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Diodes Incorporated BC856AQ-7-F
- Part No.:
- BC856AQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC856AQ-7-F.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,224
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Product details
Overview
BC856AQ-7-F from Diodes Incorporated is a PNP small-signal transistor in SOT23 package, rated for VCEO = −65 V, IC = −100 mA, and hFE = 125–250 at −2 mA/−5 V, optimized for automotive-grade switching and audio-frequency amplification in space-constrained PCBs.
For engineers reviewing the BC856AQ-7-F datasheet, BC856AQ-7-F pinout, BC856AQ-7-F application, or BC856AQ-7-F equivalent, key selection criteria include guaranteed AEC-Q101 qualification, −65 V VCEO rating, low VCE(sat) (−75 mV typ. @ −10 mA/−0.5 mA), 100 MHz fT, and SOT23 thermal performance (RθJA = 403 °C/W on minimal pad).
Technical Context
This PNP bipolar junction transistor operates with fixed-base current control in linear or saturated switching modes, supporting DC biasing and small-signal amplification up to 200 MHz fT. Its complementary NPN pairing with BC846–BC848 families enables matched push-pull designs.
Designed for automotive applications, it meets AEC-Q101 stress testing, is PPAP-capable, and manufactured in IATF 16949-certified facilities. The device features halogen- and antimony-free "Green" molding compound (UL 94V-0) and matte tin-plated leads compliant with MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V: Maximum collector-emitter voltage before breakdown under open-base conditions; supports robust operation in 48 V automotive supply rails. |
| IC | −100 mA continuous: Safe steady-state collector current handling; sufficient for driving relays, LEDs, or logic-level interfaces. |
| hFE | 125–250 @ −2 mA/−5 V: Predictable DC current gain range enabling stable bias design without excessive base drive overhead. |
| VCE(sat) | −75 mV typ. @ −10 mA/−0.5 mA: Low saturation voltage minimizes power loss and heat generation in switching applications. |
| fT | 100 MHz min.: Enables reliable amplification and signal conditioning up to AF and low-RF frequencies. |
| PD | 310 mW @ 25°C on minimal FR-4 pad: Power dissipation limit defining thermal layout requirements for reliable operation. |
| ESD HBM | 4,000 V: Robust electrostatic discharge immunity simplifies handling and assembly in automated production lines. |
Pinout & Package
Package: SOT23 - surface-mount plastic package with 3-pin configuration, 0.008 g mass, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal for PNP operation | Connected to higher potential rail; defines current flow direction and bias polarity in amplifier or switch topologies. |
| 2 (Base) | Control input for minority-carrier injection | Receives forward-biased current to modulate collector current; requires series resistor for stable biasing. |
| 3 (Collector) | Current sink terminal | Typically tied to load and ground return path; voltage swing capability defined by VCEO and safe operating area. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature cycling, humidity, and mechanical stress-enables use in engine control, body electronics, and ADAS modules without additional qualification. |
| SOT23 footprint compatibility | Standardized 3-pin SOT23 outline (2.9 mm × 1.3 mm × 1.0 mm) ensures drop-in replacement and compatibility with high-speed pick-and-place equipment. |
| "Green" halogen/antimony-free | Meets RoHS 3 (2015/863/EU) with Br+Cl <1500 ppm and Sb <1000 ppm-supports eco-compliance for global OEM programs. |
| Low VCE(sat) at high IC | −250 mV max. @ −100 mA/−5 mA enables efficient switching in power management blocks where conduction loss must be minimized. |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving LED status indicators and small solenoids in door module PCBs with 12 V nominal supply. IC Role / Device Role / Timing Role: PNP switch controlling current sink path to ground; configured in common-emitter topology with base driven by MCU GPIO. Use Value: −65 V VCEO withstands load-dump transients; AEC-Q101 qualification ensures reliability across −40°C to +125°C ambient. | Use Scenario: Amplifying low-level thermistor or bridge sensor outputs in programmable logic controller (PLC) analog input stages. IC Role / Device Role / Timing Role: Small-signal PNP amplifier in emitter-follower configuration to buffer high-impedance sensor nodes. Use Value: hFE = 125–250 ensures predictable gain stability; 2 nA ICBO at 25°C preserves accuracy in µA-level bias networks. |
| Consumer Audio Preamp Stage | Medical Wearable Power Switching |
Use Scenario: Low-noise preamplifier stage in portable headphone amplifiers using dual-supply ±5 V rails. IC Role / Device Role / Timing Role: Linear-mode PNP amplifier biased at −2 mA for optimal NF = 2 dB @ 1 kHz and RS = 2 kΩ. Use Value: 2 dB noise figure enables clean signal amplification; fT = 100 MHz supports wideband audio fidelity without phase distortion. | Use Scenario: Enabling/disabling power to RF transceiver and sensor subsystems in battery-powered ECG patches. IC Role / Device Role / Timing Role: High-reliability load switch controlled by ultra-low-power microcontroller with <1 µA sleep leakage. Use Value: −15 nA ICBO at 25°C prevents standby current drain; SOT23 size fits tight 10 mm × 10 mm wearable PCB real estate. |
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 |
|---|---|---|---|
| BC856BQ-7-F | Higher hFE (220–475 vs. 125–250); identical VCEO, VCE(sat), and package | Better suited for low-base-drive amplification; less margin for gain variation in switching | Select when tighter hFE tolerance or higher gain is required; verify base resistor values for saturation. |
| MMBT856 | Same electrical specs but non-AEC-Q101; JEDEC-standard marking (no automotive traceability) | Limited to commercial/industrial use; no PPAP documentation or IATF 16949 manufacturing evidence | Choose only for cost-sensitive non-automotive designs where qualification and change control are not mandated. |
Compared with BC856BQ-7-F and MMBT856, BC856AQ-7-F provides the optimal balance of guaranteed automotive qualification, moderate hFE consistency, and proven thermal performance in SOT23-making it preferred for safety-critical or long-lifecycle automotive modules.
Availability
BC856AQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, consumer audio preamps, and medical wearable power switching requiring stable component supply across extended product lifecycles.
Supply support for BC856AQ-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BC856AQ-7-F belongs to Diodes' AEC-Q101-qualified small-signal transistor family, engineered specifically for automotive and industrial applications demanding high reliability, consistent parametric performance, and full regulatory compliance.
FAQ
What is the maximum operating temperature for BC856AQ-7-F?
The BC856AQ-7-F has an operating junction temperature range of −65°C to +150°C, verified per AEC-Q101 test conditions. Its thermal resistance RθJA is 403°C/W on minimum recommended pad layout, meaning sustained operation above +125°C ambient requires careful PCB copper area design and derating per Figure 2 in DS42395.
Is BC856AQ-7-F pin-compatible with BC847BQ?
No-BC856AQ-7-F is a PNP transistor while BC847BQ is its complementary NPN counterpart; both share identical SOT23 pinout (E-B-C), but polarity reversal means direct substitution would invert circuit function. They are designed for paired use in push-pull or differential configurations, not interchange.
Does BC856AQ-7-F support lead-free reflow soldering?
Yes-BC856AQ-7-F uses matte tin-plated leads fully compliant with lead-free reflow profiles per JEDEC J-STD-020. Its moisture sensitivity level is 1, eliminating bake requirements prior to assembly. The "Green" molding compound is UL 94V-0 rated and compatible with standard Pb-free SAC305 soldering cycles.
How does BC856AQ-7-F differ from BC856A in marking or specification?
BC856AQ-7-F denotes the AEC-Q101-qualified, tape-and-reel packaged version (3,000 pcs/reel, 8 mm tape width) with K3A top-side marking. Electrically identical to BC856A, it adds automotive-specific traceability, PPAP documentation, and IATF 16949 manufacturing evidence-critical for Tier 1 automotive BOMs where qualification history is auditable.
BC856AQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- 650mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 125 @ 2mA, 5V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BC856AQ-7-F FAQ
1.How can I place an order for BC856AQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856AQ-7-F 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 BC856AQ-7-F reliable?
The price and inventory of BC856AQ-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856AQ-7-F is usually 5 days.
3.What payment methods are accepted for BC856AQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856AQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856AQ-7-F?
BC856AQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856AQ-7-F 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 BC856AQ-7-F?
For technical support, including BC856AQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856AQ-7-F requirements.
6.How does Aetrix verify that BC856AQ-7-F is sourced from the original manufacturer or authorized distributors?
All BC856AQ-7-F 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 BC856AQ-7-F meets industry standards.
7.What is the process for return or replacement of BC856AQ-7-F?
All BC856AQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC856AQ-7-F, 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 BC856AQ-7-F part is unused and in its original packaging.
Return procedure for BC856AQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856AQ-7-F Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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