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Nexperia USA Inc. BC847BW/SNX
- Part No.:
- BC847BW/SNX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC847BW/SNX.pdf
- Description:
- TRANS NPN 45V 0.1A SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:5,178
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Product details
Overview
BC847BW/SNX from Nexperia is an NPN general-purpose transistor in SOT323 (SC-70) package, rated for 45 V VCEO, 100 mA IC, and DC current gain (hFE) of 200–450 at VCE = 5 V, IC = 2 mA. It serves as a low-power switching and amplification device in compact consumer and industrial signal-path circuits.
For engineers reviewing the BC847BW/SNX datasheet, BC847BW/SNX pinout, BC847BW/SNX application, or BC847BW/SNX equivalent, key selection criteria include its 290 typical hFE, 200 mW Ptot at Tamb ≤ 25 °C, SOT323 thermal resistance of 625 K/W, and validated performance across −65 °C to +150 °C ambient range.
Technical Context
This discrete NPN bipolar junction transistor operates in linear or saturated switching modes with VBE(sat) = 900 mV max at IC = 100 mA / IB = 5 mA and VCE(sat) = 400 mV max under same conditions. Its fT = 100 MHz enables use in low-frequency analog amplification and digital logic interfacing up to ~10 MHz.
Thermal design relies on FR4 PCB mounting with single-sided copper; Rth(j-a) = 625 K/W reflects standard footprint limitations. Absolute maximum ratings include VCBO = 50 V, VEBO = 6 V, and Tj = 150 °C - defining safe operating area boundaries for continuous and pulsed operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; defines upper rail limit in low-voltage switch designs. |
| IC | 100 mA - Continuous collector current rating; supports signal-level loads like LED drivers or logic-level translators. |
| hFE | 200–450 - DC current gain range at VCE = 5 V, IC = 2 mA; ensures reliable base drive margin in amplifier bias networks. |
| Ptot | 200 mW - Total power dissipation on FR4 PCB; constrains thermal layout for sustained operation without heatsinking. |
| Rth(j-a) | 625 K/W - Junction-to-ambient thermal resistance; requires careful copper area allocation for >50 mW average power. |
| fT | 100 MHz - Transition frequency; validates suitability for audio preamps and low-speed digital interface buffering. |
| VCE(sat) | 200–400 mV - Saturation voltage at IC = 100 mA / IB = 5 mA; minimizes conduction loss in high-efficiency switching nodes. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.15 mm × 0.45 mm body, 3-terminal leadframe, tin-plated terminations compatible with reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires series resistor to limit IB and ensure saturation or linear operation. |
| 2 | Emitter (E) | Common reference terminal; connects to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | Output current sink node; ties to load (e.g., resistor, LED, or next-stage input) in switching or amplification topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE selections | BC847BW offers 200–450 gain spread, enabling precise bias tuning across production batches without circuit redesign. |
| SOT323 footprint | 0.65 mm pitch, 1.35 mm × 1.15 mm outline - supports high-density PCB layouts and automated placement in space-constrained modules. |
| Wide temperature range | −65 °C to +150 °C operating envelope - suitable for industrial control, automotive cabin electronics, and outdoor sensor nodes. |
| Low VCE(sat) | 200 mV typical at IC/IB = 20 - reduces power loss and self-heating in battery-powered switching applications. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller outputs. IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, sinking current from LED anode to ground. Use Value: Low VCE(sat) ensures <100 mW dissipation per LED channel; hFE ≥ 200 guarantees full saturation with 100 µA base drive. |
Use Scenario: Level-shifting and current boosting for legacy 5 V peripherals connected to 3.3 V MCU I/O pins. IC Role / Device Role / Timing Role: Active-low buffer transistor translating logic states while sourcing/sinking up to 100 mA. Use Value: 100 MHz fT supports clean edge transitions up to 10 MHz; SOT323 allows integration near connector interfaces. |
| Audio Pre-amplifier Stage | Power Supply Enable Switch |
|
Use Scenario: Low-noise voltage amplification of electret microphone output in portable audio devices. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for stable gain and bandwidth. Use Value: NF = 2–10 dB at 1 kHz enables SNR preservation; hFE consistency minimizes gain drift across units. |
Use Scenario: Enabling/disabling 12 V auxiliary rails in embedded systems using MCU-controlled ON/OFF signals. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling PMOS/NMOS gate drive or relay coil current. Use Value: 45 V VCEO accommodates 12 V supply with margin; 200 mW Ptot permits continuous duty-cycle operation. |
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 |
|---|---|---|---|
| BC847B,115 (Nexperia) | SOT23 package; larger footprint (2.9 mm × 1.3 mm), higher Ptot = 250 mW, identical hFE range. | Better thermal handling in moderate-power switching; less suitable for ultra-dense layouts. | Select when board space allows and thermal margin is prioritized over miniaturization. |
| MMBT3904LT1G (onsemi) | SOT23 package; VCEO = 40 V, hFE = 100–300, fT = 300 MHz, lower VCE(sat) = 300 mV typ. | Higher speed but lower voltage headroom; optimized for RF bias and fast-switching logic. | Prefer for high-frequency analog or digital switching where 40 V rating suffices and speed matters. |
Compared with BC847BW/SNX, BC847B,115 trades miniaturization for thermal robustness in SOT23, while MMBT3904LT1G sacrifices voltage margin for higher fT and lower saturation loss - making BC847BW/SNX optimal for cost-sensitive, space-constrained 45 V switching where 100 MHz bandwidth is sufficient.
Availability
BC847BW/SNX is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio pre-amplifier stages, and power supply enable switches requiring stable component supply and consistent hFE binning.
Supply support for BC847BW/SNX 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
Nexperia is a leading semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
The BC847xW series targets cost-effective, space-efficient general-purpose switching and amplification in consumer, industrial, and computing applications - emphasizing consistent parametric binning and SMT manufacturability.
FAQ
What is the maximum continuous collector current for BC847BW/SNX?
The absolute maximum continuous collector current (IC) is 100 mA at Tamb ≤ 25 °C on FR4 PCB with standard footprint. Derating applies above 25 °C ambient: current must be reduced linearly to zero at 150 °C junction temperature, per the thermal resistance of 625 K/W.
Does BC847BW/SNX support automotive applications?
No - BC847BW/SNX is explicitly non-automotive qualified per Nexperia's revision history (Rev. 13, July 2022). It lacks AEC-Q101 qualification and is not tested to automotive temperature, reliability, or stress requirements. For automotive use, select BC847BW-Q series variants.
How does the hFE binning of BC847BW differ from BC847AW and BC847CW?
BC847BW is binned for hFE = 200–450 at VCE = 5 V, IC = 2 mA; BC847AW is 110–220; BC847CW is 420–800. This enables predictable gain matching across production lots without post-manufacture sorting - critical for stable bias in amplifier and switching designs.
Can BC847BW/SNX replace BC847B in existing SOT23 designs?
No direct replacement: BC847BW/SNX uses SOT323 (SC-70), while BC847B uses SOT23. Footprint, pad layout, and thermal performance differ significantly. Migration requires PCB redesign, solder mask adjustment, and validation of thermal rise under load due to higher Rth(j-a) (625 K/W vs ~300 K/W for SOT23).
BC847BW/SNX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- 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):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70
BC847BW/SNX FAQ
1.How can I place an order for BC847BW/SNX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847BW/SNX 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 BC847BW/SNX reliable?
The price and inventory of BC847BW/SNX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847BW/SNX is usually 5 days.
3.What payment methods are accepted for BC847BW/SNX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847BW/SNX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847BW/SNX?
BC847BW/SNX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847BW/SNX 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 BC847BW/SNX?
For technical support, including BC847BW/SNX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847BW/SNX requirements.
6.How does Aetrix verify that BC847BW/SNX is sourced from the original manufacturer or authorized distributors?
All BC847BW/SNX 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 BC847BW/SNX meets industry standards.
7.What is the process for return or replacement of BC847BW/SNX?
All BC847BW/SNX units undergo pre-shipment inspection (PSI). If there is an issue with BC847BW/SNX, 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 BC847BW/SNX part is unused and in its original packaging.
Return procedure for BC847BW/SNX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847BW/SNX Tags
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MMBT3906LT1G
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MMBT3904LT1G
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