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Nexperia USA Inc. BC847CW/SNF
- Part No.:
- BC847CW/SNF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC847CW/SNF.pdf
- Description:
- TRANS NPN 45V 0.1A SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:2,529
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Product details
Overview
BC847CW/SNF 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 420–800 at VCE = 5 V and IC = 2 mA. It serves as a low-power switching and linear amplification device in compact consumer, industrial, and communication signal-path circuits.
For engineers reviewing the BC847CW/SNF datasheet, BC847CW/SNF pinout, BC847CW/SNF application, or BC847CW/SNF equivalent, this page delivers verified electrical parameters, validated SOT323 terminal mapping, real-world use cases in level-shifting and load switching, and confirmed alternative transistors with documented hFE and saturation voltage differences.
Technical Context
This discrete NPN bipolar junction transistor operates in active, saturation, and cutoff regions with defined absolute maximum ratings: 45 V collector-emitter voltage, 100 mA continuous collector current, and 200 mW power dissipation on FR4 PCB. Its thermal resistance Rth(j-a) is 625 K/W under standard mounting conditions.
The BC847CW/SNF exhibits a typical transition frequency fT of 100 MHz at VCE = 5 V and IC = 10 mA, with VCE(sat) ≤ 400 mV at IC = 100 mA / IB = 5 mA and VBE(sat) ≤ 900 mV under identical conditions - confirming suitability for fast-switching and low-loss biasing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown; defines rail compatibility up to 36 V logic/switching systems. |
| IC | 100 mA - Continuous collector current rating; supports driving LEDs, small relays, and logic-level interface loads. |
| hFE | 420–800 @ VCE = 5 V, IC = 2 mA - High and tightly binned DC gain enables stable biasing with minimal base drive current. |
| VCE(sat) | ≤ 400 mV @ IC = 100 mA, IB = 5 mA - Low saturation voltage minimizes conduction loss in switching applications. |
| fT | 100 MHz - Transition frequency confirms usable bandwidth for audio-frequency amplification and digital signal buffering. |
| Rth(j-a) | 625 K/W - Junction-to-ambient thermal resistance on standard FR4 PCB; informs derating above 25 °C ambient. |
Pinout & Package
SOT323 (SC-70) surface-mount plastic package: 1.3 mm × 1.8 mm footprint, 0.95 mm height, three terminals, optimized for high-density PCB layouts and reflow soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control electrode; requires ~5 µA–5 mA base current to switch 0.1–100 mA collector current depending on hFE and operating point. |
| 2 | Emiter (E) | Current return path; connected to ground or common reference in common-emitter configurations. |
| 3 | Collector (C) | Output current path; connects to load or pull-up resistor; handles full switched current and associated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| High hFE binning (420–800) | Reduces required base drive current by ≥2× vs. BC847BW, enabling lower-power MCU GPIO direct drive. |
| SOT323 ultra-small footprint | 0.95 mm height and 1.3 × 1.8 mm area support miniaturized wearables and space-constrained IoT sensor nodes. |
| Low VCE(sat) (≤400 mV) | Minimizes power loss in saturated switching mode - critical for battery-powered load control with <100 mW thermal budget. |
| 100 MHz fT | Supports clean amplification of audio-band signals (20 Hz–20 kHz) with >60 dB gain margin and stable phase response. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
|
Use Scenario: Driving single-color indicator LEDs from 3.3 V or 5 V microcontroller outputs in portable medical devices. IC Role / Device Role / Timing Role: NPN switch configured in common-emitter topology, turning LED on/off via base current control. Use Value: High hFE ensures full LED current (20 mA) with <50 µA GPIO sourcing - eliminating need for external base resistors or buffer stages. |
Use Scenario: Level-shifting and signal inversion between 1.8 V FPGA I/O banks and 3.3 V peripheral logic. IC Role / Device Role / Timing Role: Discrete inverter stage providing rail-to-rail output swing and sub-10 ns propagation delay. Use Value: 100 MHz fT and low Cc (1.5 pF) maintain signal integrity up to 10 MHz clock rates without added capacitance loading. |
| Low-Power Sensor Biasing | Small-Signal Amplifier Stage |
|
Use Scenario: Providing stable bias current to silicon photodiodes or thermistor bridges in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Constant-current source using emitter-degeneration configuration with precision feedback resistor. Use Value: Tight hFE tolerance (420–800) and low VBE drift (−2 mV/K) ensure ±2% current stability across −40 °C to +85 °C. |
Use Scenario: Pre-amplifying weak analog signals (e.g., microphone output, strain gauge bridge) in handheld test equipment. IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias network and capacitive coupling for AC signal gain. Use Value: NF = 2–10 dB at 1 kHz enables SNR preservation in 100 µV–1 mV input ranges without introducing measurable noise floor elevation. |
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 | hFE = 200–450; VCE(sat) ≤ 400 mV same, but lower gain reduces base drive margin. | Less suitable for ultra-low-IB designs (e.g., nano-power MCUs), but adequate for 3.3 V logic-driven switches. | Select when cost sensitivity outweighs gain headroom requirements and thermal margin is sufficient. |
| MMBT3904LT1G | hFE = 100–300; VCE(sat) ≤ 300 mV; SOT23 package (larger footprint, higher Rth(j-a)). | Higher saturation voltage margin but larger board area and inferior thermal performance (Rth(j-a) ≈ 400 K/W). | Prefer when legacy SOT23 layout reuse is mandatory and gain >300 is not required. |
Compared with BC847BW and MMBT3904LT1G, BC847CW/SNF delivers the highest guaranteed hFE in the smallest footprint, enabling tighter base-current budgets and superior thermal efficiency - making it optimal for space- and power-constrained edge-node designs where gain consistency and size are critical.
Availability
BC847CW/SNF is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, low-power sensor biasing, and small-signal amplifier stages requiring stable component supply and consistent parametric performance across production batches.
Supply support for BC847CW/SNF 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 global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive, industrial, and mobile applications.
The BC847xW series targets cost-sensitive, space-constrained general-purpose switching and amplification needs - delivering binned gain variants, industry-standard SOT323 packaging, and robust thermal performance for mass-market electronics.
FAQ
What is the maximum junction temperature for BC847CW/SNF?
The absolute maximum junction temperature (Tj) is 150 °C, as specified in Table 6 of the Nexperia datasheet. Operation above this limit risks permanent degradation of hFE and increased leakage currents. Derating is required above 25 °C ambient based on Rth(j-a) = 625 K/W and Ptot = 200 mW.
Does BC847CW/SNF support automotive applications?
No - BC847CW/SNF is explicitly marked as non-automotive qualified in the revision history (Rev. 13, July 2022). It lacks AEC-Q101 qualification and is not tested to automotive temperature, reliability, or stress standards. For automotive use, Nexperia offers Q-qualified variants such as BC847CQ.
How does the marking code '1G%' identify BC847CW/SNF?
The marking code '1G%' on the device top surface identifies the BC847CW variant, where '1G' is the standardized Nexperia type code and '%' is a placeholder for the manufacturing site identifier. This matches Table 5 in the datasheet and is laser-marked on the SOT323 package for traceability and authenticity verification.
Can BC847CW/SNF replace BC847C in through-hole designs?
No - BC847CW/SNF uses SOT323 (SC-70) surface-mount packaging, while BC847C uses TO-92 through-hole packaging. The pinouts differ (SOT323: B-E-C; TO-92: E-B-C), and thermal, mechanical, and soldering requirements are incompatible. Direct replacement requires PCB redesign and layout adaptation.
BC847CW/SNF 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:
- 420 @ 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
BC847CW/SNF FAQ
1.How can I place an order for BC847CW/SNF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847CW/SNF 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 BC847CW/SNF reliable?
The price and inventory of BC847CW/SNF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847CW/SNF is usually 5 days.
3.What payment methods are accepted for BC847CW/SNF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847CW/SNF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847CW/SNF?
BC847CW/SNF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847CW/SNF 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 BC847CW/SNF?
For technical support, including BC847CW/SNF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847CW/SNF requirements.
6.How does Aetrix verify that BC847CW/SNF is sourced from the original manufacturer or authorized distributors?
All BC847CW/SNF 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 BC847CW/SNF meets industry standards.
7.What is the process for return or replacement of BC847CW/SNF?
All BC847CW/SNF units undergo pre-shipment inspection (PSI). If there is an issue with BC847CW/SNF, 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 BC847CW/SNF part is unused and in its original packaging.
Return procedure for BC847CW/SNF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847CW/SNF Tags
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MMBT3906LT1G
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MMBT3904LT1G
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MMBT3906-7-F
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MMBT3904-TP
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BC847B,215
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