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Nexperia USA Inc. BC847BW/SNF
- Part No.:
- BC847BW/SNF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC847BW/SNF.pdf
- Description:
- TRANS NPN 45V 0.1A SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:4,490
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Product details
Overview
BC847BW/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 200–450 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 BC847BW/SNF datasheet, BC847BW/SNF pinout, BC847BW/SNF application, or BC847BW/SNF equivalent, key selection criteria include its SOT323 footprint compatibility, guaranteed hFE binning (B-grade), thermal resistance (Rth(j-a) = 625 K/W on FR4), and non-automotive qualification status.
Technical Context
This discrete NPN bipolar junction transistor operates in linear or saturated switching modes with VCEO = 45 V, VCB0 = 50 V, and VEB0 = 6 V absolute maximum ratings. Its base-emitter saturation voltage is 900 mV typical at IC = 100 mA / IB = 5 mA, and collector-emitter saturation voltage is 200–400 mV under the same conditions.
Thermal performance is defined for FR4 PCB mounting with single-sided copper: Rth(j-a) = 625 K/W, Tj(max) = 150 °C, and Ptot = 200 mW at Tamb ≤ 25 °C. Transition frequency fT is 100 MHz at VCE = 5 V, IC = 10 mA, and f = 100 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with open base; defines upper rail limit in low-voltage switching stages. |
| IC | 100 mA continuous - Absolute max DC collector current; supports signal-level loads like LED drivers or logic-level interface buffers. |
| hFE | 200–450 at VCE = 5 V, IC = 2 mA - B-grade binning ensures predictable current amplification in bias networks and analog gain stages. |
| VCE(sat) | 200–400 mV at IC = 100 mA, IB = 5 mA - Low saturation voltage enables efficient switching with minimal conduction loss in 3.3 V/5 V systems. |
| Rth(j-a) | 625 K/W on FR4 PCB - Thermal resistance determines junction temperature rise; requires layout-aware copper area for sustained 100 mA operation. |
| fT | 100 MHz - Transition frequency supports audio-frequency amplification and digital signal edge sharpening up to ~10 MHz. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, 3-terminal leadless design optimized for high-density PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires current-limited drive (e.g., 1–5 mA) to achieve full saturation at 100 mA collector load. |
| 2 | Emitter (E) | Reference node for bias network; connected to ground or low-impedance return path in common-emitter configurations. |
| 3 | Collector (C) | Output terminal; carries switched load current; routed with adequate trace width to handle 100 mA without excessive heating. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE gain bins (W/A/B/C) | Enables precise bias point selection: BC847BW's 200–450 range reduces variation in amplifier Q-point or switch threshold across production lots. |
| SOT323 (SC-70) package | 0.95 mm profile and 1.35 mm × 1.75 mm footprint support ultra-compact designs where space is constrained, such as wearables and sensor nodes. |
| Non-automotive qualification | Meets industrial and commercial reliability standards but excludes AEC-Q101 stress testing; not intended for safety-critical vehicle subsystems. |
| Low VBE(sat) | 900 mV typical at IC = 100 mA / IB = 5 mA - Reduces base drive power and eases microcontroller GPIO sourcing requirements. |
Applications
| LED Indicator Driver | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving single-color status LEDs from 3.3 V or 5 V MCU outputs in portable instrumentation. IC Role / Device Role / Timing Role: NPN switch controlling LED anode-to-rail current path; base driven directly by MCU GPIO. Use Value: VCE(sat) ≤ 400 mV ensures >90% LED forward voltage utilization; hFE ≥ 200 allows 5 mA base drive to switch 100 mA LED load. |
Use Scenario: Extending limited GPIO count to control multiple peripheral enable lines or reset signals. IC Role / Device Role / Timing Role: Low-side switch enabling/disabling power rails or pull-down paths for I²C/SPI peripherals. Use Value: Fast turn-on (fT = 100 MHz) and low VBE(sat) ensure clean, sub-microsecond enable timing without bus contention. |
| Audio Pre-amplifier Stage | Level-Shifting Interface |
|
Use Scenario: Small-signal amplification of microphone or sensor outputs in battery-powered audio front-ends. IC Role / Device Role / Timing Role: Common-emitter amplifier with emitter degeneration resistor for stable gain and linearity. Use Value: hFE = 290 typ. provides consistent β-dependent gain; noise figure NF = 2–10 dB at 1 kHz supports SNR-sensitive analog chains. |
Use Scenario: Translating 1.8 V logic outputs to 3.3 V or 5 V input thresholds in mixed-voltage SoC interfaces. IC Role / Device Role / Timing Role: Active pull-up level shifter using emitter-follower or common-base configuration. Use Value: VCEO = 45 V and VCB0 = 50 V allow safe operation across 1.8–5 V domain boundaries without clamping diodes. |
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 |
|---|---|---|---|
| BC847BMTF | Same hFE bin (200–450), identical SOT323 package, but marked "MTF" indicating different tape-and-reel packaging and RoHS compliance version. | No functional difference; suitable for identical circuit roles including switching and amplification. | Select when requiring MTF suffix for procurement alignment or specific distributor inventory. |
| MMBT3904LT1G | Higher VCEO (40 V vs. 45 V), wider hFE range (100–300), same SOT23-3 package (not pin-compatible with SOT323). | Requires PCB footprint redesign; better suited for higher-volume cost-sensitive applications with looser gain tolerance. | Choose only if board layout allows SOT23 replacement and gain variability is acceptable. |
Compared with BC847BW/SNF, BC847BMTF offers identical electrical behavior and mechanical fit, while MMBT3904LT1G trades guaranteed B-bin hFE and superior VCEO for broader availability and lower unit cost-making it viable only with layout revision and gain-margin validation.
Availability
BC847BW/SNF is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface expansion, audio pre-amplification stages, and level-shifting applications requiring stable component supply and consistent B-grade hFE performance.
Supply support for BC847BW/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 markets.
The BC847xW series targets cost-sensitive, space-constrained applications needing robust general-purpose NPN transistors with standardized SOT323 packaging and tightly binned DC gain.
FAQ
Is BC847BW/SNF qualified for automotive applications?
No. BC847BW/SNF is explicitly designated as non-automotive qualified per Nexperia's revision history (Rev. 13, July 2022). It lacks AEC-Q101 stress testing and is intended only for industrial, consumer, and commercial use. Automotive alternatives must be selected from Nexperia's -Q qualified BC847xW-Q series.
What is the meaning of the "/SNF" suffix in BC847BW/SNF?
The "/SNF" suffix denotes a specific Nexperia manufacturing variant: "SN" indicates the SOT323 package with standard lead finish (tin), and "F" signifies compliance with JEDEC J-STD-020 moisture sensitivity level 1 (MSL1), allowing unlimited floor life before reflow. It does not affect electrical specifications.
Can BC847BW/SNF replace BC847CW in a circuit?
Only if the circuit tolerates reduced DC current gain. BC847BW has hFE = 200–450, while BC847CW offers 420–800. In bias-critical analog amplifiers or high-gain switching stages, substitution may cause insufficient drive or unstable quiescent points-verify operating point with worst-case hFE min.
What is the maximum allowable PCB copper area for thermal relief with BC847BW/SNF?
Nexperia specifies Rth(j-a) = 625 K/W assuming a standard FR4 PCB with single-sided 1 oz copper and tin-plated traces. No minimum copper area is mandated, but increasing exposed copper around the SOT323 pad (e.g., 2×2 mm thermal pad with 4–6 vias to inner ground plane) can reduce Rth(j-a) by 15–25%, improving sustained 100 mA operation.
BC847BW/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:
- 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/SNF FAQ
1.How can I place an order for BC847BW/SNF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847BW/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 BC847BW/SNF reliable?
The price and inventory of BC847BW/SNF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847BW/SNF is usually 5 days.
3.What payment methods are accepted for BC847BW/SNF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847BW/SNF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847BW/SNF?
BC847BW/SNF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847BW/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 BC847BW/SNF?
For technical support, including BC847BW/SNF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847BW/SNF requirements.
6.How does Aetrix verify that BC847BW/SNF is sourced from the original manufacturer or authorized distributors?
All BC847BW/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 BC847BW/SNF meets industry standards.
7.What is the process for return or replacement of BC847BW/SNF?
All BC847BW/SNF units undergo pre-shipment inspection (PSI). If there is an issue with BC847BW/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 BC847BW/SNF part is unused and in its original packaging.
Return procedure for BC847BW/SNF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847BW/SNF Tags
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Nexperia USA Inc.
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