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Diodes Incorporated BC846AW-7-F
- Part No.:
- BC846AW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC846AW-7-F.pdf
- Description:
- TRANS NPN 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:94,492
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Product details
Overview
BC846AW-7-F from Diodes Incorporated is an NPN small-signal transistor in SOT323 package, rated for 80 V VCBO, 65 V VCEO, and 100 mA continuous collector current, with DC current gain (hFE) of 110–220 at IC = 2 mA, VCE = 5 V, used in low-power switching and audio-frequency amplification circuits in consumer and industrial control modules.
For engineers reviewing the BC846AW-7-F datasheet, BC846AW-7-F pinout, BC846AW-7-F application, or BC846AW-7-F equivalent, key selection criteria include breakdown voltage margin, gain group consistency across temperature, saturation voltage at drive conditions, ESD robustness (4 kV HBM), and SOT323 thermal derating behavior in compact PCB layouts.
Technical Context
This NPN transistor operates in active, saturation, and cutoff regions with verified pulsed-characterized parameters: fT = 100–300 MHz at IC = 10 mA, VCE = 5 V; VCE(sat) ≤ 250 mV at IC = 10 mA / IB = 0.5 mA; and BVEBO = 6 V ensures stable biasing in common-emitter amplifier configurations.
Its SOT323 package delivers RθJA = 625 °C/W on minimum-pad FR4 layout, supporting operation from –65 °C to +150 °C, with JEDEC Class 3A HBM ESD rating and halogen/antimony-free "Green" construction compliant with RoHS 3 (2015/863/EU).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 80 V - blocks up to 80 V between collector and base, enabling use in 24–48 V supply rail switching stages |
| VCEO | 65 V - maximum safe collector-emitter voltage under open-base condition, suitable for relay drivers and logic-level translators |
| IC (continuous) | 100 mA - supports load switching up to ~100 mA without forced cooling in ambient temperatures ≤ 70 °C |
| hFE (A-group) | 110–220 - predictable DC gain band for consistent bias point setting in discrete amplifier stages |
| VCE(sat) @ 10 mA | ≤ 250 mV - low saturation voltage minimizes power loss and heat generation in high-duty-cycle switching |
| fT | 100–300 MHz - sufficient bandwidth for AF amplification and low-speed digital signal conditioning up to ~50 MHz |
| ESD HBM | 4,000 V - withstands typical handling ESD events without protection circuitry in final assembly environments |
Pinout & Package
Package: SOT323 - surface-mount plastic package with 3 terminals, 0.006 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 sink terminal | Connected to ground or low-side return path; requires low-impedance trace for stable biasing |
| 2 (Base) | Control input | Receives current-limited drive (e.g., via 10 kΩ resistor); sensitive to ESD due to thin oxide layer |
| 3 (Collector) | Current source terminal | Drives load toward positive rail; must be routed away from noise-sensitive analog traces |
Key Features
| Feature | Design Value |
|---|---|
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; no intentionally added lead, bromine & chlorine <900 ppm each |
| SOT323 automatic insertion compatibility | Standardized footprint and lead geometry enable high-yield placement on automated SMT lines |
| High-temperature operation | Rated for TJ = –65 °C to +150 °C, supporting use in under-hood automotive modules and industrial enclosures |
| Complementary PNP pairing | Directly paired with BC856W–BC858W series for push-pull output stages and differential amplifiers |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU outputs with current limiting. IC Role / Device Role / Timing Role: Low-side switch controlled by MCU GPIO, operating in saturation region. Use Value: VCE(sat) ≤ 250 mV ensures <0.5 mW dissipation per LED channel, eliminating need for heatsinking in dense LED arrays. |
Use Scenario: Extending I/O count for STM32 or PIC microcontrollers using discrete transistor buffers. IC Role / Device Role / Timing Role: Digital level shifter and current amplifier for driving higher-capacitance loads (e.g., LCD segments, optocouplers). Use Value: hFE ≥ 110 enables reliable switching with ≤ 100 µA base drive, reducing MCU port loading and timing skew. |
| Audio Pre-amplifier Stage | Industrial Sensor Interface |
|
Use Scenario: Single-transistor common-emitter amplifier for electret microphone bias and signal gain. IC Role / Device Role / Timing Role: Small-signal linear amplifier with fixed emitter degeneration for stable gain and low distortion. Use Value: NF ≤ 10 dB at 1 kHz and fT ≥ 100 MHz preserve voice-band fidelity while rejecting RF interference. |
Use Scenario: Isolating and conditioning analog sensor outputs (e.g., thermistor, RTD bridges) before ADC input. IC Role / Device Role / Timing Role: Emitter-follower buffer providing low-output-impedance drive to 12-bit SAR ADC reference inputs. Use Value: RθJA = 625 °C/W allows direct mounting near sensors without thermal drift impact on measurement accuracy. |
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 |
|---|---|---|---|
| BC846B-7-F | Higher hFE band (200–450), same VCBO/VCEO ratings and SOT323 package | Better suited for low-base-drive applications like battery-powered sensor nodes | Select when tighter gain tolerance and lower IB requirements outweigh cost sensitivity |
| MMBT3904LT1G | Same pinout but different gain band (100–300), slightly higher VCEO (40 V), and 350 mW PD rating | Preferred where higher power margin or legacy design reuse is required | Choose when existing PCB layout uses MMBT3904 footprint and thermal headroom >200 mW is available |
Compared with BC846B-7-F and MMBT3904LT1G, BC846AW-7-F offers the lowest base drive requirement among A-band transistors while maintaining identical package and voltage ratings-ideal for cost-optimized, space-constrained designs requiring predictable mid-range gain.
Availability
BC846AW-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio pre-amplifier stages, and industrial sensor interface modules requiring stable component supply and long-term production continuity.
Supply support for BC846AW-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 ISO/TS 16949-certified manufacturing facilities and broad distribution across industrial, computing, and consumer markets.
This device belongs to Diodes' BC846–BC848 family of general-purpose NPN transistors designed specifically for high-volume, cost-sensitive applications in portable electronics, power management subsystems, and signal conditioning interfaces.
FAQ
What is the maximum junction temperature for BC846AW-7-F during continuous operation?
The BC846AW-7-F has an absolute maximum junction temperature of +150 °C. Derating begins at +25 °C ambient, with power dissipation dropping linearly to zero at +150 °C ambient on a standard 1 oz copper FR4 board. Full-rated 200 mW operation is only valid below +75 °C ambient.
Can BC846AW-7-F replace BC847AW-7-F in an existing design?
Yes, but only if the circuit operates within BC846AW's higher voltage ratings (VCBO = 80 V, VCEO = 65 V) and does not rely on BC847AW's lower VCEO (45 V) for intentional overvoltage clamping. Gain and saturation characteristics differ slightly, so verify bias stability across temperature.
Is BC846AW-7-F qualified for automotive applications?
No-BC846AW-7-F is not AEC-Q101 qualified. Diodes offers automotive-grade variants (e.g., BC846BWQ-7-F) with PPAP documentation, IATF 16949 manufacturing, and extended temperature validation. Standard BC846AW-7-F is intended for commercial/industrial use only.
What marking code appears on the top of the BC846AW-7-F package?
The top-marking for BC846AW-7-F is "K1Q", followed by a two-character date code (e.g., "L2" for February 2024). The "K1Q" identifies the device as BC846AW; "K1R" denotes BC846BW, and "K1M" denotes BC847CW per Diodes' ordering information table.
BC846AW-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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):
- 20nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 110 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC846AW-7-F FAQ
1.How can I place an order for BC846AW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846AW-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 BC846AW-7-F reliable?
The price and inventory of BC846AW-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 BC846AW-7-F is usually 5 days.
3.What payment methods are accepted for BC846AW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846AW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846AW-7-F?
BC846AW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846AW-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 BC846AW-7-F?
For technical support, including BC846AW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846AW-7-F requirements.
6.How does Aetrix verify that BC846AW-7-F is sourced from the original manufacturer or authorized distributors?
All BC846AW-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 BC846AW-7-F meets industry standards.
7.What is the process for return or replacement of BC846AW-7-F?
All BC846AW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC846AW-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 BC846AW-7-F part is unused and in its original packaging.
Return procedure for BC846AW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846AW-7-F 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
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MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
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