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Nexperia USA Inc. BC856W-QF
- Part No.:
- BC856W-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC856W-QF.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:5,782
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Product details
Overview
BC856W-Q from Nexperia is a PNP general-purpose bipolar junction transistor (BJT) in SOT323 (SC-70) surface-mount package, rated for −65 V VCEO, −100 mA IC, and DC current gain (hFE) of 125–475 at VCE = −5 V and IC = −2 mA. It serves as a low-power switching or linear amplification device in automotive signal conditioning, sensor interface, and LED driver stages.
For engineers reviewing the BC856W-Q datasheet, BC856W-Q pinout, BC856W-Q application, or BC856W-Q equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (625 K/W), saturation voltage (−250 mV typical at IC = −100 mA), and validated automotive-grade reliability data - all critical for board-level validation and BOM selection.
Technical Context
This PNP transistor operates with base-emitter forward bias enabling controlled collector current flow up to −100 mA, supporting both active-mode amplification and saturated-switching operation. Its −65 V collector-emitter breakdown voltage and −80 V collector-base rating suit medium-voltage logic-level interfacing and load switching in 12 V/24 V automotive subsystems.
The device exhibits hFE variation across temperature (−55 °C to +150 °C) and collector current, with typical VBE(sat) of −850 mV at IC = −100 mA / IB = −5 mA, and transition frequency fT ≥ 100 MHz - confirming suitability for low-frequency analog and digital switching, not RF signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V: Maximum safe collector-emitter voltage under open-base condition; defines upper rail compatibility in 48 V automotive circuits. |
| IC | −100 mA: Continuous DC collector current limit; supports driving small relays, LEDs, or logic inputs without external heat sinking. |
| hFE | 125–475 @ VCE = −5 V, IC = −2 mA: Current amplification range enabling predictable base drive design for stable switching thresholds. |
| VCE(sat) | −250 mV (typ) @ IC = −100 mA, IB = −5 mA: Low saturation voltage minimizes power loss and self-heating during on-state operation. |
| Rth(j-a) | 625 K/W: Junction-to-ambient thermal resistance on FR4 PCB; informs derating requirements above +25 °C ambient. |
| AEC-Q101 | Qualified: Meets stress-test requirements for automotive discrete semiconductors, including temperature cycling, HTRB, and ESD. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, 3-lead configuration optimized for high-density PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires −0.7 V relative to emitter to initiate conduction; base current must be sized per hFE and load current. |
| 2 | Emitter (E) | Current source terminal; connected to higher potential rail in PNP switch configurations; sets reference for VBE and VCE. |
| 3 | Collector (C) | Output terminal; sinks current from load to emitter; voltage swing limited by VCEO and thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and cabin applications per stress-test standard, eliminating need for additional qualification effort. |
| Low saturation voltage | VCE(sat) ≤ −600 mV ensures <15 mW power loss at full rated current, reducing thermal stress in compact modules. |
| High hFE consistency | 125–475 range enables robust base resistor design across production lots without trimming or feedback compensation. |
| Small-outline packaging | SOT323 footprint saves >60% board area vs. SOT23, supporting miniaturized ECUs and ADAS sensor nodes. |
Applications
| Automotive Door Module Switching | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Controlling window lift motor enable lines and mirror fold/unfold solenoids in door control units. IC Role / Device Role / Timing Role: PNP switch sourcing current to 12 V loads via emitter-follower configuration; handles transient surges up to 200 mA peak. 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 thermistor or potentiometer outputs into clean 0–5 V analog signals for microcontroller ADC input. IC Role / Device Role / Timing Role: Linear-mode PNP amplifier with fixed emitter degeneration resistor; provides stable gain and offset rejection. Use Value: hFE stability over −40 °C to +125 °C maintains calibration accuracy; low noise figure (≤10 dB) preserves signal integrity. |
| LED Status Indicator Driver | Power Supply Enable Control |
|
Use Scenario: Driving multiple panel-mounted status LEDs in infotainment head units and instrument clusters. IC Role / Device Role / Timing Role: Saturated PNP switch sinking LED current through collector; base driven by MCU GPIO with current-limiting resistor. Use Value: −250 mV VCE(sat) ensures >95% LED forward voltage utilization; 100 mA rating supports parallel LED strings. |
Use Scenario: Enabling/disabling secondary 3.3 V LDO rails in telematics modules based on ignition state or sleep-wake commands. IC Role / Device Role / Timing Role: High-side enable switch controlling LDO input; base driven by low-current wake-up controller output. Use Value: −5 V VEBO rating prevents reverse-bias damage during hot-swap events; 200 mW Ptot allows continuous operation at 10 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 |
|---|---|---|---|
| BC857W-Q | VCEO = −45 V, hFE = 125–800; otherwise identical SOT323 package and AEC-Q101 qualification. | Lower voltage rating restricts use to 24 V systems; higher hFE reduces required base drive but increases sensitivity to leakage. | Select when operating below −45 V and higher current gain improves GPIO drive margin in low-power MCUs. |
| BC846W-Q | NPN complement; same package, voltage/current ratings, and AEC-Q101 qualification; pinout differs (1=C, 2=B, 3=E). | Requires inverted logic and reversed supply polarity; suitable where NPN topology simplifies existing schematic layout. | Choose only if circuit architecture mandates NPN configuration; verify pinout compatibility before PCB integration. |
Compared with BC856W-Q, BC857W-Q trades voltage headroom for wider hFE range in identical automotive-qualified packaging, while BC846W-Q offers functional symmetry in NPN form but demands schematic-level topology changes and pinout adaptation.
Availability
BC856W-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer LED lighting systems requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for BC856W-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-enhancing components, delivering high-volume, high-reliability discrete and logic devices for automotive, industrial, and mobile markets.
BC856W-Q belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for cost-sensitive, space-constrained automotive subsystems requiring proven robustness and consistent parametric performance.
FAQ
Is BC856W-Q suitable for high-frequency switching applications?
No. While its fT is ≥100 MHz, BC856W-Q is characterized and qualified for general-purpose switching and amplification up to ~100 kHz. Its storage time and fall time are not optimized for MHz-range PWM; use dedicated RF or fast-switching transistors for such applications.
What is the maximum allowable PCB temperature rise during continuous operation?
At ambient 25 °C and 100 mA IC, junction temperature reaches ~110 °C using Rth(j-a) = 625 K/W. To stay within 150 °C Tj(max), ambient must remain ≤65 °C - meaning PCB local temperature rise should be limited to ≤40 °C above ambient with standard FR4 mounting.
Does BC856W-Q require external base resistors in switching configurations?
Yes. Base current must be calculated using hFE(min) = 125 and worst-case VBE ≈ −0.75 V. For 100 mA collector current, minimum IB = 0.8 mA; a 4.7 kΩ resistor from 3.3 V MCU GPIO yields ~0.5 mA - insufficient. Use ≤2.2 kΩ for guaranteed saturation.
Can BC856W-Q replace BC856B in non-automotive designs?
Yes, electrically - BC856W-Q matches BC856B's VCEO, IC, and hFE specs - but adds AEC-Q101 qualification, tighter parametric screening, and automotive-grade traceability. In commercial applications, it offers enhanced reliability at minimal cost premium; no redesign needed.
BC856W-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
BC856W-QF FAQ
1.How can I place an order for BC856W-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856W-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 BC856W-QF reliable?
The price and inventory of BC856W-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856W-QF is usually 5 days.
3.What payment methods are accepted for BC856W-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856W-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856W-QF?
BC856W-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856W-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 BC856W-QF?
For technical support, including BC856W-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856W-QF requirements.
6.How does Aetrix verify that BC856W-QF is sourced from the original manufacturer or authorized distributors?
All BC856W-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 BC856W-QF meets industry standards.
7.What is the process for return or replacement of BC856W-QF?
All BC856W-QF units undergo pre-shipment inspection (PSI). If there is an issue with BC856W-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 BC856W-QF part is unused and in its original packaging.
Return procedure for BC856W-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856W-QF Tags
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Nexperia USA Inc.
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