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Nexperia USA Inc. BC847BW,135
- Part No.:
- BC847BW,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC847BW,135.pdf
- Description:
- TRANS NPN 45V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:84,087
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Product details
Overview
BC847BW,135 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,135 datasheet, BC847BW,135 pinout, BC847BW,135 application, or BC847BW,135 equivalent, this part supports design-in decisions requiring verified hFE binning, thermal performance on FR4 PCBs, and SMT-compatible footprint compliance with JEITA SC-70 standards.
Technical Context
The BC847BW,135 operates as a silicon planar epitaxial NPN transistor optimized for linear amplification and digital switching in low-voltage, low-current circuits. Its hFE range (200–450) enables predictable biasing in common-emitter configurations without external gain stabilization.
Thermal resistance Rth(j-a) is 625 K/W under standard FR4 mounting conditions, and absolute maximum ratings include VCBO = 50 V, VEBO = 6 V, and Tj = 150 °C - confirming suitability for ambient-temperature-stable signal paths in non-automotive embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; defines safe operating voltage headroom in 3.3 V/5 V logic-level switching. |
| IC | 100 mA - Continuous collector current rating; supports load switching up to ~80 mA typical with 20% derating at 70 °C ambient. |
| hFE | 200–450 @ VCE = 5 V, IC = 2 mA - Tighter gain bin than BC847W/BC847AW; reduces base drive variability in precision amplifier stages. |
| VCE(sat) | 200–400 mV @ IC = 100 mA, IB = 5 mA - Low saturation voltage minimizes power loss in high-duty-cycle switching applications. |
| Ptot | 200 mW @ Tamb ≤ 25 °C - Power dissipation limit on standard FR4 PCB; requires thermal layout consideration above 50 °C ambient. |
| Rth(j-a) | 625 K/W - Junction-to-ambient thermal resistance confirms need for copper pour or spacing in thermally dense layouts. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads; dimensions: 2.2 mm × 1.35 mm × 0.95 mm (L × W × H); standard footprint per Fig. 15 (reflow soldering).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal for forward-biased junction; requires current-limited drive (e.g., 1–10 kΩ series resistor) to avoid overdrive. |
| 2 | Emitter (E) | Current return path; tied to ground or low-side reference in common-emitter switching; polarity-sensitive for correct biasing. |
| 3 | Collector (C) | Output current path; connects to load or pull-up; must remain below 45 V relative to emitter to prevent avalanche failure. |
Key Features
| Feature | Design Value |
|---|---|
| Three-gain-bin selection | BC847BW provides hFE = 200–450 - enables consistent bias point selection across production batches without recalculating base resistors. |
| SOT323 (SC-70) package | 0.65 mm pitch, 2.2 mm × 1.35 mm footprint - supports high-density routing in space-constrained IoT sensors and wearables. |
| Low VCE(sat) | 200–400 mV at full-rated current - reduces conduction loss by >60% vs. legacy BC847 variants, improving efficiency in battery-powered switches. |
| JEITA-compliant marking | Marking code "1F%" (where % = site code) - enables traceability and counterfeit mitigation via standardized top-side laser marking. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving discrete indicator LEDs from 3.3 V MCU outputs with current limiting. IC Role / Device Role / Timing Role: Low-side switch controlling LED anode-to-VCC path; operates in saturation mode with <1 µs turn-on delay. Use Value: 200–450 hFE ensures reliable saturation at IB = 1–2 mA, eliminating need for Darlington pairing in space-limited designs. |
Use Scenario: Extending I/O count of ARM Cortex-M0+ microcontrollers using discrete transistor arrays. IC Role / Device Role / Timing Role: Digital buffer/inverter stage translating 3.3 V logic levels to 5 V peripheral interfaces. Use Value: VCEO = 45 V and VCBO = 50 V allow safe operation with 5 V rail and transient margin, avoiding latch-up during hot-plug events. |
| Audio Pre-amplifier Stage | Power Supply Enable Switch |
|
Use Scenario: Low-noise voltage amplification in portable audio codec front-ends. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration; fT = 100 MHz supports bandwidth up to 10 kHz with <0.5 dB ripple. Use Value: NF = 2–10 dB at 1 kHz and 200 µA bias enables SNR > 75 dB in battery-powered headphone amps without active noise cancellation. |
Use Scenario: Enabling/disabling auxiliary 3.3 V LDO rails in multi-rail PMIC subsystems. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlled by system supervisor IC; operates in linear or saturated region depending on control logic. Use Value: Ptot = 200 mW and Rth(j-a) = 625 K/W permit continuous 80 mA switching at 60 °C ambient without heatsinking or derating. |
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 | Same hFE bin (200–450) but in larger SOT23 package; 350 mW Ptot; Rth(j-a) = 300 K/W. | Higher power handling and thermal margin; requires 30% more board area. | Select when thermal stress exceeds 60 °C or when legacy SOT23 footprint compatibility is required. |
| MMBT3904LT1G | hFE = 100–300; VCEO = 40 V; same SOT23-3 package; higher VBE(sat) (0.85 V typical). | Lower gain consistency and reduced voltage margin; widely available but less precise for bias-critical stages. | Select for cost-sensitive, non-precision switching where ±20% hFE variation is acceptable. |
Compared with BC847B,115, the BC847BW,135 trades thermal headroom for 40% smaller footprint and tighter assembly tolerances; versus MMBT3904LT1G, it delivers 50% higher minimum hFE and 12.5% higher VCEO, enabling more robust bias networks in miniaturized designs.
Availability
BC847BW,135 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 JEITA-standardized SMT packaging.
Supply support for BC847BW,135 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for mass-market electronics.
The BC847xW series targets cost-sensitive, high-volume applications in consumer, industrial, and computing markets where small-footprint, gain-binned general-purpose transistors are needed for signal conditioning and power control.
FAQ
What is the maximum allowable junction temperature for BC847BW,135?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in Table 6 of the Nexperia datasheet Rev. 13. Operation above this threshold risks permanent parametric shift or metallization failure. Derating begins at 25 °C ambient, with Ptot decreasing linearly to zero at 150 °C junction temperature.
Does BC847BW,135 support automotive-grade applications?
No - BC847BW,135 is explicitly marked as non-automotive qualified in the revision history (Section 13). Nexperia offers separate -Q qualified variants (e.g., BC847BW-Q) for AEC-Q101 compliance; this part lacks automotive qualification testing and should not be used in safety-critical vehicle systems.
How does the "135" suffix in BC847BW,135 affect its specifications?
The "135" denotes the tape-and-reel packaging variant per Nexperia's ordering convention: 3,000 units per reel, 8 mm tape width, EIA-481-D compliant embossed carrier tape. Electrical and thermal specs are identical to BC847BW in other packaging formats (e.g., 115 = SOT23, 125 = SOT323 bulk).
Can BC847BW,135 replace BC847CW in a circuit designed for hFE ≥ 420?
No - BC847CW has a minimum hFE of 420 (typ. 520), while BC847BW guarantees only 200 (typ. 290). Substituting it may cause insufficient base drive, leading to incomplete saturation, elevated VCE(sat), or thermal runaway in high-gain-dependent circuits like linear amplifiers or precision switches.
BC847BW,135 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC847xW
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- SOT-323
BC847BW,135 FAQ
1.How can I place an order for BC847BW,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847BW,135 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,135 reliable?
The price and inventory of BC847BW,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847BW,135 is usually 5 days.
3.What payment methods are accepted for BC847BW,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847BW,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847BW,135?
BC847BW,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847BW,135 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,135?
For technical support, including BC847BW,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847BW,135 requirements.
6.How does Aetrix verify that BC847BW,135 is sourced from the original manufacturer or authorized distributors?
All BC847BW,135 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,135 meets industry standards.
7.What is the process for return or replacement of BC847BW,135?
All BC847BW,135 units undergo pre-shipment inspection (PSI). If there is an issue with BC847BW,135, 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,135 part is unused and in its original packaging.
Return procedure for BC847BW,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847BW,135 Tags
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onsemi
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MMBT3904-7-F
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MMBT3904LT1G
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MMBT3906-7-F
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MMBT3904-TP
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MMBT2222A-7-F
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BC846BLT1G
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BC847B,215
Nexperia USA Inc.
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MMBTA06LT1G
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