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Infineon Technologies BC857CWE6327BTSA1
- Part No.:
- BC857CWE6327BTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC857CWE6327BTSA1.pdf
- Description:
- TRANS PNP 45V 0.1A PG-SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,002
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Product details
Overview
BC857CWE6327BTSA1 from Infineon Technologies is a PNP silicon small-signal transistor in SOT323 package, rated for VCEO = 45 V, IC = 100 mA, and hFE = 420–800 (at IC = 2 mA), optimized for low-noise audio-frequency input stages and driver circuits in automotive and industrial applications.
For engineers reviewing the BC857CWE6327BTSA1 datasheet, BC857CWE6327BTSA1 pinout, BC857CWE6327BTSA1 application, or BC857CWE6327BTSA1 equivalent, key selection criteria include guaranteed hFE group C performance, AEC-Q101 qualification, low VCE(sat) ≤ 300 mV at IC = 10 mA / IB = 0.5 mA, and noise figure F = 1–4 dB at 1 kHz.
Technical Context
This device operates as a general-purpose PNP bipolar junction transistor with complementary NPN pairing to BC847C/BC848C series. Its design emphasizes high DC current gain stability across IC = 10 µA to 100 mA and low base-emitter on-voltage (VBE(ON) = 650–820 mV at IC = 10 mA).
Thermal performance is defined by RthJS ≤ 90 K/W (for BC857BF variant) and Tj = 150 °C maximum junction temperature. It supports pulse operation up to D = 5% duty cycle with validated thermal derating curves per Infineon Application Note Thermal Resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe operating voltage headroom in linear amplifier stages. |
| hFE (IC = 2 mA) | 420–800 - Group C DC current gain range ensures predictable biasing and minimal base drive requirements in low-power switching/driver designs. |
| VCE(sat) | ≤300 mV @ IC = 10 mA / IB = 0.5 mA - Low saturation voltage reduces conduction loss and self-heating in saturated-switch applications. |
| fT | 250 MHz typ. @ IC = 20 mA - Enables stable amplification up to mid-VHF range; sufficient for AF and low-speed digital signal conditioning. |
| F (Noise Figure) | 1–4 dB @ IC = 0.2 mA, f = 1 kHz - Confirmed low-noise performance critical for microphone preamps and sensor front-ends. |
| RthJS | ≤90 K/W - Junction-to-solder-point thermal resistance enables reliable power dissipation up to 250 mW at TS ≤ 128 °C. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
BC857CWE6327BTSA1 is housed in a RoHS-compliant SOT323 plastic surface-mount package (3-pin, lead pitch 0.65 mm), with standard pin configuration: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Current-controlled input terminal | Receives base current to regulate collector-emitter conduction; requires external bias network for stable Q-point setting. |
| 2 (Emitter) | Common reference terminal (grounded or biased) | Provides return path for emitter current; polarity determines PNP operation-must be at higher potential than base and collector in active mode. |
| 3 (Collector) | Output current terminal | Sinks load current when transistor is active/saturated; connected to positive rail via load in common-emitter configuration. |
Key Features
| Feature | Design Value |
|---|---|
| High hFE group C | Guaranteed hFE ≥ 420 at IC = 2 mA enables precise current mirror matching and low-base-drive logic interfacing. |
| Low VCE(sat) | Max 300 mV at IC = 10 mA / IB = 0.5 mA minimizes power loss and improves efficiency in discrete switch implementations. |
| Low-noise AF performance | F = 1–4 dB at 1 kHz allows use in sensitive analog front-ends without requiring additional noise-filtering components. |
| AEC-Q101 qualification | Validated reliability for automotive ambient conditions (−40 °C to +125 °C case temperature, vibration, humidity). |
| SOT323 footprint | Compact 2.1 × 1.3 × 0.95 mm package supports high-density PCB layouts and automated reflow assembly. |
Applications
| Automotive Door Module Driver | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving LED indicators and small solenoids in vehicle door control units under 12 V supply. IC Role / Device Role / Timing Role: PNP switch controlling current sink to ground for indicator loads. Use Value: Low VCE(sat) ensures <15 mW conduction loss per channel, reducing thermal load in sealed modules. | Use Scenario: Amplifying low-level thermistor or RTD bridge outputs in programmable logic controller (PLC) analog input cards. IC Role / Device Role / Timing Role: Discrete emitter-follower buffer stage providing impedance transformation and DC-coupled gain stability. Use Value: hFE ≥ 420 and F ≤ 4 dB maintain signal integrity over −40 °C to +85 °C operating range. |
| Audio Pre-amplifier Stage | Power Supply Enable Switch |
Use Scenario: First-stage amplification of electret microphone signals in voice-activated IoT edge devices. IC Role / Device Role / Timing Role: Common-emitter low-noise amplifier with fixed-bias network and emitter degeneration. Use Value: Verified 1–4 dB noise figure at 1 kHz enables >65 dB SNR in 20 Hz–15 kHz bandwidth without op-amp complexity. | Use Scenario: Enabling/disabling auxiliary 3.3 V LDO rails in multi-rail embedded systems using microcontroller GPIO. IC Role / Device Role / Timing Role: High-gain PNP level shifter and current amplifier driving MOSFET gate or enable pin. Use Value: hFE ≥ 420 ensures full turn-on with <10 µA MCU output current, eliminating need for buffer ICs. |
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 |
|---|---|---|---|
| BC857CTA | Same hFE group C, identical SOT323 package, but non-AEC-Q101 qualified and no guaranteed 150 °C Tj rating. | Not suitable for automotive environments; acceptable for commercial-grade consumer electronics. | Select if AEC-Q101 compliance and extended temperature validation are not required. |
| MMBT857 | Identical electrical specs and SOT23 package; pinout differs (SOT23: Pin 1=E, Pin 2=B, Pin 3=C vs. SOT323: Pin 1=B, Pin 2=E, Pin 3=C). | Requires PCB layout revision due to reversed base/emitter pins and larger footprint. | Choose only when SOT23 is preferred and board redesign is feasible. |
Compared with BC857CTA and MMBT857, BC857CWE6327BTSA1 uniquely combines AEC-Q101 qualification, SOT323 compactness, and guaranteed hFE group C performance-making it optimal for space-constrained automotive and industrial signal-path designs where reliability and consistency are non-negotiable.
Availability
BC857CWE6327BTSA1 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC analog input cards, audio pre-amplifiers, and power supply enable switches requiring stable component supply and long-term lifecycle assurance.
Supply support for BC857CWE6327BTSA1 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.
This part belongs to Infineon's BC856–BC860 family of AEC-Q101-qualified PNP transistors designed specifically for high-reliability, low-noise, and high-gain signal conditioning in automotive and industrial environments.
FAQ
What is the maximum continuous collector current for BC857CWE6327BTSA1?
The absolute maximum continuous collector current is 100 mA at TS ≤ 128 °C. Derating applies above this temperature: total power dissipation drops linearly to zero at 150 °C junction temperature. Peak pulsed current is rated at 200 mA with D ≤ 2% duty cycle and tp < 300 µs.
Is BC857CWE6327BTSA1 pin-compatible with BC847C?
No-BC857CWE6327BTSA1 is a PNP transistor while BC847C is its complementary NPN counterpart. They share identical SOT323 package dimensions and pin numbering (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector), but polarity reversal means direct substitution would invert circuit function and likely cause failure.
Does BC857CWE6327BTSA1 require a heatsink in typical applications?
No heatsink is required. With RthJS ≤ 90 K/W and Ptot = 250 mW at TS = 128 °C, the device remains within safe thermal limits when mounted on standard FR-4 PCBs with ≥1 cm² copper pour. Thermal simulation confirms Tj stays below 135 °C at 100 mA DC in still air.
Can BC857CWE6327BTSA1 be used in RF applications above 10 MHz?
It is not recommended for RF amplification above 30 MHz. While fT = 250 MHz (typ.) suggests theoretical capability, measured Ccb = 1.5 pF and Ceb = 8 pF limit usable bandwidth in tuned circuits; verified performance is specified only up to 15 kHz for low-noise AF use and up to 100 MHz for small-signal gain characterization-not for impedance-matched RF stages.
BC857CWE6327BTSA1 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):
- 45 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
BC857CWE6327BTSA1 FAQ
1.How can I place an order for BC857CWE6327BTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857CWE6327BTSA1 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 BC857CWE6327BTSA1 reliable?
The price and inventory of BC857CWE6327BTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857CWE6327BTSA1 is usually 5 days.
3.What payment methods are accepted for BC857CWE6327BTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857CWE6327BTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857CWE6327BTSA1?
BC857CWE6327BTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857CWE6327BTSA1 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 BC857CWE6327BTSA1?
For technical support, including BC857CWE6327BTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857CWE6327BTSA1 requirements.
6.How does Aetrix verify that BC857CWE6327BTSA1 is sourced from the original manufacturer or authorized distributors?
All BC857CWE6327BTSA1 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 BC857CWE6327BTSA1 meets industry standards.
7.What is the process for return or replacement of BC857CWE6327BTSA1?
All BC857CWE6327BTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC857CWE6327BTSA1, 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 BC857CWE6327BTSA1 part is unused and in its original packaging.
Return procedure for BC857CWE6327BTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC857CWE6327BTSA1 Tags
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