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Diodes Incorporated BC846AQ-7-F
- Part No.:
- BC846AQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC846AQ-7-F.pdf
- Description:
- TRANS NPN 65V 0.1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,450
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Product details
Overview
BC846AQ-7-F from Diodes Incorporated is an NPN small-signal transistor in SOT23 package, rated for 80 V collector-base voltage, 65 V collector-emitter voltage, and 100 mA continuous collector current, with DC current gain (hFE) of 110–220 at 2 mA/5 V - used in low-power switching and audio-frequency amplification stages in industrial control interfaces and sensor signal conditioning circuits.
For engineers reviewing the BC846AQ-7-F datasheet, BC846AQ-7-F pinout, BC846AQ-7-F application, or BC846AQ-7-F equivalent, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (4 kV HBM), SOT23 terminal mapping, and automotive-grade alternatives aligned to AEC-Q101 requirements.
Technical Context
This transistor operates as a general-purpose NPN bipolar junction device optimized for linear amplification and digital switching in ambient temperatures from –65°C to +150°C. Its 310 mW power dissipation (on minimal pad layout) and 403°C/W junction-to-ambient thermal resistance define its thermal envelope under steady-state conditions.
The BC846AQ-7-F exhibits 100–300 MHz transition frequency (fT) at 10 mA/5 V, 90–250 mV VCE(sat) at 10 mA/0.5 mA drive, and 580–700 mV VBE(on) at 2 mA - confirming suitability for low-voltage, medium-speed signal routing where gain stability and saturation margin are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 80 V - supports circuit operation with up to 80 V reverse bias across collector-base junction without breakdown |
| VCEO | 65 V - defines maximum allowable collector-emitter voltage before avalanche conduction in common-emitter configuration |
| IC (continuous) | 100 mA - sets upper limit for sustained collector current in linear or switching modes without thermal runaway |
| hFE (min–max) | 110–220 - ensures predictable current amplification across production lots at 2 mA/5 V bias point |
| VCE(sat) | 90–250 mV - guarantees low on-state voltage drop at 10 mA/0.5 mA drive, minimizing power loss in switch applications |
| fT | 100–300 MHz - enables stable small-signal amplification up to ~100 MHz with usable gain margin |
| ESD HBM | 4,000 V - provides handling robustness during PCB assembly and system integration without external protection |
Pinout & Package
SOT23 surface-mount package with 3-pin configuration, 0.008 g mass, matte tin-plated leads, UL 94V-0 molded plastic body, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal in common-emitter topology | Connected to ground or low-impedance return path; determines emitter-follower output impedance and bias stability |
| 2 (Base) | Control input for minority-carrier injection | Receives current-limited drive signal; base resistance selection directly impacts switching speed and saturation depth |
| 3 (Collector) | Current source terminal in common-emitter topology | Interfaces with load resistor or downstream stage; voltage rating governs maximum supply rail compatibility |
Key Features
| Feature | Design Value |
|---|---|
| Automated insertion compatibility | Standardized SOT23 footprint and lead geometry enable high-yield pick-and-place placement without custom tooling |
| AEC-Q101 qualified variant | BC846AQ-7-F meets automotive stress test requirements including temperature cycling, HTOL, and ESD, enabling use in engine control modules |
| Green compound construction | Halogen- and antimony-free molding compound (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) satisfies IEC 61249-2-21 compliance |
| Low VCE(sat) at 10 mA | 90 mV typical saturation voltage reduces conduction loss by >30% versus legacy small-signal transistors at same current |
Applications
| Industrial Sensor Interface | USB Peripheral Power Switch |
|---|---|
Use Scenario: Amplifying millivolt-level outputs from RTD or thermistor bridges in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: NPN amplifier in common-emitter configuration providing 200× voltage gain with <2 dB noise figure at 1 kHz. Use Value: Enables 16-bit ADC resolution without external op-amp stages, reducing BOM count and board area by 35%. | Use Scenario: Enabling/disabling 5 V power rails to USB-C peripherals in docking stations with hot-plug detection. IC Role / Device Role / Timing Role: Low-side switch controlling VBUS path with <100 ns turn-on delay and <5 µA leakage in off-state. Use Value: Meets USB PD 3.0 power state transition timing while maintaining <10 nA quiescent current during sleep mode. |
| Automotive Cabin Lighting Control | IoT Node Signal Conditioning |
Use Scenario: Driving LED strings in interior map lights and door courtesy lamps with PWM dimming at 1 kHz. IC Role / Device Role / Timing Role: Switching element in constant-current sink topology, operating at 100 mA with 200 ns rise/fall times. Use Value: Supports AEC-Q101-compliant thermal cycling (–40°C to +125°C) and withstands load-dump transients up to 80 V. | Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., humidity, CO₂) before MCU ADC sampling in battery-powered edge nodes. IC Role / Device Role / Timing Role: Emitter-follower buffer isolating high-impedance sensor from ADC input, with 2.7 kΩ hie input impedance. Use Value: Maintains signal integrity over 10 cm PCB traces while consuming <5 µA base current at 3.3 V supply. |
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 |
|---|---|---|---|
| BC846BQ-7-F | Higher hFE range (200–450 vs. 110–220); identical VCEO, VCBO, and package | Better suited for low-drive amplifier stages requiring higher current gain stability at 10–100 µA base currents | Select when designing for improved β consistency across temperature or reduced base drive overhead |
| MMBT3904-7-F | Same SOT23 package but lower VCBO (60 V), higher VCE(sat) (300 mV typ), and no AEC-Q101 qualification | Acceptable for commercial-grade consumer electronics but not automotive or industrial safety-critical functions | Choose only for cost-sensitive non-automotive designs where 60 V rating suffices and ESD immunity ≥2 kV is adequate |
Compared with BC846BQ-7-F, the BC846AQ-7-F trades gain bandwidth for tighter hFE tolerance and lower base drive sensitivity; versus MMBT3904-7-F, it offers superior voltage rating, lower saturation voltage, and automotive qualification - making it optimal for high-reliability embedded control.
Availability
BC846AQ-7-F is available at Aetrix Electronics and suitable for industrial sensor interface, automotive cabin lighting control, and IoT node signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BC846AQ-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, specializing in high-reliability components for automotive, industrial, and computing markets with ISO/TS 16949 and IATF 16949 certified facilities.
The BC846AQ-7-F belongs to Diodes' AEC-Q101-qualified small-signal transistor family, engineered specifically for automotive subsystems and industrial controls demanding robust thermal performance, ESD resilience, and long-term parametric stability.
FAQ
Is BC846AQ-7-F pin-compatible with BC846A-7-F?
Yes - both share identical SOT23 pinout (Emitter-Base-Collector on pins 1-2-3), identical mechanical dimensions, and identical solder pad layout requirements. The 'Q' suffix denotes AEC-Q101 qualification and enhanced process controls, not physical or electrical pin reassignment.
What is the maximum operating temperature for BC846AQ-7-F in continuous operation?
The BC846AQ-7-F supports continuous operation from –65°C to +150°C junction temperature. At ambient temperatures above +85°C, derating is required: power dissipation must be reduced linearly from 310 mW at +25°C to zero at +150°C based on RθJA = 403°C/W.
Does BC846AQ-7-F require external ESD protection in USB applications?
No - its 4,000 V HBM ESD rating exceeds the IEC 61000-4-2 Level 2 requirement (2 kV contact discharge). When used in USB peripheral power switches with proper PCB layout (short traces, ground plane), no additional TVS diode is needed for ESD robustness.
How does the 'Q' suffix affect reliability testing for BC846AQ-7-F?
The 'Q' suffix confirms full AEC-Q101 qualification, including 1,000-hour high-temperature operating life (HTOL) at 150°C, 1,000-cycle temperature cycling (–40°C to +125°C), and failure-in-time (FIT) rate <100 FIT - exceeding standard industrial-grade reliability requirements by 3×.
BC846AQ-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:
- NPN
- 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
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 110 @ 2mA, 5V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BC846AQ-7-F FAQ
1.How can I place an order for BC846AQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846AQ-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 BC846AQ-7-F reliable?
The price and inventory of BC846AQ-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 BC846AQ-7-F is usually 5 days.
3.What payment methods are accepted for BC846AQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846AQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846AQ-7-F?
BC846AQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846AQ-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 BC846AQ-7-F?
For technical support, including BC846AQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846AQ-7-F requirements.
6.How does Aetrix verify that BC846AQ-7-F is sourced from the original manufacturer or authorized distributors?
All BC846AQ-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 BC846AQ-7-F meets industry standards.
7.What is the process for return or replacement of BC846AQ-7-F?
All BC846AQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC846AQ-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 BC846AQ-7-F part is unused and in its original packaging.
Return procedure for BC846AQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846AQ-7-F Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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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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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
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