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

Nexperia USA Inc. BC847A/SNVL

Name: BC847A/SNVL
Brand: Nexperia USA Inc.
SKU: BC847A/SNVL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847A/SNVL

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BC847A/SNVL.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC847A/SNVL 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 110–220 at V_CE = 5 V and I_C = 2 mA. It serves as a low-voltage switching or small-signal amplification device in consumer power management, LED driver bias networks, and sensor interface stages.

For engineers reviewing the BC847A/SNVL datasheet, BC847A/SNVL pinout, BC847A/SNVL application, or BC847A/SNVL equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, real-world use cases in discrete analog signal paths, and confirmed alternative transistors with documented h_FE and V_CE differences.

Technical Context

This transistor operates in active or saturation mode with base-emitter turn-on voltage of 580–700 mV at I_C = 2 mA and V_CE = 5 V, and exhibits collector-emitter saturation voltage ≤200 mV at I_C = 100 mA and I_B = 5 mA. Its f_T of 100 MHz supports audio-frequency amplification and fast digital switching up to ~10 MHz.

Thermal resistance R_th(j-a) is 500 K/W on FR4 PCB with single-sided copper, limiting continuous power dissipation to 250 mW at T_amb ≤ 25 °C. Absolute maximum ratings include V_CBO = 50 V, V_EBO = 6 V, and T_j = 150 °C - defining safe operating area boundaries for design margining.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; sets upper rail limit in low-side switch or amplifier stage.
I_C	100 mA - Continuous collector current rating; defines max load drive capability in linear or saturated operation.
h_FE	110–220 - DC current gain range at V_CE = 5 V, I_C = 2 mA; determines required base drive for target collector current.
V_CE(sat)	≤200 mV at I_C = 100 mA, I_B = 5 mA - Low saturation voltage minimizes conduction loss in switching applications.
f_T	100 MHz - Transition frequency confirms usable bandwidth for audio amplification and medium-speed logic interfacing.
R_th(j-a)	500 K/W - Junction-to-ambient thermal resistance on standard FR4; informs heatsinking needs for sustained 250 mW operation.

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads, 1.9 mm × 1.1 mm footprint, 0.45 mm lead pitch, and 0.9 mm height - optimized for high-density PCB layouts and reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input node; requires current-limited drive (e.g., via 10 kΩ resistor) to achieve specified h_FE-based collector current.
2	Emitter (E)	Reference node for biasing; connected to ground or low-impedance return path in common-emitter configurations.
3	Collector (C)	Output node carrying load current; routed to V_CC through load (e.g., LED, relay coil) in low-side switch topology.

Key Features

Feature	Design Value
Three h_FE selections (A/B/C)	Enables precise gain matching across production batches - BC847A (110–220) suits stable biasing where moderate gain consistency is required.
SOT23 package	Enables automated placement and reflow compatibility; footprint matches industry-standard 0.95 mm × 1.3 mm land pattern per JEDEC MO-203.
V_CE(sat) ≤ 200 mV	Reduces power loss in saturated switching - critical for battery-powered LED drivers and logic-level translators.
150 °C max junction temperature	Supports operation in industrial ambient environments (−65 °C to +150 °C) without derating below 25 °C ambient.

Applications

LED Current Control

Microcontroller GPIO Interface

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller outputs.

IC Role / Device Role / Timing Role: NPN low-side switch configured in common-emitter mode with base resistor limiting I_B.

Use Value: V_CE(sat) ≤ 200 mV ensures <1 mW conduction loss per LED, preserving battery life in portable devices.

Use Scenario: Level-shifting 3.3 V logic signals to control 5 V peripheral enable lines.

IC Role / Device Role / Timing Role: Digital switch translating MCU output to higher-voltage rail using emitter-follower or common-emitter inversion.

Use Value: h_FE ≥ 110 guarantees reliable saturation with 100 µA base drive, eliminating need for external buffer ICs.

Audio Pre-amplifier Stage

Temperature Sensor Bias Network

Use Scenario: Amplifying low-level electret microphone output (1–10 mV) before ADC input.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration resistor for linearity.

Use Value: f_T = 100 MHz provides >20 kHz bandwidth margin, ensuring flat response across full audio spectrum.

Use Scenario: Providing constant-current bias to silicon diode-based temperature sensors (e.g., LM35 internal junction).

IC Role / Device Role / Timing Role: Current source configured with collector load and base voltage divider for stable I_C ≈ 100 µA.

Use Value: Tight h_FE tolerance (110–220) enables predictable current setting within ±5% without trimming resistors.

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
BC847B/SNVL	h_FE = 200–450 (vs. 110–220), same V_CEO/I_C/package	Higher gain enables lower base drive in high-impedance sensor interfaces but increases sensitivity to temperature drift	Select when tighter I_C control is needed at low I_B, e.g., precision current sources
MMBT3904LT1G	h_FE = 100–300, V_CEO = 40 V (vs. 45 V), identical SOT23 footprint	Slightly lower breakdown margin limits use in 36 V automotive subsystems; otherwise functionally interchangeable	Choose for legacy designs already qualified with MMBT3904; verify V_CEO margin in 36–42 V rails

Compared with BC847B/SNVL and MMBT3904LT1G, BC847A/SNVL offers the narrowest h_FE spread for predictable DC biasing, optimal V_CEO headroom among SOT23 NPNs, and lowest V_CE(sat) in its gain class - making it preferred for battery-sensitive LED control and stable sensor excitation.

Availability

BC847A/SNVL is available at Aetrix Electronics and suitable for LED current control, microcontroller GPIO interfacing, audio pre-amplification, and temperature sensor bias networks requiring stable component supply and consistent h_FE performance.

Supply support for BC847A/SNVL 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 and industrial-grade components.

BC847A/SNVL belongs to the BC847x series - a family of general-purpose NPN transistors designed for cost-sensitive, space-constrained applications in consumer, industrial, and computing electronics where predictable gain and robust SMT manufacturability are essential.

FAQ

What is the maximum continuous collector current for BC847A/SNVL?

The absolute maximum continuous collector current is 100 mA at T_amb ≤ 25 °C on FR4 PCB with single-sided copper. Derating is required above 25 °C ambient - at 70 °C, max I_C drops to approximately 65 mA due to thermal limitations defined by R_th(j-a) = 500 K/W and P_tot = 250 mW.

Does BC847A/SNVL support automotive applications?

No. BC847A/SNVL is not automotive-qualified. The datasheet explicitly states non-automotive qualification (Rev. 13, Section 13). For automotive use, Nexperia offers the -Q qualified variants (e.g., BC847AQ), which undergo AEC-Q101 stress testing and have extended temperature and reliability validation.

How does the BC847A/SNVL marking code differ from BC847B/SNVL?

BC847A/SNVL is marked with "1E%", where "%" is a placeholder for manufacturing site code. BC847B/SNVL uses "1F%". These laser-marked codes are visible on the top surface of the SOT23 package and allow field-level identification of gain group without electrical testing.

Can BC847A/SNVL replace BC547 in existing designs?

Yes, with verification. Both share SOT23 footprint and similar V_CEO/I_C ratings, but BC847A has tighter h_FE (110–220 vs. BC547's 110–800) and lower V_CE(sat). Designers should confirm base resistor values maintain saturation under worst-case h_FE and check thermal performance, as BC847A's R_th(j-a) is 500 K/W versus BC547's typical 625 K/W.

BC847A/SNVL 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:: 110 @ 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

BC847A/SNVL FAQ

1.How can I place an order for BC847A/SNVL through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847A/SNVL 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 BC847A/SNVL reliable?

The price and inventory of BC847A/SNVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847A/SNVL is usually 5 days.

3.What payment methods are accepted for BC847A/SNVL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847A/SNVL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847A/SNVL?

BC847A/SNVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847A/SNVL 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 BC847A/SNVL?

For technical support, including BC847A/SNVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847A/SNVL requirements.

6.How does Aetrix verify that BC847A/SNVL is sourced from the original manufacturer or authorized distributors?

All BC847A/SNVL 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 BC847A/SNVL meets industry standards.

7.What is the process for return or replacement of BC847A/SNVL?

All BC847A/SNVL units undergo pre-shipment inspection (PSI). If there is an issue with BC847A/SNVL, 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 BC847A/SNVL part is unused and in its original packaging.

Return procedure for BC847A/SNVL:

1.Submit a request within 90 days.

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

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