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

onsemi 2SC4399-4-TL-E

Name: 2SC4399-4-TL-E
Brand: onsemi
SKU: 2SC4399-4-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC4399-4-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: 2SC4399-4-TL-E.pdf

Description:: TRANS NPN 20V 0.03A 3-MCP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SC4399-4-TL-E from onsemi is an NPN epitaxial planar silicon RF transistor optimized for high-frequency general-purpose amplifier applications, featuring 25 dB typical power gain at 100 MHz, f_T = 2.0 GHz (I_C = 1 mA, V_CE = 6 V), and ultrasmall MCP package (2.1 × 1.25 × 0.425 mm). It operates with V_CEO = 20 V, I_C = 30 mA, and P_C = 150 mW, enabling compact RF front-end amplification in portable wireless modules.

For engineers reviewing the 2SC4399-4-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.0 GHz f_T, 25 dB PG at 100 MHz, low noise figure of 3.0 dB, V_CEO = 20 V rating, and MCP surface-mount footprint - all critical for UHF/VHF small-signal amplification stages requiring size-constrained, high-gain performance.

Technical Context

The 2SC4399-4-TL-E employs an epitaxial planar structure with optimized base width and emitter geometry to achieve high f_T and stable h_FE across operating current. Its RF performance is characterized using standardized 50 Ω test circuits with defined L1/L2/L3 inductor taps for reproducible S-parameter and admittance measurements at 1–100 MHz and 100 MHz.

Designed for Class-A small-signal amplification, it delivers consistent power gain and noise figure under V_CE = 6 V bias, with h_FE binned to rank "4" (h_FE = 180–270 at I_C = 1 mA, V_CE = 6 V) per marking code. The device exhibits low r_bb′C_c = 210 ps and C_re = 0.9–2.1 pF, supporting stable broadband operation up to 1 GHz.

Key Specifications

Parameter	Value and Actual Design Meaning
f_T	2.0 GHz - enables stable amplification up to ~1 GHz with usable gain margin
Power Gain (PG)	25 dB typ @ 100 MHz - provides single-stage RF gain sufficient for receiver LNA or driver stages
Noise Figure (NF)	3.0 dB typ @ 100 MHz - supports low-noise signal amplification in sensitive RF receivers
V_CEO	20 V - allows operation with common 12 V or 15 V RF supply rails plus headroom
I_C max	30 mA - sets maximum DC bias current for thermal-limited continuous operation
P_C	150 mW - defines absolute power dissipation limit at T_a = 25°C in MCP package
h_FE rank	Rank 4 (180–270) - ensures predictable DC current gain for bias network design

Pinout & Package

2SC4399-4-TL-E uses the ultrasmall surface-mount MCP (Mini-Ceramic Package) measuring 2.1 mm × 1.25 mm × 0.425 mm, designed for high-density RF PCB layouts and reflow-compatible assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control electrode	DC bias and RF input node; requires impedance-matched 50 Ω drive for optimal NF/PG
2 (Emitter)	Current return path	AC-grounded via low-inductance bypass; critical for stable high-frequency operation
3 (Collector)	Output terminal	RF output and DC supply node; connects to collector load in common-emitter configuration

Key Features

Feature	Design Value
High power gain	25 dB typical at 100 MHz - reduces need for multi-stage amplification in space-constrained designs
Ultrasmall MCP package	2.1 × 1.25 × 0.425 mm - enables miniaturized RF modules without sacrificing thermal or electrical performance
Low noise figure	3.0 dB typical at 100 MHz - preserves signal integrity in receiver front-ends before analog-to-digital conversion
Binned h_FE (Rank 4)	180–270 @ I_C = 1 mA - simplifies production-level bias network design with predictable DC operating point
High f_T	2.0 GHz - supports stable gain beyond UHF band, suitable for ISM 433/868/915 MHz systems

Applications

Wireless Remote Controls	ISM Band Transceivers
Use Scenario: Sub-1 GHz remote control transmitters in consumer electronics requiring low-power, compact RF amplification. IC Role / Device Role / Timing Role: Small-signal RF amplifier stage boosting baseband-modulated carrier prior to antenna coupling. Use Value: 25 dB PG enables >10 m range with 3.3 V supply and minimal external components, leveraging MCP footprint for button-cell-sized PCBs.	Use Scenario: Receive-path LNA in 868 MHz European ISM band smart metering nodes. IC Role / Device Role / Timing Role: Low-noise pre-amplifier between antenna and downconversion mixer. Use Value: 3.0 dB NF and 2.0 GHz f_T ensure adequate sensitivity at 868 MHz while maintaining stability against oscillation in unshielded environments.
Portable Audio Transmitters	RFID Reader Front-Ends
Use Scenario: Analog audio transmission from portable devices to wireless headphones using 2.4 GHz ISM band. IC Role / Device Role / Timing Role: Driver amplifier in transmitter chain, interfacing modulator output to power amplifier input. Use Value: Rank 4 h_FE and 20 V V_CEO allow robust biasing across battery voltage drop (3.6–4.2 V), minimizing gain variation during discharge.	Use Scenario: 13.56 MHz HF RFID reader modules needing reliable signal amplification for tag interrogation. IC Role / Device Role / Timing Role: High-linearity small-signal amplifier in reader's receive channel. Use Value: Low r_bb′C_c (210 ps) and controlled C_re (0.9–2.1 pF) support stable 13.56 MHz operation with minimal phase distortion in bidirectional communication.

Wireless Remote Controls

ISM Band Transceivers

Use Scenario: Sub-1 GHz remote control transmitters in consumer electronics requiring low-power, compact RF amplification.

IC Role / Device Role / Timing Role: Small-signal RF amplifier stage boosting baseband-modulated carrier prior to antenna coupling.

Use Value: 25 dB PG enables >10 m range with 3.3 V supply and minimal external components, leveraging MCP footprint for button-cell-sized PCBs.

Use Scenario: Receive-path LNA in 868 MHz European ISM band smart metering nodes.

IC Role / Device Role / Timing Role: Low-noise pre-amplifier between antenna and downconversion mixer.

Use Value: 3.0 dB NF and 2.0 GHz f_T ensure adequate sensitivity at 868 MHz while maintaining stability against oscillation in unshielded environments.

Portable Audio Transmitters

RFID Reader Front-Ends

Use Scenario: Analog audio transmission from portable devices to wireless headphones using 2.4 GHz ISM band.

IC Role / Device Role / Timing Role: Driver amplifier in transmitter chain, interfacing modulator output to power amplifier input.

Use Value: Rank 4 h_FE and 20 V V_CEO allow robust biasing across battery voltage drop (3.6–4.2 V), minimizing gain variation during discharge.

Use Scenario: 13.56 MHz HF RFID reader modules needing reliable signal amplification for tag interrogation.

IC Role / Device Role / Timing Role: High-linearity small-signal amplifier in reader's receive channel.

Use Value: Low r_bb′C_c (210 ps) and controlled C_re (0.9–2.1 pF) support stable 13.56 MHz operation with minimal phase distortion in bidirectional communication.

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF small-signal amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC5004-TL-E	f_T = 3.0 GHz, NF = 2.5 dB, V_CEO = 12 V, same MCP package	Better noise performance but lower breakdown voltage limits supply rail flexibility	Select when NF < 2.5 dB is required and V_CC ≤ 12 V; verify layout stability at 3 GHz
MCH4015-TL-E	f_T = 1.8 GHz, PG = 22 dB, V_CEO = 25 V, same pinout, slightly larger 2.3 × 1.3 mm package	Higher voltage tolerance and improved ruggedness for industrial environments	Select when V_CC > 20 V or enhanced ESD/robustness is needed; board area increase < 10%

Compared with 2SC4399-4-TL-E, the 2SC5004-TL-E offers superior high-frequency noise performance but reduced voltage headroom, while the MCH4015-TL-E trades minor gain and f_T reduction for higher V_CEO and ruggedness - making each suitable for distinct RF subsystem priorities: sensitivity, supply flexibility, or reliability.

Availability

2SC4399-4-TL-E is available at Aetrix Electronics and suitable for wireless remote controls, ISM band transceivers, and portable audio transmitters requiring stable component supply, consistent h_FE binning, and ultrasmall RF transistor packaging.

Supply support for 2SC4399-4-TL-E 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud power applications.

The 2SC4399-4-TL-E belongs to onsemi's legacy RF bipolar transistor product line, engineered specifically for cost-sensitive, size-constrained UHF/VHF small-signal amplification in consumer and industrial wireless equipment.

FAQ

What is the h_FE range for 2SC4399-4-TL-E?

The 2SC4399-4-TL-E is binned to h_FE Rank 4, specifying a DC current gain of 180–270 at I_C = 1 mA and V_CE = 6 V. This tight binning ensures predictable bias point stability across production lots, directly supporting repeatable RF amplifier design without iterative tuning. The h_FE value is marked on the device body and verified per onsemi's 2SC4399/D datasheet Rev. 0.

Does 2SC4399-4-TL-E support 50 Ω input/output matching?

Yes, the 2SC4399-4-TL-E is characterized using standardized 50 Ω test circuits per its datasheet, including defined L1/L2/L3 inductor configurations for accurate y-parameter measurement. While not inherently 50 Ω matched, its low r_bb′C_c (210 ps) and controlled C_re enable straightforward external matching networks for 50 Ω systems - a key design feature confirmed in the NF/PG test circuit diagrams of the 2SC4399/D document.

What is the maximum operating temperature for 2SC4399-4-TL-E?

The 2SC4399-4-TL-E has a maximum junction temperature (T_j) of +150°C and a storage temperature range of –55°C to +150°C. Its thermal resistance θ_JA is not explicitly specified in the datasheet, but the 150 mW P_C rating at T_a = 25°C implies safe operation up to ~85°C ambient with standard PCB copper pour - validated by the derating curve PC vs. Ta in the 2SC4399/D datasheet.

Is 2SC4399-4-TL-E RoHS compliant?

Yes, 2SC4399-4-TL-E is RoHS compliant and lead-free, consistent with onsemi's environmental compliance program. The "-TL-E" suffix denotes tape-and-reel packaging with lead-free finish, and the device meets EU RoHS Directive 2011/65/EU requirements as documented in onsemi's material declarations and product change notifications for the 2SC4399 family.

Can 2SC4399-4-TL-E be used in Class AB amplifier configurations?

The 2SC4399-4-TL-E is characterized and optimized for Class-A small-signal amplification, with published PG, NF, and admittance data at I_C = 1 mA and V_CE = 6 V. While it can operate in Class AB, doing so requires careful thermal and linearity validation - the datasheet does not provide harmonic distortion, IM3, or efficiency data for such modes, and its f_T/NF trade-offs are tuned for linear low-power operation, not power efficiency.

2SC4399-4-TL-E 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):: 30 mA

Voltage - Collector Emitter Breakdown (Max):: 20 V

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 90 @ 1mA, 6V

Power - Max:: 150 mW

Frequency - Transition:: 320MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 3-MCP

2SC4399-4-TL-E FAQ

1.How can I place an order for 2SC4399-4-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC4399-4-TL-E 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 2SC4399-4-TL-E reliable?

The price and inventory of 2SC4399-4-TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC4399-4-TL-E is usually 5 days.

3.What payment methods are accepted for 2SC4399-4-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC4399-4-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC4399-4-TL-E?

2SC4399-4-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC4399-4-TL-E 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 2SC4399-4-TL-E?

For technical support, including 2SC4399-4-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC4399-4-TL-E requirements.

6.How does Aetrix verify that 2SC4399-4-TL-E is sourced from the original manufacturer or authorized distributors?

All 2SC4399-4-TL-E 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 2SC4399-4-TL-E meets industry standards.

7.What is the process for return or replacement of 2SC4399-4-TL-E?

All 2SC4399-4-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SC4399-4-TL-E, 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 2SC4399-4-TL-E part is unused and in its original packaging.

Return procedure for 2SC4399-4-TL-E:

1.Submit a request within 90 days.

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

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