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Nexperia USA Inc. BC856BW-QX
- Part No.:
- BC856BW-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC856BW-QX.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
BC856BW-Q 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 management circuits.
For engineers reviewing the BC856BW-Q datasheet, BC856BW-Q pinout, BC856BW-Q application, or BC856BW-Q equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (625 K/W), saturation voltage behavior (VCE(sat) ≤ −600 mV at IC = −100 mA), and precise SC-70 footprint data - 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 biasing in negative-rail signal paths. Its hFE range (220–475) ensures predictable current amplification across −2 mA to −10 mA collector currents at 25 °C ambient.
Thermal performance is defined by Rth(j-a) = 625 K/W on FR4 PCB (single-sided, 35 µm Cu), and it sustains continuous operation up to Tj = 150 °C. The device exhibits VCE(sat) ≤ −250 mV at IC = −10 mA / IB = −0.5 mA, enabling low-loss switching in battery-powered control nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V: Maximum safe collector-emitter voltage under open-base condition; enables use in 48 V automotive subsystems with margin. |
| IC | −100 mA: Continuous DC collector current rating; supports medium-gain switching in LED drivers or logic-level translators. |
| hFE | 220–475 @ VCE = −5 V, IC = −2 mA: Confirmed DC current gain range ensuring stable bias design across production lots. |
| VCE(sat) | ≤ −600 mV @ IC = −100 mA, IB = −5 mA: Low saturation voltage minimizes conduction loss in high-duty-cycle switch applications. |
| Rth(j-a) | 625 K/W: Junction-to-ambient thermal resistance on standard FR4 PCB; informs derating curves for sustained 100 mA operation. |
| AEC-Q101 | Qualified: Meets stress test requirements for discrete semiconductors in automotive environments per AEC standard. |
| Package | SOT323 (SC-70): 1.3 × 2.2 mm surface-mount outline with 0.65 mm lead pitch; compatible with high-density reflow assembly. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads; dimensions 1.3 mm × 2.2 mm × 0.95 mm (max height), 0.65 mm lead pitch, and standard FR4-compatible solder footprint per Figure 15.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal for forward-biased PNP operation; requires negative base current relative to emitter to enable conduction. |
| 2 | Emitter (E) | Current source terminal in PNP configuration; connected to higher potential rail (e.g., battery +) in high-side switch layouts. |
| 3 | Collector (C) | Current sink terminal; routed to load or lower-potential node; polarity must respect −VCE and −IC conventions. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature range (−40 °C to +150 °C) and mechanical stress; eliminates need for additional qualification testing. |
| Low VCE(sat) | −250 mV typical at IC = −10 mA, enabling <1% voltage drop in 24 V control circuits with minimal self-heating. |
| High hFE consistency | 220–475 range tightly specified at −2 mA collector current; reduces base drive circuit variability in production designs. |
| SC-70 footprint | 0.65 mm lead pitch and 1.3 × 2.2 mm body allow placement in space-constrained modules such as ECUs and body control units. |
Applications
| Automotive Door Module Switching | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Driving resistive loads (e.g., window motor relays, mirror heater controls) in door control units using 12 V/24 V rails. IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow from battery to load; operates in saturation mode with <1 µs turn-off delay. Use Value: −65 V VCEO withstands load-dump transients; AEC-Q101 qualification ensures 15-year field reliability in vibration-prone environments. |
Use Scenario: Amplifying low-level analog outputs (e.g., thermistor bridges, pressure sensor Wheatstone networks) before ADC sampling. IC Role / Device Role / Timing Role: Linear-mode PNP amplifier providing fixed-gain signal boosting with minimal offset drift over −40 °C to +125 °C. Use Value: Stable hFE (220–475) and low noise figure (2–10 dB) preserve SNR in millivolt-range sensor signals without active compensation. |
| LED Status Indicator Driver | Power Supply Enable Control |
|
Use Scenario: Sinking current for multi-color status LEDs in instrument clusters or infotainment panels requiring dimming via PWM. IC Role / Device Role / Timing Role: Low-current PNP switch operating at 20 kHz PWM frequency; handles −100 mA peak pulses with <50 ns fall time. Use Value: VCE(sat) ≤ −600 mV at −100 mA limits power dissipation to <6 mW per LED channel, eliminating heatsinking. |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., CAN transceiver VIO, MCU backup domain) based on microcontroller GPIO. IC Role / Device Role / Timing Role: Logic-level translator and current amplifier converting 3.3 V CMOS output into −100 mA capable enable signal. Use Value: −5 V VEBO rating allows direct connection to 3.3 V logic without level-shifting; hFE ≥ 220 ensures full saturation with <1 mA base drive. |
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); identical hFE (220–475), package, and AEC-Q101 status | Not suitable for 48 V systems or load-dump tolerant designs requiring >−50 V rating | Select when operating voltage stays below 36 V and cost optimization is prioritized over voltage headroom. |
| BC846BW-Q | NPN complement; same hFE, package, and AEC-Q101 rating but opposite polarity and VCEO = +65 V | Requires inverted schematic topology (low-side vs. high-side switching); incompatible with existing PNP bias networks | Choose only when redesigning for NPN-based current sinking or when leveraging existing NPN reference designs. |
Compared with BC857BW-Q, BC856BW-Q provides 20 V higher collector-emitter breakdown margin critical for 48 V automotive architectures; versus BC846BW-Q, it preserves high-side switch functionality and avoids board-level polarity rework while maintaining identical thermal and gain performance.
Availability
BC856BW-Q is available at Aetrix Electronics and suitable for automotive ECU development, industrial sensor interface modules, and LED driver designs requiring stable component supply, AEC-Q101 compliance, and SC-70 footprint compatibility.
Supply support for BC856BW-Q 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, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BC856BW-Q belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for robust, space-efficient switching and amplification in harsh-environment automotive electronics.
FAQ
Is BC856BW-Q suitable for high-frequency switching above 10 MHz?
No. BC856BW-Q has a transition frequency fT of 100 MHz only at IC = −10 mA and VCE = −5 V; its usable switching bandwidth is limited to ≤1 MHz in practical saturated-switch applications due to minority-carrier storage time and lack of optimized RF structure.
What is the maximum allowable base current for continuous operation?
The absolute maximum peak base current IBM is −200 mA, but continuous base current must be limited to ensure junction temperature remains ≤150 °C. At IC = −100 mA and hFE = 220, recommended IB is −455 µA minimum; practical design uses −1 to −5 mA for safety margin and fast turn-off.
Does BC856BW-Q require external protection against ESD in automotive harness interfaces?
Yes. While AEC-Q101 qualified for automotive stress, BC856BW-Q lacks integrated ESD protection diodes. When used in connector-facing circuits (e.g., LIN bus pull-ups), external TVS diodes rated for ±30 kV HBM must be added to prevent gate oxide damage during hot-plug events.
Can BC856BW-Q replace BC856B in non-automotive designs?
Yes, with qualification. BC856BW-Q shares identical electrical specs and SOT323 package with BC856B but adds AEC-Q101 qualification, tighter hFE binning (220–475 vs. 125–475), and enhanced process controls. No schematic or layout changes are needed, though automotive-grade traceability documentation applies.
BC856BW-QX 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-QX FAQ
1.How can I place an order for BC856BW-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856BW-QX 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-QX reliable?
The price and inventory of BC856BW-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856BW-QX is usually 5 days.
3.What payment methods are accepted for BC856BW-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856BW-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856BW-QX?
BC856BW-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856BW-QX 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-QX?
For technical support, including BC856BW-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856BW-QX requirements.
6.How does Aetrix verify that BC856BW-QX is sourced from the original manufacturer or authorized distributors?
All BC856BW-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BC856BW-QX?
All BC856BW-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC856BW-QX, 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-QX part is unused and in its original packaging.
Return procedure for BC856BW-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856BW-QX Tags
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