Infineon Technologies BF799WE6327BTSA1

Overview

BF799WE6327BTSA1 from Infineon Technologies is an NPN silicon RF transistor optimized for linear broadband amplifier operation up to 500 MHz, with f_T = 800–1100 MHz, V_CEO = 20 V, I_C = 35 mA, and low noise figure of 3 dB at 100 MHz - used as SAW filter driver in analog/digital TV tuners.

For engineers reviewing the BF799WE6327BTSA1 datasheet, BF799WE6327BTSA1 pinout, BF799WE6327BTSA1 application, or BF799WE6327BTSA1 equivalent, key selection criteria include transition frequency, noise performance, V_CEO/V_CBO ratings, SOT323 thermal resistance (R_thJS ≤ 155 K/W), and DC current gain (h_FE = 35–250).

Technical Context

This RF transistor employs a planar epitaxial silicon structure with optimized emitter-base geometry to achieve high f_T and low C_ob (0.96 pF typ.) at V_CB = 10 V. Its low V_CEsat (0.1–0.3 V) and V_BEsat (≤0.95 V) support efficient Class-A/AB small-signal amplification.

The device operates with fixed-bias or emitter-degenerated configurations in 50 Ω systems, delivering stable g_22e = 60 µS output conductance at 35 MHz and maintaining <3 dB noise figure across its specified 100 MHz test condition.

Key Specifications

Pinout & Package

SOT323 (SC-70) surface-mount plastic package with 3-pin configuration: compact footprint (2.1 × 1.25 mm), 0.65 mm pin pitch, and exposed die pad for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BFP181W and MRF901, BF799WE6327BTSA1 offers optimal balance of 500 MHz bandwidth, 20 V ruggedness, SOT323 compactness, and 3 dB noise figure - making it uniquely suited for cost-sensitive, space-constrained TV tuner IF amplifiers.

Availability

BF799WE6327BTSA1 is available at Aetrix Electronics and suitable for analog TV tuners, digital terrestrial TV receivers, CATV downconverters, and FM radio front-ends requiring stable component supply and RoHS-compliant packaging.

Supply support for BF799WE6327BTSA1 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 AG is a German semiconductor manufacturer specializing in power management, RF, automotive, and security ICs, headquartered in Munich.

The BF799W belongs to Infineon's RF bipolar transistor product line, engineered specifically for high-linearity, low-noise IF amplification in broadcast receiver systems.

FAQ

What is the maximum operating frequency for linear amplification with BF799WE6327BTSA1?

The device is characterized for linear broadband amplifier operation up to 500 MHz, with transition frequency f_T ranging from 800 MHz to 1100 MHz. Gain remains usable and stable within this band when biased per datasheet conditions (I_C = 5–20 mA, V_CE = 8–10 V), and application notes confirm stable S-parameters through 500 MHz in 50 Ω systems.

Can BF799WE6327BTSA1 replace BF799W in existing designs?

Yes - BF799WE6327BTSA1 is the tape-and-reel packaged version of the BF799W, sharing identical electrical specifications, pinout, thermal behavior, and SOT323 footprint. The "E6327" suffix denotes reel packaging (3,000 pcs/reel, ø180 mm), and "B" indicates Infineon's standard quality grade; no circuit redesign is needed.

What thermal derating applies above 107 °C board temperature?

Per datasheet Fig. 3, total power dissipation must be linearly reduced above T_S = 107 °C: at 125 °C board temperature, P_tot drops to ~200 mW; at 150 °C, it falls to ~100 mW. Derating follows the curve P_tot = f(T_S), not a fixed slope, and requires validation against actual board layout thermal resistance.

Is BF799WE6327BTSA1 suitable for Class-C RF power amplification?

No - this device is optimized for linear (Class-A/AB) small-signal amplification, not switching or saturated operation. Its low V_CEsat and moderate P_tot (280 mW) reflect design intent for gain and noise performance, not efficiency or harmonic content control. Class-C use risks thermal runaway and parametric shift outside datasheet limits.