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onsemi BC847AWT1
- Part No.:
- BC847AWT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC847AWT1.pdf
- Description:
- TRANS NPN 45V 0.1A SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:84,000
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Product details
Overview
BC847AWT1 from onsemi is an NPN silicon general-purpose transistor in SC-70 (SOT-323) package, rated for 45 V VCEO, 100 mA IC, and 200 mW PD, with DC current gain hFE of 110–220 at IC = 10 mA, used in low-power signal amplification and switching circuits in consumer electronics and industrial controls.
For engineers reviewing the BC847AWT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated SC-70 terminal mapping, confirmed AEC-Q101 qualification status, and real-world use cases in discrete amplifier stages and digital logic interface buffering.
Technical Context
The BC847AWT1 operates as a single NPN bipolar junction transistor optimized for linear amplification and saturated switching. Its hFE range (110–220), VCE(sat) ≤ 0.6 V at IC = 10 mA / IB = 0.5 mA, and fT = 100 MHz support stable small-signal gain and fast turn-on/turn-off in portable and space-constrained designs.
Thermal performance is defined by RJA = 620 °C/W on FR-5 board and TJ range of −55 °C to +150 °C, enabling operation in automotive cabin modules and industrial sensor interfaces where ambient temperature fluctuation exceeds 85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; supports 3.3 V and 5 V logic-level switching with margin. |
| IC | 100 mA - Continuous collector current rating; suitable for driving LEDs, relays, and small-signal loads without heatsinking. |
| hFE | 110–220 - DC current gain at IC = 10 mA, VCE = 5 V; enables predictable base drive sizing in amplifier and switch bias networks. |
| VCE(sat) | ≤ 0.6 V - Collector-emitter saturation voltage at IC = 10 mA / IB = 0.5 mA; minimizes power loss in on-state switching applications. |
| fT | 100 MHz - Current-gain bandwidth product; supports audio-frequency amplification and low-speed digital signal conditioning. |
| Cobo | 4.5 pF - Output capacitance at VCB = 10 V; limits high-frequency gain roll-off and affects stability in RF-adjacent layouts. |
| PD | 200 mW - Total device dissipation on FR-5 board at 25 °C; defines maximum continuous power handling in surface-mount PCBs. |
Pinout & Package
BC847AWT1 uses the SC-70 (SOT-323) package per Case 419, Style 3, with 3 terminals in a 2.2 mm × 1.35 mm footprint and 0.65 mm pitch. The package is Pb-free, RoHS-compliant, and qualified to AEC-Q101 for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control electrode; requires ~0.7 V forward bias and precise IB to achieve target IC in active or saturation region. |
| 2 | Emiter | Current source terminal in common-emitter configuration; connected to ground or low-impedance return path for signal integrity. |
| 3 | Collector | Output current sink; connects to load and supply rail; must remain within 45 V and 100 mA limits during all operating conditions. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and cabin applications including engine control sensors and body electronics modules. |
| Pb-free, Halogen-free, RoHS compliant | Meets global environmental compliance requirements for industrial and consumer end equipment without lead or brominated flame retardants. |
| SC-70/SOT-323 package | Enables high-density PCB layouts with 2.2 mm × 1.35 mm footprint and thermal resistance of 620 °C/W on standard FR-5 board. |
| Low VCE(sat) | Ensures <0.6 V drop at 10 mA collector current, reducing conduction loss in battery-powered switching circuits and logic level translators. |
| 100 MHz fT | Supports stable small-signal amplification up to audio band (20 kHz) with adequate gain margin and phase stability. |
Applications
| Audio Signal Amplifier Stage | Microcontroller GPIO Interface Buffer |
|---|---|
Use Scenario: Amplifying line-level analog signals from MEMS microphones or DAC outputs in portable audio devices. IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology to provide voltage gain with minimal distortion. Use Value: hFE = 110–220 and fT = 100 MHz ensure flat frequency response up to 20 kHz and low noise figure (NF ≤ 10 dB). |
Use Scenario: Level-shifting and current boosting between 3.3 V microcontroller outputs and 5 V peripheral inputs. IC Role / Device Role / Timing Role: Saturated switch translating logic states while isolating MCU pins from higher-current loads. Use Value: VCE(sat) ≤ 0.6 V and IC = 100 mA enable reliable on/off control with <200 mW dissipation and no external heat sinking. |
| Automotive Cabin Temperature Sensor Interface | Industrial PLC Input Signal Conditioning |
Use Scenario: Converting thermistor resistance changes into amplified voltage signals for ADC sampling in HVAC control units. IC Role / Device Role / Timing Role: Linear amplifier stage providing gain and impedance matching between passive sensor and analog front-end. Use Value: AEC-Q101 qualification and −55 °C to +150 °C TJ guarantee operation across full automotive temperature range. |
Use Scenario: Isolating and conditioning 24 V DC field signals before feeding into 3.3 V logic inputs of programmable logic controllers. IC Role / Device Role / Timing Role: Discrete NPN switch converting industrial voltage levels to safe logic-compatible levels. Use Value: VCEO = 45 V provides 1.8× safety margin over 24 V nominal supply, preventing breakdown during transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BW | Higher hFE range (200–450) and same VCEO/IC ratings; identical SC-70 package and pinout. | Better suited for low-base-drive applications like high-gain preamplifiers; less ideal where tight hFE tolerance is required. | Select BC847BW when higher current gain is needed without layout change; verify bias network stability across wider hFE spread. |
| MMBT3904LT1G | Same NPN type, SC-70 package, but VCEO = 40 V, hFE = 100–300, and VCE(sat) = 0.2 V typical at IC = 10 mA. | Marginally lower voltage rating; slightly lower saturation voltage improves efficiency in high-duty-cycle switching. | Choose MMBT3904LT1G for cost-sensitive industrial designs where 40 V rating suffices and lower VCE(sat) reduces thermal load. |
Compared with BC847AWT1, BC847BW offers higher gain for sensitive amplification but looser hFE consistency, while MMBT3904LT1G trades 5 V headroom for improved saturation efficiency-both require validation of bias stability and thermal margin in final layout.
Availability
BC847AWT1 is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial sensor interfaces, and portable audio signal conditioning requiring stable component supply, AEC-Q101 compliance, and long-term manufacturing continuity.
Supply support for BC847AWT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The BC847AWT1 belongs to onsemi's BC846/BC847/BC848 family of general-purpose NPN transistors designed for low-power surface-mount amplification and switching in space-constrained, thermally demanding environments.
FAQ
What is the maximum collector-emitter voltage rating for BC847AWT1?
The BC847AWT1 has a maximum collector-emitter voltage (VCEO) rating of 45 V, as specified in the onsemi datasheet under Maximum Ratings. This value is measured at IC = 10 mA and defines the absolute upper limit before avalanche breakdown occurs. Exceeding 45 V risks permanent damage, especially under elevated temperature or transient conditions. Designers should maintain ≥20% derating margin in production circuits.
Is BC847AWT1 suitable for automotive applications?
Yes, BC847AWT1 is AEC-Q101 qualified and PPAP capable, as confirmed in the onsemi datasheet's Features section and Ordering Information table. It meets stress testing requirements for temperature cycling, humidity, mechanical shock, and ESD robustness required in automotive cabin and body electronics. The S-prefix variant (SBC847AWT1G*) explicitly denotes automotive-grade traceability and control.
What is the DC current gain (hFE) range of BC847AWT1 at 10 mA collector current?
The BC847AWT1 exhibits a DC current gain (hFE) range of 110 to 220 when tested at IC = 10 mA and VCE = 5.0 V, per the Electrical Characteristics table in the onsemi datasheet. This range reflects device-to-device variation across the production lot and must be accounted for in bias network design to ensure consistent operation across temperature and supply voltage extremes.
Does BC847AWT1 have a Pb-free and RoHS-compliant package?
Yes, BC847AWT1 is packaged in a Pb-free, halogen-free, and RoHS-compliant SC-70 (SOT-323) case, as stated in the Features section and confirmed in the Ordering Information table (marked "Pb-Free" and "G" suffix). The device meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 3 moisture sensitivity level (MSL-1), allowing standard reflow soldering without special handling.
What is the thermal resistance (RJA) of BC847AWT1 on FR-5 board?
The BC847AWT1 has a junction-to-ambient thermal resistance (RJA) of 620 °C/W when mounted on a standard FR-5 printed circuit board with 25 °C ambient temperature, per the Thermal Characteristics table. This value assumes minimal copper pour; adding thermal vias or copper planes can reduce RJA by 20–40%, critical for sustained 100 mA operation near maximum ambient temperature.
BC847AWT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 110 @ 2mA, 5V
- Power - Max:
- 225 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3 (SOT323)
BC847AWT1 FAQ
1.How can I place an order for BC847AWT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847AWT1 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 BC847AWT1 reliable?
The price and inventory of BC847AWT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847AWT1 is usually 5 days.
3.What payment methods are accepted for BC847AWT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847AWT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847AWT1?
BC847AWT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847AWT1 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 BC847AWT1?
For technical support, including BC847AWT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847AWT1 requirements.
6.How does Aetrix verify that BC847AWT1 is sourced from the original manufacturer or authorized distributors?
All BC847AWT1 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 BC847AWT1 meets industry standards.
7.What is the process for return or replacement of BC847AWT1?
All BC847AWT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC847AWT1, 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 BC847AWT1 part is unused and in its original packaging.
Return procedure for BC847AWT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847AWT1 Tags
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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
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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MMBTA06LT1G
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