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

Renesas 2SC4227-T1-A

Name: 2SC4227-T1-A
Brand: Renesas
SKU: 2SC4227-T1-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC4227-T1-A

Manufacturer:: Renesas

Category:: Bipolar RF Transistors

Package:: SC-70, SOT-323

Datasheet:: 2SC4227-T1-A.pdf

Description:: RF TRANSISTOR FOR HIGH FREQUENCY

Quantity:: RFQ Add To RFQ list

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Inventory:93,000

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Product details

Overview

2SC4227-T1-A from Renesas Electronics is an NPN epitaxial silicon RF transistor designed for VHF/UHF low-noise amplification at 1 GHz, with NF = 1.4 dB TYP., |S₂₁e|² = 12 dB TYP., fₜ = 7.0 GHz TYP., V_CEO = 10 V, and I_C = 65 mA MAX - used in portable radio front-ends and satellite TV tuners.

For engineers reviewing the 2SC4227-T1-A datasheet, 2SC4227-T1-A pinout, 2SC4227-T1-A application, or 2SC4227-T1-A equivalent, key selection criteria include low-noise performance at 1 GHz, 3-pin super minimold (SC-70) surface-mount compatibility, DC bias stability at V_CE = 3 V / I_C = 7 mA, and thermal derating per free-air P_tot = 150 mW.

Technical Context

The 2SC4227-T1-A operates as a single-stage RF amplifier in common-emitter configuration, optimized for narrowband VHF/UHF gain blocks where noise figure and insertion gain are jointly constrained. Its f_T of 7.0 GHz supports stable 1 GHz operation with high h_FE (40–240) and low C_re (0.45 pF TYP.) under V_CB = 3 V.

It uses epitaxial base construction to achieve low base resistance and controlled junction capacitance, enabling repeatable S-parameter behavior across production lots. The device requires external bias network design for optimal noise matching, as its minimum noise impedance differs from maximum gain impedance.

Key Specifications

Parameter	Value and Actual Design Meaning
Noise Figure	1.4 dB TYP. @ 1 GHz, defines minimum detectable signal level in receiver LNA stages
Insertion Power Gain	12 dB TYP. @ 1 GHz, enables single-transistor gain sufficient for IF stage drive without cascading
Gain Bandwidth Product	7.0 GHz TYP., confirms usable gain margin above 1 GHz for harmonic suppression and layout tolerance
Collector-Emitter Voltage	10 V MAX, sets absolute supply rail limit for bias network design and transient protection
Collector Current	65 mA MAX, constrains thermal design and quiescent power in continuous-wave operation
Reverse Transfer Capacitance	0.45 pF TYP. @ 1 MHz, determines Miller effect magnitude and stability compensation requirements
DC Current Gain	40–240 (R33–R35 ranks), impacts bias resistor tolerance sensitivity and temperature drift of operating point

Pinout & Package

2SC4227-T1-A uses the 3-pin super minimold package (EIAJ SC-70), measuring 2.1 mm × 1.25 mm × 0.9 mm, with gull-wing leads for reflow-compatible surface mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Reference node for bias network; must be low-inductance path to ground for RF stability
2	Base	High-impedance control input; requires DC blocking and RF matching network for noise optimization
3	Collector	RF output node; connects to collector load impedance and DC feed choke for active biasing

Key Features

Feature	Design Value
Low-noise amplification	NF = 1.4 dB TYP. at 1 GHz enables reception of weak terrestrial broadcast signals in compact tuners
High-frequency gain	\|S₂₁e\|² = 12 dB TYP. at 1 GHz reduces need for additional gain stages in UHF front-end designs
Surface-mount packaging	SC-70 footprint allows PCB area reduction vs. SOT-23 while maintaining thermal performance
Controlled h_FE ranking	R33/R34/R35 binning (40–240) supports consistent bias point selection across production batches

Applications

Portable Radio Front-End	Satellite TV Tuner LNA
Use Scenario: Amplifying weak VHF/UHF signals in handheld DAB/FM receivers with battery-limited power budget. IC Role / Device Role / Timing Role: Low-noise RF amplifier in first gain stage before mixer, operating at 3 V supply. Use Value: 1.4 dB NF preserves signal-to-noise ratio critical for digital audio decoding under marginal signal conditions.	Use Scenario: First-stage amplification in Ku-band satellite TV tuner modules receiving 950–2150 MHz IF signals. IC Role / Device Role / Timing Role: Single-transistor LNA configured for 1 GHz reference frequency band with fixed bias. Use Value: 12 dB \|S₂₁e\|² gain ensures adequate headroom before subsequent filtering and downconversion stages.
ISM Band Sensor Transceiver	Wireless Microphone Preamp
Use Scenario: 2.4 GHz ISM-band sensor node transmitter requiring low-power, low-noise upconversion driver. IC Role / Device Role / Timing Role: Buffer amplifier between VCO and PA input, biased at I_C = 7 mA for linearity/noise trade-off. Use Value: 0.45 pF C_re minimizes feedback-induced instability when driving wideband power amplifiers.	Use Scenario: Audio-frequency RF carrier preamplifier in analog wireless microphone systems operating near 174–216 MHz. IC Role / Device Role / Timing Role: High-gain, low-distortion RF amplifier stage preceding crystal oscillator modulation circuitry. Use Value: h_FE range of 40–240 supports factory calibration of gain flatness across production units.

Portable Radio Front-End

Satellite TV Tuner LNA

Use Scenario: Amplifying weak VHF/UHF signals in handheld DAB/FM receivers with battery-limited power budget.

IC Role / Device Role / Timing Role: Low-noise RF amplifier in first gain stage before mixer, operating at 3 V supply.

Use Value: 1.4 dB NF preserves signal-to-noise ratio critical for digital audio decoding under marginal signal conditions.

Use Scenario: First-stage amplification in Ku-band satellite TV tuner modules receiving 950–2150 MHz IF signals.

IC Role / Device Role / Timing Role: Single-transistor LNA configured for 1 GHz reference frequency band with fixed bias.

Use Value: 12 dB |S₂₁e|² gain ensures adequate headroom before subsequent filtering and downconversion stages.

ISM Band Sensor Transceiver

Wireless Microphone Preamp

Use Scenario: 2.4 GHz ISM-band sensor node transmitter requiring low-power, low-noise upconversion driver.

IC Role / Device Role / Timing Role: Buffer amplifier between VCO and PA input, biased at I_C = 7 mA for linearity/noise trade-off.

Use Value: 0.45 pF C_re minimizes feedback-induced instability when driving wideband power amplifiers.

Use Scenario: Audio-frequency RF carrier preamplifier in analog wireless microphone systems operating near 174–216 MHz.

IC Role / Device Role / Timing Role: High-gain, low-distortion RF amplifier stage preceding crystal oscillator modulation circuitry.

Use Value: h_FE range of 40–240 supports factory calibration of gain flatness across production units.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN RF transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC5004-T1-A	f_T = 12 GHz, NF = 1.2 dB @ 1 GHz, V_CEO = 12 V, same SC-70 package	Higher gain and lower noise support more demanding receiver architectures with tighter dynamic range	Select when system-level NF budget requires sub-1.3 dB and supply voltage exceeds 10 V
MCH4012-TL-E	f_T = 5.5 GHz, NF = 1.6 dB @ 1 GHz, P_tot = 200 mW, SOT-323 package	Higher power dissipation enables higher I_C bias for improved linearity in broadband applications	Select when thermal management allows larger footprint and third-order intercept improvement is prioritized over minimal NF

Compared with 2SC4227-T1-A, the 2SC5004-T1-A delivers lower noise and higher bandwidth at elevated supply voltage, while the MCH4012-TL-E trades some noise performance for greater thermal headroom and linearity in wider-bandwidth deployments.

Availability

2SC4227-T1-A is available at Aetrix Electronics and suitable for portable radio front-ends, satellite TV tuners, and ISM-band sensor transceivers requiring stable component supply and long-term obsolescence management.

Supply support for 2SC4227-T1-A 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and RF components.

The 2SC4227-T1-A belongs to Renesas' legacy RF transistor product line targeting cost-sensitive, high-volume consumer wireless applications with emphasis on VHF/UHF noise and gain performance.

FAQ

What is the maximum operating frequency supported by the 2SC4227-T1-A?

The 2SC4227-T1-A has a gain-bandwidth product (f_T) of 7.0 GHz TYP., indicating it maintains useful gain up to approximately 1–2 GHz in practical amplifier configurations. Its electrical characteristics are specified at 1 GHz, where it delivers 12 dB insertion gain and 1.4 dB noise figure - making it optimized for VHF/UHF bands rather than microwave frequencies beyond 2 GHz.

Does the 2SC4227-T1-A require external matching networks for stable 1 GHz operation?

Yes, the 2SC4227-T1-A requires external input/output matching networks to achieve both minimum noise figure and maximum stable gain simultaneously. Its S-parameters show that the optimum noise impedance differs from the conjugate match impedance; therefore, designers must implement separate noise-matching (for LNA input) and gain-matching (for output) circuits based on measured or simulated data from the official S2P files provided by Renesas.

What is the meaning of the "-T1-A" suffix in 2SC4227-T1-A?

The "-T1-A" suffix denotes tape-and-reel packaging: "T1" indicates 3,000 pieces per reel on 8 mm embossed tape, and "A" specifies that Pin 3 (Collector) faces the perforation side of the tape - a standard orientation for automated pick-and-place assembly. This distinguishes it from the non-reel "2SC4227" (50 pcs) and "2SC4227-T1" (same reel format without orientation marking).

Can the 2SC4227-T1-A be used in automotive applications?

No - the 2SC4227-T1-A is rated as a "Standard" quality grade device per Renesas documentation, intended for consumer electronics such as radios and tuners. It is not qualified for automotive use, which requires "High Quality" grade parts with extended temperature range, AEC-Q101 qualification, and enhanced reliability testing. Using 2SC4227-T1-A in automotive environments violates Renesas' defined application scope and voids warranty coverage.

How does h_FE variation affect bias stability in the 2SC4227-T1-A?

h_FE variation (40–240 across R33–R35 ranks) directly impacts DC operating point stability: a ±50% h_FE shift can cause >20% change in collector current under fixed-base-bias conditions. To maintain I_C = 7 mA across lots, designers must use emitter degeneration resistors or voltage-divider bias with bypassed emitter resistor - especially critical in temperature-varying environments where h_FE further drifts with junction temperature.

2SC4227-T1-A Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Voltage - Collector Emitter Breakdown (Max):: 10V

Frequency - Transition:: 7GHz

Noise Figure (dB Typ @ f):: 1.4dB @ 1GHz

Gain:: 12dB

Power - Max:: 150mW

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 7mA, 3V

Current - Collector (Ic) (Max):: 65mA

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

2SC4227-T1-A FAQ

1.How can I place an order for 2SC4227-T1-A through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC4227-T1-A 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 2SC4227-T1-A reliable?

The price and inventory of 2SC4227-T1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC4227-T1-A is usually 5 days.

3.What payment methods are accepted for 2SC4227-T1-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC4227-T1-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC4227-T1-A?

2SC4227-T1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC4227-T1-A 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 2SC4227-T1-A?

For technical support, including 2SC4227-T1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC4227-T1-A requirements.

6.How does Aetrix verify that 2SC4227-T1-A is sourced from the original manufacturer or authorized distributors?

All 2SC4227-T1-A 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 2SC4227-T1-A meets industry standards.

7.What is the process for return or replacement of 2SC4227-T1-A?

All 2SC4227-T1-A units undergo pre-shipment inspection (PSI). If there is an issue with 2SC4227-T1-A, 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 2SC4227-T1-A part is unused and in its original packaging.

Return procedure for 2SC4227-T1-A:

1.Submit a request within 90 days.

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

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