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Nexperia USA Inc. BC847CW/SNX
- Part No.:
- BC847CW/SNX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC847CW/SNX.pdf
- Description:
- TRANS NPN 45V 0.1A SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:5,973
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Product details
Overview
BC847CW/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 420–800 at VCE = 5 V and IC = 2 mA. It serves as a low-power switching or small-signal amplification device in compact consumer and industrial PCBs.
For engineers reviewing the BC847CW/SNX datasheet, BC847CW/SNX pinout, BC847CW/SNX application, or BC847CW/SNX equivalent, this part is selected for cost-sensitive, space-constrained designs requiring stable hFE performance across -55 °C to +150 °C ambient, verified thermal resistance (Rth(j-a) = 625 K/W), and SC-70 soldering compatibility.
Technical Context
This discrete NPN bipolar junction transistor operates in active, saturation, and cutoff regions with defined absolute maximum ratings: VCBO = 50 V, VEBO = 6 V, Ptot = 200 mW at Tamb ≤ 25 °C, and Tj up to 150 °C. Its hFE binning (C-grade) ensures tighter gain consistency versus BC847AW/BW variants.
Key electrical behaviors include VCE(sat) ≤ 400 mV at IC = 100 mA / IB = 5 mA, VBE(sat) ≤ 900 mV under same conditions, and fT ≥ 100 MHz at VCE = 5 V / IC = 10 mA - confirming suitability for low-frequency switching and audio-range amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; defines safe operating voltage headroom in low-voltage logic-level switching. |
| IC | 100 mA - Continuous collector current rating; supports load switching up to ~100 mA DC or pulsed (ICM = 200 mA). |
| hFE | 420–800 @ VCE = 5 V, IC = 2 mA - High and tightly binned DC current gain enables predictable base drive sizing in amplifier or switch bias networks. |
| VCE(sat) | ≤ 400 mV @ IC = 100 mA, IB = 5 mA - Low saturation voltage minimizes power loss and heating during on-state operation. |
| Rth(j-a) | 625 K/W - Junction-to-ambient thermal resistance on FR4 PCB; informs derating curves for sustained power dissipation. |
| fT | ≥ 100 MHz @ VCE = 5 V, IC = 10 mA - Transition frequency confirms usable bandwidth for audio and low-speed digital signal conditioning. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, 3-terminal leadframe with gull-wing leads; optimized for reflow and wave soldering per IPC-7351B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires series resistor to limit IB and ensure reliable saturation or linear operation. |
| 2 | Emitter (E) | Common reference terminal; connected to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | Output current sink node; interfaces with load (e.g., LED, relay coil, logic gate input) in switching applications. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE bins (W/A/B/C) | Enables precise gain matching across production batches - C-bin (420–800) supports high-gain amplifier stages with minimal base drive. |
| SOT323 (SC-70) package | Reduces board area by >50% vs. SOT23; compatible with standard 0.5 mm pitch reflow footprints and automated placement. |
| VEBO = 6 V | Allows safe reverse-biasing of base-emitter junction during level-shifting or protection circuit operation. |
| ICM = 200 mA (pulse) | Supports short-duration surge loads (tp ≤ 1 ms), enabling use in pulse-width modulated drivers or transient event handling. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving single-color indicator LEDs from 3.3 V or 5 V microcontroller outputs. IC Role / Device Role / Timing Role: Low-side switch controlling LED current path to ground. Use Value: VCE(sat) ≤ 400 mV ensures <100 mW dissipation at 100 mA, minimizing self-heating and preserving GPIO voltage margin. |
Use Scenario: Extending digital output capability of resource-constrained MCUs (e.g., STM32F0, PIC16) via discrete transistor buffers. IC Role / Device Role / Timing Role: Digital buffer/inverter stage translating weak MCU output into robust 100 mA capable drive. Use Value: hFE ≥ 420 allows <230 µA base current to fully saturate at 100 mA collector load - compatible with 4 mA GPIO limits. |
| Audio Pre-amplifier Stage | Power Supply Enable Switch |
|
Use Scenario: Low-noise voltage amplification in portable audio front-ends (e.g., electret microphone biasing). IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration. Use Value: NF ≤ 10 dB at 1 kHz / 200 µA enables clean gain without introducing audible hiss in battery-powered devices. |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., 3.3 V sensor supply) under MCU control. IC Role / Device Role / Timing Role: High-side or low-side enable switch in LDO or DC-DC output path. Use Value: VCEO = 45 V and Tj = 150 °C support reliable operation in thermally dense power management subsystems. |
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 |
|---|---|---|---|
| BC847CMTF (onsemi) | Same SOT323 package; hFE = 420–800 but specified at IC = 10 mA (not 2 mA); VCE(sat) max = 600 mV @ IC/IB = 100/5 mA. | Higher VCE(sat) reduces efficiency in high-current switching; better suited for linear amplification than saturated switching. | Select when matching onsemi design ecosystems or requiring automotive-qualified (-Q) variants (e.g., BC847CMTFQ). |
| MMBT3904LT1G (onsemi) | SOT23 package (larger footprint); hFE = 100–300 @ IC = 10 mA; VCE(sat) = 300 mV @ IC/IB = 10/1 mA. | Lower gain and larger package reduce board density; higher IC rating (200 mA) suits higher-load applications. | Choose when legacy SOT23 layout reuse is required or when higher continuous current (>100 mA) is needed with moderate gain. |
Compared with BC847CMTF and MMBT3904LT1G, BC847CW/SNX delivers superior gain consistency at low collector currents and smallest footprint among the three - making it optimal for space-constrained, low-power amplification and switching where tight hFE control is critical.
Availability
BC847CW/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 BC847CW/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 global semiconductor expert focused on high-volume, high-reliability discrete, logic, and MOSFET solutions for consumer, industrial, and communications markets.
The BC847xW series targets cost-sensitive, space-constrained applications needing proven general-purpose bipolar performance - emphasizing manufacturability, thermal robustness, and consistent parametric binning in ultra-small packages.
FAQ
What is the maximum junction temperature and how does it affect derating?
The BC847CW/SNX has a maximum junction temperature (Tj) of 150 °C. At ambient temperatures above 25 °C, its total power dissipation must be linearly derated using Rth(j-a) = 625 K/W. For example, at Tamb = 75 °C, maximum allowable Ptot drops to 120 mW to maintain Tj ≤ 150 °C - confirmed in Table 6 and Figure 1 of the datasheet.
Is BC847CW/SNX suitable for automotive applications?
No - BC847CW/SNX is explicitly marked as non-automotive qualified in the revision history (Section 13). It lacks AEC-Q101 qualification, and Nexperia states that automotive alternatives must be selected from their -Q product line (e.g., BC847CW-Q). Use only in consumer, industrial, or commercial systems.
How does the hFE binning differ between BC847CW and BC847BW?
BC847CW specifies hFE = 420–800 at VCE = 5 V and IC = 2 mA, while BC847BW is 200–450 under identical conditions. The C-bin offers higher and wider gain range, enabling lower base drive requirements and improved stability in low-current amplifier stages - validated in Tables 2 and 8.
Can BC847CW/SNX replace BC847B in existing SOT323 layouts?
Yes - both share identical SOT323 (SC-70) mechanical dimensions, pinout (B-E-C), and solder footprint. However, due to higher hFE, BC847CW may exhibit earlier saturation or altered bias point in linear circuits; verify base resistor values and thermal performance under worst-case IC conditions.
BC847CW/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:
- 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/SNX FAQ
1.How can I place an order for BC847CW/SNX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847CW/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 BC847CW/SNX reliable?
The price and inventory of BC847CW/SNX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847CW/SNX is usually 5 days.
3.What payment methods are accepted for BC847CW/SNX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847CW/SNX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847CW/SNX?
BC847CW/SNX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847CW/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 BC847CW/SNX?
For technical support, including BC847CW/SNX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847CW/SNX requirements.
6.How does Aetrix verify that BC847CW/SNX is sourced from the original manufacturer or authorized distributors?
All BC847CW/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 BC847CW/SNX meets industry standards.
7.What is the process for return or replacement of BC847CW/SNX?
All BC847CW/SNX units undergo pre-shipment inspection (PSI). If there is an issue with BC847CW/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 BC847CW/SNX part is unused and in its original packaging.
Return procedure for BC847CW/SNX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847CW/SNX Tags
-
MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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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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