA1 datasheet, BC858CWH6327XTSA1 pinout, BC858CWH6327XTSA1 application, or BC858CWH6327XTSA1 equivalent, key selection criteria include guaranteed h_FE group C performance, AEC-Q101 qualification for automotive environments, SOT323 package thermal resistance (R_thJS ≤ 105 K/W), and low-noise operation below 15 kHz.

Technical Context

This PNP transistor operates with emitter-base forward bias and collector-base reverse bias in common-emitter amplifier or switch configurations. Its h_FE group C guarantees minimum DC current gain of 420 at I_C = 10 µA and 480 at I_C = 2 mA, supporting stable biasing across temperature.

Designed for AF input stages, it achieves low noise figure (F = 1–4 dB) at I_C = 0.2 mA and exhibits C_cb = 1.5 pF and C_eb = 8 pF - critical for bandwidth control and stability in multi-stage amplifiers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - supports rail-to-rail operation in 24 V automotive preamp stages without breakdown risk
h_FE (I_C = 2 mA)	420–520 - ensures predictable bias point stability in discrete gain blocks with minimal variation
V_CE(sat)	300 mV max - reduces power loss and self-heating in linear driver applications
f_T	250 MHz - enables stable gain up to mid-VHF range, suitable for RF front-end buffering
C_cb	1.5 pF - limits Miller effect in high-gain CE amplifiers, preserving phase margin
Noise Figure	1–4 dB at 1 kHz - meets low-noise requirements for microphone preamplifier input stages
R_thJS	≤105 K/W - allows 250 mW dissipation at T_S ≤ 124 °C in SOT323 footprint

Pinout & Package

BC858CWH6327XTSA1 is housed in a RoHS-compliant SOT323 plastic surface-mount package (3-pin, lead pitch 0.65 mm), optimized for automated assembly and thermal performance in space-constrained PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Accepts base drive current to modulate collector current; requires series resistor for stable biasing
2 (Emitter)	Reference terminal for PNP operation	Connected to higher potential rail; defines voltage reference for V_BE and saturation behavior
3 (Collector)	Output current sink	Delivers amplified current to load; polarity reversed vs NPN - sinks current when active

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements - supports under-hood deployment
Low V_CE(sat)	300 mV max at I_C/I_B = 20 - minimizes conduction loss in active-load switching circuits
Group C h_FE	Guaranteed 420–520 range - eliminates binning during production and simplifies design margining
Low-noise AF performance	F = 1–4 dB (1 kHz, 200 Hz BW) - enables use in sensitive analog front-ends without added filtering
SOT323 thermal profile	R_thJS ≤ 105 K/W - sustains 250 mW continuous dissipation with controlled junction rise

Applications

Automotive Cabin Audio Preamp

Industrial Sensor Signal Conditioning

Use Scenario: Amplifying low-level signals from piezoelectric knock sensors before ADC sampling.

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

Use Value: Group C h_FE ensures consistent gain across temperature; low noise preserves SNR in sub-10 mV signal paths.

Use Scenario: Level-shifting and buffering 4–20 mA loop transmitter outputs into microcontroller inputs.

IC Role / Device Role / Timing Role: Emitter-follower buffer with rail-referenced output for current-loop interface isolation.

Use Value: Low V_CE(sat) maintains headroom below 3.3 V supply; AEC-Q101 rating supports industrial-grade reliability.

Consumer Audio Input Stage

Power Supply Error Amplifier

Use Scenario: First gain stage in portable headphone amplifier ICs handling line-in signals.

IC Role / Device Role / Timing Role: High-linearity PNP transistor in dual-supply discrete op-amp input pair.

Use Value: f_T = 250 MHz and C_cb = 1.5 pF support wideband response up to 20 kHz with minimal phase shift.

Use Scenario: Compensating feedback loop in isolated flyback SMPS controllers.

IC Role / Device Role / Timing Role: Transconductance element in error amplifier stage driving optocoupler LED.

Use Value: Stable h_FE over temperature ensures consistent loop gain; SOT323 footprint fits tight layout constraints.

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
BC858BWH6327XTSA1	h_FE = 220–480 (group B); lower gain consistency at low I_C	Suitable where moderate gain variation is acceptable in cost-sensitive consumer designs	Select when tighter h_FE tolerance is not required and BOM cost reduction is prioritized
MMBT3906LT1G	V_CEO = 40 V; h_FE = 100–300; R_thJS = 200 K/W (SOT23)	Better voltage margin but higher thermal resistance and wider h_FE spread	Prefer for higher-voltage bias networks where gain spread is tolerable and board space permits SOT23

Compared with BC858BWH6327XTSA1 and MMBT3906LT1G, BC858CWH6327XTSA1 offers superior h_FE consistency for precision analog gain stages and better thermal performance in SOT323 - making it optimal for automotive and industrial signal chains demanding repeatability and reliability.

Availability

BC858CWH6327XTSA1 is available at Aetrix Electronics and suitable for automotive cabin audio preamps, industrial sensor signal conditioning, consumer audio input stages, and power supply error amplifiers requiring stable component supply and AEC-Q101 compliance.

Supply support for BC858CWH6327XTSA1 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 and discrete devices.

BC858CWH6327XTSA1 belongs to Infineon's BC856–BC860 family of AEC-Q101-qualified PNP transistors engineered for high-reliability analog signal processing in automotive and industrial environments.

FAQ

Is BC858CWH6327XTSA1 pin-compatible with BC858BWH6327XTSA1?

Yes - both share identical SOT323 package, pin assignment (1=Base, 2=Emitter, 3=Collector), and mechanical footprint. The only functional difference lies in guaranteed h_FE range: group C (420–520) vs group B (220–480). No PCB redesign is needed for substitution within same bias network.

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum junction temperature is 150 °C. With R_thJS ≤ 105 K/W and P_tot = 250 mW at T_S ≤ 124 °C, sustained operation requires board-level thermal management to keep solder-point temperature below 124 °C - verified via IR thermography or thermal simulation.

Does BC858CWH6327XTSA1 support pulsed operation beyond its DC power rating?

Yes - permissible pulse load ratio (P_tot(max)/P_tot(DC)) reaches 3× for t_p < 100 µs at D = 0.01. This enables short-duration peak current handling in switching regulators or audio clipping limiters without exceeding thermal limits.

Can this transistor be used in complementary pair configurations with NPN types?

Yes - BC858C is explicitly designated as complementary to BC848C (NPN). Both share matched V_CE(sat), h_FE grouping, and thermal characteristics, enabling balanced push-pull output stages in Class AB audio drivers and precision current mirrors.

BC858CWH6327XTSA1 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:: 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

BC858CWH6327XTSA1 FAQ

1.How can I place an order for BC858CWH6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC858CWH6327XTSA1 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 BC858CWH6327XTSA1 reliable?

The price and inventory of BC858CWH6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC858CWH6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BC858CWH6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC858CWH6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC858CWH6327XTSA1?

BC858CWH6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC858CWH6327XTSA1 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 BC858CWH6327XTSA1?

For technical support, including BC858CWH6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC858CWH6327XTSA1 requirements.

6.How does Aetrix verify that BC858CWH6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BC858CWH6327XTSA1 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 BC858CWH6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BC858CWH6327XTSA1?

All BC858CWH6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC858CWH6327XTSA1, 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 BC858CWH6327XTSA1 part is unused and in its original packaging.

Return procedure for BC858CWH6327XTSA1:

1.Submit a request within 90 days.

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

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