Infineon Technologies BFP540ESDH6327XTSA1

Overview

BFP540ESDH6327XTSA1 from Infineon is a silicon NPN RF bipolar transistor in SOT343 package, designed for low-noise amplification at 1.8 GHz with NFmin = 0.9 dB, Gms = 21.5 dB, and OIP3 = 24.5 dBm under 2 V / 20 mA bias; used as LNA in DVB-T and FM/AM radio front-ends.

For engineers reviewing the BFP540ESDH6327XTSA1 datasheet, BFP540ESDH6327XTSA1 pinout, BFP540ESDH6327XTSA1 application, or BFP540ESDH6327XTSA1 equivalent, key selection criteria include noise figure at 1.8 GHz, ESD robustness (1 kV HBM), transition frequency (fT = 21–30 GHz), collector-emitter breakdown voltage (V(BR)CEO = 4.5 V), and SOT343 thermal resistance (RthJS = 290 K/W).

Technical Context

This grounded-emitter (SIEGET™) RF transistor operates in Class-A small-signal amplification mode with fixed VCE = 2 V biasing. Its high fT (21–30 GHz) and low CCB (0.14–0.24 pF) support stable broadband gain up to 3 GHz while minimizing Miller effect.

The integrated ESD protection structure enables 1 kV HBM tolerance without external circuitry, and its qualified AEC-Q101 and JEDEC industrial reliability certification confirms suitability for harsh ambient environments in broadcast and wireless infrastructure.

Key Specifications

Pinout & Package

Package: SOT343 - surface-mount plastic package with 4 terminals, 1.3 mm × 1.3 mm footprint, 0.95 mm height, and exposed emitter pad for thermal conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BFP540ESDH6327XTSA1, the BFP640F variant improves noise performance at the expense of cost and power efficiency, while the MMA040407-12 trades linearity for ruggedness-making the BFP540ESD optimal for cost-sensitive, high-volume broadcast LNAs where 0.9 dB NFmin and 24.5 dBm OIP3 strike the best balance.

Availability

BFP540ESDH6327XTSA1 is available at Aetrix Electronics and suitable for DVB-T tuner modules, FM/AM radio receivers, LNB assemblies, and cordless phone base stations requiring stable component supply across multi-year production cycles.

Supply support for BFP540ESDH6327XTSA1 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 ICs, and RF components, with global R&D and manufacturing infrastructure.

The BFP540ESD belongs to Infineon's fifth-generation SIEGET™ RF bipolar transistor family, engineered specifically for high-linearity, low-noise amplification in broadcast and wireless communication front-ends.

FAQ

What is the maximum continuous collector current for BFP540ESDH6327XTSA1?

The absolute maximum collector current is 80 mA, but the recommended operating range is 5–20 mA for optimal noise and linearity performance. At 20 mA, the device delivers 21.5 dB gain and 24.5 dBm OIP3 at 1.8 GHz; exceeding 20 mA increases thermal stress without proportional RF benefit due to SOT343's 250 mW power limit.

Does BFP540ESDH6327XTSA1 require external ESD protection?

No external ESD protection is required-the device integrates on-chip structures rated for 1 kV HBM per JEDEC JS-001. This eliminates discrete TVS diodes in RF paths, preserving signal integrity and reducing board area. However, standard ESD handling precautions (wrist straps, grounded workstations) must still be observed during assembly.

Can BFP540ESDH6327XTSA1 operate at 3 GHz with usable gain?

Yes-it delivers 14 dB transducer gain at 3 GHz under 2 V / 20 mA bias, though noise figure rises to 1.3 dB and OIP3 drops to ~22 dBm. For 3 GHz designs, layout parasitics and matching network accuracy become critical; the 30 GHz fT ensures stability, but gain flatness requires careful microstrip tuning per application note AN268.

What is the thermal derating behavior above 77 °C soldering point temperature?

Total power dissipation linearly derates from 250 mW at TS ≤ 77 °C to zero at TS = 150 °C, following Ptot = 250 × (1 − (TS − 77)/73) mW. At TS = 100 °C, Ptot drops to 192 mW; this must be accounted for in copper pour design and airflow modeling to maintain TJ ≤ 150 °C under worst-case ambient conditions.