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onsemi BC846AWT1G
- Part No.:
- BC846AWT1G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC846AWT1G.pdf
- Description:
- TRANS NPN 65V 0.1A SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,121
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Product details
Overview
BC846AWT1G from onsemi is an NPN silicon general-purpose transistor in SC-70 (SOT-323) package, rated for 65 VCEO, 100 mA continuous collector current, and 200 mW power dissipation at 25 °C. It delivers DC current gain (hFE) of 110–220 at IC = 10 mA, VCE = 5 V, and supports amplifier and switching functions in low-power portable electronics.
For engineers reviewing the BC846AWT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 65 VCEO rating, SC-70 thermal performance (RJA = 620 °C/W), hFE binning consistency, and AEC-Q101 qualification for automotive signal conditioning circuits.
Technical Context
The BC846AWT1G operates as a discrete NPN bipolar junction transistor optimized for linear amplification and low-speed switching. Its base-emitter turn-on voltage is 580–700 mV at IC = 2 mA, and saturation voltage is ≤0.25 V at IC = 10 mA / IB = 0.5 mA - enabling efficient biasing in Class-A amplifier stages and digital logic interface buffers.
Designed for surface-mount use on FR-5 PCBs, it features a maximum junction temperature of +150 °C and storage range from −55 °C to +150 °C. Its 100 MHz fT and 4.5 pF Cobo support audio-frequency amplification and low-noise preamplifier designs with NF ≤ 10 dB at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - supports rail-to-rail operation in 48 V industrial control I/O modules |
| IC (continuous) | 100 mA - sufficient for driving LED indicators, small relays, or sensor interface loads |
| PD (TA = 25 °C) | 200 mW - defines maximum steady-state power handling on standard FR-5 board |
| hFE | 110–220 - ensures predictable current amplification across production lots at 10 mA bias |
| fT | 100 MHz - enables stable gain in audio preamp and low-speed RF detector applications |
| Cobo | 4.5 pF - limits high-frequency feedback in multi-stage amplifier topologies |
| NF (1 kHz) | 10 dB - specifies noise floor for analog signal conditioning in sensor front-ends |
Pinout & Package
BC846AWT1G uses the SC-70 (SOT-323) package per CASE 419, STYLE 3: 1.5 mm × 1.3 mm footprint, 0.95 mm height, gull-wing leads, Pb-free finish. Thermal resistance is 620 °C/W (junction-to-ambient, FR-5 board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Controls minority-carrier injection; requires 0.5 mA drive for 10 mA collector switching |
| 2 | Emiter | Common reference node; connects to ground or low-impedance return path in common-emitter config |
| 3 | Collector | Output terminal; handles up to 65 V and 100 mA; routed to load or next stage input |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive ambient temperature cycling (−40 °C to +125 °C) and humidity testing |
| Pb-free, RoHS compliant | Meets EU Directive 2011/65/EU and halogen-free/BFR-free requirements for green manufacturing |
| SC-70 thermal design | Enables 200 mW dissipation in space-constrained portable devices without heatsinking |
| hFE binning (A grade) | Guarantees 110–220 gain spread - simplifies bias network design in production assemblies |
| Low VCE(sat) | ≤0.25 V at IC/IB = 20 - reduces conduction loss in battery-powered switch-mode interfaces |
Applications
| Audio Preamp Stage | Sensor Signal Conditioning |
|---|---|
Use Scenario: Amplifying weak microphone or piezoelectric sensor outputs in portable voice recorders. IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with fixed bias. Use Value: 100 MHz fT and 10 dB noise figure enable clean 20 Hz–20 kHz signal gain without added distortion. | Use Scenario: Converting thermistor or photodiode current into stable voltage for ADC input. IC Role / Device Role / Timing Role: Transimpedance or emitter-follower buffer stage in analog front-end. Use Value: Tight hFE binning (110–220) ensures consistent gain calibration across production units. |
| Industrial I/O Interface | Automotive LED Driver |
Use Scenario: Level-shifting and isolating 24 V PLC digital inputs to 3.3 V microcontroller GPIO. IC Role / Device Role / Timing Role: Digital switch in common-emitter saturated mode. Use Value: 65 VCEO withstands transient surges on factory floor wiring; VCE(sat) ≤ 0.25 V minimizes heat in always-on monitoring circuits. | Use Scenario: Driving dashboard indicator LEDs from 12 V vehicle supply with PWM dimming. IC Role / Device Role / Timing Role: Low-side switch controlling LED cathode current path. Use Value: AEC-Q101 qualification ensures reliability under automotive thermal cycling; 100 mA IC supports multi-LED strings. |
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 |
|---|---|---|---|
| BC846BWT1G | Higher hFE range (200–450) at same test conditions; otherwise identical ratings and package | Better suited for low-base-drive applications like high-gain sensor amplifiers | Select BC846BWT1G when higher current gain is required without changing layout or thermal design |
| MMBT3904LT1G | Same SC-70 package; VCEO = 40 V, hFE = 100–300, fT = 300 MHz - higher speed but lower voltage rating | Preferred in high-frequency oscillator or RF detector circuits where 40 V suffices | Choose MMBT3904LT1G only if system voltage stays below 40 V and bandwidth >100 MHz is needed |
Compared with BC846BWT1G, BC846AWT1G offers tighter hFE control for predictable biasing; versus MMBT3904LT1G, it trades 200 MHz extra fT for +25 V robustness - making BC846AWT1G optimal for 48 V industrial signal chains requiring long-term gain stability.
Availability
BC846AWT1G is available at Aetrix Electronics and suitable for industrial I/O modules, automotive LED driver circuits, and portable audio preamplifiers requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for BC846AWT1G 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BC846AWT1G belongs to onsemi's BC846/847/848 family of general-purpose NPN transistors designed for reliable, cost-effective amplification and switching in space-constrained surface-mount applications.
FAQ
What is the maximum collector-emitter voltage rating for BC846AWT1G?
The BC846AWT1G has a maximum collector-emitter voltage (VCEO) rating of 65 V, verified per onsemi's datasheet Rev. 13. This allows safe operation in 48 V industrial systems with margin for transient spikes. Exceeding this voltage risks avalanche breakdown and permanent device failure. Always derate for temperature and reliability - e.g., limit to 52 V at +125 °C junction temperature.
Is BC846AWT1G suitable for automotive applications?
Yes, BC846AWT1G is AEC-Q101 qualified and PPAP capable, as confirmed in the official onsemi datasheet. It meets automotive stress tests including temperature cycling, humidity, and mechanical shock. The "S" and "NSV" prefix variants (e.g., SBC846AWT1G) are designated for automotive use, but the standard BC846AWT1G itself carries full qualification - making it appropriate for body control modules, lighting drivers, and sensor interfaces in passenger vehicles.
What is the DC current gain (hFE) range for BC846AWT1G at typical operating conditions?
At IC = 10 mA and VCE = 5 V, the BC846AWT1G exhibits hFE between 110 and 220, per the "BC846A" row in the Electrical Characteristics table. This binning ensures consistent gain behavior across production lots. For precision biasing, use the typical value of 180 - but design circuits to function correctly across the full min/max range to ensure robustness.
Does BC846AWT1G have a Pb-free and RoHS-compliant package?
Yes, BC846AWT1G is explicitly marked as Pb-free and RoHS compliant in the onsemi datasheet, with halogen-free and BFR-free construction. The "G" suffix in the part number denotes Pb-free packaging, and the device meets EU Directive 2011/65/EU. This makes BC846AWT1G suitable for environmentally regulated markets including the EU, China, and South Korea without requiring exemptions.
What is the thermal resistance (RJA) of BC846AWT1G on a standard FR-5 board?
The BC846AWT1G has a thermal resistance of 620 °C/W (junction-to-ambient) when mounted on an FR-5 board at TA = 25 °C, as specified in the Thermal Characteristics table. This value assumes a 1.0 × 0.75 × 0.062 inch board per Note 1. To maintain TJ ≤ 150 °C, power dissipation must stay below 161 mW at 70 °C ambient - requiring careful layout and potential derating in enclosed or high-temperature environments.
BC846AWT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 110 @ 2mA, 5V
- Power - Max:
- 150 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3 (SOT323)
BC846AWT1G FAQ
1.How can I place an order for BC846AWT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846AWT1G 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 BC846AWT1G reliable?
The price and inventory of BC846AWT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846AWT1G is usually 5 days.
3.What payment methods are accepted for BC846AWT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846AWT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846AWT1G?
BC846AWT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846AWT1G 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 BC846AWT1G?
For technical support, including BC846AWT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846AWT1G requirements.
6.How does Aetrix verify that BC846AWT1G is sourced from the original manufacturer or authorized distributors?
All BC846AWT1G 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 BC846AWT1G meets industry standards.
7.What is the process for return or replacement of BC846AWT1G?
All BC846AWT1G units undergo pre-shipment inspection (PSI). If there is an issue with BC846AWT1G, 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 BC846AWT1G part is unused and in its original packaging.
Return procedure for BC846AWT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846AWT1G Tags
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