Infineon Technologies BGR420H6327XTSA1

Overview

BGR420H6327XTSA1 from Infineon Technologies is an NPN silicon RF transistor with integrated bias circuitry in SOT343 package, designed for 0.4 GHz low-noise amplification. It delivers 26 dB gain (S21), 1.5 dB noise figure, and 13 mA quiescent collector current at 3.6 V VCC - used in cellular front-end LNAs where compact bias-stable RF gain is required.

For engineers reviewing the BGR420H6327XTSA1 datasheet, BGR420H6327XTSA1 pinout, BGR420H6327XTSA1 application, or BGR420H6327XTSA1 equivalent, key selection criteria include verified 0.4 GHz NF/S21 performance, on-chip bias network eliminating external resistors, SOT343 thermal resistance ≤290 K/W, and RoHS-compliant Pb-free construction.

Technical Context

The BGR420 integrates a monolithic NPN RF transistor with on-die bias resistors, enabling fixed 13 mA ICC at VCC = 3.6 V and VBB = 2.8 V without external bias components. Its SIEGET® 25 GHz fT-line architecture supports stable small-signal amplification up to 1.8 GHz.

It operates in common-emitter configuration with an internal emitter-collector diode that does not impair RF function. DC blocking is required at RFIN and RFOUT per test circuit Figure 2; matching networks are needed for optimal S11/S22 return loss.

Key Specifications

Pinout & Package

SOT343 package: 1.3 mm × 1.3 mm × 0.9 mm body, 4-terminal leadless plastic package with exposed emitter pad for thermal conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BGR420H6327XTSA1, BFP420H6327XTSA1 trades bias simplicity for higher-frequency capability, while MMA040407-12 sacrifices integration for superior linearity - making BGR420 optimal for cost- and space-constrained sub-1 GHz LNA designs requiring plug-and-play bias.

Availability

BGR420H6327XTSA1 is available at Aetrix Electronics and suitable for GSM/EDGE handset design, ISM-band wireless sensor development, and GPS L1 front-end prototyping requiring stable component supply and full traceability.

Supply support for BGR420H6327XTSA1 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, and RF solutions, with global R&D and manufacturing infrastructure.

The BGR420 belongs to Infineon's SIEGET® RF transistor family, engineered specifically for high-volume, low-cost mobile and IoT receiver front ends demanding integrated bias and consistent 0.4–1.8 GHz performance.

FAQ

Is BGR420H6327XTSA1 pin-compatible with BFP420H6327XTSA1?

No. Although both use SOT343 packages, BGR420 pin 4 is VBB (bias input), while BFP420 pin 4 is GND. Swapping them causes incorrect biasing and potential damage. Layouts must be redesigned for each part's unique pin function mapping.

What is the recommended DC blocking capacitor value for RFIN and RFOUT?

For 0.4 GHz operation, a 100 pF NP0/C0G capacitor is recommended at both RFIN and RFOUT. This provides <0.2 Ω reactance at 0.4 GHz while maintaining stability across temperature and bias; larger values risk resonance with package inductance.

Does the internal emitter-collector diode affect small-signal AC performance?

No - the internal diode is reverse-biased under normal common-emitter operation (VCE > 0). It remains non-conductive and electrically invisible in S-parameter measurements, as confirmed by S12 isolation >23 dB and unchanged S21 gain across frequency sweeps.

Can BGR420H6327XTSA1 operate at VCC = 5 V?

No. Absolute maximum VCC is 13 V, but electrical characteristics are only specified at VCC = 3.6 V. At 5 V, ICC exceeds 20 mA (max rated), risking thermal runaway and accelerated degradation. Operation outside 3.3–3.6 V violates datasheet conditions and voids performance guarantees.