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

onsemi BC848AMTF

Name: BC848AMTF
Brand: onsemi
SKU: BC848AMTF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC848AMTF

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC848AMTF.pdf

Description:: TRANS NPN 30V 0.1A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC848AMTF from Fairchild Semiconductor is an NPN epitaxial silicon transistor in SOT-23 package, rated for 30 V V_CEO, 100 mA I_C, and 310 mW P_C, with h_FE range 110–220 at I_C = 2 mA, used in low-noise amplifier and general-purpose switching circuits.

For engineers reviewing the BC848AMTF datasheet, pinout, applications, or equivalent options, key selection factors include its V_CEO/V_CBO ratings, h_FE classification (A-grade), saturation voltage at defined drive conditions, noise figure (2 dB @ 1 kHz), and SOT-23 footprint compatibility in space-constrained analog and digital interface stages.

Technical Context

This discrete NPN transistor operates as a current-controlled switch or small-signal amplifier with fixed emitter-base and collector-base junction structures. Its DC current gain is binned per h_FE classification (A = 110–220), and it exhibits specified V_BE(sat) (700 mV @ I_C = 10 mA, I_B = 0.5 mA) and V_CE(sat) (200 mV under same conditions).

Designed for thick- and thin-film automatic insertion, the BC848AMTF supports stable operation up to 150°C junction temperature and delivers f_T = 300 MHz at V_CE = 5 V, I_C = 10 mA. Its Cob = 3.5–6 pF and Cib = 9 pF define high-frequency input/output impedance behavior in RF-coupled or broadband amplifier stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration.
I_C (DC)	100 mA - Continuous collector current limit defining maximum load drive capability.
P_C	310 mW - Power dissipation limit at T_A = 25°C, derating required above ambient.
h_FE	110–220 - DC current gain range at V_CE = 5 V, I_C = 2 mA, defining base drive sensitivity.
V_CE(sat)	200 mV @ I_C = 10 mA, I_B = 0.5 mA - Low saturation voltage enabling efficient switching in logic-level interfaces.
f_T	300 MHz - Transition frequency indicating usable bandwidth for small-signal amplification.
Noise Figure	2 dB @ V_CE = 5 V, I_C = 200 μA, R_G = 2 kΩ, f = 1 kHz - Confirmed low-noise performance for audio and sensor front-end use.

Pinout & Package

BC848AMTF is housed in a standard SOT-23 plastic surface-mount package with gull-wing leads, measuring 2.9 mm × 1.3 mm × 1.0 mm (L × W × H), optimized for automated placement and reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input	Receives forward-biased current to modulate collector current; requires current-limiting resistor in most bias networks.
2 (Emitter)	Reference terminal	Common return path for base and collector currents; tied to ground or signal reference in common-emitter topology.
3 (Collector)	Output terminal	Delivers amplified or switched current to load; voltage swing limited by V_CEO = 30 V rating.

Key Features

Feature	Design Value
Low-noise amplifier grade	2 dB noise figure at 1 kHz enables use in microphone preamps and sensor signal conditioning without added noise degradation.
h_FE binning (A-class)	Guaranteed 110–220 gain range ensures predictable base drive requirements across production lots.
SOT-23 tape-and-reel packaging	3000-unit reel format supports high-speed pick-and-place assembly in volume manufacturing environments.
Complementary PNP pairing	Direct complement to BC856AMTF–BC860AMTF series, enabling matched push-pull and differential pair designs.
Automated insertion compatibility	Standardized SOT-23 footprint and lead geometry validated for use in both thick-film and thin-film hybrid circuit assembly processes.

Applications

Audio Pre-amplifier Stage	Logic-Level Switch Driver
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors in portable audio devices. IC Role / Device Role / Timing Role: Small-signal NPN amplifier operating in common-emitter configuration with emitter degeneration. Use Value: 2 dB noise figure and 300 MHz f_T preserve signal integrity while supporting bandwidth up to 20 kHz with minimal distortion.	Use Scenario: Driving LED indicators, relay coils, or MOSFET gates from 3.3 V or 5 V microcontroller GPIO pins. IC Role / Device Role / Timing Role: General-purpose saturated switch with controlled turn-on/turn-off via base current limiting. Use Value: V_CE(sat) ≤ 200 mV at I_C = 10 mA minimizes power loss and heat generation in low-duty-cycle control applications.
Current Mirror Reference	Bandwidth-Limited Oscillator Core
Use Scenario: Forming matched current sources in analog ICs or discrete op-amp bias networks where gain matching matters. IC Role / Device Role / Timing Role: Active element in two-transistor current mirror topology with emitter resistors for thermal stability. Use Value: Tight h_FE binning (A-grade) and low I_CBO (15 nA) reduce mismatch error and leakage-induced drift over temperature.	Use Scenario: Constructing Colpitts or Hartley oscillators in VHF receiver local oscillators or clock recovery circuits. IC Role / Device Role / Timing Role: Active gain element sustaining oscillation at frequencies up to ~100 MHz using LC tank feedback. Use Value: 300 MHz f_T and 3.5–6 pF Cob support stable oscillation with predictable phase margin and start-up reliability.

Audio Pre-amplifier Stage

Logic-Level Switch Driver

Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors in portable audio devices.

IC Role / Device Role / Timing Role: Small-signal NPN amplifier operating in common-emitter configuration with emitter degeneration.

Use Value: 2 dB noise figure and 300 MHz f_T preserve signal integrity while supporting bandwidth up to 20 kHz with minimal distortion.

Use Scenario: Driving LED indicators, relay coils, or MOSFET gates from 3.3 V or 5 V microcontroller GPIO pins.

IC Role / Device Role / Timing Role: General-purpose saturated switch with controlled turn-on/turn-off via base current limiting.

Use Value: V_CE(sat) ≤ 200 mV at I_C = 10 mA minimizes power loss and heat generation in low-duty-cycle control applications.

Current Mirror Reference

Bandwidth-Limited Oscillator Core

Use Scenario: Forming matched current sources in analog ICs or discrete op-amp bias networks where gain matching matters.

IC Role / Device Role / Timing Role: Active element in two-transistor current mirror topology with emitter resistors for thermal stability.

Use Value: Tight h_FE binning (A-grade) and low I_CBO (15 nA) reduce mismatch error and leakage-induced drift over temperature.

Use Scenario: Constructing Colpitts or Hartley oscillators in VHF receiver local oscillators or clock recovery circuits.

IC Role / Device Role / Timing Role: Active gain element sustaining oscillation at frequencies up to ~100 MHz using LC tank feedback.

Use Value: 300 MHz f_T and 3.5–6 pF Cob support stable oscillation with predictable phase margin and start-up reliability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC848BMTF	Higher h_FE range (200–450) at same test conditions; otherwise identical ratings and package.	Better suited for low-base-drive applications like high-gain preamps or low-current switches where tighter gain control is needed.	Select BC848BMTF when higher current gain reduces base resistor values or improves noise margin in low-power bias networks.
MMBT3904LT1G	Same SOT-23 package; V_CEO = 40 V, h_FE = 100–300 (unbinned), V_CE(sat) = 200 mV @ I_C = 10 mA, but no guaranteed low-noise spec.	Broader availability and longer lifecycle, but lacks specified 2 dB noise figure for critical audio paths.	Choose MMBT3904LT1G for cost-sensitive, non-audio switching where gain consistency is secondary to supply chain resilience.

Compared with BC848BMTF and MMBT3904LT1G, the BC848AMTF provides verified low-noise performance and A-grade h_FE consistency ideal for precision analog signal paths, whereas alternatives trade off noise or gain binning for broader availability or higher voltage margin.

Availability

BC848AMTF is available at Aetrix Electronics and suitable for audio preamplifiers, logic-level switch drivers, current mirror references, and bandwidth-limited oscillator cores requiring stable component supply and consistent h_FE binning.

Supply support for BC848AMTF 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The BC848AMTF belongs to the BC846–BC850 family of general-purpose NPN transistors designed for reliable switching and low-noise amplification in consumer, industrial, and communications equipment.

FAQ

What is the maximum collector-emitter voltage rating for BC848AMTF?

The BC848AMTF has a maximum collector-emitter voltage (V_CEO) rating of 30 V at T_A = 25°C. This rating defines the upper limit of voltage that can be safely applied between collector and emitter with the base open. Exceeding this value risks avalanche breakdown and permanent device damage. Derating is required at elevated ambient temperatures per the datasheet thermal curves.

Does BC848AMTF have a specified noise figure, and under what conditions?

Yes, the BC848AMTF has a specified noise figure of 2 dB, measured at V_CE = 5 V, I_C = 200 μA, source resistance R_G = 2 kΩ, and frequency f = 1 kHz. This value applies specifically to the BC846–BC848 variants and confirms suitability for low-noise small-signal amplification tasks such as microphone preamplifiers or sensor front-ends.

What does the "A" suffix in BC848AMTF indicate?

The "A" suffix in BC848AMTF denotes the h_FE (DC current gain) classification bin, specifying a guaranteed range of 110–220 at V_CE = 5 V and I_C = 2 mA. This binning allows designers to select transistors with predictable base drive requirements and consistent gain behavior across production units.

Is BC848AMTF pin-compatible with other transistors in the BC846–BC850 family?

Yes, all members of the BC846–BC850 family-including BC848AMTF-share identical SOT-23 pinout (1 = Base, 2 = Emitter, 3 = Collector) and mechanical dimensions. This uniformity allows direct substitution within the family when electrical parameters like V_CEO, h_FE, and noise figure meet design requirements.

What is the typical transition frequency (f_T) of BC848AMTF, and how is it measured?

The typical transition frequency (f_T) of BC848AMTF is 300 MHz, measured under conditions of V_CE = 5 V, I_C = 10 mA, and f = 100 MHz. This parameter reflects the frequency at which the transistor's small-signal current gain drops to unity and indicates usable bandwidth for RF amplification or high-speed switching applications.

BC848AMTF Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

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):: 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:: SOT-23-3

BC848AMTF FAQ

1.How can I place an order for BC848AMTF through Aetrix?

Please submit a Request for Quotation (RFQ) for BC848AMTF 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 BC848AMTF reliable?

The price and inventory of BC848AMTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC848AMTF is usually 5 days.

3.What payment methods are accepted for BC848AMTF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC848AMTF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC848AMTF?

BC848AMTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC848AMTF 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 BC848AMTF?

For technical support, including BC848AMTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC848AMTF requirements.

6.How does Aetrix verify that BC848AMTF is sourced from the original manufacturer or authorized distributors?

All BC848AMTF 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 BC848AMTF meets industry standards.

7.What is the process for return or replacement of BC848AMTF?

All BC848AMTF units undergo pre-shipment inspection (PSI). If there is an issue with BC848AMTF, 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 BC848AMTF part is unused and in its original packaging.

Return procedure for BC848AMTF:

1.Submit a request within 90 days.

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

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