Infineon Technologies BFR93AE6327HTSA1

Overview

BFR93AE6327HTSA1 from Infineon Technologies is a low-noise silicon bipolar RF transistor in SOT23 package, designed for broadband amplifier stages operating at 900 MHz and 1.8 GHz with 5–30 mA collector current. It delivers NFmin ≤1.5 dB at 900 MHz, fT ≥4.5 GHz, Gma ≥14.5 dB, and supports automotive-grade reliability per AEC-Q101.

For engineers reviewing the BFR93AE6327HTSA1 datasheet, BFR93AE6327HTSA1 pinout, BFR93AE6327HTSA1 application, or BFR93AE6327HTSA1 equivalent, key selection criteria include noise figure at 900 MHz, transducer gain under 50 Ω matching, third-order intercept point (IP3), thermal resistance (RthJS = 130 K/W), and AEC-Q101 qualification status.

Technical Context

This NPN RF transistor operates in common-emitter configuration with emitter-grounded or base-grounded biasing options. Its high fT (typ. 6 GHz) and low Ccb (typ. 0.54 pF) enable stable broadband amplification up to 1.8 GHz while maintaining low noise performance.

DC current gain hFE ranges from 70 to 140 at IC = 30 mA and VCE = 8 V, supporting precise gain control in low-power RF front-ends. The device is ESD-sensitive (HBM Class 2), requiring handling per JEDEC JS-001.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package with gull-wing leads; standardized footprint compatible with automated assembly and reflow soldering. Thermal pad not present; heat dissipation relies on leadframe conduction through collector (Pin 3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise RF transistor applications.

Compared with BFR93AE6327HTSA1, BFP640FESD offers superior high-frequency noise and gain but demands more complex biasing, while MMD9335 trades noise and thermal performance for lower cost and simpler implementation in non-automotive designs.

Availability

BFR93AE6327HTSA1 is available at Aetrix Electronics and suitable for GPS L1 band receivers, automotive keyless entry systems, and ISM-band 868 MHz transceivers requiring stable component supply across production lifecycles.

Supply support for BFR93AE6327HTSA1 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, automotive electronics, and RF solutions, headquartered in Munich.

The BFR93A belongs to Infineon's discrete RF transistor product line, engineered for high-linearity, low-noise amplification in automotive and industrial wireless infrastructure.

FAQ

What is the recommended bias point for minimum noise figure?

For NFmin at 900 MHz, bias the BFR93AE6327HTSA1 at IC = 5 mA and VCE = 8 V with source impedance ZS = ZSopt ≈ 25 + j15 Ω. This point is verified in the datasheet's noise parameter tables and requires external matching network synthesis using measured S-parameters.

Is this device qualified for automotive use?

Yes - the BFR93AE6327HTSA1 carries full AEC-Q101 qualification per Infineon's published qualification report. It is rated for TJ = 150 °C and qualified across temperature cycling, HTRB, and ESD stress tests required for under-hood and cabin RF modules.

Can it be used in 2.4 GHz Bluetooth applications?

Yes - though optimized for 900 MHz/1.8 GHz, its fT ≥4.5 GHz and measured |S21|² ≥7 dB at 2.4 GHz support Bluetooth LE LNA use. Performance degrades vs. 1.8 GHz, so layout parasitics and matching must be tightly controlled to maintain NF & IP3.

What is the maximum allowable PCB temperature at the collector solder point?

The datasheet specifies TS ≤ 111 °C at the collector lead soldering point. Exceeding this violates the Ptot = 300 mW rating at TA = 25 °C; derating follows the Ptot vs. TS curve in Figure 4, reaching zero at TS = 150 °C.