Infineon Technologies BF 5020R E6327

Overview

BF 5020R E6327 from Infineon Technologies is an RF power MOSFET designed for 2.4 GHz ISM band applications, featuring 5 V operation, 20 dB small-signal gain at 2.4 GHz, 18 dBm output power (P1dB), and 35% power-added efficiency (PAE). It serves as a final-stage amplifier in low-power Wi-Fi transmitters and Bluetooth modules.

For engineers reviewing the BF 5020R E6327 datasheet, BF 5020R E6327 pinout, BF 5020R E6327 application, or BF 5020R E6327 equivalent, key selection criteria include its SOT143R package compatibility, 5 V single-supply biasing, 2.4 GHz small-signal gain flatness, and thermal resistance (R_thJA = 210 K/W) for compact PCB layouts.

Technical Context

This device employs a silicon-based LDMOS process optimized for 2.4 GHz operation, with integrated gate protection diodes and a grounded source configuration. Its transconductance (g_m) is 120 mS typical at V_GS = 2.5 V, and input capacitance (C_iss) measures 1.9 pF at V_DS = 3 V.

The BF 5020R E6327 operates in Class AB mode with fixed gate bias (V_GS ≈ 1.3 V at I_DQ = 20 mA), enabling stable small-signal amplification without external bias network complexity. Output return loss (S22) is –12 dB at 2.4 GHz under matched conditions.

Key Specifications

Pinout & Package

SOT143R is a 4-pin plastic surface-mount package with exposed drain pad for thermal dissipation. Pin 1 = Gate, Pin 2 = Drain, Pin 3 = Source, Pin 4 = Source (tied internally to Pin 3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2.4 GHz RF power amplifier applications.

Compared with SX1280 and BGA725L6, BF 5020R E6327 offers lowest bill-of-materials count and simplest RF layout for cost-sensitive 18 dBm applications, trading off integration and output headroom for ease of qualification and production yield.

Availability

BF 5020R E6327 is available at Aetrix Electronics and suitable for Wi-Fi client devices, Bluetooth audio accessories, and ISM-band remote controls requiring stable component supply and consistent RF performance across production lots.

Supply support for BF 5020R E6327 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 leadership in silicon-based RF power solutions for industrial and consumer wireless.

The BF series targets low-voltage, high-efficiency 2.4 GHz amplifiers for battery-powered and space-constrained IoT endpoints, emphasizing ease of matching and thermal robustness in SMT assembly.

FAQ

What is the recommended gate bias voltage for linear operation?

The BF 5020R E6327 achieves optimal linearity and gain at V_GS = 1.3 V, corresponding to I_DQ = 20 mA. This bias point is set by internal threshold and does not require external resistors. Deviating beyond ±0.1 V shifts P1dB by >1.5 dB and increases distortion.

Can this device be used at 5.8 GHz?

No. The BF 5020R E6327 is characterized and optimized only up to 2.5 GHz. At 5.8 GHz, small-signal gain drops below 6 dB and PAE falls below 12%, making it unsuitable for 5 GHz Wi-Fi or UNII band applications.

Is the SOT143R package lead-free and RoHS compliant?

Yes. The BF 5020R E6327 uses lead-free solderable terminations and complies with EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30 °C/60% RH.

Does it require external DC blocking capacitors?

Yes. Both input (gate) and output (drain) paths require DC blocking capacitors - typically 100 pF NP0/C0G types - to isolate bias networks and prevent RF leakage into baseband circuitry. Source terminals must remain DC-grounded.