Infineon Technologies BFP740E6327HTSA1

Overview

BFP740E6327HTSA1 from Infineon Technologies is an NPN RF bipolar transistor optimized for high-frequency amplification up to 42 GHz, with 4.7 V collector-emitter breakdown voltage (V_CEO), 50 mA maximum collector current (I_C), and 18 dB typical gain at 2 GHz, used in low-noise amplifier stages of 5G front-end modules and satellite communication receivers.

For engineers reviewing the BFP740E6327HTSA1 datasheet, BFP740E6327HTSA1 pinout, BFP740E6327HTSA1 application, or BFP740E6327HTSA1 equivalent, key selection criteria include f_T = 42 GHz, NF = 0.75 dB at 2 GHz, P_1dB = +12.5 dBm, SOT343-4 package thermal resistance (R_thJC = 160 K/W), and DC bias compatibility with 3–4.5 V supply rails.

Technical Context

This RF transistor employs a silicon bipolar process with epitaxial base and gold metallization for stable high-frequency performance. Its f_T of 42 GHz and f_max of 65 GHz enable operation in L-, S-, and C-band amplifiers, while the integrated emitter ballasting resistor improves gain flatness and stability.

The device operates in common-emitter configuration with DC bias applied via base and collector terminals; emitter is grounded. Input/output matching networks are required for optimal noise figure and power gain-typical 50 Ω input return loss exceeds 10 dB from 1–3 GHz.

Key Specifications

Pinout & Package

SOT343-4 is a 4-pin, leadless surface-mount plastic package with exposed thermal pad; dimensions 2.1 × 2.0 × 0.95 mm; JEDEC MO-229 compatible; recommended reflow profile per IPC-J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BFP640FESD and MMA040407-12, BFP740E6327HTSA1 uniquely balances 42 GHz f_T, 0.75 dB NF, and 4.7 V V_CEO in SOT343-4-making it optimal for compact 5G and dual-band GNSS designs requiring both bandwidth headroom and noise-critical performance.

Availability

BFP740E6327HTSA1 is available at Aetrix Electronics and suitable for 5G infrastructure, precision GNSS navigation, satellite TV LNB modules, and radar altimeter systems requiring stable component supply across multi-year production cycles.

Supply support for BFP740E6327HTSA1 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, sensor, and RF solutions, with global manufacturing and R&D centers across Europe, Asia, and the US.

The BFP740E6327HTSA1 belongs to Infineon's BFP high-frequency transistor family, designed specifically for low-noise, high-gain amplification in wireless infrastructure, automotive radar, and satellite communication front-ends.

FAQ

What is the recommended DC bias condition for optimal noise figure?

For minimum noise figure at 2 GHz, apply V_CE = 3.0 V, I_C = 15 mA, and V_BE ≈ 0.85 V. This bias point achieves 0.75 dB NF with 15 dB associated gain. Base current is ~150 µA; use a 10 kΩ series resistor from 3.3 V rail to ensure stable bias under temperature variation.

Can BFP740E6327HTSA1 be used in common-base configuration?

Yes-common-base operation is supported with emitter as input and collector as output. At 2 GHz, this yields ~12 dB gain and 1.2 dB NF. However, input impedance drops to ~10 Ω, requiring precise microstrip matching; the datasheet specifies S-parameters only for common-emitter mode.

Is the thermal pad electrically isolated?

No-the exposed thermal pad is internally connected to the emitter (Pin 1). It must be soldered to a grounded copper area on the PCB. Floating or biased thermal pads cause instability and violate JEDEC MO-229 mechanical and thermal specifications.

Does this part support RoHS-compliant reflow profiles?

Yes-BFP740E6327HTSA1 is RoHS-compliant and qualified for lead-free reflow per IPC-J-STD-020 Class 3. Peak temperature must not exceed 260 °C for ≤ 30 seconds; ramp rate limited to 3 °C/s max to prevent delamination or wire-bond stress.