Infineon Technologies BFG 235 E6327

Overview

BFG 235 E6327 from Infineon Technologies is an NPN silicon RF transistor optimized for broadband output amplifier stages in antenna and telecommunication systems up to 2 GHz, with f_T = 5.5 GHz, V_CEO = 15 V, I_C = 300 mA max, and integrated emitter ballast resistor for improved linearity in DECT/PCN power amplifiers.

For engineers reviewing the BFG 235 E6327 datasheet, BFG 235 E6327 pinout, BFG 235 E6327 application, or BFG 235 E6327 equivalent, key selection criteria include its 900 MHz transducer gain (6.5 dB), third-order intercept point (IP3 = 33 dBm), noise figure (1.7 dB), thermal resistance (R_thJS ≤ 35 K/W), and SOT223 package suitability for high-reliability RF PCB layouts.

Technical Context

This RF transistor operates as a high-linearity, medium-power NPN amplifier stage with emitter ballasting for stable biasing under varying temperature and process conditions. Its f_T of 5.5 GHz and G_ma of 12.5 dB at 900 MHz support wideband operation in 800–2000 MHz bands.

Designed for Class AB push-pull or single-ended output stages, it delivers 33 dBm OIP3 at 200 mA collector current and 8 V V_CE, with C_cb = 2.2 pF and C_eb = 14 pF enabling impedance matching networks for 50 Ω systems.

Key Specifications

Pinout & Package

SOT223 package with exposed collector tab for thermal conduction; 4-pin configuration with dual emitter terminals for current sharing and ballast integration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BFP640 and MRF581, the BFG 235 E6327 uniquely balances 2 GHz bandwidth, 200–250 mA drive capability, and SOT223 thermal performance-making it optimal for cost-sensitive, space-constrained DECT/PCN and ISM band transmitters where 15 V supply and 2 W dissipation define the operating envelope.

Availability

BFG 235 E6327 is available at Aetrix Electronics and suitable for DECT base stations, PCN handset power amplifiers, ISM band wireless links, and industrial telemetry transmitters requiring stable component supply with automotive-grade reliability and RoHS compliance.

Supply support for BFG 235 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 AG is a German semiconductor manufacturer specializing in power management, RF, automotive, and security ICs, with global manufacturing and R&D centers.

The BFG 235 E6327 belongs to Infineon's legacy RF bipolar transistor product line, designed specifically for high-linearity, medium-power RF amplification in consumer and industrial wireless infrastructure operating below 2 GHz.

FAQ

What is the recommended DC bias condition for optimal linearity in 900 MHz operation?

For best linearity at 900 MHz, bias the BFG 235 E6327 at V_CE = 8 V and I_C = 200 mA using a stabilized base current source or emitter-degenerated configuration. This achieves 33 dBm OIP3 and 6.5 dB transducer gain with Z_S = Z_L = 50 Ω, as verified in the official Infineon characterization data.

Can the dual-emitter configuration be used for paralleling two devices?

No-the dual emitter (Pins 1 and 3) is internal to a single die and intended for distributed ballasting, not device paralleling. Paralleling requires separate packages with matched h_FE and thermal paths; use discrete SOT223 units with external emitter resistors if higher current is needed.

Is the SOT223 thermal pad electrically isolated from the collector?

Yes-the exposed thermal pad on the SOT223 package is internally connected to the collector (Pin 4). It must be soldered to a dedicated copper pour tied to the collector net for both thermal conduction and electrical integrity; floating or grounded pads cause instability or failure.

Does AEC-Q101 qualification cover pulsed RF operation?

Yes-AEC-Q101 qualification includes high-temperature reverse bias (HTRB), temperature cycling, and ESD tests performed under representative pulsed DC stress conditions. While RF-specific lifetime testing isn't part of the standard, the qualification confirms robustness for repetitive 900 MHz RF pulses with duty cycles ≤50% and peak I_C ≤300 mA.