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Infineon Technologies BC856A-E6327
- Part No.:
- BC856A-E6327
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC856A-E6327.pdf
- Description:
- TRANS PNP 65V 0.1A PG-SOT23-3-1
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
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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 VCEO = 65 V, hFE = 125–220 (at IC = 10 µA), VCE(sat) ≤ 250 mV (at IC = 10 mA/IB = 0.5 mA), and fT = 250 MHz - enabling low-noise amplification in compact analog signal paths.
For engineers reviewing the BC856A-E6327 datasheet, BC856A-E6327 pinout, BC856A-E6327 application, or BC856A-E6327 equivalent, key selection criteria include its AEC-Q101 qualification, SOT23 package compatibility, complementary pairing with BC846A–BC850A NPN types, and verified performance across –65 °C to +150 °C operating range.
Technical Context
This PNP transistor operates with fixed-emitter biasing in common-emitter configuration, supporting linear amplification and switching functions up to 100 mA DC collector current. Its low VCE(sat) and high hFE group A specification ensure efficient gain control in low-power AF preamplifier stages.
The device features low noise (F = 1 dB typ. at 1 kHz) and stable h-parameter behavior (h21e = 200–330, h11e = 2.7 kΩ typ.) under 2 mA / 5 V bias conditions - critical for maintaining SNR in battery-powered audio front-ends and sensor interface drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - supports rail-to-rail operation in 48 V and lower automotive/industrial supply domains |
| hFE (IC = 10 µA) | 125–220 - enables stable small-signal gain without external emitter degeneration |
| VCE(sat) | ≤250 mV @ IC/IB = 10 mA/0.5 mA - minimizes conduction loss in active-load switching applications |
| fT | 250 MHz - ensures adequate bandwidth for wideband AF and narrowband RF bias networks |
| Ccb | 1.5 pF - limits Miller effect in high-gain CE amplifier designs up to 10 MHz |
| Thermal RthJS | ≤240 K/W - allows 330 mW dissipation at TS ≤ 71 °C in standard PCB layouts |
| Operating Tj | –65 °C to +150 °C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
BC856A-E6327 is housed in a RoHS-compliant SOT23 plastic surface-mount package with gull-wing leads, optimized for automated placement and reflow soldering on 0.8 mm thick FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Current-controlled input node | Receives forward-biased base drive to enable PNP conduction; requires current-limiting resistor in series |
| 2 (Emitter) | Common reference terminal | Connected to higher-potential rail (e.g., VCC) in CE configuration; sets bias point for linear operation |
| 3 (Collector) | Output current sink | Delivers amplified output current to load; polarity inverted relative to base input in CE topology |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise AF operation | F = 1 dB typ. at 1 kHz - preserves signal integrity in microphone preamps and sensor signal chains |
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports Tier-1 BOM inclusion |
| Complementary NPN pairing | Designed as direct counterpart to BC846A - simplifies push-pull stage layout and thermal matching |
| Pb-free construction | Meets RoHS Directive 2011/65/EU - eliminates lead contamination risk in end-product recycling streams |
Applications
| Audio Input Stage | Automotive Door Module Driver |
|---|---|
Use Scenario: Low-level signal amplification from electret condenser microphones in voice-command interfaces. IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration with emitter-degenerated bias network. Use Value: Achieves >60 dB SNR at 1 kHz due to 1 dB noise figure and 250 MHz fT, enabling clean digitization by downstream ADCs. | Use Scenario: Driving LED status indicators and small solenoid latches in vehicle door control units. IC Role / Device Role / Timing Role: Switching transistor controlling 20 mA LED loads and 80 mA latch coils from MCU GPIO pins. Use Value: VCE(sat) ≤ 250 mV ensures <10 mW power loss per channel, reducing thermal load in sealed modules. |
| Industrial Sensor Interface | Power Supply Enable Control |
Use Scenario: Amplifying millivolt-level outputs from RTD or thermocouple signal conditioners. IC Role / Device Role / Timing Role: First-stage gain block with precision DC-coupled biasing and low-drift hFE. Use Value: Stable hFE group A (125–220) and ±5 VEB rating support accurate 2-wire/3-wire bridge excitation circuitry. | Use Scenario: Enabling/disabling auxiliary 3.3 V LDO regulators via MCU logic-level signals. IC Role / Device Role / Timing Role: High-side switch controlling LDO EN pin with inverted logic polarity. Use Value: 65 V VCEO provides margin against supply transients; 150 °C Tj(max) ensures reliability during thermal cycling. |
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 |
|---|---|---|---|
| BC856B-E6327 | Higher hFE range (220–420 at IC = 10 µA); otherwise identical ratings and package | Preferred where higher open-loop gain reduces need for feedback components in discrete op-amp designs | Select when tighter hFE tolerance improves production yield in gain-critical analog stages |
| MMBT856 | Same VCEO/VCBO/IC specs but lower fT (150 MHz) and higher VCE(sat) (300 mV) | Suitable for non-audio switching only; not recommended for low-noise AF amplification | Choose only if cost sensitivity outweighs bandwidth and noise requirements |
Compared with BC856B-E6327, the BC856A-E6327 offers lower and more predictable hFE, easing stability analysis in feedback networks; versus MMBT856, it delivers superior high-frequency response and lower saturation loss - critical for precision analog and automotive-grade designs.
Availability
BC856A-E6327 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer audio input stages requiring stable component supply and long-term lifecycle assurance.
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.
The BC856A-E6327 belongs to Infineon's BC856–BC860 family of AEC-Q101-qualified PNP transistors engineered for reliable AF amplification and driver functions in harsh-environment electronics.
FAQ
Is BC856A-E6327 pin-compatible with BC846A?
No - BC856A-E6327 is a PNP transistor with Base-Emitter-Collector pinout (1-2-3), while BC846A is an NPN device with identical SOT23 mechanical footprint but reversed polarity. They are complementary, not pin-compatible; swapping requires board-level polarity reversal.
What is the maximum continuous collector current for BC856A-E6327?
The absolute maximum continuous collector current is 100 mA at TS ≤ 71 °C. Derating applies above this temperature: power dissipation drops linearly to zero at 150 °C junction temperature, per the 330 mW Ptot rating and 240 K/W RthJS.
Does BC856A-E6327 support pulsed operation beyond its DC ratings?
Yes - it supports peak collector currents up to 200 mA for pulse widths ≤10 ms (duty cycle ≤2%), enabled by its 330 mW DC power limit and thermal time constant. Pulse derating curves are provided in Infineon Application Note AN2008-04-29 Figure EHP00377.
Can BC856A-E6327 be used in high-frequency oscillator circuits?
It is not recommended for oscillator core use. While fT = 250 MHz indicates usable gain at VHF, the device lacks specified phase noise, capacitance matching, or stability factors required for reliable LC or crystal oscillator design - it is characterized and qualified for AF amplification and switching only.
BC856A-E6327 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT23-3-1
BC856A-E6327 FAQ
1.How can I place an order for BC856A-E6327 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856A-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 BC856A-E6327 reliable?
The price and inventory of BC856A-E6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856A-E6327 is usually 5 days.
3.What payment methods are accepted for BC856A-E6327?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856A-E6327 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856A-E6327?
BC856A-E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856A-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 BC856A-E6327?
For technical support, including BC856A-E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856A-E6327 requirements.
6.How does Aetrix verify that BC856A-E6327 is sourced from the original manufacturer or authorized distributors?
All BC856A-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 BC856A-E6327 meets industry standards.
7.What is the process for return or replacement of BC856A-E6327?
All BC856A-E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BC856A-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 BC856A-E6327 part is unused and in its original packaging.
Return procedure for BC856A-E6327:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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