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

Infineon Technologies BFS 17P E6433

Name: BFS 17P E6433
Brand: Infineon Technologies
SKU: BFS 17P E6433
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BFS 17P E6433

Manufacturer:: Infineon Technologies

Category:: Bipolar RF Transistors

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

Datasheet:: BFS 17P E6433.pdf

Description:: RF TRANS NPN 15V 1.4GHZ SOT23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BFS17P E6433 from Infineon is an NPN silicon RF transistor optimized for broadband amplification and mixing up to 1 GHz, with a transition frequency of 1.4 GHz, 3.5 dB minimum noise figure at 800 MHz, 21.5 dBm OIP3, and 10 dBm P-1dB output compression-used in sub-GHz receiver front-ends and low-power oscillator stages.

For engineers reviewing the BFS17P E6433 datasheet, BFS17P E6433 pinout, BFS17P E6433 application, or BFS17P E6433 equivalent, key selection criteria include noise performance at 2–20 mA collector bias, SOT23 thermal dissipation limits (280 mW), and verified 50 Ω transducer gain of 13 dB at 500 MHz under matched conditions.

Technical Context

This RF transistor operates as a high-frequency active device in small-signal amplification and frequency conversion circuits, supporting DC–1 GHz bandwidth with stable h_FE (40–150) across 2–25 mA collector current and V_CE = 1–5 V. Its low C_cb (0.55 pF typ.) and C_eb (0.9 pF typ.) enable wideband impedance matching.

The device uses epitaxial base construction for improved f_T consistency and low-noise operation, with specified Z_Sopt/Z_Lopt for OIP3 optimization and fixed 3-pin SOT23 configuration requiring external bias network design for stable Class-A operation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	15 V - maximum safe collector-emitter voltage before breakdown under open-base condition
f_T	1.4 GHz - usable gain-bandwidth limit for small-signal amplification at I_C = 2 mA, V_CE = 5 V
NF_min	3.5 dB - lowest achievable noise figure at 800 MHz with 50 Ω source impedance and I_C = 2 mA
OIP3	21.5 dBm - third-order intercept point indicating linearity headroom in mixer or driver stages
P-1dB	10 dBm - output power level where gain compresses by 1 dB, defining usable linear output range
P_tot	280 mW - maximum continuous power dissipation at T_S ≤ 95 °C, limiting PCB copper area and thermal relief design
C_cb	0.55 pF - collector-base junction capacitance affecting high-frequency feedback and stability margin

Pinout & Package

Package: SOT23 - surface-mount plastic package with 1.3 mm × 2.9 mm footprint, 1.1 mm height, and gull-wing leads; RoHS-compliant, Pb-free, rated for reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Marked "B")	Base	Control electrode for forward-biased junction; requires external bias resistor or active drive network
2 (Marked "E")	Emitter	Common reference node; typically grounded in common-emitter amplifier configurations
3 (Marked "C")	Collector	Output terminal carrying amplified RF signal; connected to matching network and DC feed choke

Key Features

Feature	Design Value
Low-noise RF amplification	3.5 dB NF_min at 800 MHz enables sensitive receiver front-end use without cascaded LNA penalty
High linearity	21.5 dBm OIP3 supports multi-tone signals in IF/RF mixers without significant intermodulation distortion
Stable gain over bias range	h_FE = 40–150 across I_C = 2–25 mA ensures predictable bias point selection in production designs
Thermally robust SOT23	R_thJS ≤ 195 K/W allows 280 mW dissipation with minimal board-level thermal management

Applications

Wireless Remote Controls

ISM Band Transceivers

Use Scenario: Sub-GHz ASK/OOK transmitter final stage in garage door openers and key fobs operating at 315/433 MHz.

IC Role / Device Role / Timing Role: Low-power RF driver amplifying modulated baseband signal to +10 dBm output before antenna coupling.

Use Value: 10 dBm P-1dB and 21.5 dBm OIP3 ensure clean spectral emission meeting FCC Part 15 mask requirements.

Use Scenario: Receiver LNA in 868/915 MHz industrial sensor nodes with 20 mA supply budget.

IC Role / Device Role / Timing Role: First-stage low-noise amplifier with 3.5 dB NF_min, matched to 50 Ω antenna interface.

Use Value: Enables -115 dBm sensitivity at 1.2 Mbps data rate without additional gain stages.

FM Broadcast Receivers

Low-Power Oscillators

Use Scenario: RF preselector amplifier in portable FM radios covering 76–108 MHz band.

IC Role / Device Role / Timing Role: Tuned common-emitter amplifier with LC input/output matching networks.

Use Value: 1.4 GHz f_T provides >10× bandwidth margin ensuring flat gain response across full FM band.

Use Scenario: Colpitts oscillator core in battery-powered telemetry beacons at 433 MHz.

IC Role / Device Role / Timing Role: Active sustaining element providing phase-correct gain at resonant frequency.

Use Value: Low C_cb (0.55 pF) and C_eb (0.9 pF) minimize frequency pulling and improve long-term stability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BFP181	Higher f_T (2.5 GHz), lower NF_min (2.2 dB), but higher P_tot (400 mW) and SOT143 package	Requires larger PCB footprint and different thermal layout; better suited for 2 GHz ISM bands	Select when >1.5 GHz operation or sub-2.5 dB noise is required; verify SOT143 land pattern compatibility
MRF581	Lower f_T (800 MHz), higher P-1dB (+13 dBm), same SOT23 package, but non-RoHS legacy variant	Not suitable for new designs targeting RoHS compliance; limited availability post-2020	Only consider for legacy repair or drop-in replacement where RoHS exemption applies

Compared with BFP181 and MRF581, BFS17P E6433 delivers optimal balance of noise, linearity, and thermal efficiency in RoHS-compliant SOT23 for sub-GHz consumer and industrial RF stages-without over-spec'ing f_T or compromising manufacturability.

Availability

BFS17P E6433 is available at Aetrix Electronics and suitable for wireless remote controls, ISM band transceivers, and FM broadcast receivers requiring stable component supply, consistent parametric performance across production lots, and full traceability to Infineon wafer lot codes.

Supply support for BFS17P E6433 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and RF components, with global R&D centers and ISO/TS 16949-certified fabrication facilities.

The BFS series targets cost-sensitive, high-volume RF front-end applications in consumer electronics and industrial IoT, emphasizing low-noise, high-linearity discrete transistors in standard SMT packages for rapid integration.

FAQ

What is the recommended bias point for lowest noise figure?

For minimum noise figure (3.5 dB), operate at I_C = 2 mA and V_CE = 5 V with a 50 Ω source impedance. The datasheet specifies Z_Sopt ≈ 15 + j10 Ω at this condition-external matching is required to transform 50 Ω to Z_Sopt for optimal noise performance.

Can BFS17P E6433 be used in Class AB amplifier configurations?

No-BFS17P E6433 is characterized and qualified only for Class A small-signal operation. Its h_FE roll-off above 25 mA and thermal limits (280 mW) make it unsuitable for Class AB switching or high-efficiency modes; use only within 1–20 mA I_C range with DC bias stabilization.

Is the SOT23 package lead-free and compatible with standard reflow profiles?

Yes-BFS17P E6433 uses a Pb-free, RoHS-compliant SOT23 package qualified for JEDEC J-STD-020D reflow, with peak temperature tolerance up to 260 °C for 10 seconds. No special flux or underfill is required for standard PCB assembly.

How does ESD sensitivity affect handling and PCB layout?

BFS17P E6433 is classified as Class 1B ESD-sensitive (≤ 250 V HBM); always use grounded wrist straps and dissipative mats during handling. On PCB, minimize trace length to base/emitter, avoid floating pins, and place 100 nF ceramic decoupling near collector supply to suppress transient coupling.

BFS 17P E6433 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Voltage - Collector Emitter Breakdown (Max):: 15V

Frequency - Transition:: 1.4GHz

Noise Figure (dB Typ @ f):: 3.5dB ~ 5dB @ 800MHz

Gain:: -

Power - Max:: 280mW

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 2mA, 1V

Current - Collector (Ic) (Max):: 25mA

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23

BFS 17P E6433 FAQ

1.How can I place an order for BFS 17P E6433 through Aetrix?

Please submit a Request for Quotation (RFQ) for BFS 17P E6433 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 BFS 17P E6433 reliable?

The price and inventory of BFS 17P E6433 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BFS 17P E6433 is usually 5 days.

3.What payment methods are accepted for BFS 17P E6433?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BFS 17P E6433 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BFS 17P E6433?

BFS 17P E6433 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BFS 17P E6433 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 BFS 17P E6433?

For technical support, including BFS 17P E6433 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BFS 17P E6433 requirements.

6.How does Aetrix verify that BFS 17P E6433 is sourced from the original manufacturer or authorized distributors?

All BFS 17P E6433 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 BFS 17P E6433 meets industry standards.

7.What is the process for return or replacement of BFS 17P E6433?

All BFS 17P E6433 units undergo pre-shipment inspection (PSI). If there is an issue with BFS 17P E6433, 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 BFS 17P E6433 part is unused and in its original packaging.

Return procedure for BFS 17P E6433:

1.Submit a request within 90 days.

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

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