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Diodes Incorporated BC847BFAQ-7B
- Part No.:
- BC847BFAQ-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- 3-XFDFN
- Datasheet:
-
BC847BFAQ-7B.pdf
- Description:
- TRANS NPN 45V 0.1A X2-DFN0806-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BC847BFAQ-7B from Diodes Incorporated is an AEC-Q101-qualified 45V NPN small-signal transistor in X2-DFN0806-3 package, delivering hFE = 200–470 at IC = 2–10mA, VCE(SAT) ≤ 125mV at IC = 100mA/IB = 5mA, and fT = 100–170MHz - deployed in automotive body control modules for load switching and signal amplification.
For engineers reviewing the BC847BFAQ-7B datasheet, BC847BFAQ-7B pinout, BC847BFAQ-7B application, or BC847BFAQ-7B equivalent, key selection criteria include its 435mW power dissipation in ultra-compact 0.48mm² footprint, AEC-Q101 qualification, and complementary PNP pairing with BC857BFA for push-pull designs.
Technical Context
This NPN BJT operates as a linear amplifier or saturated switch in low-voltage automotive subsystems. Its VCEO = 45V and IC = 100mA rating support 12V/24V rail interfacing, while fT ≥ 100MHz enables high-speed digital switching up to ~50MHz with controlled rise/fall times.
The device uses NiPdAu-plated terminals on a green molding compound (UL 94V-0), with thermal resistance RθJA = 287°C/W on minimal 1oz FR4 PCB and RθJL = 150°C/W to the exposed collector pad - enabling localized heat extraction in space-constrained modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45V - supports operation across full 12V automotive battery range including load dump transients |
| IC (cont.) | 100mA - sufficient for driving LEDs, relays, and logic-level interface loads without external buffering |
| hFE | 200–470 @ IC = 2–10mA - ensures stable DC biasing and predictable gain in sensor signal conditioning stages |
| VCE(SAT) | ≤125mV @ IC = 100mA/IB = 5mA - minimizes conduction loss and self-heating in always-on switching applications |
| fT | 100–170MHz - enables clean square-wave switching at >20MHz with <10ns propagation delay in gate driver pre-stages |
| PD | 435mW - achievable only with full collector pad soldered to copper pour; defines maximum continuous power in DFN layout |
| ESD HBM | 4kV - meets IEC 61000-4-2 Level 3 for robustness against handling and board-level ESD events |
Pinout & Package
Package: X2-DFN0806-3 - 0.60 × 0.80 mm, 0.4 mm height, molded green plastic (UL 94V-0), exposed collector pad on bottom for thermal and electrical connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Top-left, marked bar side) | Base | Control input requiring ~500µA drive for full saturation; referenced to emitter for bias network design |
| 2 (Top-right) | Emitter | Current return path; tied to ground or low-side reference; forms common-emitter configuration with collector output |
| 3 (Bottom, exposed pad) | Collector | Main power output terminal; must be fully soldered to PCB copper for thermal management and current carrying capacity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood environments: -55°C to +150°C operating range with PPAP documentation support |
| 0.48mm² footprint | 16× smaller than SOT-23 - enables dense placement in ECUs with strict board area constraints |
| NiPdAu terminal finish | Guarantees solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow profiles |
| Green compound (halogen/antimony-free) | Meets automotive OEM chemical compliance requirements: Br+Cl <1500ppm, Sb <1000ppm |
| Complementary PNP pair | BC857BFA shares identical package, ratings, and qualification - simplifies dual-rail design and layout symmetry |
Applications
| Automotive Door Module | LED Headlamp Driver |
|---|---|
Use Scenario: Switching window motor direction and mirror position actuators via MCU GPIO. IC Role / Device Role / Timing Role: Low-side saturated switch controlling 50–80mA inductive loads with fast turn-off to suppress back-EMF. Use Value: VCE(SAT) ≤125mV limits power loss to <10mW during active state, reducing thermal stress in sealed module housing. |
Use Scenario: Constant-current sink for daytime running lights (DRL) using PWM dimming. IC Role / Device Role / Timing Role: Linear current regulator stage with emitter-follower configuration and feedback resistor. Use Value: hFE stability across -40°C to +125°C ensures consistent LED brightness without recalibration. |
| Body Control Unit (BCU) | Infotainment Button Interface |
Use Scenario: Driving solenoid locks and HVAC damper actuators from 3.3V microcontroller outputs. IC Role / Device Role / Timing Role: Digital switch translating logic-level signals to 12V load control with integrated base resistor not required. Use Value: 45V VCEO withstands ISO 7637-2 pulse 5a (load dump) up to 40V, eliminating need for external clamping. |
Use Scenario: Debouncing mechanical push buttons connected to MCU interrupt pins. IC Role / Device Role / Timing Role: Schmitt-trigger input buffer providing noise immunity and clean edge generation. Use Value: High hFE and low VBE(ON) (580–750mV) ensure reliable turn-on with weak pull-up currents (<10µA). |
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,115 (Nexperia) | SOT-323 package (2.1 × 1.25 mm); hFE = 200–450; VCEO = 45V; same AEC-Q101 grade | Larger footprint increases board area by 5.5×; higher RθJA = 375°C/W reduces max ambient temperature capability | Select when legacy SMT lines lack DFN0806 reflow capability or require manual rework accessibility |
| MBT3904DW1T1G (onsemi) | SC-70 package (2.0 × 1.25 mm); hFE = 100–300; VCEO = 40V; AEC-Q101 qualified | Lower VCEO limits use in 24V systems; reduced fT = 300MHz but lower gain bandwidth trade-off | Prefer where cost sensitivity outweighs footprint and thermal performance, especially in non-critical 12V zones |
Compared with BC847BW and MBT3904DW1T1G, BC847BFAQ-7B delivers superior thermal density (435mW in 0.48mm²), tighter hFE distribution, and lower profile - making it optimal for next-gen compact automotive ECUs where board space and under-hood temperature margins are constrained.
Availability
BC847BFAQ-7B is available at Aetrix Electronics and suitable for automotive body control units, LED lighting drivers, infotainment interface circuits, and door module actuator control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BC847BFAQ-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 computing markets since 1964.
The BC847BFAQ belongs to Diodes' AEC-Q101-qualified small-signal transistor portfolio, engineered specifically for space-constrained, thermally demanding automotive subsystems where miniaturization and qualification rigor are mandatory.
FAQ
Is BC847BFAQ-7B pin-compatible with standard SOT-23 NPN transistors?
No - BC847BFAQ-7B uses the X2-DFN0806-3 package with three terminals (Base, Emitter, Collector pad), differing physically and electrically from SOT-23's three-leaded through-hole or gull-wing layout. Layout redesign and stencil adjustment are required for migration.
What is the maximum allowable PCB temperature during reflow for BC847BFAQ-7B?
The device is rated for MSL Level 1 per J-STD-020, permitting unlimited floor life and standard lead-free reflow profiles with peak temperature ≤260°C. The NiPdAu terminations withstand up to 260°C for 30 seconds without degradation.
Does BC847BFAQ-7B support linear (analog) operation, or is it intended only for switching?
It supports both modes: hFE characterization across IC = 10µA–100mA and VCE = 0.1–5V confirms stable gain for analog amplification, while low VCE(SAT) and fast fT enable efficient digital switching up to 20MHz.
How is thermal performance affected if the exposed collector pad is not fully soldered?
Leaving the collector pad unsoldered degrades RθJL from 150°C/W to >300°C/W and raises RθJA beyond 287°C/W, limiting safe continuous power to <150mW and risking thermal runaway above 60°C ambient - full pad soldering is mandatory per datasheet derating curves.
BC847BFAQ-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:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN0806-3
BC847BFAQ-7B FAQ
1.How can I place an order for BC847BFAQ-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847BFAQ-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 BC847BFAQ-7B reliable?
The price and inventory of BC847BFAQ-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847BFAQ-7B is usually 5 days.
3.What payment methods are accepted for BC847BFAQ-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847BFAQ-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847BFAQ-7B?
BC847BFAQ-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847BFAQ-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 BC847BFAQ-7B?
For technical support, including BC847BFAQ-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847BFAQ-7B requirements.
6.How does Aetrix verify that BC847BFAQ-7B is sourced from the original manufacturer or authorized distributors?
All BC847BFAQ-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 BC847BFAQ-7B meets industry standards.
7.What is the process for return or replacement of BC847BFAQ-7B?
All BC847BFAQ-7B units undergo pre-shipment inspection (PSI). If there is an issue with BC847BFAQ-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 BC847BFAQ-7B part is unused and in its original packaging.
Return procedure for BC847BFAQ-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847BFAQ-7B Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
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