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onsemi BC846AWT1
- Part No.:
- BC846AWT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC846AWT1.pdf
- Description:
- TRANS NPN 65V 0.1A SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,042
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Product details
Overview
BC846AWT1 from onsemi is an NPN silicon general-purpose transistor in SC−70 (SOT−323) package, rated for VCEO = 65 V, IC = 100 mA, and hFE = 110–220 at IC = 10 mA / VCE = 5 V. It delivers low-saturation performance (VCE(sat) ≤ 0.25 V) and fT = 100 MHz, suited for signal amplification and switching in compact consumer and industrial PCBs.
For engineers reviewing the BC846AWT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 65 V VCEO, SC−70 thermal resistance (RJA = 833 °C/W), DC current gain range, and Pb-free SOT−323 footprint compatibility with space-constrained designs.
Technical Context
The BC846AWT1 operates as a discrete NPN bipolar junction transistor optimized for linear amplification and digital switching. Its design targets low-power surface-mount applications where board area and thermal dissipation are constrained, with validated operation from −55 °C to +150 °C junction temperature.
It exhibits defined saturation behavior (VCE(sat) = 0.25 V max at IC/IB = 10) and small-signal linearity (fT = 100 MHz at IC = 10 mA, VCE = 5 V), supported by Cobo = 4.5 pF and NF = 10 dB at 1 kHz - parameters confirmed across the BC846A variant group.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - maximum collector-emitter voltage before breakdown; enables use in 48 V rail and higher-voltage interface stages. |
| IC Continuous | 100 mA - continuous collector current rating; supports medium-gain preamp and driver-stage loads. |
| hFE | 110–220 at IC = 10 mA, VCE = 5 V - guaranteed DC current gain range for stable biasing in amplifier designs. |
| VCE(sat) | ≤ 0.25 V at IC = 10 mA, IB = 0.5 mA - low saturation voltage reduces power loss in switching applications. |
| fT | 100 MHz - unity-gain frequency confirming usable bandwidth up to ~10 MHz for small-signal amplification. |
| RJA | 833 °C/W - junction-to-ambient thermal resistance on FR-5 board; informs derating above 25 °C ambient. |
Pinout & Package
BC846AWT1 uses the SC−70 (SOT−323) package - a 3-pin, surface-mount, plastic-molded case (Case 419, Style 3) with 1.24 mm body width and 0.65 mm lead pitch. Total device dissipation is 150 mW at TA = 25 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased base-emitter junction; requires current-limited drive to achieve target IC. |
| 2 | Emitter | Current return path; connected to ground or low-impedance node in common-emitter configuration. |
| 3 | Collector | Output current terminal; connects to load or next stage; withstands up to 65 V relative to emitter. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free construction | Complies with RoHS Directive 2011/65/EU; suitable for lead-free reflow soldering per J-STD-020. |
| Low-profile SOT−323 package | 1.24 mm × 2.10 mm footprint enables high-density routing in portable and wearable electronics. |
| Guaranteed hFE binning (A grade) | 110–220 hFE range ensures predictable DC bias stability without individual unit trimming. |
| 100 MHz fT | Supports audio-frequency amplification and low-speed digital signal switching up to ~10 MHz. |
Applications
| Audio Pre-amplifier Stage | LED Driver Switch |
|---|---|
|
Use Scenario: Amplifying weak microphone or sensor signals prior to ADC sampling in battery-powered voice recorders. IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with fixed bias network. Use Value: 110–220 hFE and 100 MHz fT ensure sufficient gain-bandwidth for 20 Hz–20 kHz audio without instability. |
Use Scenario: Driving discrete LEDs in status indicator circuits on industrial control panels. IC Role / Device Role / Timing Role: Digital switch controlling LED current via saturated base drive. Use Value: VCE(sat) ≤ 0.25 V minimizes power loss and heat rise in 20–50 mA LED loads. |
| Level Translation Interface | Signal Conditioning Node |
|
Use Scenario: Translating 3.3 V logic outputs to 5 V or 12 V domains in mixed-voltage microcontroller systems. IC Role / Device Role / Timing Role: Active pull-up/pull-down switch enabling bidirectional level shifting. Use Value: 65 V VCEO and 100 mA IC support safe operation across multiple supply rails without external protection. |
Use Scenario: Buffering analog sensor outputs (e.g., thermistor, photodiode) before filtering or multiplexing. IC Role / Device Role / Timing Role: Emitter-follower configured for impedance transformation and noise isolation. Use Value: Low VBE(on) (580–700 mV) and tight VBE(sat) spec enable accurate DC-coupled buffering with minimal offset. |
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 |
|---|---|---|---|
| BC846BWT1 | Higher hFE range (200–450), same VCEO/IC/package | Better for low-base-drive amplifiers requiring higher gain stability at low IC | Select BC846BWT1 when circuit sensitivity to hFE variation demands tighter gain control. |
| MMBT3904LT1G | Same SOT−23 package (not SOT−323); VCEO = 40 V, hFE = 100–300, RJA = 300 °C/W | Higher thermal efficiency but lower voltage rating; requires PCB layout change | Choose MMBT3904LT1G only if board redesign accommodates SOT−23 and system voltage stays ≤ 40 V. |
Compared with BC846BWT1 and MMBT3904LT1G, the BC846AWT1 offers the highest VCEO in its family and optimal thermal-area trade-off for ultra-compact layouts-making it preferred for 48–60 V interface stages where SOT−323 footprint is mandatory.
Availability
BC846AWT1 is available at Aetrix Electronics and suitable for audio pre-amplifier stages, LED driver switches, and level translation interfaces requiring stable component supply, consistent hFE binning, and RoHS-compliant SOT−323 packaging.
Supply support for BC846AWT1 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 and sensing solutions for automotive, industrial, cloud, and consumer markets.
The BC846AWT1 belongs to onsemi's BC846/847/848 series of general-purpose NPN transistors, designed specifically for cost-sensitive, space-constrained linear and switching applications in portable and industrial electronics.
FAQ
What is the maximum collector-emitter voltage rating for BC846AWT1?
The BC846AWT1 has a guaranteed VCEO rating of 65 V, verified per JEDEC test conditions (IC = 10 mA). This allows safe operation in 48 V systems and legacy telecom interfaces without additional clamping components. Exceeding this voltage risks irreversible avalanche breakdown in the BC846AWT1.
Does BC846AWT1 support lead-free soldering processes?
Yes, BC846AWT1 is manufactured in a Pb-free package compliant with RoHS Directive 2011/65/EU. It is qualified for standard lead-free reflow profiles (peak temperature ≤ 260 °C, per J-STD-020), and the marking "1A" with "M" indicates Pb-free SOT−323 packaging per onsemi's documentation.
What is the DC current gain (hFE) range specified for BC846AWT1?
The BC846AWT1 is binned to the "A" grade, with hFE guaranteed between 110 and 220 when tested at IC = 10 mA and VCE = 5 V. This range is explicitly defined in the Electrical Characteristics table of the official BC846AWT1/D datasheet and applies to every unit shipped under this part number.
Can BC846AWT1 be used in switching applications?
Yes, BC846AWT1 is suitable for low-speed switching due to its VCE(sat) ≤ 0.25 V at IC/IB = 10 and tON/tOFF performance validated in the BC846 series characterization. It reliably switches loads up to 100 mA with minimal conduction loss, though fT = 100 MHz limits practical edge rates to < 10 MHz.
What is the thermal resistance (RJA) of BC846AWT1 on FR-5 board?
The BC846AWT1 has a specified RJA of 833 °C/W when mounted on a standard FR-5 board at TA = 25 °C. This value is measured per JEDEC JESD51-2 and defines the junction-to-ambient temperature rise per watt of dissipated power - critical for derating calculations in sealed enclosures or elevated ambient environments.
BC846AWT1 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)
BC846AWT1 FAQ
1.How can I place an order for BC846AWT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846AWT1 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 BC846AWT1 reliable?
The price and inventory of BC846AWT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846AWT1 is usually 5 days.
3.What payment methods are accepted for BC846AWT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846AWT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846AWT1?
BC846AWT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846AWT1 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 BC846AWT1?
For technical support, including BC846AWT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846AWT1 requirements.
6.How does Aetrix verify that BC846AWT1 is sourced from the original manufacturer or authorized distributors?
All BC846AWT1 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 BC846AWT1 meets industry standards.
7.What is the process for return or replacement of BC846AWT1?
All BC846AWT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC846AWT1, 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 BC846AWT1 part is unused and in its original packaging.
Return procedure for BC846AWT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846AWT1 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.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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