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Diodes Incorporated BC846BWQ-7-F
- Part No.:
- BC846BWQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC846BWQ-7-F.pdf
- Description:
- TRANS NPN 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:7,149
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Product details
Overview
BC846BWQ-7-F from Diodes Incorporated is an NPN small-signal transistor in SOT323 package, rated for 80 VCBO, 65 VCEO, 100 mA continuous collector current, and DC current gain (hFE) of 200–450 (Band B), used in low-power switching and audio-frequency amplifier stages in compact consumer and industrial control circuits.
For engineers reviewing the BC846BWQ-7-F datasheet, BC846BWQ-7-F pinout, BC846BWQ-7-F application, or BC846BWQ-7-F equivalent, key selection criteria include its SOT323 footprint compatibility, 200 mW power dissipation at TA = 25°C, ESD robustness (4 kV HBM), and guaranteed hFE banding for consistent biasing in discrete gain blocks and digital logic interface circuits.
Technical Context
This NPN transistor operates with a maximum collector-emitter saturation voltage of 250 mV at IC = 10 mA / IB = 0.5 mA and exhibits a transition frequency (fT) of 100–300 MHz at VCE = 5 V / IC = 10 mA, supporting stable amplification up to mid-VHF range. Its 6 VEBO rating enables reliable base drive in 5 V logic-level interfaces.
The device features a thermal resistance of 625 °C/W (junction-to-ambient) on standard FR4 PCBs and meets AEC-Q101 stress-test requirements when qualified per automotive change control-though this specific reel (BC846BWQ-7-F) carries no AEC marking and is intended for commercial-grade applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 80 V - Withstands 80 V reverse bias between collector and base without breakdown, enabling use in 24 V supply rail switching with margin. |
| VCEO | 65 V - Maximum safe collector-emitter voltage under open-base condition, suitable for 48 V system signal conditioning. |
| IC (continuous) | 100 mA - Supports load switching up to ~100 mA DC, e.g., LED drivers or relay coils in portable equipment. |
| hFE (Band B) | 200–450 - Tight DC current gain spread ensures predictable base resistor sizing for consistent turn-on in discrete amplifier or switch designs. |
| VCE(sat) | 90–250 mV @ IC=10 mA/IB=0.5 mA - Low saturation voltage minimizes conduction loss and self-heating in high-duty-cycle switching. |
| fT | 100–300 MHz - Enables linear amplification of signals up to ~100 MHz with usable gain, appropriate for RF front-end preamps or oscillator buffers. |
| ESD HBM | 4,000 V - Robust handling tolerance allows direct assembly into automated SMT lines without special ESD precautions beyond standard Class 1A controls. |
Pinout & Package
Package: SOT323 - ultra-compact surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), optimized for high-density PCB layouts and reflow-compatible matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-side return path; polarity defines NPN operation and dictates emitter-follower vs. common-emitter configuration. |
| 2 (Base) | Control input | Receives forward-biased current to enable conduction; requires series resistor to limit IB and ensure saturation or linear operation. |
| 3 (Collector) | Current source terminal | Connected to load and supply rail; voltage swing capability defined by VCEO and thermal limits under sustained IC. |
Key Features
| Feature | Design Value |
|---|---|
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; contains <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports green manufacturing and export compliance. |
| SOT323 mechanical compatibility | Standardized footprint matches JEDEC MO-203AA; enables drop-in replacement with BC847BW, MMBT3904, or DXTN07100. |
| Moisture Sensitivity Level 1 | No bake requirement prior to reflow; safe for standard SMT assembly without dry-pack or humidity-controlled storage. |
| High hFE consistency (Band B) | Guaranteed 200–450 hFE at VCE = 5 V / IC = 2 mA - reduces calibration overhead in analog sensor interfaces and precision current mirrors. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU outputs in space-constrained IoT nodes. IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, sinking LED current to ground. Use Value: Low VCE(sat) (≤250 mV) ensures >95% efficiency at 20 mA, minimizing heat rise in sealed enclosures. |
Use Scenario: Level-shifting and current boosting between 1.8 V/3.3 V microcontrollers and 5 V peripherals (e.g., legacy sensors or displays). IC Role / Device Role / Timing Role: Discrete level translator with active pull-down, enabling bidirectional signal conditioning without dedicated ICs. Use Value: Guaranteed hFE band ensures predictable base current draw (<10 µA) and fast edge response for 100 kHz control signals. |
| Audio Pre-amplifier Stage | Power Supply Enable Switch |
Use Scenario: Low-noise voltage amplification of electret microphone output in battery-powered voice recorders. IC Role / Device Role / Timing Role: Common-emitter amplifier biased at IC = 0.5 mA for optimal NF (10 dB) and linearity. Use Value: fT ≥100 MHz and low noise figure support clean 20 Hz–20 kHz signal integrity with minimal added distortion. |
Use Scenario: Enabling/disabling 12 V auxiliary rails in industrial PLC I/O modules via 3.3 V logic signals. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling PMOS/NMOS gate drive circuitry. Use Value: 65 V VCEO and 100 mA IC allow direct control of gate resistors for MOSFETs driving ≤1 A loads. |
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 |
|---|---|---|---|
| MMBT3904-7-F | Lower VCBO (60 V), wider hFE range (100–300), same SOT323 package and pinout. | Less margin in 48 V systems; higher variability in bias point stability across temperature. | Select when cost sensitivity outweighs need for tight hFE control and higher voltage headroom. |
| BC847BW-7-F | Identical package, pinout, and Band B hFE, but lower VCBO/VCEO (50 V/45 V) and reduced fT (min 100 MHz). | Not suitable for 60 V+ supply monitoring or high-speed pulse amplification above 50 MHz. | Prefer where 45 V VCEO suffices and tighter parametric binning is unnecessary. |
Compared with MMBT3904-7-F and BC847BW-7-F, BC846BWQ-7-F delivers superior voltage standoff and tighter hFE consistency-critical for stable biasing in precision analog stages and robust operation in 24–48 V industrial interfaces.
Availability
BC846BWQ-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfacing, and audio pre-amplifier stages requiring stable component supply, consistent parametric binning, and RoHS-compliant SMT assembly.
Supply support for BC846BWQ-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 the Americas.
This transistor belongs to Diodes' BC846–BC848 family-engineered for high-volume, cost-sensitive applications demanding reliability, tight gain grouping, and compatibility with automated SMT assembly in consumer, computing, and industrial electronics.
FAQ
What is the maximum operating junction temperature for BC846BWQ-7-F?
The BC846BWQ-7-F has a specified operating junction temperature range of –65 °C to +150 °C. At ambient temperatures above 25 °C, derating applies: power dissipation must be reduced linearly beyond 200 mW at a rate of 0.32 mW/°C, based on RθJA = 625 °C/W and minimum pad layout on FR4.
Is BC846BWQ-7-F qualified to AEC-Q101?
No-BC846BWQ-7-F is not AEC-Q101 qualified. While Diodes offers AEC-Q101 versions of the BC846–BC848 series (e.g., BC846BWQ-7-F with "Q" suffix denotes automotive qualification), this specific part number lacks AEC marking and is intended for commercial-grade applications only.
How does the "W" suffix in BC846BWQ-7-F relate to hFE grouping?
The "W" suffix identifies Band B hFE grouping (200–450 at VCE = 5 V, IC = 2 mA). This is distinct from "A" (110–220) and "C" (420–800) bands. The "Q" in BC846BWQ-7-F indicates tape-and-reel packaging with 3,000 units per 7-inch reel, not automotive qualification.
Can BC846BWQ-7-F replace BC846B in existing designs?
Yes-BC846BWQ-7-F is a direct functional and physical replacement for BC846B variants in SOT323 packages. It maintains identical absolute maximum ratings, electrical characteristics, pinout, and thermal behavior; the "W" and "Q-7-F" denote hFE band and packaging format, not performance deviation.
BC846BWQ-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:
- 200 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC846BWQ-7-F FAQ
1.How can I place an order for BC846BWQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846BWQ-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 BC846BWQ-7-F reliable?
The price and inventory of BC846BWQ-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 BC846BWQ-7-F is usually 5 days.
3.What payment methods are accepted for BC846BWQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BWQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846BWQ-7-F?
BC846BWQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846BWQ-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 BC846BWQ-7-F?
For technical support, including BC846BWQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BWQ-7-F requirements.
6.How does Aetrix verify that BC846BWQ-7-F is sourced from the original manufacturer or authorized distributors?
All BC846BWQ-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 BC846BWQ-7-F meets industry standards.
7.What is the process for return or replacement of BC846BWQ-7-F?
All BC846BWQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC846BWQ-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 BC846BWQ-7-F part is unused and in its original packaging.
Return procedure for BC846BWQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846BWQ-7-F Tags
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MMBT3906LT1G
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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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