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Diodes Incorporated BC846BW-7-F
- Part No.:
- BC846BW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC846BW-7-F.pdf
- Description:
- TRANS NPN 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:61,952
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Product details
Overview
BC846BW-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 switching and audio-frequency amplifier stages in compact consumer and industrial PCBs.
For engineers reviewing the BC846BW-7-F datasheet, BC846BW-7-F pinout, BC846BW-7-F application, or BC846BW-7-F equivalent, key selection criteria include VCEO/VCBO margin, hFE group consistency at 2–10 mA bias, saturation voltage under 10 mA/0.5 mA drive, thermal derating on FR4, and SOT323 footprint compatibility with automated placement.
Technical Context
This transistor operates as a general-purpose NPN switch or linear amplifier with fixed-emitter biasing topology. Its Band B hFE range (200–450) ensures predictable base drive requirements across production lots, while fT ≥100 MHz supports stable operation up to low-MHz signal frequencies.
Designed for surface-mount assembly on single-sided FR4 boards, it delivers 200 mW power dissipation at 25°C ambient, derating linearly to zero at 150°C per RθJA = 625°C/W, and meets J-STD-020 Level 1 moisture sensitivity for reflow compatibility without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 80 V - Withstands 80 V reverse bias between collector and base before breakdown, enabling use in 48 V supply rail interfaces. |
| VCEO | 65 V - Maximum safe collector-to-emitter voltage under open-base condition, suitable for 24–48 V logic-level switching. |
| IC (continuous) | 100 mA - Supports load switching up to ~100 mA DC, e.g., LED drivers or relay coils with series limiting. |
| hFE (Band B) | 200–450 @ VCE=5 V, IC=2 mA - Ensures reliable saturation with ≤5 µA base current in low-power control circuits. |
| VCE(sat) | 90–250 mV @ IC=10 mA, IB=0.5 mA - Delivers low conduction loss in saturated-switch applications, minimizing heat generation. |
| fT | 100–300 MHz - Enables stable amplification or switching up to mid-frequency AF ranges without phase shift issues. |
| ESD HBM | 4,000 V - Provides robust handling tolerance during board assembly and bench testing without additional protection. |
Pinout & Package
Package: SOT323 - ultra-compact 3-pin surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), optimized for high-density routing and automated pick-and-place.
| 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 | Accepts TTL/CMOS-compatible drive; 0.7 V turn-on threshold enables direct microcontroller GPIO interfacing. |
| 3 (Collector) | Current source terminal | Drives loads referenced to VCC; layout must minimize parasitic inductance for fast switching. |
Key Features
| Feature | Design Value |
|---|---|
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; no added lead, antimony, or halogen compounds above defined thresholds. |
| SOT323 mechanical compatibility | Standardized footprint matching JEDEC MO-203AA; enables drop-in replacement with BC846AW/BW/CW and BC847/848 variants. |
| Thermal performance | RθJA = 625°C/W on minimum pad layout allows full 200 mW dissipation at ≤50°C ambient without heatsinking. |
| Automated insertion ready | Matte tin-plated leads meet MIL-STD-202 Method 208 solderability; compatible with standard reflow profiles (J-STD-020 Level 1). |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving discrete indicator LEDs or low-current RGB segments from 3.3 V or 5 V MCU outputs. IC Role / Device Role / Timing Role: NPN switch controlling LED anode/cathode current path with active-low logic interface. Use Value: VCE(sat) ≤250 mV at 10 mA ensures >95% efficiency in LED forward voltage utilization. | Use Scenario: Extending digital output capability of resource-constrained MCUs (e.g., STM32F0, PIC16) to drive higher-current peripherals. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between MCU GPIO and external solenoids, buzzers, or optocouplers. Use Value: hFE ≥200 guarantees <5 µA base current requirement for 1 mA load drive, preserving MCU port drive strength. |
| AF Signal Amplifier Stage | Power Supply Enable Switch |
Use Scenario: Low-noise preamplifier stage in portable audio devices (e.g., headphone amps, microphone biasing). IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with 10–20 kHz bandwidth and NF ≤10 dB at 1 kHz. Use Value: fT ≥100 MHz and hFE stability across temperature ensure consistent gain flatness in battery-powered analog front-ends. | Use Scenario: Enabling/disabling auxiliary power rails (e.g., 3.3 V sensor supply) via MCU-controlled high-side or low-side switch. IC Role / Device Role / Timing Role: Low-leakage, fast-turnoff switch isolating downstream circuitry during standby or fault conditions. Use Value: ICBO ≤20 nA at 30 V ensures <1 µA standby current draw, critical for battery longevity in IoT endpoints. |
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 |
|---|---|---|---|
| BC846BMTF | Same electrical specs; SOT-23 package (larger footprint, higher RθJA = 450°C/W) | Less dense layout; better thermal margin at high ambient but incompatible SOT323 land pattern | Select when board space allows larger package and thermal headroom is prioritized over miniaturization. |
| MMBT3904LT1G | Lower VCEO (40 V), wider hFE spread (100–300), same SOT-23 | Not suitable for 48 V systems; requires tighter base resistor tolerance for consistent saturation | Prefer only in cost-sensitive 5–24 V designs where VCEO margin is non-critical and gain variation is acceptable. |
Compared with BC846BW-7-F, BC846BMTF offers identical gain and voltage ratings but trades SOT323 miniaturization for improved thermal resistance, while MMBT3904LT1G reduces cost and size flexibility at the expense of voltage headroom and gain consistency-making BC846BW-7-F optimal for space-constrained 48 V switching with stable hFE.
Availability
BC846BW-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, AF signal amplification, and power supply enable switching requiring stable component supply and SOT323 footprint compliance.
Supply support for BC846BW-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, industry-qualified components for automotive, industrial, and consumer markets.
The BC846–BC848 series belongs to Diodes' general-purpose bipolar transistor product line, designed specifically for cost-effective, high-yield SMT implementation in space-constrained switching and amplification applications.
FAQ
What is the maximum operating temperature for BC846BW-7-F?
The BC846BW-7-F has an operating junction temperature range of –65°C to +150°C. Derating begins at +25°C ambient, with power dissipation linearly reduced to zero at +150°C based on RθJA = 625°C/W. This allows full 200 mW operation only below +50°C ambient on standard FR4 layouts.
Is BC846BW-7-F suitable for automotive applications?
BC846BW-7-F itself is not AEC-Q101 qualified. Diodes offers automotive-grade versions (e.g., BC846BWQ-7-F) with PPAP documentation, IATF 16949 manufacturing, and extended temperature validation. For non-automotive industrial or consumer use, this standard part meets all reliability and RoHS requirements.
How does the Band B hFE grouping affect circuit design?
Band B specifies hFE = 200–450 at VCE = 5 V and IC = 2 mA. Designers must size base resistors to ensure saturation across this full range-e.g., using worst-case hFE = 200 to calculate minimum IB, preventing unintended linear-mode operation under low-gain units.
Can BC846BW-7-F replace BC847BW-7-F in existing designs?
No-BC846BW-7-F has VCEO = 65 V and VCBO = 80 V, while BC847BW-7-F is rated at VCEO = 45 V and VCBO = 50 V. Substitution is only safe if the application's maximum collector-emitter voltage remains ≤45 V; otherwise, overvoltage stress may cause premature failure.
BC846BW-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC846BW-7-F FAQ
1.How can I place an order for BC846BW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846BW-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 BC846BW-7-F reliable?
The price and inventory of BC846BW-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 BC846BW-7-F is usually 5 days.
3.What payment methods are accepted for BC846BW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846BW-7-F?
BC846BW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846BW-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 BC846BW-7-F?
For technical support, including BC846BW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BW-7-F requirements.
6.How does Aetrix verify that BC846BW-7-F is sourced from the original manufacturer or authorized distributors?
All BC846BW-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 BC846BW-7-F meets industry standards.
7.What is the process for return or replacement of BC846BW-7-F?
All BC846BW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC846BW-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 BC846BW-7-F part is unused and in its original packaging.
Return procedure for BC846BW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846BW-7-F Tags
-
MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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MMBT3906-7-F
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.
-
SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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