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Infineon Technologies BC 856A E6327
- Part No.:
- BC 856A E6327
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC 856A E6327.pdf
- Description:
- TRANS PNP 65V 0.1A PG-SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,097
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Product details
Overview
BC856A E6327 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 (hFE = 125–250 at IC = 10 µA), low VCE(sat) (≤250 mV at IC = 10 mA/IB = 0.5 mA), and low noise (1 dB typical at 1 kHz, 200 Hz bandwidth) in SOT23 package. Used in bias networks, level shifters, and discrete amplifier front-ends.
For engineers reviewing the BC856A E6327 datasheet, BC856A E6327 pinout, BC856A E6327 application, or BC856A E6327 equivalent, key selection criteria include guaranteed hFE group A performance, AEC-Q101 qualification for automotive use, RoHS-compliant SOT23 packaging, and validated thermal resistance (RthJS ≤ 240 K/W).
Technical Context
This PNP transistor operates with VCEO = 65 V and VCBO = 80 V, supporting robust blocking in low-voltage analog signal paths. Its fT = 250 MHz (typ.) enables stable operation up to mid-VHF range in active loads and oscillator biasing.
Designed for linear amplification, it exhibits low base-emitter on-voltage (VBE(ON) = 600–750 mV at IC = 2 mA), tight hFE grouping (A/B/C), and specified noise performance across 30 Hz–15 kHz - critical for audio preamp and sensor interface stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - supports rail-to-rail swing in ±30 V analog supplies without breakdown |
| hFE (IC = 10 µA) | 125–250 - ensures predictable DC bias stability in high-gain CE configurations |
| VCE(sat) | ≤250 mV @ IC/IB = 10 mA/0.5 mA - minimizes power loss in saturated switch/driver roles |
| fT | 250 MHz typ. - enables reliable operation in RF bias networks and wideband active filters |
| Noise figure | 1 dB typ. @ 1 kHz, 200 Hz BW - meets low-noise requirements for microphone preamps and sensor amplifiers |
| RthJS | ≤240 K/W - allows 330 mW dissipation at TS ≤ 71 °C in standard PCB layouts |
Pinout & Package
BC856A E6327 is housed in a RoHS-compliant SOT23 plastic surface-mount package (JEDEC TO-236AB), with standardized 3-pin layout optimized for automated assembly and thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Current-controlled input node | Accepts base drive to modulate collector current; requires series resistor for stable biasing |
| 2 (Emitter) | Reference terminal / current source output | Connected to higher potential in PNP configuration; defines emitter-follower or common-base reference |
| 3 (Collector) | Output current sink | Drains load current to ground or negative rail; voltage swing limited by VCEO rating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements (HTOL, TC, HAST) |
| Low VCE(sat) | Reduces conduction loss in discrete driver stages, improving efficiency in LED and relay drivers |
| Group A hFE binning | Guarantees minimum DC gain of 125 at low IC, enabling consistent bias point setting across production lots |
| Low 1/f noise | Enables use in precision DC-coupled amplifiers and low-frequency sensor interfaces without added filtering |
Applications
| Audio Preamp Stage | Automotive Door Module |
|---|---|
Use Scenario: Discrete two-stage CE amplifier for electret microphone signal conditioning in portable audio devices. IC Role / Device Role / Timing Role: PNP small-signal transistor providing first-stage voltage gain and impedance transformation. Use Value: Low noise (1 dB) and stable hFE ensure SNR > 65 dB over temperature; SOT23 footprint enables compact layout near mic capsule. | Use Scenario: Load switching for window lift motor control logic in OEM door modules. IC Role / Device Role / Timing Role: Saturated PNP switch driving optocoupler input or level-shifting logic signals. Use Value: VCE(sat) ≤ 250 mV reduces heat generation during continuous 10 mA drive; AEC-Q101 ensures reliability over 15-year vehicle life. |
| Industrial Sensor Interface | Power Supply Bias Network |
Use Scenario: Current-source bias for bridge-based pressure sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Constant-current generator using emitter-degeneration topology. Use Value: Tight hFE tolerance (±15% in Group A) maintains <±0.5% current drift across batches; low VBE variation improves accuracy. | Use Scenario: Base bias network for pass transistor in linear regulator feedback loop. IC Role / Device Role / Timing Role: Precision current mirror reference element in adjustable LDO error amplifier stage. Use Value: Matched hFE and low Ccb (1.5 pF) prevent phase shift-induced instability at 100 kHz crossover frequencies. |
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 |
|---|---|---|---|
| BC857A E6327 | VCEO = 45 V, VCBO = 50 V; same SOT23 package and hFE group A | Limited to lower-voltage rails (e.g., 24 V industrial systems); not suitable for 48 V telecom bias | Select when VCE stress remains <40 V and cost optimization is prioritized |
| MMBT3906LT1G | hFE min = 100 (no group binning), RthJS = 375 K/W, non-AEC-Q101 | Higher thermal resistance limits power handling; lacks automotive qualification | Use only in commercial-grade consumer products where qualification and thermal margin are non-critical |
Compared with BC856A E6327, BC857A E6327 trades 20 V collector-emitter rating for identical gain and noise but lower cost, while MMBT3906LT1G sacrifices AEC-Q101 compliance and thermal performance for broader distributor availability and legacy design continuity.
Availability
BC856A E6327 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, and portable audio preamplifiers requiring stable component supply and long-term lifecycle support.
Supply support for BC856A E6327 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.
BC856A belongs to Infineon's BC846–BC860 family of AEC-Q101-qualified PNP/NPN transistor pairs, engineered for high-reliability analog signal conditioning and driver functions in harsh-environment electronics.
FAQ
Is BC856A E6327 pin-compatible with BC846A?
No - BC856A is PNP while BC846A is NPN; both share SOT23 package and identical pinout (1=Base, 2=Emitter, 3=Collector), but polarity reversal means direct substitution causes circuit failure unless topology is redesigned for complementary operation.
What is the maximum allowable junction temperature during pulsed operation?
The absolute maximum junction temperature remains 150 °C under all conditions. For pulsed operation (duty cycle D < 2%), peak power may reach 330 mW provided average power stays within DC derating curves and TJ does not exceed 150 °C - verified via thermal simulation using RthJS ≤ 240 K/W.
Does BC856A E6327 support lead-free reflow soldering profiles?
Yes - it is RoHS-compliant and qualified for standard lead-free reflow profiles (J-STD-020D), including peak temperatures up to 260 °C for 10 seconds. The SOT23 package withstands thermal cycling without delamination or wire-bond degradation.
How does hFE vary with collector current in BC856A E6327?
hFE peaks near IC = 2 mA (140–250 for Group A), declines gradually above 10 mA, and drops below 100 at IC > 50 mA. Data sheet Figure 6 confirms this trend, making 2–10 mA the optimal linear operating range for gain-critical applications.
BC 856A E6327 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 65 V
- Vce Saturation (Max) @ Ib, Ic:
- 650mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 125 @ 2mA, 5V
- Power - Max:
- 330 mW
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT23
BC 856A E6327 FAQ
1.How can I place an order for BC 856A E6327 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC 856A E6327 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 BC 856A E6327 reliable?
The price and inventory of BC 856A E6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC 856A E6327 is usually 5 days.
3.What payment methods are accepted for BC 856A E6327?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC 856A E6327 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC 856A E6327?
BC 856A E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC 856A E6327 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 BC 856A E6327?
For technical support, including BC 856A E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC 856A E6327 requirements.
6.How does Aetrix verify that BC 856A E6327 is sourced from the original manufacturer or authorized distributors?
All BC 856A E6327 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 BC 856A E6327 meets industry standards.
7.What is the process for return or replacement of BC 856A E6327?
All BC 856A E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BC 856A E6327, 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 BC 856A E6327 part is unused and in its original packaging.
Return procedure for BC 856A E6327:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC 856A E6327 Tags
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