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Nexperia USA Inc. BC846BW,135
- Part No.:
- BC846BW,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC846BW,135.pdf
- Description:
- TRANS NPN 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:19,188
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Product details
Overview
BC846BW,135 from Nexperia is a 65 V, 100 mA NPN general-purpose transistor in SOT323 (SC-70) package, optimized for low-power switching and linear amplification in space-constrained PCBs. It delivers hFE = 200–450 at VCE = 5 V / IC = 2 mA, VCE(sat) ≤ 400 mV at IC = 100 mA / IB = 5 mA, and fT = 100 MHz - enabling reliable signal conditioning in portable sensor interfaces and LED driver bias stages.
For engineers reviewing the BC846BW,135 datasheet, BC846BW,135 pinout, BC846BW,135 application, or BC846BW,135 equivalent, key selection criteria include DC current gain grouping (Group B), thermal resistance (Rth(j-a) = 625 K/W on FR4), junction temperature limit (150 °C), and SC-70 footprint compatibility with high-density routing.
Technical Context
This NPN bipolar junction transistor operates in active, saturation, and cutoff regions with defined absolute maximum ratings: VCEO = 65 V, IC = 100 mA, Ptot = 200 mW at Tamb ≤ 25 °C. Its base-emitter and collector-base breakdown voltages are 6 V and 80 V respectively, supporting robust biasing in 5 V and 3.3 V logic-level circuits.
The device exhibits temperature-dependent characteristics: VBE decreases by ~2 mV/K, and VBE(sat) decreases by ~1.7 mV/K. Its transition frequency of 100 MHz and low capacitance (Cc = 2–3 pF, Ce = 11 pF) support stable small-signal amplification up to mid-VHF range without oscillation risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum safe collector-emitter voltage before breakdown; enables use in 24 V industrial control inputs and 5 V microcontroller peripheral drivers. |
| IC | 100 mA continuous - Supports direct drive of small relays, LEDs, and logic-level MOSFET gates without external buffering. |
| hFE | 200–450 @ VCE=5 V, IC=2 mA - Tight gain binning (Group B) ensures predictable base current requirements in precision current mirrors and analog front-ends. |
| VCE(sat) | ≤400 mV @ IC=100 mA, IB=5 mA - Minimizes conduction loss and self-heating in high-duty-cycle switching applications like PWM dimming circuits. |
| fT | 100 MHz - Enables stable small-signal amplification in audio preamps and RF detector stages up to 10 MHz with adequate gain margin. |
| Rth(j-a) | 625 K/W - Thermal performance on standard FR4 PCB defines maximum allowable power dissipation under natural convection cooling. |
| Cc | 2–3 pF - Low collector capacitance reduces Miller effect, preserving bandwidth in common-emitter amplifier configurations. |
Pinout & Package
SOT323 (SC-70) is a 3-pin, surface-mount plastic package measuring 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), optimized for automated placement and reflow soldering on high-density PCBs. Its compact footprint supports >10,000 units per square decimeter in consumer electronics assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires 5–10 µA to 5 mA drive depending on load; polarity-sensitive connection for forward-biased junction operation. |
| 2 | Emitter (E) | Current sink node; internally connected to substrate; must be tied to lowest potential in NPN switch configuration. |
| 3 | Collector (C) | Output terminal; handles full load current up to 100 mA; connects to higher-potential rail or inductive load return path. |
Key Features
| Feature | Design Value |
|---|---|
| High-current-gain binning | hFE = 200–450 (Group B) - Reduces base drive variability across production lots, simplifying bias network design in analog sensors. |
| Low saturation voltage | VCE(sat) ≤ 400 mV at full rated current - Limits power loss to <40 mW during on-state, critical for thermally constrained wearables and IoT nodes. |
| Ultra-small SMD package | SOT323 footprint (2.2 × 1.35 mm) - Enables placement adjacent to 0201 passives and under fine-pitch ICs, saving >30% board area vs. SOT23. |
| Thermal robustness | Junction temperature rating of 150 °C - Allows operation in sealed enclosures with ambient temperatures up to 85 °C without derating. |
| Low noise figure | NF = 2–10 dB @ IC = 200 µA - Supports low-noise preamplification in battery-powered environmental monitoring front-ends. |
Applications
| LED Current Control | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving discrete indicator LEDs or low-current RGB LED segments in handheld medical devices. IC Role / Device Role / Timing Role: NPN switch controlling cathode-side current path; operated in saturation with fixed base resistor. Use Value: VCE(sat) ≤ 400 mV ensures >95% efficiency at 20 mA, minimizing heat buildup in sealed plastic housings. |
Use Scenario: Extending digital output capability of resource-limited MCUs (e.g., ARM Cortex-M0+) in smart home hubs. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between 3.3 V GPIO and 5 V/12 V peripheral loads. Use Value: hFE ≥ 200 guarantees reliable turn-on with ≤100 µA MCU drive current, eliminating need for dedicated level translators. |
| Signal Amplification Stage | Load Switch for Sensor Bias |
|
Use Scenario: First-stage amplification of piezoelectric vibration sensor outputs in predictive maintenance modules. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration resistor for linearity. Use Value: fT = 100 MHz and Cc = 2.5 pF enable stable 10× gain up to 5 MHz without compensation networks. |
Use Scenario: Enabling/disabling bias voltage to MEMS pressure sensors during sleep/wake cycles in battery-powered trackers. IC Role / Device Role / Timing Role: High-side or low-side load switch controlled by MCU wake-up interrupt signal. Use Value: IC = 100 mA rating supports simultaneous biasing of multiple sensors; Rth(j-a) = 625 K/W allows 100% duty cycle at 25 °C ambient. |
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,135 | VCEO = 45 V (vs. 65 V); identical hFE range and SOT323 package | Not suitable for 48 V telecom input protection or 24 V industrial I/O where 65 V headroom is required | Select only when system max voltage ≤ 40 V and cost sensitivity outweighs voltage margin needs |
| MMBT3904LT1G | hFE = 100–300 (wider spread); VCEO = 40 V; same SOT23-3 footprint but larger than SOT323 | Requires PCB redesign due to 2.9 × 1.3 mm SOT23 vs. 2.2 × 1.35 mm SOT323; lower voltage rating limits use in 24 V systems | Choose only if existing SOT23 layout cannot be modified and gain tolerance >200 is acceptable |
Compared with BC846BW,135, BC847BW,135 trades 20 V breakdown margin for marginal cost reduction, while MMBT3904LT1G sacrifices both voltage rating and board-area efficiency for broader supplier availability - making BC846BW,135 optimal for new designs prioritizing miniaturization and 65 V system compatibility.
Availability
BC846BW,135 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller I/O expansion, sensor bias switching, and low-frequency signal amplification requiring stable component supply across high-mix, low-volume production runs.
Supply support for BC846BW,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 high-volume, high-reliability essential semiconductors - delivering discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BC846xW series belongs to Nexperia's general-purpose transistor product line, engineered specifically for cost-sensitive, space-constrained applications demanding consistent gain binning, low saturation voltage, and robust thermal performance in ultra-small packages.
FAQ
What is the maximum continuous collector current for BC846BW,135?
The absolute maximum continuous collector current is 100 mA at ambient temperature ≤25 °C on a standard FR4 PCB. Derating is required above 25 °C: current must be reduced by 1.2 mA/°C beyond 25 °C to maintain junction temperature ≤150 °C, based on Rth(j-a) = 625 K/W and Ptot = 200 mW rating.
How does the hFE binning of BC846BW differ from BC846AW and BC846W?
BC846BW is Group B with hFE = 200–450 at VCE = 5 V / IC = 2 mA; BC846AW is Group A (110–220); BC846W is ungrouped (110–450). This tighter binning ensures predictable base current requirements in analog circuits where gain variation directly impacts offset and linearity.
Can BC846BW,135 replace BC846B in through-hole designs?
No - BC846BW,135 uses SOT323 (SC-70) surface-mount packaging, while BC846B uses TO-92 through-hole packaging. The pinouts differ (SOT323: 1-B, 2-E, 3-C; TO-92: E-B-C), and thermal performance, parasitic capacitance, and assembly methods are incompatible. A redesign is required for migration.
What is the typical noise figure and at what conditions is it specified?
The noise figure is 2–10 dB, measured at IC = 200 µA, VCE = 5 V, RS = 2 kΩ, f = 1 kHz, and bandwidth = 200 Hz. This makes BC846BW,135 suitable for low-noise preamplifier stages in battery-powered acoustic and vibration sensing applications.
BC846BW,135 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC846xW
- 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):
- 65 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
BC846BW,135 FAQ
1.How can I place an order for BC846BW,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846BW,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 BC846BW,135 reliable?
The price and inventory of BC846BW,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846BW,135 is usually 5 days.
3.What payment methods are accepted for BC846BW,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BW,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846BW,135?
BC846BW,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846BW,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 BC846BW,135?
For technical support, including BC846BW,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BW,135 requirements.
6.How does Aetrix verify that BC846BW,135 is sourced from the original manufacturer or authorized distributors?
All BC846BW,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 BC846BW,135 meets industry standards.
7.What is the process for return or replacement of BC846BW,135?
All BC846BW,135 units undergo pre-shipment inspection (PSI). If there is an issue with BC846BW,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 BC846BW,135 part is unused and in its original packaging.
Return procedure for BC846BW,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846BW,135 Tags
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Nexperia USA Inc.
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