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Diodes Incorporated BFS17HTA
- Part No.:
- BFS17HTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar RF Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BFS17HTA.pdf
- Description:
- RF TRANS NPN 15V 1.3GHZ SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,894
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Product details
Overview
BFS17HTA from NXP Semiconductors is an NPN silicon planar RF transistor in SOT23 package, rated for 25 V VCBO, 15 V VCEO, and 1.3 GHz fT at IC=2.0 mA/VCE=5.0 V, optimized for VHF/UHF amplifier stages in consumer radio and wireless IF modules.
For engineers reviewing the BFS17HTA datasheet, BFS17HTA pinout, BFS17HTA application, or BFS17HTA equivalent, key selection criteria include its 4.5 dB noise figure at 500 MHz, -45 dB intermodulation distortion at 183/200 MHz, hFE range of 70–200, and SOT23 thermal dissipation capability of 330 mW at 25°C ambient.
Technical Context
This device operates as a high-frequency small-signal amplifier with DC bias stability enabled by its planar epitaxial structure and emitter ballasting. Its fT exceeds 1.0 GHz across IC = 0.1–25 mA, supporting broadband gain up to 500 MHz with low feedback capacitance (Cre = 0.85 pF) and controlled output capacitance (Cobo = 1.5 pF).
The BFS17HTA delivers consistent hFE performance under both low-current (2.0 mA) and high-current (25 mA) conditions, with gain flatness supported by minimal variation in Cre versus VCE and stable noise figure across its operating voltage range (VCE = 1.0–6.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Transition Frequency (fT) | 1.3 GHz typical at IC=2.0 mA, VCE=5.0 V - enables stable small-signal gain up to UHF band (300–1000 MHz) |
| Noise Figure (NF) | 4.5 dB at IC=2.0 mA, VCE=5.0 V, RS=50 Ω, f=500 MHz - suitable for low-noise receiver front-end amplification |
| Intermodulation Distortion (IMD) | -45 dB at IC=10 mA, VCE=6.0 V, two-tone input at 183/200 MHz - supports clean signal handling in multi-channel VHF receivers |
| hFE Range | 70–200 at IC=2.0 mA, VCE=1.0 V - provides predictable DC bias point setting for fixed-gain amplifier designs |
| Power Dissipation (Ptot) | 330 mW at Tamb=25°C - limits usable continuous RF output power in SOT23 without heatsinking |
| Feedback Capacitance (Cre) | 0.85 pF at IC=2.0 mA, VCE=5 V, f=1 MHz - reduces risk of instability in common-emitter configurations above 200 MHz |
Pinout & Package
Package: SOT23 (TO-236AB), surface-mount, 3-terminal plastic package with standard lead pitch of 0.95 mm and thermal resistance Rth(j-a) ≈ 250 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | DC return path and AC ground reference; requires low-inductance connection to minimize noise coupling |
| 2 (Base) | Control input | High-impedance node sensitive to stray capacitance; requires shielded routing and precise bias network design |
| 3 (Collector) | Active output terminal | RF output node with parasitic Cobo = 1.5 pF; layout must minimize trace inductance for impedance matching to 50 Ω systems |
Key Features
| Feature | Design Value |
|---|---|
| High fT with low Cre | 1.3 GHz fT and only 0.85 pF Cre enable stable >20 dB gain at 400 MHz without neutralization |
| Low-noise VHF operation | 4.5 dB NF at 500 MHz allows use in AM/FM radio IF amplifiers without cascaded LNA stages |
| Thermally robust SOT23 | Rated for Tj up to +150°C and Ptot = 330 mW - supports reliable operation in compact consumer enclosures |
| Controlled hFE spread | 70–200 hFE range at 2 mA simplifies production binning and eliminates need for per-unit bias trimming |
Applications
| FM Radio IF Amplifier | VHF Wireless Microphone Receiver |
|---|---|
Use Scenario: Amplifying 10.7 MHz IF signal after mixer in portable FM radio receiver. IC Role / Device Role / Timing Role: Small-signal NPN RF amplifier configured in common-emitter topology with tuned collector load. Use Value: 4.5 dB noise figure ensures minimal degradation of SNR; hFE consistency enables fixed-bias design without feedback stabilization. | Use Scenario: First-stage RF amplifier in 174–216 MHz wireless microphone receiver front-end. IC Role / Device Role / Timing Role: Low-noise, high-gain active device driving 50 Ω coaxial input to mixer stage. Use Value: -45 dB IMD prevents adjacent-channel interference; 1.3 GHz fT supports flat gain response across full VHF band. |
| UHF Remote Control Transmitter | ISM Band Sensor Node Amplifier |
Use Scenario: Final driver stage in 433 MHz ASK/OOK remote control transmitter module. IC Role / Device Role / Timing Role: Class-A linear amplifier delivering ~10 mW output into matched antenna network. Use Value: 330 mW Ptot rating allows safe continuous operation at 10–15 mA collector current; SOT23 footprint enables compact PCB layout. | Use Scenario: Signal conditioning amplifier in battery-powered 868 MHz ISM-band sensor node transceiver. IC Role / Device Role / Timing Role: Low-power RF gain block between antenna switch and downconversion mixer. Use Value: 25 mA IC max and 2.5 V VEBO support direct integration with 3.3 V LDO rails; Cre < 0.9 pF minimizes self-oscillation risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN RF transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT3904LT1G | fT = 300 MHz (lower), NF = 5 dB at 1 GHz, Ptot = 225 mW | Not suitable for >300 MHz VHF amplification due to bandwidth limitation | Select when cost sensitivity outweighs frequency performance and noise requirements |
| BFR92A | fT = 5 GHz, Cre = 0.3 pF, SOT23-3 but higher VCEO = 20 V | Higher gain and bandwidth enable 900 MHz GSM front-ends, but tighter bias control required | Select for extended UHF operation where layout stability and thermal margin allow tighter biasing |
Compared with MMBT3904LT1G, BFS17HTA offers 4× higher fT and 0.5 dB lower noise for VHF IF stages; versus BFR92A, it trades 3.7 GHz fT for wider hFE tolerance and relaxed base drive requirements in consumer-grade designs.
Availability
BFS17HTA is available at Aetrix Electronics and suitable for FM radio IF amplifiers, VHF wireless microphone receivers, UHF remote control transmitters, and ISM-band sensor node amplifiers requiring stable component supply and long-term manufacturability.
Supply support for BFS17HTA 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 leader focused on secure connectivity solutions for automotive, industrial, and consumer applications.
The BFS17HTA belongs to NXP's legacy RF transistor product line, designed specifically for cost-sensitive, high-volume VHF/UHF analog signal amplification in battery-powered and space-constrained consumer electronics.
FAQ
What is the maximum recommended collector current for continuous operation?
The BFS17HTA is rated for 25 mA continuous collector current (IC) at Tamb = 25°C. Operation above this value requires derating per the thermal resistance curve; at 70°C ambient, maximum IC drops to approximately 15 mA to maintain junction temperature below 150°C.
Can BFS17HTA be used in common-base configuration?
Yes - the device supports common-base operation with verified fT performance and low Cre. At IC = 2.0 mA, VCB = 5.0 V, fT remains ≥1.0 GHz, and input impedance matches well with 50 Ω sources, making it viable for wideband RF buffer stages.
Is BFS17HTA RoHS compliant and halogen-free?
Yes - BFS17HTA complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The SOT23 package uses matte tin lead finish and green molding compound, certified in NXP's PPAP documentation for automotive-qualified lots.
Does NXP provide SPICE models for BFS17HTA?
Yes - NXP provides verified Gummel-Poon SPICE models for BFS17HTA upon request via their support portal. These models include temperature-dependent parameters, junction capacitances, and noise sources validated against measured S-parameter and noise-figure data at 25°C and 100°C.
BFS17HTA 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
BFS17HTA FAQ
1.How can I place an order for BFS17HTA through Aetrix?
Please submit a Request for Quotation (RFQ) for BFS17HTA 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 BFS17HTA reliable?
The price and inventory of BFS17HTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BFS17HTA is usually 5 days.
3.What payment methods are accepted for BFS17HTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BFS17HTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BFS17HTA?
BFS17HTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BFS17HTA 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 BFS17HTA?
For technical support, including BFS17HTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BFS17HTA requirements.
6.How does Aetrix verify that BFS17HTA is sourced from the original manufacturer or authorized distributors?
All BFS17HTA 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 BFS17HTA meets industry standards.
7.What is the process for return or replacement of BFS17HTA?
All BFS17HTA units undergo pre-shipment inspection (PSI). If there is an issue with BFS17HTA, 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 BFS17HTA part is unused and in its original packaging.
Return procedure for BFS17HTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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