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Infineon Technologies BC 857BT E6327
- Part No.:
- BC 857BT E6327
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- SC-75, SOT-416
- Datasheet:
-
BC 857BT E6327.pdf
- Description:
- TRANS PNP 45V 0.1A PG-SC75-3D
- Quantity:
- Payment:
- Shipping:
Inventory:4,996
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Product details
Overview
BC857BT E6327 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 = 220–480 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), enabling precision amplification in battery-powered audio preamps.
For engineers reviewing the BC857BT E6327 datasheet, BC857BT E6327 pinout, BC857BT E6327 application, or BC857BT E6327 equivalent, key selection criteria include its AEC-Q101 qualification, SOT23 package compatibility, complementary pairing with BC847B, and verified performance in low-voltage linear amplification and switching at ≤100 mA collector current.
Technical Context
This PNP transistor operates with VCEO = 45 V and VCBO = 50 V, supporting mid-rail biasing in dual-supply analog front-ends. Its fT = 250 MHz ensures stable gain up to audio harmonics beyond 20 kHz while maintaining hFE linearity across IC = 10 µA–100 mA.
The device features low Ccb = 1.5 pF and Ceb = 8 pF, minimizing Miller effect in common-emitter configurations. Thermal resistance RthJS ≤ 240 K/W (SOT23) enables reliable operation at Tj ≤ 150 °C under continuous 100 mA load with proper PCB copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Supports rail-to-rail signal swing in ±15 V or 24 V analog systems without breakdown |
| hFE (IC = 2 mA) | 220–480 - Enables high-gain, low-bias-current amplifier stages with predictable DC operating point |
| VCE(sat) | ≤300 mV @ IC/IB = 10 mA/0.5 mA - Reduces conduction loss and self-heating in active-load switching applications |
| fT | 250 MHz - Ensures flat gain response through third harmonic of 15 kHz audio signals |
| Noise Figure | 1–4 dB @ 1 kHz - Meets low-noise requirements for microphone preamplifiers and sensor interface circuits |
| Ptot | 330 mW @ TS ≤ 71 °C - Allows sustained operation at 100 mA with ≥1 cm² 2-oz copper pad |
Pinout & Package
BC857BT E6327 is housed in a RoHS-compliant SOT23 plastic surface-mount package (JEDEC TO-236AB), with standard pin assignment matching JEITA SC-59 and EIAJ ED-7352AA outlines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to higher potential rail in PNP common-emitter switch or amplifier; defines reference for base drive |
| 2 (Base) | Control input | Receives current-limited bias (typically 1–10% of IC) to set operating point; sensitive to ESD |
| 3 (Collector) | Output current path | Drives load to ground in switching mode or feeds next stage in amplification; requires thermal relief on PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements (HTOL, TC, HTRB), enabling use in infotainment and body control modules |
| Low VCE(sat) | 250–300 mV at rated IC, reducing power dissipation by >40% vs. legacy PNP transistors in 5–12 V logic-level drivers |
| High hFE consistency | Group B (hFE = 220–480) ensures <±15% gain variation across production lots for matched-pair designs |
| Low-noise operation | F = 1 dB typ. @ 1 kHz enables direct coupling in electret microphone bias networks without added filtering |
Applications
| Audio Preamp Stage | LED Driver Circuit |
|---|---|
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors in portable voice recorders. IC Role / Device Role / Timing Role: PNP common-emitter voltage amplifier with emitter-degeneration bias for stable gain and wide bandwidth. Use Value: Achieves SNR > 65 dB using only 2.5 V supply and single-stage design due to low 1–4 dB noise figure. | Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V microcontroller GPIO pins with current limiting. IC Role / Device Role / Timing Role: Low-saturation PNP switch sinking LED anode current to ground in active-low configuration. Use Value: Delivers full brightness with <0.3 V drop across collector-emitter, preserving >90% of available supply headroom. |
| Automotive Door Module | Industrial Sensor Interface |
Use Scenario: Level-shifting and buffering LIN bus wake-up signals in door control units exposed to -40°C to +125°C ambient. IC Role / Device Role / Timing Role: AEC-Q101-qualified PNP buffer isolating MCU I/O from noisy 12 V vehicle battery domain. Use Value: Maintains reliable turn-on at -40°C with hFE ≥ 180 and VCE(sat) ≤ 450 mV, eliminating cold-start failures. | Use Scenario: Converting 4–20 mA loop current into voltage for ADC input in programmable logic controller analog input cards. IC Role / Device Role / Timing Role: Precision PNP current mirror element providing temperature-stable 1:1 current replication. Use Value: Matches hFE across temperature (±5% drift from -25°C to +85°C), ensuring <0.1% full-scale error in current sensing. |
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 |
|---|---|---|---|
| BC847BTA | NPN complement; identical SOT23 footprint but opposite polarity; hFE = 200–450, VCEO = 45 V | Requires circuit topology inversion; unsuitable for direct replacement in PNP-biased topologies | Select when designing complementary push-pull pairs or NPN-based amplifier stages |
| MMBT3906LT1G | Same PNP function; VCEO = 40 V (5 V lower); hFE = 100–300 (lower gain range); RthJS = 277 K/W | Marginally lower voltage rating limits use in 24 V industrial systems; reduced thermal margin at >80 mA | Acceptable for cost-sensitive consumer audio where 40 V rating suffices and thermal load is light |
Compared with BC857BT E6327, BC847BTA serves complementary roles in differential pairs, while MMBT3906LT1G trades 5 V voltage headroom and 20% gain consistency for broader distributor availability-making BC857BT E6327 optimal for AEC-Q101–required or low-noise-critical designs.
Availability
BC857BT E6327 is available at Aetrix Electronics and suitable for automotive infotainment systems, portable audio devices, and industrial sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for BC857BT 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 electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949.
BC857BT E6327 belongs to Infineon's BC856–BC860 family of AEC-Q101-qualified PNP transistors designed specifically for high-reliability analog signal conditioning and discrete power control in automotive and industrial environments.
FAQ
What is the maximum continuous collector current for BC857BT E6327?
The absolute maximum continuous collector current is 100 mA at TS ≤ 71 °C. Derating is required above this temperature: power dissipation drops linearly to 0 mW at 150 °C junction temperature. Operation at 100 mA requires ≥1 cm² of 2-oz copper on the collector pad for thermal management.
Is BC857BT E6327 pin-compatible with BC857B or BC857BW?
Yes - BC857BT E6327 uses the standard SOT23 package with identical pinout (Emitter-Base-Collector on pins 1-2-3) as BC857B and BC857BW. However, BC857BW is in SOT323 (smaller footprint), so PCB land patterns are not interchangeable despite functional equivalence.
Does BC857BT E6327 support pulsed operation beyond its DC ratings?
Yes - it supports peak collector currents up to 200 mA with pulse width ≤300 µs and duty cycle ≤2%, per pulse test conditions. This enables brief overdrive in relay drivers or flash LED strobes without exceeding thermal limits or degrading hFE.
How does the noise performance of BC857BT E6327 compare to BC859C?
BC857BT E6327 has F = 1–4 dB at 1 kHz, while BC859C specifies F = 4 dB max. The BC857 series achieves lower noise via tighter hFE grouping and optimized epitaxial layer doping, making it preferred for microphone preamps where sub-2 dB noise is critical for dynamic range.
BC 857BT E6327 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- SC-75, SOT-416
- 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:
- 220 @ 2mA, 5V
- Power - Max:
- 330 mW
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SC75-3D
BC 857BT E6327 FAQ
1.How can I place an order for BC 857BT E6327 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC 857BT 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 857BT E6327 reliable?
The price and inventory of BC 857BT 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 857BT E6327 is usually 5 days.
3.What payment methods are accepted for BC 857BT E6327?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC 857BT E6327 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC 857BT E6327?
BC 857BT E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC 857BT 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 857BT E6327?
For technical support, including BC 857BT E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC 857BT E6327 requirements.
6.How does Aetrix verify that BC 857BT E6327 is sourced from the original manufacturer or authorized distributors?
All BC 857BT 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 857BT E6327 meets industry standards.
7.What is the process for return or replacement of BC 857BT E6327?
All BC 857BT E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BC 857BT 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 857BT E6327 part is unused and in its original packaging.
Return procedure for BC 857BT E6327:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC 857BT E6327 Tags
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