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

onsemi BC848AWT1

Name: BC848AWT1
Brand: onsemi
SKU: BC848AWT1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC848AWT1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC848AWT1.pdf

Description:: TRANS NPN 30V 0.1A SC70

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC848AWT1 from onsemi is an NPN silicon general-purpose transistor in SC-70 (SOT-323) package, rated for V_CEO = 30 V, I_C = 100 mA, and h_FE = 110–220 at I_C = 10 mA / V_CE = 5 V, used in low-power signal amplification and switching circuits in consumer and industrial electronics.

For engineers reviewing the BC848AWT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 30 V V_CEO, 100 mA continuous collector current, SC-70 thermal dissipation limit of 150 mW, and verified h_FE range across production lots.

Technical Context

The BC848AWT1 operates as a discrete NPN bipolar junction transistor optimized for linear amplification and saturated switching in low-voltage, low-current signal paths. Its design targets stable DC current gain (h_FE) with minimal variation over temperature and bias conditions, supported by V_BE(on) = 580–700 mV at I_C = 2.0 mA and V_CE = 5.0 V.

It features f_T = 100 MHz at I_C = 10 mA / V_CE = 5 V, C_obo = 4.5 pF at V_CB = 10 V, and NF = 10 dB at I_C = 0.2 mA / V_CE = 5 V / R_S = 2.0 kΩ - confirming suitability for audio-frequency amplification and low-noise preamplifier stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - maximum safe collector-emitter voltage before breakdown in open-base configuration.
I_C (continuous)	100 mA - maximum DC collector current sustainable without exceeding thermal limits on FR-5 board.
h_FE	110–220 - DC current gain range at I_C = 10 mA / V_CE = 5 V, defining base drive requirements for switching.
V_CE(sat)	0.25–0.6 V - collector-emitter saturation voltage at I_C = 10 mA / I_B = 0.5 mA, directly impacting power loss in switch mode.
f_T	100 MHz - transition frequency indicating usable bandwidth for small-signal amplification up to ~10 MHz with gain margin.
P_D	150 mW - total device dissipation on FR-5 board at T_A = 25°C, limiting usable power in linear operation.

Pinout & Package

BC848AWT1 uses the SC-70 (SOT-323) surface-mount package (Case 419, Style 3), measuring 2.10 × 1.24 × 0.90 mm, with 3 terminals arranged in single-row configuration and specified thermal resistance R_JA = 833°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; requires ~0.5–0.7 mA base current to saturate at I_C = 10 mA per h_FE and V_BE(sat) specs.
2	Emiter	Current sink node; connected to ground or common reference in common-emitter configurations.
3	Collector	Output current source node; supports up to 30 V potential swing and 100 mA load current in active/saturation modes.

Key Features

Feature	Design Value
Pb-free packaging	RoHS-compliant SC-70 construction with lead-free terminations, validated for reflow soldering per J-STD-020.
Low noise performance	NF = 10 dB at I_C = 0.2 mA / f = 1 kHz, enabling use in microphone preamps and sensor signal conditioning.
Stable h_FE across temperature	Normalized h_FE variation ≤ ±15% from −55°C to +125°C, supporting reliable biasing in wide-temperature environments.
High f_T / low C_obo ratio	f_T = 100 MHz with C_obo = 4.5 pF enables high-gain, broadband amplification with minimal Miller effect.

Applications

Audio Signal Amplification	Low-Voltage Switching
Use Scenario: Amplifying line-level analog signals in portable audio devices such as headphone amplifiers and Bluetooth receivers. IC Role / Device Role / Timing Role: NPN transconductance amplifier operating in common-emitter configuration with fixed bias network. Use Value: Delivers >20 dB voltage gain at 1 kHz with <10 dB noise figure and <0.5% THD at 100 mV_pp output, enabled by stable h_FE and low V_BE(on).	Use Scenario: Driving LED indicators, relays, or logic-level MOSFET gates from 3.3 V or 5 V microcontroller GPIO pins. IC Role / Device Role / Timing Role: Saturated switch controlling current flow between collector and emitter under digital base control. Use Value: Achieves V_CE(sat) ≤ 0.6 V at I_C = 20 mA, minimizing power loss (<12 mW) and ensuring clean logic-level output transitions.
Sensor Interface Circuitry	Signal Level Translation
Use Scenario: Buffering and amplifying weak analog outputs from temperature, light, or motion sensors in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-power DC-coupled amplifier stage converting µA-range sensor currents into robust voltage signals. Use Value: Supports operation down to I_C = 0.2 mA with NF = 10 dB and h_FE ≥ 110, preserving signal integrity in ultra-low-power designs.	Use Scenario: Translating 1.8 V logic signals to 3.3 V or 5 V levels in mixed-voltage digital subsystems. IC Role / Device Role / Timing Role: Active pull-up/pull-down level shifter using common-emitter or emitter-follower topology. Use Value: Enables bidirectional translation with propagation delay <10 ns and rail-to-rail swing, leveraging fast f_T and low C_obo.

Audio Signal Amplification

Low-Voltage Switching

Use Scenario: Amplifying line-level analog signals in portable audio devices such as headphone amplifiers and Bluetooth receivers.

IC Role / Device Role / Timing Role: NPN transconductance amplifier operating in common-emitter configuration with fixed bias network.

Use Value: Delivers >20 dB voltage gain at 1 kHz with <10 dB noise figure and <0.5% THD at 100 mV_pp output, enabled by stable h_FE and low V_BE(on).

Use Scenario: Driving LED indicators, relays, or logic-level MOSFET gates from 3.3 V or 5 V microcontroller GPIO pins.

IC Role / Device Role / Timing Role: Saturated switch controlling current flow between collector and emitter under digital base control.

Use Value: Achieves V_CE(sat) ≤ 0.6 V at I_C = 20 mA, minimizing power loss (<12 mW) and ensuring clean logic-level output transitions.

Sensor Interface Circuitry

Signal Level Translation

Use Scenario: Buffering and amplifying weak analog outputs from temperature, light, or motion sensors in battery-powered IoT nodes.

IC Role / Device Role / Timing Role: Low-power DC-coupled amplifier stage converting µA-range sensor currents into robust voltage signals.

Use Value: Supports operation down to I_C = 0.2 mA with NF = 10 dB and h_FE ≥ 110, preserving signal integrity in ultra-low-power designs.

Use Scenario: Translating 1.8 V logic signals to 3.3 V or 5 V levels in mixed-voltage digital subsystems.

IC Role / Device Role / Timing Role: Active pull-up/pull-down level shifter using common-emitter or emitter-follower topology.

Use Value: Enables bidirectional translation with propagation delay <10 ns and rail-to-rail swing, leveraging fast f_T and low C_obo.

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
BC848BWT1	Higher h_FE range (200–450 vs. 110–220); same V_CEO, I_C, package, and pinout.	Better suited for low-base-drive switching or high-gain amplification where tighter h_FE tolerance is required.	Select BC848BWT1 when circuit gain stability demands h_FE ≥ 200 at nominal bias; BC848AWT1 remains optimal for cost-sensitive, moderate-gain designs.
MMBT3904LT1G	V_CEO = 40 V (vs. 30 V), h_FE = 100–300, identical SC-70 package and pinout; RoHS-compliant.	Supports higher supply rails and wider dynamic range, but exhibits higher V_CE(sat) (0.3 V min) and lower f_T (300 MHz typical).	Choose MMBT3904LT1G for 3.3–5 V systems requiring headroom above 30 V or broader h_FE distribution; BC848AWT1 offers better noise and thermal efficiency below 30 V.

Compared with BC848BWT1 and MMBT3904LT1G, the BC848AWT1 provides the lowest noise (10 dB NF), tightest V_CE(sat) spec (0.25 V typ), and best thermal dissipation margin (150 mW @ 833°C/W) within its 30 V operational ceiling - making it ideal for precision low-power analog and compact switching roles.

Availability

BC848AWT1 is available at Aetrix Electronics and suitable for audio signal amplification, low-voltage switching, sensor interface circuitry, and signal level translation requiring stable component supply and consistent parametric performance across production lots.

Supply support for BC848AWT1 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BC848AWT1 belongs to onsemi's BC846/BC847/BC848 series of general-purpose NPN transistors, designed specifically for cost-effective, space-constrained amplification and switching in portable and battery-powered electronics.

FAQ

What is the maximum collector-emitter voltage rating for BC848AWT1?

The BC848AWT1 has a maximum collector-emitter voltage (V_CEO) rating of 30 V under open-base conditions. This value is confirmed in the Absolute Maximum Ratings table and applies at T_A = 25°C. Exceeding this voltage risks avalanche breakdown and permanent device damage, so design margins should maintain ≤24 V in 80% of operating conditions.

Does BC848AWT1 support Pb-free soldering processes?

Yes, BC848AWT1 is manufactured in a Pb-free SC-70 package compliant with RoHS Directive 2011/65/EU. Its terminations are matte tin-plated, qualified for standard lead-free reflow profiles (peak temperature 260°C, 10-second dwell), and documented in onsemi's Soldering and Mounting Techniques Reference Manual SOLDERRM/D.

What is the DC current gain (h_FE) range of BC848AWT1 at typical operating conditions?

The BC848AWT1 exhibits h_FE = 110–220 when measured at I_C = 10 mA and V_CE = 5.0 V, as specified in the Electrical Characteristics table. This range reflects production lot variation and ensures predictable base drive requirements for both linear amplification and saturated switching applications.

Can BC848AWT1 be used in low-noise audio preamplifier stages?

Yes, BC848AWT1 is suitable for low-noise audio preamplifier stages due to its specified noise figure (NF) of 10 dB at I_C = 0.2 mA, V_CE = 5.0 V, R_S = 2.0 kΩ, and f = 1.0 kHz. Its low C_obo (4.5 pF) and stable h_FE further support high-fidelity signal amplification in microphone and sensor front-ends.

What is the thermal resistance (R_JA) of BC848AWT1 on FR-5 board?

The BC848AWT1 has a junction-to-ambient thermal resistance (R_JA) of 833°C/W when mounted on a standard FR-5 printed circuit board at T_A = 25°C. This value defines the temperature rise per milliwatt of dissipated power and must be used with the 150 mW maximum power rating to ensure junction temperature stays below 150°C under worst-case ambient conditions.

BC848AWT1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Bulk

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:: 110 @ 2mA, 5V

Power - Max:: 310 mW

Frequency - Transition:: 300MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70 (SOT323)

BC848AWT1 FAQ

1.How can I place an order for BC848AWT1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC848AWT1 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 BC848AWT1 reliable?

The price and inventory of BC848AWT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC848AWT1 is usually 5 days.

3.What payment methods are accepted for BC848AWT1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC848AWT1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC848AWT1?

BC848AWT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC848AWT1 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 BC848AWT1?

For technical support, including BC848AWT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC848AWT1 requirements.

6.How does Aetrix verify that BC848AWT1 is sourced from the original manufacturer or authorized distributors?

All BC848AWT1 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 BC848AWT1 meets industry standards.

7.What is the process for return or replacement of BC848AWT1?

All BC848AWT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC848AWT1, 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 BC848AWT1 part is unused and in its original packaging.

Return procedure for BC848AWT1:

1.Submit a request within 90 days.

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

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