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Nexperia USA Inc. BC846W-QF
- Part No.:
- BC846W-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC846W-QF.pdf
- Description:
- TRANS NPN 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:9,174
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Product details
Overview
BC846W-Q from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT323 (SC-70) package, rated for 65 V VCEO, 100 mA IC, and DC current gain (hFE) of 110–450 at VCE = 5 V and IC = 2 mA, used for automotive-grade switching and amplification in space-constrained PCBs.
For engineers reviewing the BC846W-Q datasheet, BC846W-Q pinout, BC846W-Q application, or BC846W-Q equivalent, this page delivers verified pin functions, thermal resistance (625 K/W), saturation voltage (200–400 mV at IC = 100 mA), noise figure (2–10 dB), and automotive qualification status to support reliable component selection.
Technical Context
This transistor operates as a discrete bipolar junction device with base-controlled current amplification, supporting linear amplification and digital on/off switching via fixed-current or voltage-driven base biasing. Its 65 V collector-emitter breakdown and 80 V collector-base rating enable use in 24 V automotive supply rails with margin.
Thermal performance is defined for FR4 PCB mounting (single-sided, 35 µm Cu), with Rth(j-a) = 625 K/W and Tj max = 150 °C, while AEC-Q101 qualification confirms robustness across -65 °C to +150 °C ambient operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum safe collector-emitter voltage under open-base condition; supports 24 V automotive systems with ≥2.7× voltage margin. |
| IC | 100 mA continuous - Rated collector current defines maximum steady-state load drive capability in switching applications. |
| hFE | 110–450 at VCE = 5 V, IC = 2 mA - Wide DC current gain range enables flexible base resistor design for varying drive strength requirements. |
| VCE(sat) | 200–400 mV at IC = 100 mA, IB = 5 mA - Low saturation voltage minimizes power loss and heating in high-duty-cycle switching. |
| fT | 100 MHz - Transition frequency confirms usable bandwidth for low-speed digital logic interfacing and audio-frequency amplification. |
| Rth(j-a) | 625 K/W - Junction-to-ambient thermal resistance on standard FR4 PCB; determines temperature rise under given power dissipation. |
Pinout & Package
SOT323 (SC-70) plastic surface-mount package: ultra-compact 3-pin outline (2.2 mm × 1.35 mm × 0.95 mm), optimized for high-density automotive PCB layouts and reflow/wave soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires external bias network to set operating point for amplification or switching. |
| 2 | Emitter (E) | Common reference terminal; connected to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | Output current terminal; sinks load current in low-side switch topology or provides amplified output in active mode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| SOT323 (SC-70) package | Enables <1.5 mm² board area usage-critical for compact ECUs and multi-channel driver IC replacements. |
| Two gain variants in same series | BC846AW-Q (110–220 hFE) and BC846BW-Q (200–450 hFE) allow precise gain matching without redesign. |
| Low VBE(sat) | 900 mV max at IC = 100 mA ensures reliable turn-on with 3.3 V or 5 V microcontroller GPIOs. |
Applications
| Automotive Door Module Switching | Industrial Sensor Signal Amplification |
|---|---|
Use Scenario: Driving LED status indicators and small solenoids in door control units exposed to vibration and temperature cycling. IC Role / Device Role / Timing Role: Discrete NPN switch controlling 50 mA loads with fast turn-on/turn-off (<100 ns propagation delay implied by fT). Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; low VCE(sat) reduces heat buildup in sealed enclosures. | Use Scenario: Amplifying weak analog outputs (e.g., thermistor or bridge sensor signals) before ADC sampling in PLC I/O modules. IC Role / Device Role / Timing Role: Linear-mode common-emitter amplifier with stable hFE across -40 °C to +125 °C ambient. Use Value: Tight VBE tolerance (580–700 mV at IC = 2 mA) enables predictable biasing; low noise figure (2–10 dB) preserves signal integrity. |
| USB-C Power Path Control | Smart Home Relay Driver Stage |
Use Scenario: Enabling/disabling 5 V power rails to USB-C peripheral ports using MCU GPIO control in portable docking stations. IC Role / Device Role / Timing Role: Low-side switch with 100 mA IC rating handling inrush-limited loads and hot-swap sequencing. Use Value: 65 V VCEO headroom prevents breakdown during transient overvoltage events; SC-70 footprint saves space vs. SOT23. | Use Scenario: Interfacing 3.3 V IoT microcontrollers to 12 V relay coils in smart lighting and HVAC control panels. IC Role / Device Role / Timing Role: Digital interface transistor providing galvanic isolation and current gain between logic and inductive load. Use Value: 200 mA ICM peak rating handles relay coil turn-on surge; 6 V VEBO prevents base-emitter damage during flyback transients. |
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 |
|---|---|---|---|
| BC847W-Q | Same SOT323 package; higher IC rating (150 mA) and VCEO (45 V); hFE 110–800 | Lower voltage rating limits use in 24 V systems requiring >45 V margin | Select when higher current drive is needed and system voltage ≤36 V. |
| MMBT3904LT1G | Same SOT23 package; VCEO = 40 V, IC = 200 mA, hFE = 100–300; not AEC-Q101 qualified | Larger footprint (SOT23 vs. SOT323); lacks automotive qualification | Choose for cost-sensitive industrial designs where AEC-Q101 is not required. |
Compared with BC846W-Q, BC847W-Q offers higher current but reduced voltage margin, while MMBT3904LT1G trades automotive compliance and miniaturization for raw current capacity and broader commercial availability.
Availability
BC846W-Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and smart home relay driver circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BC846W-Q 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, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.
The BC846xW-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor portfolio, engineered specifically for space-constrained, thermally demanding automotive subsystems requiring proven field reliability.
FAQ
What is the maximum junction temperature for BC846W-Q?
The absolute maximum junction temperature (Tj) is 150 °C, validated under AEC-Q101 stress testing. Operation at this limit requires derating power dissipation per Rth(j-a) = 625 K/W and proper PCB copper area to maintain thermal stability in automotive environments.
Does BC846W-Q support pulsed operation beyond its DC current rating?
Yes - peak collector current (ICM) is rated at 200 mA for single pulses ≤1 ms, enabling short-duration surge handling such as relay coil energization or ESD clamp discharge, provided duty cycle and average power remain within Ptot = 200 mW limits.
How does the BC846W-Q differ from BC846AW-Q and BC846BW-Q?
BC846W-Q has the broadest hFE range (110–450); BC846AW-Q is binned to 110–220 for tighter gain control in feedback circuits; BC846BW-Q is binned to 200–450 for higher guaranteed minimum gain in low-drive applications like microcontroller interfacing.
Is the SOT323 footprint compatible with automated optical inspection (AOI) systems?
Yes - the SOT323 package features clearly defined solder land geometry (0.55 mm pad width, 0.6 mm length, 2.65 mm center-to-center pitch) and standardized marking ('1D%'), enabling reliable AOI detection of solder bridging, tombstoning, and placement offset per IPC-A-610 Class 2/3 standards.
BC846W-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- 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:
- 110 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC846W-QF FAQ
1.How can I place an order for BC846W-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846W-QF 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 BC846W-QF reliable?
The price and inventory of BC846W-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846W-QF is usually 5 days.
3.What payment methods are accepted for BC846W-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846W-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846W-QF?
BC846W-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846W-QF 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 BC846W-QF?
For technical support, including BC846W-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846W-QF requirements.
6.How does Aetrix verify that BC846W-QF is sourced from the original manufacturer or authorized distributors?
All BC846W-QF 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 BC846W-QF meets industry standards.
7.What is the process for return or replacement of BC846W-QF?
All BC846W-QF units undergo pre-shipment inspection (PSI). If there is an issue with BC846W-QF, 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 BC846W-QF part is unused and in its original packaging.
Return procedure for BC846W-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846W-QF Tags
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