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Nexperia USA Inc. BC856AW-QF
- Part No.:
- BC856AW-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC856AW-QF.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:8,709
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Product details
Overview
BC856AW-QF from Nexperia is a PNP general-purpose bipolar junction transistor in SOT323 (SC-70) package, rated for −65 V VCEO, −100 mA IC, and DC current gain (hFE) of 125–250 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 BC856AW-QF datasheet, BC856AW-QF pinout, BC856AW-QF application, or BC856AW-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 BJT operates with emitter-grounded configuration and supports linear amplification up to 100 MHz fT. Its base-emitter saturation voltage is −850 mV max at IC = −100 mA / IB = −5 mA, and collector-emitter saturation voltage is −250 mV typ. under same conditions.
The device features guaranteed hFE range of 125–250, enabling predictable biasing in discrete amplifier stages or digital logic-level translation. Thermal resistance Rth(j-a) is 625 K/W on FR4 PCB, defining its derating envelope for ambient temperatures from −65 °C to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V - Maximum allowable collector-emitter voltage before breakdown; defines safe operating range in automotive 12 V/24 V supply rails with transients. |
| IC | −100 mA - Continuous collector current rating; suitable for driving LEDs, small relays, or logic-level translators without heatsinking. |
| hFE | 125–250 - DC current gain at VCE = −5 V, IC = −2 mA; enables stable bias design for Class-A amplifiers or saturated switches. |
| VCE(sat) | −250 mV typ. at IC = −100 mA, IB = −5 mA - Low saturation voltage minimizes power loss and heating in switching applications. |
| Rth(j-a) | 625 K/W - Junction-to-ambient thermal resistance on standard FR4 PCB; determines maximum power dissipation (200 mW) at Tamb ≤ 25 °C. |
| fT | 100 MHz - Transition frequency at VCE = −5 V, IC = −10 mA; supports audio-frequency amplification and fast digital switching. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 1.8 mm footprint, 0.95 mm height, 3-lead configuration with gull-wing terminations for reflow soldering.
| 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 | Emiter (E) | Current source terminal in PNP topology; connected to higher potential (e.g., VCC) in common-emitter configurations. |
| 3 | Collector (C) | Current sink terminal; output node for switched load or amplified signal path; reverse-biased during cutoff. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Qualified per Automotive Electronics Council stress test standard; validated for under-hood temperature cycling, humidity, and mechanical shock. |
| Low VCE(sat) | −250 mV typical at full rated current ensures <10 mW conduction loss in 100 mA switching loads. |
| High hFE consistency | 125–250 range enables single-resistor bias networks without trimming in production designs. |
| Small-footprint SOT323 | 1.3 × 1.8 mm outline reduces PCB area by >40% vs. SOT23; compatible with high-density automotive control modules. |
Applications
| Automotive Door Module Switching | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving window lift motor control logic and LED status indicators in door control units. IC Role / Device Role / Timing Role: PNP switch controlling 12 V loads with TTL/CMOS-compatible base drive. Use Value: −65 V VCEO withstands load-dump transients; −250 mV VCE(sat) limits self-heating during continuous duty cycles. |
Use Scenario: Amplifying low-level analog outputs from NTC thermistors or Hall-effect sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Discrete Class-A amplifier stage with fixed emitter bias and collector-loaded output. Use Value: 125–250 hFE ensures stable gain across temperature; 100 MHz fT preserves signal integrity up to 10 kHz bandwidth. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Equipment Biasing |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., display backlight, fan control) in smart home appliances. IC Role / Device Role / Timing Role: Low-side PNP switch activated by microcontroller GPIO with inverted logic. Use Value: −100 mA IC rating matches typical backlight LED string current; SOT323 footprint fits space-constrained front-panel PCBs. |
Use Scenario: Providing precise bias current to op-amp input stages or photodiode transimpedance amplifiers in portable diagnostics. IC Role / Device Role / Timing Role: Current source/sink element in precision analog front-end circuitry. Use Value: Low ICBO (<−4 µA at 150 °C) prevents drift in high-impedance nodes; AEC-Q101 qualification supports extended field-reliability requirements. |
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 |
|---|---|---|---|
| BC856BW-Q | hFE = 220–475; higher gain spread but same VCEO/IC ratings | Better suited for low-base-drive amplification; less predictable in saturated switching due to wider hFE tolerance | Select when gain stability is secondary to higher average current gain in linear stages. |
| BC857AW-Q | VCEO = −45 V (vs. −65 V); otherwise identical package, pinout, and hFE range | Not suitable for 24 V automotive systems with load-dump protection; acceptable in 12 V-only or industrial 24 V regulated supplies | Choose only if system maximum transient voltage stays below −45 V; verify against ISO 7637-2 pulse 5a. |
Compared with BC856BW-Q and BC857AW-Q, BC856AW-Q offers the highest voltage margin (−65 V) within its gain class, making it the preferred choice for unregulated automotive battery interfaces where transient immunity is non-negotiable.
Availability
BC856AW-QF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal chains, and consumer appliance power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BC856AW-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
BC856AW-QF belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered for robustness in automotive signal switching and amplification where space, thermal performance, and transient resilience are critical.
FAQ
What is the maximum allowable junction temperature for BC856AW-QF?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in the Limiting Values table. Operation above this threshold risks permanent degradation of hFE and increased leakage currents. Derating is required above 25 °C ambient based on Rth(j-a) = 625 K/W and Ptot = 200 mW.
Is BC856AW-QF pin-compatible with BC846AW-Q?
Yes - both share identical SOT323 (SC-70) package and pinout (1: Base, 2: Emitter, 3: Collector). However, BC846AW-Q is its NPN complement with opposite polarity, requiring circuit-level inversion of bias and signal paths.
Does BC856AW-QF support wave soldering?
Yes - Nexperia provides dedicated wave soldering footprint data (Fig. 16) with recommended solder land dimensions (3.65 × 2.1 mm), solder resist openings (2.575 × 1.8 mm), and preferred transport direction. Peak temperature must not exceed 260 °C for ≤10 s.
What is the emitter-base breakdown voltage (V(BR)EBO) specification?
V(BR)EBO is −5 V minimum, measured with IC = 0 A and IE = −100 µA. This defines the maximum reverse voltage allowable across base-emitter junction before avalanche conduction begins - critical for protecting against ESD or miswired base drive.
BC856AW-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
BC856AW-QF FAQ
1.How can I place an order for BC856AW-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856AW-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 BC856AW-QF reliable?
The price and inventory of BC856AW-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856AW-QF is usually 5 days.
3.What payment methods are accepted for BC856AW-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856AW-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856AW-QF?
BC856AW-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856AW-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 BC856AW-QF?
For technical support, including BC856AW-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856AW-QF requirements.
6.How does Aetrix verify that BC856AW-QF is sourced from the original manufacturer or authorized distributors?
All BC856AW-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 BC856AW-QF meets industry standards.
7.What is the process for return or replacement of BC856AW-QF?
All BC856AW-QF units undergo pre-shipment inspection (PSI). If there is an issue with BC856AW-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 BC856AW-QF part is unused and in its original packaging.
Return procedure for BC856AW-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856AW-QF Tags
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