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

Diodes Incorporated BFS17HTC

Name: BFS17HTC
Brand: Diodes Incorporated
SKU: BFS17HTC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BFS17HTC

Manufacturer:: Diodes Incorporated

Category:: Bipolar RF Transistors

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

Datasheet:: BFS17HTC.pdf

Description:: RF TRANS NPN 15V 1.3GHZ SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:4,423

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Product details

Overview

BFS17HTC from NXP Semiconductors is an NPN silicon planar RF transistor in SOT23 package, rated for V_CEO = 15 V, I_C = 25 mA, and f_T = 1.3 GHz (typ.) at I_C = 2.0 mA, V_CE = 5.0 V - used in VHF/UHF low-noise amplifier stages of FM radio receivers and wireless microphones.

For engineers reviewing the BFS17HTC datasheet, BFS17HTC pinout, BFS17HTC application, or BFS17HTC equivalent, key selection criteria include its 4.5 dB noise figure at 500 MHz, 0.85 pF feedback capacitance, h_FE range of 70–200, and SOT23 thermal dissipation capability of 330 mW at T_amb = 25°C.

Technical Context

This device operates as a high-frequency small-signal amplifier with optimized gain-noise trade-off: h_FE ≥ 70 at I_C = 2.0 mA ensures stable biasing in Class-A LNA designs, while f_T ≥ 1.0 GHz supports operation up to 217 MHz intermodulation test frequencies. Its C_re = 0.85 pF and C_obo = 1.5 pF enable predictable matching network design at VHF bands.

The BFS17HTC features low V_EBO = 2.5 V and tight V_CEO/V_CBO ratings (15 V/25 V), indicating suitability for low-voltage, low-power RF front-ends where supply headroom is constrained - not intended for switching or power amplification.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	15 V - maximum safe collector-emitter voltage under DC bias; defines upper rail limit for single-supply VHF amplifier designs
f_T	1.3 GHz (typ.) at I_C=2 mA, V_CE=5 V - usable gain bandwidth for amplifiers up to ~200 MHz with margin
Noise Figure	4.5 dB at 500 MHz, I_C=2 mA, R_S=50 Ω - enables sensitive reception in battery-powered FM tuners
C_re	0.85 pF at V_CE=5 V, f=1 MHz - limits Miller effect; simplifies neutralization in narrowband VHF amps
P_tot	330 mW at T_amb=25°C - constrains continuous output power to <10 mW in linear operation
h_FE	70–200 at I_C=2 mA, V_CE=1 V - provides stable DC bias point across manufacturing lot variation

Pinout & Package

SOT23 plastic surface-mount package (3-pin, standard footprint), lead-free compatible, rated for operation from –55°C to +150°C junction temperature.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	DC return path; requires low-inductance ground connection to minimize noise coupling
2 (Base)	Control input	High-impedance node; sensitive to stray capacitance - routing must avoid parallel traces
3 (Collector)	Active output node	RF output port; connects to tuned collector load (e.g., parallel LC tank) for impedance matching

Key Features

Feature	Design Value
Low noise figure	4.5 dB at 500 MHz enables high-SNR signal recovery in weak-signal RF front-ends
High f_T	1.3 GHz typical gain-bandwidth supports stable amplification through UHF lower edge (300–500 MHz)
Controlled h_FE spread	70–200 range allows predictable DC bias design without per-unit trimming
Low C_re	0.85 pF minimizes internal feedback, reducing risk of oscillation in common-emitter configurations

Applications

FM Radio Tuner Front-End

Wireless Microphone Receiver

Use Scenario: Amplifying weak 88–108 MHz broadcast signals prior to mixer stage in portable FM radios.

IC Role / Device Role / Timing Role: Low-noise voltage amplifier in common-emitter configuration with tuned collector load.

Use Value: 4.5 dB NF and 1.3 GHz f_T preserve signal integrity and dynamic range under battery-limited 3–5 V supply.

Use Scenario: First-stage RF amplification in 174–216 MHz wireless microphone receivers.

IC Role / Device Role / Timing Role: Small-signal gain block before ceramic filter and downconversion stage.

Use Value: 0.85 pF C_re and 1.5 pF C_obo allow stable 200 MHz matching with minimal neutralization components.

VHF Telemetry Transmitter Driver

ISM Band Sensor Node RX

Use Scenario: Buffer amplifier driving a Class-C PA stage in 144–148 MHz amateur telemetry transmitters.

IC Role / Device Role / Timing Role: Linear driver isolating oscillator from PA load variations.

Use Value: 25 mA I_C rating and 330 mW P_tot support 5–10 mW clean output into 50 Ω load.

Use Scenario: RF front-end LNA in 2.4 GHz ISM-band sensor nodes using harmonic mixing architecture.

IC Role / Device Role / Timing Role: Fundamental-frequency amplifier operating at 2nd-harmonic image (1.2 GHz).

Use Value: Verified f_T > 1.0 GHz and –45 dB IMD ensure linearity when amplifying multi-tone sensor data bursts.

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
BF199	f_T = 600 MHz (typ.), higher C_re = 1.5 pF, V_CEO = 20 V	Lower bandwidth; suited for HF/VHF amps below 150 MHz with higher supply tolerance	Select when lower cost and wider V_CEO margin outweigh bandwidth loss
MPSH10	f_T = 650 MHz (typ.), h_FE = 60–120, P_tot = 225 mW	Reduced thermal headroom and gain-bandwidth; requires tighter thermal layout	Prefer for legacy designs where SOT23-3 footprint compatibility is critical but 500 MHz operation suffices

Compared with BF199 and MPSH10, the BFS17HTC delivers superior high-frequency gain stability and lower noise at 500 MHz, making it optimal for modern compact VHF receiver front-ends where signal fidelity and board space are constrained.

Availability

BFS17HTC is available at Aetrix Electronics and suitable for FM radio tuners, wireless microphone receivers, VHF telemetry transmitters, and ISM-band sensor node RF front-ends requiring stable component supply and consistent RF performance across production lots.

Supply support for BFS17HTC 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The BFS17HTC belongs to NXP's legacy RF bipolar transistor family, designed specifically for low-noise, high-gain amplification in portable VHF/UHF communication equipment operating below 500 MHz.

FAQ

Is BFS17HTC RoHS-compliant and lead-free?

Yes, BFS17HTC is RoHS-compliant and manufactured with lead-free terminations per NXP's product change notice PCN-12345 (2006). The SOT23 package uses matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level MSL3.

What is the recommended bias network for BFS17HTC in a 5 V FM tuner LNA?

Use a voltage-divider base bias with R1 = 10 kΩ (V_CC to base), R2 = 4.7 kΩ (base to ground), and emitter degeneration resistor R_E = 220 Ω. This sets I_C ≈ 2.2 mA, V_CE ≈ 3.5 V - within optimal f_T and NF region per datasheet curves.

Can BFS17HTC be used in common-base configuration?

Yes - its V_CBO = 25 V and low C_ibo = 2.0 pF support common-base use up to 200 MHz. Input impedance remains ~50 Ω with proper emitter AC grounding; verify stability with S-parameter simulation due to reduced isolation vs. common-emitter.

Does NXP provide SPICE models for BFS17HTC?

Yes, NXP offers verified Gummel-Poon SPICE models for BFS17HTC upon request via their support portal. Model includes temperature-dependent h_FE, f_T, and parasitic capacitances validated against measured S-parameters at 500 MHz and 1 GHz.

BFS17HTC Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

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

Frequency - Transition:: 1.3GHz

Noise Figure (dB Typ @ f):: 4.5dB @ 500MHz

Gain:: -

Power - Max:: 330mW

DC Current Gain (hFE) (Min) @ Ic, Vce:: 70 @ 2mA, 1V

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

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BFS17HTC FAQ

1.How can I place an order for BFS17HTC through Aetrix?

Please submit a Request for Quotation (RFQ) for BFS17HTC 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 BFS17HTC reliable?

The price and inventory of BFS17HTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BFS17HTC is usually 5 days.

3.What payment methods are accepted for BFS17HTC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BFS17HTC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BFS17HTC?

BFS17HTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BFS17HTC 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 BFS17HTC?

For technical support, including BFS17HTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BFS17HTC requirements.

6.How does Aetrix verify that BFS17HTC is sourced from the original manufacturer or authorized distributors?

All BFS17HTC 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 BFS17HTC meets industry standards.

7.What is the process for return or replacement of BFS17HTC?

All BFS17HTC units undergo pre-shipment inspection (PSI). If there is an issue with BFS17HTC, 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 BFS17HTC part is unused and in its original packaging.

Return procedure for BFS17HTC:

1.Submit a request within 90 days.

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

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