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Nexperia USA Inc. BC856BW-QF
- Part No.:
- BC856BW-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC856BW-QF.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:8,965
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Product details
Overview
BC856BW-QF from Nexperia is a PNP general-purpose transistor in SOT323 (SC-70) package, rated for −65 V VCEO, −100 mA IC, and DC current gain (hFE) of 220–475 at VCE = −5 V, IC = −2 mA. It serves as a low-power switching or linear amplification device in automotive signal conditioning, sensor interface, and power rail control circuits.
For engineers reviewing the BC856BW-QF datasheet, BC856BW-QF pinout, BC856BW-QF application, or BC856BW-QF equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (625 K/W), saturation voltage (−250 mV typ. at IC = −100 mA), and SC-70 footprint compatibility - all critical for automotive-grade PCB layout and reliability validation.
Technical Context
This PNP bipolar junction transistor operates with open-base collector-emitter breakdown voltage of −65 V and emitter-base breakdown voltage of −5 V, supporting robust operation in low-voltage automotive domains. Its hFE range (220–475) ensures stable current amplification across −55 °C to +150 °C ambient conditions.
Designed for surface-mount assembly on FR4 PCBs with standard 35 µm copper, it delivers 200 mW total power dissipation at Tamb ≤ 25 °C and exhibits 3 pF collector capacitance at VCB = −10 V, enabling use in low-frequency switching (<100 MHz fT) and analog bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V: Maximum safe collector-emitter voltage before breakdown; enables use in 48 V automotive subsystems and industrial 24 V rails. |
| IC | −100 mA continuous: Supports load switching up to ~100 mA without derating at 25 °C; suitable for LED drivers and logic-level translators. |
| hFE | 220–475 at VCE = −5 V, IC = −2 mA: Ensures predictable base drive requirements for reliable saturation in digital switching applications. |
| VCE(sat) | −250 mV max at IC = −100 mA, IB = −5 mA: Minimizes conduction loss and self-heating in high-duty-cycle on-state operation. |
| Rth(j-a) | 625 K/W: Thermal resistance from junction to ambient on standard FR4 PCB; informs thermal margin for sustained 100 mA operation. |
| fT | 100 MHz: Transition frequency confirms suitability for audio-frequency amplification and sub-MHz digital signal routing. |
| AEC-Q101 | Qualified: Meets stress test requirements for discrete semiconductors in automotive applications; supports PPAP documentation. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 1.8 mm × 0.9 mm body, 0.65 mm lead pitch, 3-terminal configuration optimized for high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires ≤ −5 mA drive for full saturation at −100 mA collector load. |
| 2 | Emitter (E) | Common reference terminal for PNP topology; connected to higher-potential rail (e.g., battery or regulated supply). |
| 3 | Collector (C) | Output current sink node; delivers up to −100 mA to grounded or lower-potential loads (e.g., sensors, LEDs, MOSFET gates). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and cabin environments per stress test protocol; eliminates need for additional qualification effort. |
| Low VCE(sat) | −250 mV typical at IC = −100 mA reduces power loss and thermal rise in always-on or duty-cycled circuits. |
| Wide hFE range | 220–475 enables consistent switching behavior across production lots without binning or trim compensation. |
| Small SOT323 footprint | 1.3 × 1.8 mm outline saves board space in multi-channel sensor modules and ECU signal conditioning sections. |
| High Tj rating | 150 °C maximum junction temperature supports operation near heat sources (e.g., power converters, motor drivers). |
Applications
| Automotive Door Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Driving window lift motor enable signals and mirror position feedback switches in door control units. IC Role / Device Role / Timing Role: PNP switch controlling 12 V/24 V load activation via microcontroller GPIO with inverted logic level. Use Value: −65 V VCEO withstands load dump transients; AEC-Q101 compliance ensures field reliability over 15-year vehicle lifetime. |
Use Scenario: Level-shifting and buffering analog outputs from temperature/humidity sensors to ADC inputs in PLC I/O modules. IC Role / Device Role / Timing Role: Linear amplifier stage providing current gain and isolation between sensor output and measurement circuitry. Use Value: 220–475 hFE ensures stable gain across temperature; 3 pF Cc prevents high-frequency noise coupling into precision analog paths. |
| LED Status Indicator | Power Rail Sequencing |
Use Scenario: Driving discrete red/green status LEDs on dashboard displays and infotainment panels. IC Role / Device Role / Timing Role: Low-side current sink (emitter-follower configured) for precise LED brightness control via PWM. Use Value: −250 mV VCE(sat) minimizes voltage drop across transistor, preserving forward voltage margin for LED string design. |
Use Scenario: Enabling/disabling auxiliary 3.3 V or 5 V rails in ADAS camera modules based on main SoC power state. IC Role / Device Role / Timing Role: High-side switch (with external pull-up) managing controlled power-up/down sequencing of downstream ICs. Use Value: −100 mA IC rating supports typical rail currents; 625 K/W Rth(j-a) allows thermal-safe operation without heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857BW-Q | VCEO = −45 V (vs. −65 V); otherwise identical hFE, package, and AEC-Q101 status. | Not suitable for 48 V systems or high-transient automotive domains requiring −65 V rating. | Select only when operating voltage remains ≤ −40 V and cost optimization is prioritized. |
| BC846BW-Q | NPN complement; same hFE range and SOT323 package but opposite polarity and VCEO = +65 V. | Requires circuit redesign (e.g., high-side vs. low-side switching, inverted logic handling). | Choose only when NPN topology matches existing schematic architecture and biasing scheme. |
Compared with BC857BW-Q, BC856BW-Q provides 20 V higher collector-emitter blocking capability critical for 48 V architectures; versus BC846BW-Q, it avoids polarity inversion and preserves existing PNP-based control logic without layout or firmware changes.
Availability
BC856BW-QF is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, LED status indicators, and power rail sequencing circuits requiring stable component supply, AEC-Q101 traceability, and SOT323 footprint consistency.
Supply support for BC856BW-QF 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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.
BC856BW-QF belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered specifically for robust, space-constrained automotive signal switching and amplification where reliability and thermal stability are non-negotiable.
FAQ
Is BC856BW-QF pin-compatible with BC856B?
Yes - BC856BW-QF uses the same SOT323 (SC-70) package and identical 1–2–3 pinout (Base–Emitter–Collector) as non-automotive BC856B variants. Mechanical and electrical pin mapping is fully interchangeable, though BC856BW-QF adds AEC-Q101 qualification and tighter process controls.
What is the maximum allowable base current for continuous operation?
The peak base current (IBM) is rated at −200 mA, but for continuous DC operation, base current must be limited to ensure junction temperature stays within 150 °C. At IC = −100 mA and hFE ≥ 220, recommended IB is ≤ −0.45 mA - well below the absolute maximum to guarantee long-term reliability.
Can BC856BW-QF replace BC857BW-Q in an existing design?
Only if the circuit operates below −45 V collector-emitter voltage. BC856BW-QF offers −65 V VCEO versus −45 V for BC857BW-Q, so substitution is safe in lower-voltage applications but unnecessary in most cases - both share identical hFE, package, and thermal specs.
Does BC856BW-QF require special PCB layout considerations for thermal performance?
Yes - its 625 K/W Rth(j-a) assumes mounting on standard FR4 with single-sided 35 µm copper and tin-plated pads. To maintain thermal margin at full −100 mA, avoid excessive copper removal around pins 1–3 and ensure solder mask defined pads per Nexperia's SOT323 reflow footprint (2.65 × 2.35 mm land pattern).
BC856BW-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 65 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 125 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC856BW-QF FAQ
1.How can I place an order for BC856BW-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856BW-QF 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 BC856BW-QF reliable?
The price and inventory of BC856BW-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856BW-QF is usually 5 days.
3.What payment methods are accepted for BC856BW-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856BW-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856BW-QF?
BC856BW-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856BW-QF 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 BC856BW-QF?
For technical support, including BC856BW-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856BW-QF requirements.
6.How does Aetrix verify that BC856BW-QF is sourced from the original manufacturer or authorized distributors?
All BC856BW-QF 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 BC856BW-QF meets industry standards.
7.What is the process for return or replacement of BC856BW-QF?
All BC856BW-QF units undergo pre-shipment inspection (PSI). If there is an issue with BC856BW-QF, 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 BC856BW-QF part is unused and in its original packaging.
Return procedure for BC856BW-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856BW-QF Tags
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