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Nexperia USA Inc. BC847B,215
- Part No.:
- BC847B,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC847B,215.pdf
- Description:
- TRANS NPN 45V 0.1A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:273,642
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Product details
Overview
BC847B,215 from Nexperia is an NPN general-purpose bipolar junction transistor (BJT) in SOT23 (TO-236AB) 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-voltage switching or small-signal amplification device in discrete analog and digital interface circuits, including level-shifting stages in microcontroller I/O drivers.
For engineers reviewing the BC847B,215 datasheet, BC847B,215 pinout, BC847B,215 application, or BC847B,215 equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, real-world use cases in signal conditioning and load switching, and technically grounded alternative part comparisons - all derived from Nexperia's official Rev. 13 product data sheet.
Technical Context
The BC847B,215 operates as a silicon-based NPN BJT with base-emitter forward voltage (VBE) of 660 mV typical at IC = 10 mA and VCE = 5 V, and collector-emitter saturation voltage (VCE(sat)) of 200–400 mV at IC = 100 mA / IB = 5 mA. Its transition frequency (fT) is 100 MHz at VCE = 5 V and IC = 10 mA, supporting audio-frequency amplification and medium-speed digital switching.
Thermal resistance Rth(j-a) is 500 K/W under standard FR4 PCB mounting conditions, and absolute maximum ratings include VCBO = 50 V, VEBO = 6 V, and Tj = 150 °C - confirming suitability for non-automotive industrial and consumer-grade ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with open base; defines upper rail limit for switch-mode operation. |
| IC | 100 mA continuous - Supports driving LEDs, relays, or logic-level MOSFET gates without external heat sinking. |
| hFE | 200–450 at VCE = 5 V, IC = 2 mA - Enables predictable biasing in Class-A amplifier stages or saturated-switch designs. |
| VCE(sat) | 200–400 mV at IC = 100 mA, IB = 5 mA - Ensures low conduction loss and minimal power dissipation in on-state switching. |
| fT | 100 MHz - Validates usability in audio preamplifiers and clock buffer applications up to ~10 MHz fundamental frequency. |
| Ptot | 250 mW at Tamb ≤ 25 °C - Sets thermal derating boundary for PCB layout and copper area requirements. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package: 3-terminal, single-row, gull-wing leads; 1.3 mm height, 2.9 mm × 1.3 mm footprint; JEDEC-compliant outline per Figure 14.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires series resistor to limit IB and ensure saturation or linear operation. |
| 2 | Emitter (E) | Common reference terminal; tied to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | Output current sink node; connects to load (e.g., LED anode or relay coil) when used in low-side switch topology. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE gain bins (A/B/C) | Enables precise current gain selection: BC847B offers mid-range 200–450 hFE, balancing stability and drive capability. |
| Low VCE(sat) | 200–400 mV ensures <10 mW conduction loss at 100 mA, reducing thermal stress in compact PCB layouts. |
| 100 MHz fT | Supports stable small-signal amplification up to audio band without phase inversion or gain roll-off. |
| Standard SOT23 footprint | Ensures drop-in compatibility with existing reflow soldering processes and automated pick-and-place equipment. |
Applications
| LED Driver Stage | Microcontroller I/O Buffer |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU GPIO pins with current limiting. IC Role / Device Role / Timing Role: Low-side NPN switch configured in common-emitter mode with base resistor biasing. Use Value: VCE(sat) ≤ 400 mV minimizes voltage drop across transistor, preserving >2.9 V across LED at 20 mA. |
Use Scenario: Level-shifting and current boosting between 1.8 V logic outputs and 5 V peripheral inputs. IC Role / Device Role / Timing Role: Signal inverter and current amplifier; enables clean edge transitions into capacitive loads. Use Value: hFE ≥ 200 ensures reliable saturation with <10 µA base drive, reducing MCU output loading. |
| Audio Preamp Input Stage | Relay Coil Driver |
|
Use Scenario: First-stage amplification of line-level audio signals (≤100 mVpp) before op-amp processing. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased at IC = 1–2 mA for low-noise operation. Use Value: NF = 2–10 dB at 1 kHz and 200 µA enables SNR > 60 dB in battery-powered portable audio front-ends. |
Use Scenario: Switching 12 V/40 mA electromechanical relays in industrial control panels using 3.3 V logic signals. IC Role / Device Role / Timing Role: Saturated switch with forced β = 20 to guarantee turn-on under worst-case hFE and temperature. Use Value: VCEO = 45 V provides 3.75× safety margin over 12 V rail, preventing breakdown during relay 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 |
|---|---|---|---|
| BC847BW,115 | Same hFE bin (200–450), but in SOT323 package (smaller footprint, higher Rth(j-a) = 625 K/W). | Preferred where board space is constrained but thermal budget allows lower power density. | Select when PCB real estate is critical and IC remains ≤ 50 mA average. |
| MMBT3904LT1G | hFE = 100–300 (lower max), VCEO = 40 V, VCE(sat) = 300 mV typical at same conditions. | Marginally lower voltage headroom and gain consistency; widely available but less optimized for precision biasing. | Choose for cost-sensitive, non-critical switching where 40 V rating suffices and gain tolerance >100 is acceptable. |
Compared with BC847B,215, BC847BW,115 trades thermal performance for miniaturization, while MMBT3904LT1G offers broader distribution but reduced VCEO and hFE range - making BC847B,215 optimal for designs requiring guaranteed 45 V operation and tight gain control at 2–10 mA bias points.
Availability
BC847B,215 is available at Aetrix Electronics and suitable for LED driver stages, microcontroller I/O buffering, audio preamplifier input stages, and relay coil driving requiring stable component supply, consistent hFE binning, and SOT23 assembly compatibility.
Supply support for BC847B,215 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 industrial, computing, and consumer markets.
The BC847x series belongs to Nexperia's general-purpose transistor portfolio, engineered for cost-effective, robust switching and amplification in space-constrained SMT applications where reliability and parametric consistency are prioritized over automotive qualification.
FAQ
Is BC847B,215 suitable for automotive applications?
No. BC847B,215 is not automotive-qualified. The datasheet explicitly states it has been changed to non-automotive qualification per Revision v.13 (July 2022). For automotive use, Nexperia offers separate -Q qualified variants such as BC847B-Q, which undergo AEC-Q101 testing and have extended temperature and reliability validation.
What is the marking code for BC847B,215 on the device body?
The top-side marking is "1F%", where "1F" identifies the BC847B type and "%" is a placeholder for the manufacturing site code. This matches Table 5 in the Nexperia datasheet and is laser-etched on the SOT23 package for traceability and bin verification.
How does thermal resistance affect BC847B,215's maximum power handling?
With Rth(j-a) = 500 K/W on standard FR4 PCB, a 250 mW Ptot rating implies a 125 K junction-to-ambient rise at full power - exceeding the 150 °C Tj limit if ambient exceeds 25 °C. Derating is required: at 70 °C ambient, max continuous power drops to ~150 mW to maintain safe junction temperature.
Can BC847B,215 replace BC847C in a circuit designed for high-gain operation?
Not without redesign. BC847C has hFE = 420–800 vs. BC847B's 200–450. Substituting BC847B may cause insufficient base drive in high-gain amplifier or low-base-current switch designs, leading to incomplete saturation or reduced gain. Verify IB margin and VCE(sat) under actual load conditions before substitution.
BC847B,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):
- 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:
- 250 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BC847B,215 FAQ
1.How can I place an order for BC847B,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847B,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 BC847B,215 reliable?
The price and inventory of BC847B,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847B,215 is usually 5 days.
3.What payment methods are accepted for BC847B,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847B,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847B,215?
BC847B,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847B,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 BC847B,215?
For technical support, including BC847B,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847B,215 requirements.
6.How does Aetrix verify that BC847B,215 is sourced from the original manufacturer or authorized distributors?
All BC847B,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 BC847B,215 meets industry standards.
7.What is the process for return or replacement of BC847B,215?
All BC847B,215 units undergo pre-shipment inspection (PSI). If there is an issue with BC847B,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 BC847B,215 part is unused and in its original packaging.
Return procedure for BC847B,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847B,215 Tags
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MMBT3906LT1G
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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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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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