Infineon Technologies BF1009SE6327HTSA1

Overview

BF1009SE6327HTSA1 from Infineon Technologies is a silicon N-channel MOSFET tetrode designed for low-noise, high-gain RF input stages up to 1 GHz. It features integrated biasing (G1/G2), operates at 9 V drain-source voltage, delivers 22 dB typical power gain at 800 MHz, and achieves 1.4 dB typical noise figure under self-biased conditions. It is used in RF front-end amplifiers for automotive radar receivers and UHF wireless infrastructure.

For engineers reviewing the BF1009SE6327HTSA1 datasheet, BF1009SE6327HTSA1 pinout, BF1009SE6327HTSA1 application, or BF1009SE6327HTSA1 equivalent, key selection criteria include its dual-gate structure for AGC control, 30 mS typical forward transconductance, 2.1 pF typical gate1-input capacitance, and SOT143 package compatibility with high-frequency PCB layout requirements.

Technical Context

This tetrode MOSFET uses separate gate terminals (G1 for RF signal input, G2 for DC bias and gain control) to decouple signal path from bias network, enabling stable high-frequency operation without external bias components. Its channel temperature rating of 150 °C and thermal resistance R_th(ch-s) ≤ 370 K/W support reliable performance in compact RF modules.

The device exhibits strong voltage-controlled gain behavior: ΔG_p = 40–50 dB over V_G2S = 6 V to 0 V at 800 MHz, while maintaining sub-2.1 dB noise figure and >26 mS transconductance - characteristics critical for dynamic range management in receiver LNA stages.

Key Specifications

Pinout & Package

SOT143 package: 4-pin surface-mount plastic package with exposed pad for thermal enhancement; footprint optimized for RF layout (low parasitic inductance, controlled impedance routing).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-gate RF MOSFET amplifier applications.

Compared with BFP181H6327XTSA1 and BF1108E6327HTSA1, BF1009SE6327HTSA1 uniquely integrates biasing and enables analog gain control in a single SOT143 device - reducing bill-of-materials and PCB area while preserving noise performance below 1 GHz.

Availability

BF1009SE6327HTSA1 is available at Aetrix Electronics and suitable for automotive radar receivers, UHF wireless infrastructure, and ISM-band sensor transmitters requiring stable component supply across extended production lifecycles.

Supply support for BF1009SE6327HTSA1 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 quality certification to AEC-Q101.

BF1009SE6327HTSA1 belongs to Infineon's RF bipolar and MOSFET transistor product line, engineered specifically for high-gain, low-noise RF amplification in automotive and industrial wireless systems up to 1 GHz.

FAQ

What is the recommended DC bias configuration for BF1009SE6327HTSA1 in self-biased mode?

Apply 9 V between drain and source, connect gate 2 (G2) to +6 V for nominal 13 mA IDSO, and leave gate 1 (G1) AC-coupled to RF input. Do not apply external DC voltage to G1 during active operation, as specified in the datasheet. Source must be grounded directly to minimize inductance.

Can BF1009SE6327HTSA1 be used above 1 GHz?

No - its gain and noise performance degrade significantly above 1 GHz due to intrinsic transit time and parasitic capacitance limits. The datasheet specifies operation "up to 1 GHz", and measured Gp drops below 10 dB and F exceeds 3.5 dB at 1.5 GHz. For >1 GHz, consider BFP181H6327XTSA1 or BGAxx series.

Is BF1009SE6327HTSA1 qualified for automotive applications?

Yes - it is qualified per AEC-Q101 Grade 2, supporting operation from −40 °C to +125 °C ambient, with channel temperature rated to 150 °C. Its RoHS-compliant SOT143 package and tested ESD robustness (HBM Class 2) meet automotive electronics reliability requirements.

How does the dual-gate structure improve noise performance compared to single-gate MOSFETs?

The physical separation of G1 (signal gate) and G2 (bias gate) minimizes feedback capacitance (C_gd) and isolates the high-impedance RF input from bias network noise. This reduces induced gate current noise and stabilizes transconductance, achieving 1.4 dB NF - typically 0.5–0.8 dB lower than comparable single-gate devices at 800 MHz.