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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Nexperia USA Inc. BC847C/SNR

Name: BC847C/SNR
Brand: Nexperia USA Inc.
SKU: BC847C/SNR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847C/SNR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BC847C/SNR.pdf

Description:: TRANS NPN 45V 0.1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC847C/SNR from Nexperia is an NPN general-purpose transistor in SOT23 (TO-236AB) package, rated for 45 V V_CEO, 100 mA I_C, and DC current gain (h_FE) of 420–800 at V_CE = 5 V and I_C = 2 mA. It serves as a low-voltage switching and small-signal amplification device in consumer power management, LED driver biasing, and sensor interface circuits.

For engineers reviewing the BC847C/SNR datasheet, BC847C/SNR pinout, BC847C/SNR application, or BC847C/SNR equivalent, this page delivers verified pin functions, real-world gain and saturation voltage behavior, thermal derating guidance, and validated alternatives for discrete BJT selection in cost-sensitive SMD designs.

Technical Context

This transistor operates as a silicon NPN bipolar junction device with base-controlled current amplification. Its h_FE range (420–800) enables stable biasing across temperature (−55 °C to +150 °C), while V_CE(sat) ≤ 400 mV at I_C = 100 mA / I_B = 5 mA supports efficient low-loss switching in 3.3 V/5 V logic-level interfaces.

Thermal resistance R_th(j-a) is 500 K/W on FR4 PCB (single-sided copper), and absolute maximum ratings include V_CBO = 50 V, V_EBO = 6 V, and P_tot = 250 mW - defining safe operating area boundaries for continuous and pulsed operation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; sets upper rail limit for 3.3 V/5 V supply switching stages.
I_C	100 mA - Continuous collector current rating; suitable for driving LEDs, relays, and small MOSFET gates.
h_FE	420–800 @ V_CE = 5 V, I_C = 2 mA - High DC gain enables low-base-drive designs in amplifier and linear regulator feedback paths.
V_CE(sat)	≤ 400 mV @ I_C = 100 mA, I_B = 5 mA - Low saturation voltage minimizes conduction loss in high-efficiency switch-mode bias networks.
P_tot	250 mW @ T_amb ≤ 25 °C - Power dissipation limit on standard FR4 PCB; requires thermal derating above 25 °C ambient.
R_th(j-a)	500 K/W - Junction-to-ambient thermal resistance defines temperature rise per watt; critical for reliability in enclosed environments.

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 1.9 mm × 1.1 mm footprint, 1.3 mm height, and tin-plated terminations compatible with reflow and wave soldering per IPC-J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires series resistor to limit I_B and ensure saturation under worst-case h_FE and temperature.
2	Emitter (E)	Common reference terminal; connected to ground or low-side return path in common-emitter configurations.
3	Collector (C)	Output current sink node; ties to load (e.g., LED anode or relay coil) in low-side switching applications.

Key Features

Feature	Design Value
Three h_FE gain groups	BC847A (110–220), BC847B (200–450), BC847C (420–800) - enables precise bias point selection without redesign.
Low V_CE(sat)	≤ 400 mV at full 100 mA load - reduces power loss and self-heating in battery-powered signal conditioning stages.
High f_T	100 MHz - supports audio-frequency amplification and fast digital switching up to ~10 MHz edge rates.
Robust thermal rating	T_j max = 150 °C - allows operation in industrial enclosures with limited airflow and elevated ambient temperatures.

Applications

LED Driver Biasing

Microcontroller GPIO Expansion

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V MCU outputs with current-limiting resistor.

IC Role / Device Role / Timing Role: NPN switch providing low-side current sink path; base driven directly by GPIO.

Use Value: V_CE(sat) ≤ 200 mV ensures >95% LED forward voltage utilization and minimal heat generation at 20 mA.

Use Scenario: Extending digital output count using discrete transistors to drive higher-current loads than MCU pins support.

IC Role / Device Role / Timing Role: General-purpose switch enabling parallel control of multiple solenoids or optocouplers.

Use Value: h_FE ≥ 420 guarantees reliable saturation with ≤ 50 µA base drive, reducing MCU port loading.

Linear Voltage Regulator Feedback

Temperature Sensor Interface

Use Scenario: Amplifying error signal in adjustable LDO feedback loop where precision and stability are required.

IC Role / Device Role / Timing Role: Small-signal amplifier stage in op-amp-assisted regulation circuitry.

Use Value: Low noise figure (2–10 dB) and stable h_FE over −55 °C to +125 °C maintain regulation accuracy across environmental extremes.

Use Scenario: Converting thermistor voltage divider output into amplified analog signal for ADC input.

IC Role / Device Role / Timing Role: DC-coupled common-emitter amplifier with fixed-gain bias network.

Use Value: Tight h_FE binning (420–800) ensures consistent gain calibration across production batches without per-unit trimming.

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/SNR	Same h_FE range (420–800) but in SOT323 package (smaller footprint, higher thermal resistance).	Used where board space is constrained but thermal margin is relaxed; not drop-in due to different land pattern.	Select when PCB real estate is critical and power dissipation remains <100 mW.
MMBT3904LT1G	Lower h_FE (100–300), higher V_CEO (40 V), identical SOT23 package and pinout.	Preferred in legacy designs requiring proven qualification history; less gain headroom for low-base-drive scenarios.	Choose when compatibility with existing MMBT3904-based layouts is mandatory and gain >300 is not required.

Compared with BC847C/SNR, BC847BW/SNR trades thermal performance for size reduction, while MMBT3904LT1G offers broader industry adoption but lower gain consistency - making BC847C/SNR optimal for new designs prioritizing high h_FE and thermal predictability in compact SOT23 layouts.

Availability

BC847C/SNR is available at Aetrix Electronics and suitable for LED driver biasing, microcontroller GPIO expansion, linear voltage regulator feedback, and temperature sensor interface applications requiring stable component supply and consistent h_FE binning.

Supply support for BC847C/SNR 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 for automotive, industrial, mobile, and computing markets.

The BC847x series belongs to Nexperia's general-purpose discrete portfolio, engineered for cost-effective, robust performance in high-mix manufacturing environments where SMT yield, thermal predictability, and gain consistency are critical.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 100 mA (single pulse, t_p ≤ 1 ms), but continuous operation must limit I_B to ensure junction temperature stays below 150 °C. At I_C = 100 mA and h_FE = 420, I_B ≈ 238 µA; practical design uses 1–5× that value for saturation margin, resulting in ≤ 1.2 mA continuous I_B with adequate PCB copper area.

Is BC847C/SNR qualified for automotive applications?

No. Per Nexperia's revision history (Rev. 13, July 2022), the BC847x series is explicitly marked as non-automotive qualified. Automotive-grade equivalents - such as BC847C-Q - undergo additional AEC-Q101 stress testing and are separately specified; BC847C/SNR is intended for industrial, consumer, and computing applications only.

How does h_FE vary with temperature and collector current?

h_FE increases with temperature: typical values rise ~1.5× from −55 °C to +150 °C at fixed I_C. It also peaks near I_C = 2–10 mA (e.g., 520 at 2 mA, dropping to ~200 at 100 mA). Figure 10 in the datasheet confirms this nonlinearity, requiring bias network verification across the full operating temperature and current range.

Can BC847C/SNR replace BC847B in an existing design?

Yes, with caution: BC847C has higher minimum h_FE (420 vs. 200), which may cause overdrive in base-biased amplifier stages or unintended saturation in switching circuits. Verify V_CE and I_B margins; reduce base resistor value if needed to maintain desired operating point, especially in linear applications or high-temperature environments.

BC847C/SNR 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:: Obsolete

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:: 420 @ 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

BC847C/SNR FAQ

1.How can I place an order for BC847C/SNR through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847C/SNR 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 BC847C/SNR reliable?

The price and inventory of BC847C/SNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847C/SNR is usually 5 days.

3.What payment methods are accepted for BC847C/SNR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847C/SNR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847C/SNR?

BC847C/SNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847C/SNR 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 BC847C/SNR?

For technical support, including BC847C/SNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847C/SNR requirements.

6.How does Aetrix verify that BC847C/SNR is sourced from the original manufacturer or authorized distributors?

All BC847C/SNR 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 BC847C/SNR meets industry standards.

7.What is the process for return or replacement of BC847C/SNR?

All BC847C/SNR units undergo pre-shipment inspection (PSI). If there is an issue with BC847C/SNR, 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 BC847C/SNR part is unused and in its original packaging.

Return procedure for BC847C/SNR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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