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Nexperia USA Inc. BC849C,215
- Part No.:
- BC849C,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC849C,215.pdf
- Description:
- TRANS NPN 30V 0.1A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:73,471
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Product details
Overview
BC849C from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT23 package, rated for 30 V VCEO, 100 mA IC, and DC current gain (hFE) of 450–800 at 2–10 mA collector current. It serves as a low-voltage, low-current switching and amplification device in automotive body electronics, sensor interface stages, and LED driver bias circuits.
For engineers reviewing the BC849C datasheet, BC849C pinout, BC849C application, or BC849C equivalent, key selection criteria include its AEC-Q101 qualification, thermal resistance (Rth(j-a) = 500 K/W on FR4), VCE(sat) ≤ 600 mV at 100 mA/5 mA drive, and guaranteed hFE minimum of 420 at 2 mA - critical for stable biasing in temperature-varying environments.
Technical Context
The BC849C operates as a silicon planar epitaxial NPN transistor with base-emitter and collector-base junctions optimized for linear amplification and saturated switching. Its hFE remains ≥420 across –55 °C to +150 °C, and VBE exhibits predictable negative temperature coefficient (~2 mV/K).
Designed for surface-mount reliability in automotive modules, it supports reflow and wave soldering per SOT23 footprint (2.9 mm × 1.3 mm × 1.0 mm), with thermal performance validated on single-sided FR4 PCBs. Its 100 MHz fT and low Cc (2.5 pF) enable stable operation in low-frequency analog and digital control paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Maximum safe collector-emitter voltage under open-base condition; defines upper rail limit in 24 V automotive supply interfaces. |
| IC | 100 mA continuous - Sustained collector current capability; sufficient for driving small relays, LEDs, or logic-level MOSFET gates. |
| hFE | 420–800 @ 2–10 mA - Guaranteed DC current gain range ensures predictable base drive requirements across production lots and temperatures. |
| VCE(sat) | ≤600 mV @ IC = 100 mA, IB = 5 mA - Low saturation voltage minimizes power loss and self-heating during switching duty cycles. |
| fT | 100 MHz - Transition frequency confirms usable bandwidth for audio preamps, PWM signal conditioning, and sensor amplifier stages. |
| Rth(j-a) | 500 K/W - Thermal resistance on standard FR4 PCB; enables derating calculations for ambient temperatures up to +105 °C in enclosed modules. |
Pinout & Package
SOT23 plastic surface-mounted package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body size, tin-plated terminations compatible with lead-free reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires ~0.7 V forward bias and current sufficient to drive specified IC with margin (e.g., 5 mA for 100 mA output). |
| 2 | Emitter (E) | Current return path; internally connected to substrate; must be tied to lowest potential in common-emitter configuration. |
| 3 | Collector (C) | Output current terminal; handles full load current and dissipates power during saturation or active-region operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, lighting control units, and body ECUs per stress-test requirements. |
| Guaranteed hFE min. 420 | Ensures consistent base drive design across temperature (–55 °C to +150 °C) and process variation without recalibration. |
| VCE(sat) ≤ 600 mV | Reduces conduction losses below 60 mW at 100 mA, enabling use in thermally constrained PCB layouts without heatsinking. |
| Low Cc (2.5 pF) | Minimizes Miller effect in switching applications, supporting clean turn-off behavior up to 100 kHz PWM frequencies. |
| FR4-optimized thermal profile | 500 K/W Rth(j-a) measured on standard 35 µm copper PCB enables accurate junction temperature estimation for lifetime modeling. |
Applications
| Automotive Interior Lighting Control | Engine Coolant Temperature Sensor Interface |
|---|---|
|
Use Scenario: Switching 12 V LED strips in door panels and footwells using PWM from microcontroller GPIO. IC Role / Device Role / Timing Role: NPN switch providing current gain and level translation between 3.3 V logic and 12 V load. Use Value: VCE(sat) ≤ 600 mV ensures <100 mW dissipation at 100 mA, eliminating need for thermal relief pads in compact door module PCBs. |
Use Scenario: Amplifying low-level analog output (0.1–4.5 V) from NTC-based coolant sensor before ADC sampling. IC Role / Device Role / Timing Role: Common-emitter amplifier stage with stable hFE over –40 °C to +125 °C ambient. Use Value: hFE ≥420 at 2 mA and Tj = 125 °C maintains gain consistency across full vehicle operating range. |
| Body Control Module (BCM) Wake-Up Circuit | Industrial Fan Speed Feedback Buffer |
|
Use Scenario: Detecting low-current wake-up signals (e.g., door handle touch) and triggering MCU reset via open-collector output. IC Role / Device Role / Timing Role: High-input-impedance switch with low ICBO (≤15 nA at 25 °C) minimizing false triggers. Use Value: Ultra-low leakage (ICBO ≤5 µA at 150 °C) prevents spurious wake-ups in hot under-hood environments. |
Use Scenario: Isolating tachometer feedback pulses from brushless fan motor to prevent noise coupling into microcontroller timer inputs. IC Role / Device Role / Timing Role: Digital buffer stage converting noisy collector-emitter pulses into clean logic-level signals. Use Value: fT = 100 MHz and Cc = 2.5 pF ensure rise/fall times <30 ns, preserving pulse integrity up to 50 kHz fan speeds. |
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 |
|---|---|---|---|
| BC847C,215 | Lower VCEO (45 V vs. 30 V), same SOT23 package and hFE range (420–800), but not AEC-Q101 qualified. | Acceptable for non-automotive industrial controls where higher voltage margin is needed but automotive qualification is unnecessary. | Select when system voltage exceeds 30 V or AEC-Q101 is not required; verify layout compatibility with identical pinout. |
| MMBT3904LT1G | Same VCEO (40 V), slightly lower hFE min. (100), higher VCE(sat) (300 mV typical at 10 mA), AEC-Q101 qualified. | Better suited for high-speed switching (>1 MHz) due to faster transition time, but less optimal for precision DC amplification. | Prefer for fast-switching digital buffers; avoid where hFE stability >400 is critical for analog gain accuracy. |
Compared with BC847C,215, the BC849C trades voltage headroom for automotive qualification and tighter thermal specs; versus MMBT3904LT1G, it delivers higher guaranteed hFE and lower VCE(sat) at high current - making it superior for precision biasing and low-loss switching in automotive modules.
Availability
BC849C is available at Aetrix Electronics and suitable for automotive interior lighting control, engine sensor interface circuits, and body control module wake-up functions requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BC849C 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-qualified components and advanced packaging technologies.
The BC849C belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered specifically for robust, cost-effective switching and amplification in automotive body electronics and industrial control systems.
FAQ
Is BC849C suitable for linear amplification applications?
Yes - its hFE of 450–800 at 2–10 mA and low noise figure (≤4 dB at 1 kHz) support stable small-signal amplification. The device maintains hFE ≥420 from –55 °C to +150 °C, enabling reliable gain in engine bay sensor front-ends without trimming.
What is the maximum allowable PCB trace width for thermal relief on the collector pad?
No dedicated thermal relief is required - the BC849C's Rth(j-a) of 500 K/W is characterized on standard FR4 with 35 µm copper and no thermal vias. For ambient >85 °C, increase copper area to ≥40 mm² per pad to maintain Tj < 125 °C at 100 mA.
Can BC849C replace BC846B in existing designs?
Only with validation - BC849C has higher hFE (min. 420 vs. 200) and lower VCE(sat) (600 mV vs. 900 mV), which may cause overdrive in base-biased circuits. Recalculate base resistor values and verify saturation margin at worst-case temperature and supply.
Does BC849C support lead-free reflow per JEDEC J-STD-020?
Yes - the SOT23 package is qualified for peak reflow temperatures up to 260 °C (per JEDEC J-STD-020D). The recommended profile uses ramp-to-spike ≤3 °C/s, peak at 245 °C for 30–60 s, and cooling rate ≤6 °C/s, matching standard SnAgCu paste specifications.
BC849C,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 420 @ 2mA, 5V
- Power - Max:
- 250 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BC849C,215 FAQ
1.How can I place an order for BC849C,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC849C,215 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 BC849C,215 reliable?
The price and inventory of BC849C,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC849C,215 is usually 5 days.
3.What payment methods are accepted for BC849C,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC849C,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC849C,215?
BC849C,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC849C,215 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 BC849C,215?
For technical support, including BC849C,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC849C,215 requirements.
6.How does Aetrix verify that BC849C,215 is sourced from the original manufacturer or authorized distributors?
All BC849C,215 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 BC849C,215 meets industry standards.
7.What is the process for return or replacement of BC849C,215?
All BC849C,215 units undergo pre-shipment inspection (PSI). If there is an issue with BC849C,215, 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 BC849C,215 part is unused and in its original packaging.
Return procedure for BC849C,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC849C,215 Tags
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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
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
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