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Infineon Technologies BC857CWH6327XTSA1
- Part No.:
- BC857CWH6327XTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC857CWH6327XTSA1.pdf
- Description:
- TRANS PNP 45V 0.1A PG-SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,369
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Product details
Overview
BC857CWH6327XTSA1 from Infineon Technologies is a PNP silicon small-signal transistor optimized for audio-frequency input stages and driver circuits. It delivers high DC current gain (hFE = 420–520 at IC = 2 mA), low VCE(sat) (≤300 mV at IC = 10 mA / IB = 0.5 mA), and low noise (F = 1–4 dB at 1 kHz), making it suitable for precision analog amplification in automotive and industrial sensor signal conditioning.
For engineers reviewing the BC857CWH6327XTSA1 datasheet, BC857CWH6327XTSA1 pinout, BC857CWH6327XTSA1 application, or BC857CWH6327XTSA1 equivalent, key selection criteria include verified hFE group C performance, SOT-323 package thermal resistance (RthJS ≤ 90 K/W), AEC-Q101 qualification, and complementary NPN pairing with BC847C variants.
Technical Context
This PNP transistor operates in linear active and saturation regions with guaranteed hFE spread across three groups (A/B/C) - BC857C specifies hFE ≥ 420 at IC = 10 µA and ≥ 480 at IC = 2 mA. Its fT = 250 MHz enables stable operation up to mid-VHF range despite being an AF device.
Designed for low-noise analog front-ends, it features Ceb = 8 pF and Ccb = 1.5 pF at rated bias, supporting wideband stability in emitter-follower and common-emitter configurations. The 45 V VCEO rating and 50 V VCBO support robust operation in 24 V industrial rails with margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Supports operation in 24 V systems with ≥85 % voltage headroom before breakdown |
| hFE (IC = 2 mA) | 480–520 - Enables high-gain, low-base-drive amplifier stages with predictable bias stability |
| VCE(sat) | ≤300 mV @ IC/IB = 10 mA/0.5 mA - Minimizes power loss and self-heating in switching/driver applications |
| fT | 250 MHz - Ensures phase margin retention in feedback loops up to ~25 MHz closed-loop bandwidth |
| Ceb | 8 pF - Limits Miller effect in common-emitter gain stages; compatible with 2 kΩ source impedances |
| Noise figure | 1–4 dB @ 1 kHz - Meets low-noise requirements for microphone preamps and sensor interface amplifiers |
| RthJS | ≤90 K/W - Allows 250 mW dissipation at TS ≤ 128 °C; supports compact PCB layout without forced cooling |
Pinout & Package
BC857CWH6327XTSA1 is housed in a RoHS-compliant SOT-323 (SC-70) plastic surface-mount package with standard pin assignment and thermal pad design optimized for reflow soldering and board-level reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current sink node; connects to higher-potential rail in PNP common-emitter configuration |
| 2 (Base) | B | Control terminal; requires current-limited drive due to forward-biased BE junction (VBE(on) ≈ 0.65 V) |
| 3 (Collector) | C | Output node; carries load current toward ground; thermally coupled to package backside in SOT-323 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, and ESD |
| Low-noise operation | F = 1–4 dB at 1 kHz enables use in microphone preamplifiers without added noise filtering |
| High hFE group C | Guaranteed hFE ≥ 480 at IC = 2 mA ensures consistent gain matching in multi-channel analog designs |
| Complementary NPN pairing | Direct match with BC847C allows balanced push-pull output stages and differential pair implementations |
| Pb-free & RoHS compliant | Meets EU Directive 2011/65/EU; no exemption required for lead content in die attach or plating |
Applications
| Automotive Cabin Sensors | Industrial Current Sensing |
|---|---|
|
Use Scenario: Amplifying millivolt-level signals from thermistors and pressure transducers in HVAC control modules. IC Role / Device Role / Timing Role: PNP small-signal amplifier in DC-coupled instrumentation amplifier front-end. Use Value: Low VCE(sat) and 1–4 dB noise figure preserve SNR across -40 °C to +125 °C ambient range. |
Use Scenario: High-side current sense amplifier stage feeding ADC inputs in motor drive protection circuits. IC Role / Device Role / Timing Role: Active load transistor in precision shunt-based current mirror topology. Use Value: Tight hFE tolerance (480–520) ensures <±1.5% gain error across temperature and unit variance. |
| Audio Signal Conditioning | Power Supply Sequencing |
|
Use Scenario: Input buffer for line-level audio in infotainment head units with 2.5 V–5 V supply rails. IC Role / Device Role / Timing Role: Emitter-follower voltage buffer isolating DAC output from variable load impedance. Use Value: Ceb = 8 pF and fT = 250 MHz maintain flat frequency response to 20 kHz with <0.05 dB ripple. |
Use Scenario: Enabling/disabling auxiliary power rails during cold-start sequencing in ADAS ECUs. IC Role / Device Role / Timing Role: Saturated switch controlling gate of external PMOS high-side FET. Use Value: VCE(sat) ≤ 300 mV limits voltage drop and self-heating during 100 ms enable pulses. |
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, but in SOT-23 package with RthJS ≤ 240 K/W and lower Ptot (330 mW @ TS ≤ 71 °C) | Limited to lower-power, non-automotive applications due to non-AEC-Q101 qualification and reduced thermal capability | Select when cost-sensitive consumer designs require identical gain but relaxed thermal and qualification requirements |
| MMBT857LT1G | hFE = 300–600 (wider spread), same SOT-323, AEC-Q101 qualified, but VCEO = 40 V and VCE(sat) ≤ 400 mV | Acceptable in less demanding automotive subsystems where 5 V margin below 45 V rating is acceptable | Choose when broader hFE tolerance is acceptable and sourcing flexibility across ON Semiconductor channels is prioritized |
Compared with BC857CWH6327XTSA1, BC857CTA trades thermal performance and qualification for cost, while MMBT857LT1G offers wider hFE tolerance and slightly lower voltage ratings - both require redesign validation for AEC-Q101-critical functions.
Availability
BC857CWH6327XTSA1 is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial current sensing, audio signal conditioning, and power supply sequencing requiring stable component supply and long-term lifecycle assurance.
Supply support for BC857CWH6327XTSA1 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.
This transistor belongs to Infineon's BC856–BC860 family of AEC-Q101-qualified PNP transistors engineered for reliable analog signal amplification and switching in harsh-environment automotive and industrial control systems.
FAQ
Is BC857CWH6327XTSA1 pin-compatible with BC847C?
No - BC857CWH6327XTSA1 is a PNP transistor with E-B-C pinout (1-2-3), while BC847C is NPN with E-B-C pinout in the same SOT-323 package. They are complementary, not pin-compatible. Swapping them without circuit revision causes polarity inversion and functional failure.
What is the maximum continuous collector current for BC857CWH6327XTSA1?
The absolute maximum continuous collector current is 100 mA per datasheet Section 3. Derating applies above TS = 128 °C; at 100 °C board temperature, usable IC drops to approximately 75 mA to maintain Ptot ≤ 250 mW and junction temperature below 150 °C.
Does BC857CWH6327XTSA1 support pulsed operation beyond its DC ratings?
Yes - pulse operation up to 200 mA peak is allowed with duty cycle ≤ 2 % and pulse width ≤ 300 µs (per datasheet pulse test condition). Thermal transient analysis confirms safe operation under these constraints without exceeding Tj = 150 °C.
Can BC857CWH6327XTSA1 be used in RF applications above 10 MHz?
While fT = 250 MHz suggests theoretical RF capability, the device is characterized and qualified only for AF applications (≤15 kHz noise bandwidth, specified gain at 1 kHz). Its Ccb/Ceb and packaging lack RF-optimized layout; use dedicated RF transistors for >1 MHz signal paths.
BC857CWH6327XTSA1 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):
- 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
BC857CWH6327XTSA1 FAQ
1.How can I place an order for BC857CWH6327XTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857CWH6327XTSA1 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 BC857CWH6327XTSA1 reliable?
The price and inventory of BC857CWH6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857CWH6327XTSA1 is usually 5 days.
3.What payment methods are accepted for BC857CWH6327XTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857CWH6327XTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857CWH6327XTSA1?
BC857CWH6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857CWH6327XTSA1 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 BC857CWH6327XTSA1?
For technical support, including BC857CWH6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857CWH6327XTSA1 requirements.
6.How does Aetrix verify that BC857CWH6327XTSA1 is sourced from the original manufacturer or authorized distributors?
All BC857CWH6327XTSA1 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 BC857CWH6327XTSA1 meets industry standards.
7.What is the process for return or replacement of BC857CWH6327XTSA1?
All BC857CWH6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC857CWH6327XTSA1, 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 BC857CWH6327XTSA1 part is unused and in its original packaging.
Return procedure for BC857CWH6327XTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC857CWH6327XTSA1 Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
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MMBT3904LT1G
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MMBT3906-7-F
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MMBT2222A-7-F
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BC846BLT1G
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BC847B,215
Nexperia USA Inc.
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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