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

NXP Semiconductors BFR92AW,135

Name: BFR92AW,135
Brand: NXP Semiconductors
SKU: BFR92AW,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BFR92AW,135

Manufacturer:: NXP Semiconductors

Category:: Bipolar RF Transistors

Package:: SC-70, SOT-323

Datasheet:: BFR92AW,135.pdf

Description:: RF TRANS NPN 15V 5GHZ SOT323-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BFR92AW,135 from NXP Semiconductors is an NPN silicon RF transistor in SOT323 (S-mini) package, rated for 15 V V_CEO, 25 mA I_C, 300 mW P_tot, 5 GHz f_T, and 2 dB noise figure at 1 GHz - designed for high-gain, low-noise RF amplification in portable FM/AM receivers and UHF front-ends.

For engineers reviewing the BFR92AW,135 datasheet, BFR92AW,135 pinout, BFR92AW,135 application, or BFR92AW,135 equivalent, key selection criteria include its 14 dB maximum unilateral gain at 1 GHz, gold-metallized reliability, SOT323 thermal resistance of 190 K/W, and verified performance up to 2 GHz with <0.35 pF feedback capacitance.

Technical Context

The BFR92AW,135 operates as a common-emitter NPN RF amplifier with DC biasing defined by V_CE = 10 V and I_C = 15 mA for gain and noise optimization. Its s-parameters are characterized at 50 Ω system impedance, with s₂₁ gain peaking at ~15 dB below 1 GHz and s₁₁/s₂₂ showing moderate input/output match across 40 MHz–3 GHz.

Thermal design relies on junction-to-solder-point thermal resistance (R_{th j-s} = 190 K/W), with power derating required above T_s = 93 °C at the collector pin. The device uses the same die as the SOT23-packaged BFR92A but adapted for SOT323's smaller footprint and thermal profile.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	15 V - Maximum safe collector-emitter voltage under DC open-base conditions; defines headroom for RF signal swing in amplifier stages.
f_T	5 GHz typical - Transition frequency indicating usable gain bandwidth; supports stable amplification up to ~2 GHz with measured G_UM ≥8 dB.
F (Noise Figure)	2 dB typical at 1 GHz - Low-noise performance critical for receiver front-end sensitivity; optimized at I_C = 5 mA, Γ_s = Γ_opt.
G_UM	14 dB typical at 1 GHz - Maximum unilateral power gain; enables single-stage RF amplification without neutralization in narrowband designs.
C_re	0.35 pF typical - Feedback capacitance limiting stability margin; requires careful layout and potential emitter degeneration for unconditional stability.
R_{th j-s}	190 K/W - Thermal resistance from junction to collector solder point; dictates PCB copper area and thermal via requirements for 300 mW operation.
Package	SOT323 (S-mini) - 1.35 mm × 1.15 mm × 0.95 mm surface-mount package with 0.65 mm pin pitch; compatible with standard pick-and-place and reflow profiles.

Pinout & Package

SOT323 (S-mini) plastic package with gull-wing leads, 1.35 mm × 1.15 mm body, 0.95 mm max height, and gold-metallized interconnects for corrosion resistance and bond reliability.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	DC bias and RF input node; requires impedance-matched network (e.g., 50 Ω series/base shunt) for optimal noise and gain.
2	Emiter	AC ground reference and current return path; must be low-inductance connection to minimize degeneration and phase shift.
3	Collector	RF output and power delivery node; primary thermal path - solder pad size and vias directly impact R_{th j-s} and power handling.

Key Features

Feature	Design Value
Gold metallization	Ensures long-term interconnect integrity and resistance to wire-bond degradation under thermal cycling and humidity stress.
High f_T / low C_re ratio	Enables broadband amplification with usable gain beyond 1 GHz while maintaining stability margins without complex compensation.
Low noise figure at 1 GHz	Supports high-sensitivity receiver designs where 2 dB NF directly improves minimum detectable signal by ~1.6 dB.
SOT323 footprint compatibility	Matches industry-standard 0805-equivalent board space, enabling drop-in replacement in space-constrained portable RF layouts.

Applications

FM/AM Radio Front-End	UHF Wireless Microphone Receiver
Use Scenario: Amplifying weak antenna signals in portable battery-powered radios operating at 88–108 MHz (FM) and 530–1710 kHz (AM). IC Role / Device Role / Timing Role: First-stage low-noise RF amplifier with common-emitter configuration and tuned LC input matching. Use Value: 2 dB noise figure and 14 dB G_UM at 100 MHz improve signal-to-noise ratio before mixer stage, extending usable reception range.	Use Scenario: RF preamplifier in 470–960 MHz wireless microphone receivers used in live sound and broadcast. IC Role / Device Role / Timing Role: High-linearity, low-distortion gain block between antenna and downconversion mixer. Use Value: 5 GHz f_T and 8 dB G_UM at 2 GHz ensure stable gain and minimal intermodulation distortion in crowded UHF bands.
ISM Band Sensor Transceiver	Portable TV Tuner IF Amplifier
Use Scenario: Transmit/receive switching amplifier in 2.4 GHz ISM-band sensor nodes requiring low-power, reliable RF gain. IC Role / Device Role / Timing Role: Single-transistor RF amplifier in half-duplex transceiver front-end with external T/R switch control. Use Value: Gold metallization and 150 °C T_j rating support continuous operation in unventilated industrial enclosures.	Use Scenario: Intermediate-frequency (IF) amplifier in analog/digital TV tuners processing 36–44 MHz signals after channel selection. IC Role / Device Role / Timing Role: Fixed-gain broadband amplifier with emitter degeneration for flat group delay and amplitude response. Use Value: 0.35 pF C_re and 190 K/W R_{th j-s} allow stable 300 mW operation with minimal thermal drift over temperature.

FM/AM Radio Front-End

UHF Wireless Microphone Receiver

Use Scenario: Amplifying weak antenna signals in portable battery-powered radios operating at 88–108 MHz (FM) and 530–1710 kHz (AM).

IC Role / Device Role / Timing Role: First-stage low-noise RF amplifier with common-emitter configuration and tuned LC input matching.

Use Value: 2 dB noise figure and 14 dB G_UM at 100 MHz improve signal-to-noise ratio before mixer stage, extending usable reception range.

Use Scenario: RF preamplifier in 470–960 MHz wireless microphone receivers used in live sound and broadcast.

IC Role / Device Role / Timing Role: High-linearity, low-distortion gain block between antenna and downconversion mixer.

Use Value: 5 GHz f_T and 8 dB G_UM at 2 GHz ensure stable gain and minimal intermodulation distortion in crowded UHF bands.

ISM Band Sensor Transceiver

Portable TV Tuner IF Amplifier

Use Scenario: Transmit/receive switching amplifier in 2.4 GHz ISM-band sensor nodes requiring low-power, reliable RF gain.

IC Role / Device Role / Timing Role: Single-transistor RF amplifier in half-duplex transceiver front-end with external T/R switch control.

Use Value: Gold metallization and 150 °C T_j rating support continuous operation in unventilated industrial enclosures.

Use Scenario: Intermediate-frequency (IF) amplifier in analog/digital TV tuners processing 36–44 MHz signals after channel selection.

IC Role / Device Role / Timing Role: Fixed-gain broadband amplifier with emitter degeneration for flat group delay and amplitude response.

Use Value: 0.35 pF C_re and 190 K/W R_{th j-s} allow stable 300 mW operation with minimal thermal drift over temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BFR93AW,135	Higher f_T (6 GHz typ), higher V_CEO (20 V), identical SOT323 package and pinout.	Better suited for 2.4 GHz ISM-band amplifiers requiring extended gain bandwidth and higher supply headroom.	Select BFR93AW,135 when >5 GHz f_T or >15 V V_CEO is required; otherwise BFR92AW,135 offers lower cost and proven 1 GHz performance.
MRF901T1	TO-92 package, higher P_tot (500 mW), lower f_T (2.5 GHz), different pinout (E-B-C).	Used in through-hole consumer audio RF stages where thermal mass and manual assembly are acceptable.	Choose MRF901T1 only for legacy TO-92 designs; not a drop-in replacement due to package, pinout, and thermal interface mismatch.

Compared with BFR92AW,135, the BFR93AW,135 extends usable bandwidth and voltage margin while retaining footprint compatibility, whereas the MRF901T1 trades miniaturization and RF performance for mechanical robustness and higher power in non-portable systems.

Availability

BFR92AW,135 is available at Aetrix Electronics and suitable for FM radio front-ends, UHF wireless microphones, and ISM-band sensor transceivers requiring stable component supply and consistent RF performance across production batches.

Supply support for BFR92AW,135 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 BFR92AW,135 belongs to NXP's legacy RF transistor product line targeting high-frequency analog signal conditioning in portable and battery-powered RF systems.

FAQ

What is the maximum operating frequency of the BFR92AW,135?

The BFR92AW,135 has a typical transition frequency (f_T) of 5 GHz, with verified maximum unilateral gain (G_UM) of 14 dB at 1 GHz and 8 dB at 2 GHz. It is characterized for stable RF amplification up to 2 GHz; operation beyond this requires stability analysis using measured s-parameters from the datasheet.

Does the BFR92AW,135 require external biasing components?

Yes, the BFR92AW,135 is a discrete NPN transistor requiring external DC biasing: a base resistor or voltage divider sets I_C, while collector and emitter paths need RF chokes and bypass capacitors. Typical bias points are I_C = 5–15 mA and V_CE = 5–10 V, per the datasheet's noise and gain optimization curves.

Is the BFR92AW,135 RoHS compliant?

Yes, the BFR92AW,135 is RoHS compliant and lead-free, as confirmed by NXP's product change notices and material declarations dated post-2006. The SOT323 package uses matte tin (Sn) lead finish and halogen-free molding compound.

Can the BFR92AW,135 replace the BFR92A in existing designs?

The BFR92AW,135 shares the same die as the SOT23-packaged BFR92A but is housed in SOT323. While electrical characteristics are identical, the smaller SOT323 footprint and different thermal path (R_{th j-s} = 190 K/W vs. ~220 K/W for SOT23) require PCB layout review - especially collector pad area and thermal vias - before substitution.

What is the recommended storage condition for BFR92AW,135?

The BFR92AW,135 should be stored at temperatures between −65 °C and +150 °C in dry, inert environments. Per NXP's handling guidelines, moisture sensitivity level (MSL) is not assigned - the SOT323 package is not moisture-sensitive and does not require baking prior to reflow.

BFR92AW,135 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

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

Frequency - Transition:: 5GHz

Noise Figure (dB Typ @ f):: 2dB ~ 3dB @ 1GHz ~ 2GHz

Gain:: -

Power - Max:: 300mW

DC Current Gain (hFE) (Min) @ Ic, Vce:: 65 @ 15mA, 10V

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

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70

BFR92AW,135 FAQ

1.How can I place an order for BFR92AW,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for BFR92AW,135 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 BFR92AW,135 reliable?

The price and inventory of BFR92AW,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BFR92AW,135 is usually 5 days.

3.What payment methods are accepted for BFR92AW,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BFR92AW,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BFR92AW,135?

BFR92AW,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BFR92AW,135 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 BFR92AW,135?

For technical support, including BFR92AW,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BFR92AW,135 requirements.

6.How does Aetrix verify that BFR92AW,135 is sourced from the original manufacturer or authorized distributors?

All BFR92AW,135 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 BFR92AW,135 meets industry standards.

7.What is the process for return or replacement of BFR92AW,135?

All BFR92AW,135 units undergo pre-shipment inspection (PSI). If there is an issue with BFR92AW,135, 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 BFR92AW,135 part is unused and in its original packaging.

Return procedure for BFR92AW,135:

1.Submit a request within 90 days.

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

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