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Diodes Incorporated BC856BQ-7-F
- Part No.:
- BC856BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC856BQ-7-F.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,350
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Product details
Overview
BC856BQ-7-F from Diodes Incorporated is a PNP small-signal transistor in SOT23 package, rated for VCEO = −65 V, IC = −100 mA, and hFE = 220–475 at IC = −2 mA. It delivers VCE(sat) ≤ −300 mV at IC = −10 mA / IB = −0.5 mA and fT ≥ 100 MHz, supporting switching and audio-frequency amplifier functions in automotive and industrial control circuits.
For engineers reviewing the BC856BQ-7-F datasheet, BC856BQ-7-F pinout, BC856BQ-7-F application, or BC856BQ-7-F equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, thermal derating curves, SOT23 terminal mapping, and direct-fit alternatives for discrete PNP switching and amplification design.
Technical Context
This device operates as a general-purpose PNP bipolar junction transistor with complementary pairing to the BC846–BC848 NPN family. Its high DC current gain (hFE up to 475) and low saturation voltage support efficient low-power switching in logic-level interfaces and signal inversion stages.
The BC856BQ-7-F is characterized for operation across −65 °C to +150 °C, with J-STD-020 Level 1 moisture sensitivity and 403 °C/W junction-to-ambient thermal resistance on minimum pad layout - enabling reliable use in thermally constrained PCBs without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V: Maximum collector-emitter blocking voltage before breakdown under open-base conditions. |
| IC (continuous) | −100 mA: Safe steady-state collector current without thermal runaway on standard FR-4 PCB. |
| hFE | 220–475: DC current gain range at IC = −2 mA, VCE = −5 V - enables precise biasing in amplifier stages. |
| VCE(sat) | ≤ −300 mV at IC = −10 mA / IB = −0.5 mA: Low saturation voltage ensures minimal power loss in saturated-switch applications. |
| fT | ≥ 100 MHz: Gain-bandwidth product supports AF amplification up to ~100 kHz with stable gain margin. |
| PD | 310 mW (min pad layout): Maximum dissipated power before exceeding TJ = 150 °C under still-air conditions. |
| ESD HBM | 4,000 V: Robust electrostatic discharge immunity per JEDEC JESD22-A114 - reduces handling sensitivity in assembly lines. |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated molding compound, and 0.008 g mass. Compatible with automated pick-and-place and reflow soldering per IPC-J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal | Connected to higher potential node in PNP configuration; must be biased above base and collector for active operation. |
| 2 (Base) | Control input | Receives reverse-biased current to modulate collector-emitter conduction; requires current-limiting resistor in most switch designs. |
| 3 (Collector) | Current sink terminal | Drains load current to ground or lower-potential rail; polarity-sensitive - must remain ≤ emitter voltage for forward-active mode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including body control modules and sensor interfaces requiring PPAP documentation. |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb). |
| SOT23 footprint compatibility | Standardized 3-pin outline (JEDEC TO-236AB) enables drop-in replacement with BC856AQ, BC857BQ, and MMBT3906. |
| High hFE consistency | Guaranteed 220–475 range at IC = −2 mA ensures predictable gain matching in dual-transistor circuits like differential pairs. |
Applications
| Automotive Door Module Switching | Industrial PLC Input Buffer |
|---|---|
Use Scenario: Driving LED indicators and relay coils in vehicle door control units where space and thermal budget are constrained. IC Role / Device Role / Timing Role: PNP switch controlling 12 V loads with logic-level base drive from microcontroller GPIO. Use Value: VCE(sat) ≤ −300 mV minimizes heat generation in sealed enclosures; AEC-Q101 qualification ensures field reliability over 15-year vehicle life. | Use Scenario: Level-shifting and isolation of 24 V digital inputs into 3.3 V/5 V PLC controller I/O banks. IC Role / Device Role / Timing Role: Discrete PNP inverter stage converting sinking-input signals to sourcing-compatible logic levels. Use Value: High hFE (220–475) allows low-base-current drive from optocoupler outputs, reducing system power consumption. |
| Consumer Audio Preamp Stage | Medical Sensor Signal Conditioning |
Use Scenario: Low-noise preamplifier for electret microphone biasing and signal amplification in portable health monitors. IC Role / Device Role / Timing Role: Common-emitter amplifier with emitter degeneration for stable gain and bandwidth control. Use Value: NF = 2–10 dB at 1 kHz enables clean audio capture; fT ≥ 100 MHz provides headroom for anti-alias filtering. | Use Scenario: Amplifying low-level analog outputs from temperature or pressure sensors in battery-powered diagnostic tools. IC Role / Device Role / Timing Role: DC-coupled PNP amplifier stage providing gain and impedance transformation before ADC input. Use Value: Wide operating temperature range (−65 °C to +150 °C) supports sterilization cycles and ambient storage; low ICBO ≤ −15 nA preserves signal integrity at microamp-level currents. |
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 |
|---|---|---|---|
| MMBT3906-7-F | VCEO = −40 V, hFE = 100–300, fT = 250 MHz | Lower voltage rating limits use in 48 V systems; higher fT suits faster switching but lower gain reduces bias stability. | Select when speed > gain priority and supply rails ≤ 40 V. |
| BC856AQ-7-F | hFE = 125–250, VCEO = −65 V, same package and pinout | Narrower gain band increases need for tighter biasing tolerance in production. | Choose for cost-sensitive designs where moderate gain variation is acceptable. |
Compared with BC856BQ-7-F, MMBT3906-7-F trades voltage robustness for RF performance, while BC856AQ-7-F offers identical packaging and voltage ratings but reduced gain consistency - making BC856BQ-7-F optimal for precision biasing in automotive and industrial signal chains.
Availability
BC856BQ-7-F is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input buffers, and medical sensor signal conditioning requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant traceability.
Supply support for BC856BQ-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 distribution operations across Asia, Europe, and North America.
The BC856BQ-7-F belongs to Diodes' BC856/BC857 series of AEC-Q101-qualified PNP transistors, engineered specifically for automotive and industrial applications demanding high-reliability discrete switching and amplification in compact SOT23 form factor.
FAQ
What is the maximum operating temperature for BC856BQ-7-F?
The BC856BQ-7-F is rated for junction and storage temperatures from −65 °C to +150 °C. This full-range specification supports deployment in under-hood automotive environments and industrial equipment exposed to thermal cycling, provided PCB layout maintains thermal resistance within datasheet limits (RθJA = 403 °C/W on minimum pad).
Is BC856BQ-7-F pin-compatible with BC856AQ-7-F?
Yes - both devices share identical SOT23 package dimensions, pinout (Emitter-Base-Collector), and mechanical footprint. The only functional difference is hFE binning: BC856BQ-7-F guarantees 220–475, while BC856AQ-7-F specifies 125–250. No PCB redesign is needed for substitution.
Does BC856BQ-7-F require special handling for ESD protection?
While BC856BQ-7-F meets JEDEC Class 3A HBM (4,000 V), it is not immune to ESD damage. Standard precautions - grounded workstations, ionized air, and wrist straps - are required during manual handling and board assembly. No additional external protection circuitry is needed in typical low-energy signal paths.
Can BC856BQ-7-F be used in linear amplifier configurations?
Yes - its specified hFE, VBE(on), and fT support common-emitter and emitter-follower amplifier topologies. For linear use, ensure VCE remains ≥ 1 V to avoid saturation, limit IC to ≤ 50 mA for thermal safety, and apply emitter degeneration resistors to stabilize gain against temperature drift.
BC856BQ-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:
- 220 @ 2mA, 5V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BC856BQ-7-F FAQ
1.How can I place an order for BC856BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856BQ-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 BC856BQ-7-F reliable?
The price and inventory of BC856BQ-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 BC856BQ-7-F is usually 5 days.
3.What payment methods are accepted for BC856BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856BQ-7-F?
BC856BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856BQ-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 BC856BQ-7-F?
For technical support, including BC856BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856BQ-7-F requirements.
6.How does Aetrix verify that BC856BQ-7-F is sourced from the original manufacturer or authorized distributors?
All BC856BQ-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 BC856BQ-7-F meets industry standards.
7.What is the process for return or replacement of BC856BQ-7-F?
All BC856BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC856BQ-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 BC856BQ-7-F part is unused and in its original packaging.
Return procedure for BC856BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856BQ-7-F Tags
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MMBT3906LT1G
onsemi
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Diodes Incorporated
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MMBT3904LT1G
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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MMBTA06LT1G
onsemi
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