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Infineon Technologies BFP405H6740XTSA1
- Part No.:
- BFP405H6740XTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Bipolar RF Transistors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
BFP405H6740XTSA1.pdf
- Description:
- RF TRANS NPN 5V 25GHZ SOT343
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BFP405H6740XTSA1 from Infineon Technologies is a low-noise silicon bipolar RF transistor in SOT343 package, designed for oscillator and amplifier stages up to 12 GHz. It delivers NFmin = 1.25 dB at 1.8 GHz, Gms = 23 dB at 1.8 GHz, and fT = 25 GHz (typ), with VCEO = 4.5 V and IC = 25 mA max - used in GPS L1-band front-end LNAs and cellular RF synthesizers.
For engineers reviewing the BFP405H6740XTSA1 datasheet, BFP405H6740XTSA1 pinout, BFP405H6740XTSA1 application, or BFP405H6740XTSA1 equivalent, key selection criteria include noise figure vs. bias point, S-parameter stability at 1.8–2.4 GHz, thermal resistance (RthJS = 530 K/W), and RoHS/halogen-free compliance for automotive-grade RF modules.
Technical Context
This NPN bipolar transistor operates in common-emitter configuration with optimized emitter-base and collector-base junction geometries for high fT and low Ccb (0.05 pF typ). Its noise performance is characterized at ZS = ZSopt, requiring external matching networks for minimum noise figure across 0.9–6 GHz.
The device uses a monolithic silicon die in a leaded SOT343 package with visible leads, qualified per AEC-Q101 for automotive ambient ranges (−65 °C to +150 °C). Thermal design must account for RthJS = 530 K/W measured at the emitter soldering point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| NFmin | 1.25 dB at 1.8 GHz - sets lower bound for system noise floor in GPS/GSM receive chains |
| Gms | 23 dB at 1.8 GHz - maximum stable power gain enabling single-stage oscillator design |
| fT | 25 GHz typ at IC = 10 mA, VCE = 3 V - supports fundamental oscillation up to 12 GHz |
| Ccb | 0.05 pF typ at VCB = 2 V - minimizes Miller effect in broadband amplifiers |
| VCEO | 4.5 V at TA = 25 °C - defines maximum supply headroom for 3.3 V RF bias rails |
| RthJS | 530 K/W - requires thermal relief on emitter pad for >15 mW continuous dissipation |
| IP3 | 15 dBm at 1.8 GHz - determines linearity limit for two-tone LTE uplink signals |
Pinout & Package
SOT343 package: 4-pin surface-mount plastic case with visible leads, lead-free and halogen-free, footprint compatible with JEDEC MO-187 variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (B) | Base | DC bias and RF input node; requires DC blocking and impedance matching network |
| 2 (E) | Emitter | AC ground reference and thermal path; soldered directly to PCB copper for heat dissipation |
| 3 (C) | Collector | RF output or oscillator tank connection; sensitive to parasitic inductance due to bond wire |
| 4 (E) | Emitter (redundant) | Second emitter terminal for improved grounding and current sharing in high-frequency layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood RF modules operating from −40 °C to +125 °C ambient |
| ZSopt frequency dependence | Source impedance varies from (10 + j100) Ω at 0.9 GHz to (50 + j25) Ω at 1.8 GHz - enables broadband noise matching |
| SPICE GP model availability | Includes full package parasitics and verified up to 6 GHz - supports accurate AC/RF simulation in ADS/MWO |
| ESD sensitivity | HBM Class 2 (≥2 kV) - mandates grounded wrist strap and ionized air handling during assembly |
Applications
| GPS L1-Band LNA | Cellular RF Synthesizer |
|---|---|
Use Scenario: Low-noise amplification of 1.575 GHz GPS signals in automotive telematics units. IC Role / Device Role / Timing Role: First-stage LNA in cascaded receiver chain, biased at IC = 2 mA for optimal NFmin. Use Value: Achieves system noise figure < 2.0 dB with ZS = ZSopt matching, enabling −160 dBm sensitivity. | Use Scenario: Fundamental-mode VCO core in 1.8 GHz GSM/UMTS frequency synthesizers. IC Role / Device Role / Timing Role: Active device in Colpitts oscillator topology with integrated varactor tuning. Use Value: Delivers phase noise of −115 dBc/Hz at 100 kHz offset via high Gms and low Ccb. |
| ISM Band Transmitter Driver | Wi-Fi 2.4 GHz PA Pre-driver |
Use Scenario: Output driver for 2.45 GHz Bluetooth LE transmitters in medical wearables. IC Role / Device Role / Timing Role: Class-A linear amplifier stage delivering 0 dBm output before final PA. Use Value: IP3 = 15 dBm ensures ACLR > 45 dB for BLE packet modulation without distortion. | Use Scenario: Pre-driver in dual-band Wi-Fi 2.4 GHz front-end modules for routers. IC Role / Device Role / Timing Role: Gain block between baseband IC and 2.4 GHz power amplifier. Use Value: |S21|² = 18.5 dB at 50 Ω simplifies matching network design and reduces board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise RF transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BFP420H6327XTSA1 | fT = 30 GHz typ, NFmin = 1.35 dB at 1.8 GHz, Ccb = 0.04 pF - higher speed but slightly noisier | Better suited for 5 GHz Wi-Fi 6E pre-drivers where bandwidth > 4 GHz is critical | Select when f > 3 GHz operation dominates over absolute noise floor minimization |
| MMA040507-12 | fT = 22 GHz typ, NFmin = 1.15 dB at 1.8 GHz, RthJS = 480 K/W - lower noise but reduced thermal margin | Preferred in compact GPS modules where 0.1 dB NF improvement justifies tighter thermal design | Choose when board space limits heatsinking and NF < 1.2 dB is mandatory |
Compared with BFP405H6740XTSA1, BFP420 offers higher bandwidth at modest noise penalty, while MMA040507-12 achieves lower NF but demands stricter thermal management - selection hinges on whether system priority is frequency agility, noise floor, or thermal robustness.
Availability
BFP405H6740XTSA1 is available at Aetrix Electronics and suitable for GPS receivers, cellular RF synthesizers, ISM-band transmitters, and Wi-Fi 2.4 GHz front-end modules requiring stable component supply across automotive and industrial production cycles.
Supply support for BFP405H6740XTSA1 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, RF, and automotive ICs, with global manufacturing and qualification infrastructure.
The BFP405 belongs to Infineon's high-frequency bipolar transistor product line, engineered specifically for low-noise, high-gain RF signal generation and amplification in sub-6 GHz wireless infrastructure and automotive connectivity systems.
FAQ
What is the recommended bias condition for minimum noise figure?
At 1.8 GHz, NFmin = 1.25 dB is achieved with IC = 2 mA and VCE = 2 V using source impedance ZS = ZSopt ≈ (50 + j25) Ω. This requires an external matching network - not a 50 Ω direct connection. The SPICE model includes verified noise parameters for simulation.
Is BFP405H6740XTSA1 suitable for 5G sub-6 GHz applications?
No - while fT reaches 25 GHz, its Gms drops below 10 dB above 3.5 GHz, and IP3 degrades significantly beyond 2.7 GHz. It is validated for 1.8–2.4 GHz bands only; for 3.5 GHz n78 or 4.9 GHz n79, Infineon's BFP640 or BFP740 are specified alternatives.
How does the dual-emitter pin configuration improve RF performance?
Pins 2 and 4 are both emitter terminals, allowing separate RF ground and DC return paths. This reduces ground inductance and improves high-frequency stability - especially critical above 1 GHz where even 0.5 nH of bond-wire inductance causes gain peaking or oscillation.
Does the AEC-Q101 qualification cover full temperature range operation?
Yes - qualification testing includes temperature cycling (−65 °C to +150 °C), high-temperature operating life (1000 hrs at TJ = 150 °C), and ESD (HBM ≥ 2 kV). However, electrical specs like NFmin and Gms are only guaranteed from −40 °C to +125 °C ambient per datasheet conditions.
BFP405H6740XTSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Voltage - Collector Emitter Breakdown (Max):
- 5V
- Frequency - Transition:
- 25GHz
- Noise Figure (dB Typ @ f):
- 1.25dB @ 1.8GHz
- Gain:
- 23dB
- Power - Max:
- 75mW
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 60 @ 5mA, 4V
- Current - Collector (Ic) (Max):
- 25mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT343-3D
BFP405H6740XTSA1 FAQ
1.How can I place an order for BFP405H6740XTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BFP405H6740XTSA1 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 BFP405H6740XTSA1 reliable?
The price and inventory of BFP405H6740XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BFP405H6740XTSA1 is usually 5 days.
3.What payment methods are accepted for BFP405H6740XTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BFP405H6740XTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BFP405H6740XTSA1?
BFP405H6740XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BFP405H6740XTSA1 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 BFP405H6740XTSA1?
For technical support, including BFP405H6740XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BFP405H6740XTSA1 requirements.
6.How does Aetrix verify that BFP405H6740XTSA1 is sourced from the original manufacturer or authorized distributors?
All BFP405H6740XTSA1 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 BFP405H6740XTSA1 meets industry standards.
7.What is the process for return or replacement of BFP405H6740XTSA1?
All BFP405H6740XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BFP405H6740XTSA1, 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 BFP405H6740XTSA1 part is unused and in its original packaging.
Return procedure for BFP405H6740XTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BFP405H6740XTSA1 Tags
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BFR182WH6327XTSA1
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BFR92PE6327HTSA1
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BFR360FH6327XTSA1
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BFR460L3E6327XTMA1
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MMBTH81
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BFP840FESDH6327XTSA1
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BFP650H6327XTSA1
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BFU520AR
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BFS483H6327XTSA1
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