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Diodes Incorporated BC847BFA-7B
- Part No.:
- BC847BFA-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- 3-XFDFN
- Datasheet:
-
BC847BFA-7B.pdf
- Description:
- TRANS NPN 45V 0.1A X2-DFN0806-3
- Quantity:
- Payment:
- Shipping:
Inventory:25,534
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Product details
Overview
BC847BFA-7B from Diodes Incorporated is a 45V NPN small-signal transistor in X2-DFN0806-3 package, rated for 100mA continuous collector current and 435mW power dissipation. It features BVCEO ≥ 45V, hFE = 200–470 (at IC = 2–10mA), fT = 100–170MHz, and is AEC-Q101 qualified for automotive-grade reliability. It serves as a general-purpose switching and amplification device in space-constrained PCBs.
For engineers reviewing the BC847BFA-7B datasheet, BC847BFA-7B pinout, BC847BFA-7B application, or BC847BFA-7B equivalent, key selection criteria include its ultra-small 0.48mm² footprint, 0.4mm height, NiPdAu terminal finish, JEDEC Class 3A HBM ESD rating (4kV), and thermal resistance RθJA = 287°C/W on minimum pad layout.
Technical Context
This NPN bipolar junction transistor operates in active, saturation, and cutoff regions with verified DC current gain hFE spanning 200–470 across IC = 10µA to 10mA. Its VCE(sat) is specified at 50–300mV (IC = 10–100mA, IB/IC = 10–20), enabling low-loss switching in digital logic interfaces and load drivers.
The device uses a thermally enhanced DFN package with exposed collector pad, delivering RθJL = 150°C/W to solder point and supporting pulsed operation up to 200mA (ICM). Its fT ≥ 100MHz and Cobo = 1.5pF support high-frequency amplification up to VHF band in compact RF front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown; enables use in 36V automotive supply rails with margin. |
| IC (continuous) | 100 mA - Sustained switching current for LED drivers, sensor interface stages, and logic-level translators. |
| PD | 435 mW - Power handling on standard FR4 PCB with minimum copper pad; defines thermal derating above 25°C ambient. |
| hFE | 200–470 - Current gain range at IC = 2–10mA; ensures stable biasing in amplifier and switch configurations. |
| fT | 100–170 MHz - Unity-gain frequency; supports small-signal amplification in IF stages and clock buffer circuits. |
| RθJA | 287 °C/W - Junction-to-ambient thermal resistance on single-sided 1oz FR4; informs heatsinking requirements for sustained loads. |
| ESD HBM | 4,000 V - Human Body Model rating per JESD22-A114; reduces risk of assembly-line ESD damage without external protection. |
Pinout & Package
Package: X2-DFN0806-3 - 0.60 × 0.80 mm body, 0.4 mm max height, exposed collector pad, NiPdAu-plated terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for base-emitter junction; connected to ground or low-impedance return path in common-emitter configuration. |
| 2 (Base) | Control input | Current-controlled gate for transistor action; requires ~0.6–0.8V forward bias and precise IB to achieve target IC. |
| 3 (Collector) | Output/Power terminal | Exposed metal pad functions as primary heat path and high-current output; must be soldered to thermal pad for rated PD. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact footprint | 0.48 mm² area - 16× smaller than SOT-23; saves board space in wearables, TWS earbuds, and multi-channel sensor modules. |
| Automotive qualification | AEC-Q101 compliant - validated for temperature cycling, HTRB, and ESD stress; suitable for under-hood and infotainment subsystems. |
| Green construction | Halogen- and antimony-free, RoHS-compliant molding compound (UL 94V-0) - meets Tier 1 automotive and EU environmental mandates. |
| Thermal performance | RθJL = 150°C/W - direct thermal path from junction to PCB via exposed collector pad; improves power handling over standard SOT packages. |
Applications
| LED Driver Stage | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Driving discrete indicator LEDs in instrument clusters and door modules with 12V/24V supply rails. IC Role / Device Role / Timing Role: NPN switch controlling LED anode current; operated in saturation with IB/IC = 10 for low VCE(sat). Use Value: 50mV typical VCE(sat) at 10mA reduces power loss and self-heating; AEC-Q101 rating ensures reliability across -40°C to +125°C. |
Use Scenario: Level-shifting and signal conditioning for analog outputs from pressure, temperature, and position sensors. IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias network; provides gain >100 and bandwidth >10MHz. Use Value: hFE ≥ 200 at 2mA ensures stable gain across temperature; fT ≥ 100MHz preserves signal integrity in fast-response sensor loops. |
| USB Port Protection Circuit | Low-Power Logic Translator |
|
Use Scenario: Overvoltage clamping and current limiting for USB 2.0 data lines in portable charging accessories. IC Role / Device Role / Timing Role: Active clamp using emitter-follower configuration with Zener reference; responds within nanoseconds. Use Value: VEBO = 6.0V enables precise clamping threshold; 4kV HBM ESD rating eliminates need for external TVS diodes on D+/D− lines. |
Use Scenario: Translating 1.8V/3.3V logic signals between microcontrollers and peripherals in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Digital switch in common-emitter topology; toggles between rail-to-rail states with <10ns propagation delay. Use Value: 0.4mm profile allows placement beneath connectors; 100mA IC supports multiple parallel loads without fanout limitation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BW-7-F (Diodes Inc.) | SOT-323 package (2.1 × 1.3 mm), higher RθJA = 350°C/W, same hFE and VCEO specs. | Larger footprint; less suitable for ultra-dense layouts but easier to rework manually. | Select when manual assembly or thermal margin >100°C/W is required; not drop-in for DFN-restricted footprints. |
| MMBT3904LT1G (ON Semi) | SC-70 package (2.2 × 1.35 mm), VCEO = 40V, hFE = 100–300, no AEC-Q101 qualification. | Lower voltage rating and unqualified for automotive; acceptable for consumer-grade logic switching only. | Choose for cost-sensitive non-automotive designs where 40V margin suffices and AEC compliance is unnecessary. |
Compared with BC847BW-7-F and MMBT3904LT1G, BC847BFA-7B uniquely combines AEC-Q101 qualification, 45V rating, and 0.48mm² footprint-making it the only option for space-constrained automotive signal conditioning where both reliability and miniaturization are mandatory.
Availability
BC847BFA-7B is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable LED driver modules, and USB port protection circuits requiring stable component supply and long-term lifecycle assurance.
Supply support for BC847BFA-7B 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, specializing in high-reliability components for automotive, industrial, and consumer markets since 1960.
The BC847BFA belongs to Diodes' AEC-Q101-qualified small-signal transistor family, engineered specifically for miniaturized, thermally efficient switching and amplification in harsh-environment electronics.
FAQ
What is the maximum operating temperature for BC847BFA-7B?
The BC847BFA-7B has a guaranteed operating junction temperature range of –55°C to +150°C. Its storage temperature matches this range. Derating begins above +25°C ambient, with maximum power dissipation decreasing linearly to zero at +150°C based on RθJA = 287°C/W and minimum PCB pad layout.
Is BC847BFA-7B pin-compatible with standard SOT-23 transistors?
No-BC847BFA-7B uses the X2-DFN0806-3 package with three terminals in a 0.60 × 0.80 mm outline and exposed collector pad, differing physically and electrically from SOT-23's 3.0 × 1.4 mm body and leaded construction. It requires dedicated land pattern per Diodes' recommended pad layout.
Does BC847BFA-7B require external ESD protection in USB applications?
No-its 4,000V HBM ESD rating (JEDEC Class 3A) exceeds IEC 61000-4-2 Level 2 (4kV contact) requirements. When used in USB 2.0 data line clamping with proper layout (short traces, grounded guard ring), it functions reliably without additional TVS devices.
How does the exposed collector pad affect thermal design?
The exposed collector pad is electrically connected to the collector and serves as the primary thermal conduction path. To achieve rated 435mW power dissipation, it must be soldered to a minimum 1.0 mm² copper area on inner or outer PCB layer, with thermal vias to internal planes if needed-per Diodes' suggested pad layout documentation.
BC847BFA-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-XFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 5V
- Power - Max:
- 435 mW
- Frequency - Transition:
- 170MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN0806-3
BC847BFA-7B FAQ
1.How can I place an order for BC847BFA-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847BFA-7B 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 BC847BFA-7B reliable?
The price and inventory of BC847BFA-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847BFA-7B is usually 5 days.
3.What payment methods are accepted for BC847BFA-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847BFA-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847BFA-7B?
BC847BFA-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847BFA-7B 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 BC847BFA-7B?
For technical support, including BC847BFA-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847BFA-7B requirements.
6.How does Aetrix verify that BC847BFA-7B is sourced from the original manufacturer or authorized distributors?
All BC847BFA-7B 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 BC847BFA-7B meets industry standards.
7.What is the process for return or replacement of BC847BFA-7B?
All BC847BFA-7B units undergo pre-shipment inspection (PSI). If there is an issue with BC847BFA-7B, 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 BC847BFA-7B part is unused and in its original packaging.
Return procedure for BC847BFA-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847BFA-7B Tags
-
MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
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MMBT2222ALT1G
onsemi
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