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onsemi BC856BWT1
- Part No.:
- BC856BWT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- -
- Datasheet:
-
BC856BWT1.pdf
- Description:
- TRANS PNP GP 65V 100MA SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:180,000
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Product details
Overview
BC856BWT1 from onsemi is a PNP silicon general-purpose transistor in SC-70/SOT-323 package, rated for −65 V VCEO, −100 mA IC, and 150 mW power dissipation, with hFE = 220–475 at −10 mA/−5 V, used in low-power switching and amplification circuits in consumer and industrial electronics.
For engineers reviewing the BC856BWT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated SC-70 terminal mapping, automotive-grade AEC-Q101 qualification status, and direct alternative part comparisons for reliable component selection in surface-mount amplifier and switch designs.
Technical Context
This PNP bipolar junction transistor operates in active and saturation regions with VCE(sat) = −0.3 V at −10 mA/−0.5 mA and VBE(sat) = −0.7 V under same conditions. Its fT = 100 MHz supports RF-capable small-signal amplification up to VHF band.
Designed for low-power surface-mount applications, it features Cob = 4.5 pF at −10 V and NF = 10 dB at 1 kHz, enabling noise-sensitive analog front-ends. Thermal resistance RJA = 883 °C/W reflects its FR-5 board derating behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V - Maximum collector-emitter voltage before breakdown; defines safe operating voltage headroom in PNP switching rails. |
| IC | −100 mA - Continuous collector current rating; sets maximum load drive capability in linear or saturated operation. |
| hFE | 220–475 - DC current gain range at −10 mA/−5 V; determines base drive sizing for predictable switching or amplification gain. |
| fT | 100 MHz - Current-gain bandwidth product; confirms suitability for VHF small-signal amplification and fast-switching applications. |
| Cob | 4.5 pF - Output capacitance at −10 V reverse bias; impacts high-frequency response and stability in tuned circuits. |
| PD | 150 mW - Total device dissipation on FR-5 board; defines thermal limits for PCB layout and ambient temperature derating. |
Pinout & Package
SC-70/SOT-323 package (Case 419, Style 3) with 3-pin surface-mount footprint, 1.3 mm × 0.8 mm body size, and 0.65 mm pitch; optimized for space-constrained low-power PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Current-controlled input node; requires ≤−0.5 mA drive for full saturation at −10 mA collector load. |
| 2 | Emitter | PNP source terminal; connects to higher potential rail (e.g., VCC) in common-emitter configurations. |
| 3 | Collector | Output current sink node; delivers −100 mA max to load tied between collector and ground or lower potential. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including body control modules and sensor interfaces requiring PPAP compliance. |
| Pb-free, Halogen-free, RoHS compliant | Meets global environmental regulations without compromising solderability or long-term reliability in reflow assembly. |
| VCE(sat) = −0.3 V @ −10 mA/−0.5 mA | Minimizes conduction loss and self-heating in battery-powered switching applications such as LED drivers and logic-level translators. |
| hFE min = 220 @ −10 mA/−5 V | Enables stable biasing with low base current overhead, reducing quiescent power in always-on signal conditioning stages. |
| SC-70 thermal resistance RJA = 883 °C/W | Supports thermal-aware layout with minimal copper pour; derates to ~90 mW at 70°C ambient per JEDEC JESD51-2. |
Applications
| Automotive Body Control | Portable Audio Amplifiers |
|---|---|
|
Use Scenario: Driving door lock actuators and interior lighting relays in 12 V vehicle systems. IC Role / Device Role / Timing Role: PNP switch controlling ground-return loads via microcontroller GPIO. Use Value: Low VCE(sat) ensures <100 mW dissipation during sustained actuation, extending relay coil life and reducing thermal stress. |
Use Scenario: Input stage preamplifier in battery-powered headphone amps and portable radios. IC Role / Device Role / Timing Role: Small-signal Class-A amplifier with 100 MHz fT preserving audio fidelity up to 20 kHz. Use Value: 10 dB noise figure at 1 kHz enables clean signal gain without introducing audible hiss in low-level analog paths. |
| Industrial Sensor Signal Conditioning | Consumer Power Management |
|
Use Scenario: Level-shifting and buffering output of NTC thermistors and Hall-effect sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Emitter-follower buffer isolating sensitive analog sensors from noisy digital backplanes. Use Value: Stable hFE across −55°C to +125°C ensures consistent gain calibration over wide industrial temperature ranges. |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., USB peripherals, display backlight) in smart home hubs. IC Role / Device Role / Timing Role: Low-side enable switch controlled by MCU with fast turn-off due to low Cob. Use Value: 4.5 pF Cob minimizes capacitive coupling into adjacent high-speed data lines, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857BWT1G | VCEO = −45 V (vs. −65 V); otherwise identical hFE, package, and pinout. | Suitable where system rail voltage ≤40 V; not recommended for 60 V automotive battery surge environments. | Select BC857BWT1G only if design operates below −45 V collector-emitter swing and requires tighter hFE binning consistency. |
| MMBT3906LT1G | Same SC-70 package but hFE = 100–300 (min/max), VCEO = −40 V, and fT = 250 MHz. | Better high-frequency performance but lower voltage margin; less suitable for 12 V/24 V automotive transients. | Choose MMBT3906LT1G when prioritizing RF gain over breakdown safety margin, e.g., in RF detector stages. |
Compared with BC856BWT1, BC857BWT1G trades 20 V breakdown margin for slightly improved hFE consistency, while MMBT3906LT1G offers higher fT but reduced VCEO-making BC856BWT1 optimal for robust 60 V-class switching where reliability trumps speed.
Availability
BC856BWT1 is available at Aetrix Electronics and suitable for automotive body control, portable audio amplifiers, industrial sensor interfaces, and consumer power management requiring stable component supply and AEC-Q101 traceability.
Supply support for BC856BWT1 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 is a global semiconductor supplier specializing in energy-efficient, high-reliability components for automotive, industrial, cloud, and consumer markets.
The BC856BWT1 belongs to onsemi's general-purpose bipolar transistor family designed for cost-effective, space-efficient switching and amplification in surface-mount applications demanding AEC-Q101 compliance.
FAQ
What is the maximum collector-emitter voltage rating for BC856BWT1?
The BC856BWT1 has a maximum collector-emitter voltage (VCEO) rating of −65 V at TA = 25°C. This rating defines the absolute upper limit for voltage applied between collector and emitter with base open, and must be derated at elevated temperatures per the datasheet thermal curves. Exceeding −65 V risks irreversible breakdown and device failure. The BC856BWT1 datasheet specifies this value in the Maximum Ratings table on page 1.
Is BC856BWT1 suitable for automotive applications?
Yes, BC856BWT1 is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including body electronics, lighting control, and sensor interfaces. The S-prefix variant (SBC856BWT1G*) explicitly denotes automotive-grade traceability and process controls. Its −65 V VCEO, −100 mA IC, and operation across −55°C to +150°C ensure robustness against automotive load-dump transients and under-hood thermal stress.
What is the pin configuration of BC856BWT1 in the SC-70 package?
The BC856BWT1 uses SC-70/SOT-323 package (Case 419, Style 3) with Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This pinout is confirmed in the Marking Diagram and Mechanical Case Outline sections of the official onsemi datasheet (BC856BWT1/D, Rev. 6). It is not interchangeable with Style 6 or Style 7 variants that swap emitter/base positions.
What is the typical DC current gain (hFE) of BC856BWT1 at standard test conditions?
The BC856BWT1 exhibits hFE = 220–475 at IC = −10 mA and VCE = −5.0 V, per the Electrical Characteristics table on page 2 of the datasheet. This range reflects the B-grade binning; minimum guaranteed hFE is 220, supporting predictable base drive design for switching and amplification without margin overdesign.
Does BC856BWT1 have lead-free and RoHS-compliant packaging?
Yes, BC856BWT1 is Pb-free, halogen-free/BFR-free, and RoHS compliant, as stated in the Features section of the onsemi datasheet. The "G" suffix in BC856BWT1G denotes the Pb-free package, and the device meets EU RoHS Directive 2011/65/EU requirements. This ensures compatibility with modern reflow soldering processes and environmental compliance for global electronics manufacturing.
BC856BWT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- -
- Frequency - Transition:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
BC856BWT1 FAQ
1.How can I place an order for BC856BWT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856BWT1 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 BC856BWT1 reliable?
The price and inventory of BC856BWT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856BWT1 is usually 5 days.
3.What payment methods are accepted for BC856BWT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856BWT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856BWT1?
BC856BWT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856BWT1 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 BC856BWT1?
For technical support, including BC856BWT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856BWT1 requirements.
6.How does Aetrix verify that BC856BWT1 is sourced from the original manufacturer or authorized distributors?
All BC856BWT1 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 BC856BWT1 meets industry standards.
7.What is the process for return or replacement of BC856BWT1?
All BC856BWT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC856BWT1, 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 BC856BWT1 part is unused and in its original packaging.
Return procedure for BC856BWT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856BWT1 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
onsemi
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
onsemi
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