Infineon Technologies BFP450H6327XTSA1

Overview

BFP450H6327XTSA1 from Infineon is a surface-mount silicon NPN RF bipolar transistor optimized for low-noise, high-linearity amplification up to 3 GHz. It features f_T = 24 GHz, NF_min = 1.7 dB at 1.9 GHz (3 V, 50 mA), OIP3 = 31 dBm at 1.9 GHz (3 V, 90 mA), and SOT343 package with emitter-grounded SIEGET™ architecture. It is qualified per JEDEC JESD47/JESD22 and AEC-Q101 for industrial and automotive RF front-end stages.

For engineers reviewing the BFP450H6327XTSA1 datasheet, BFP450H6327XTSA1 pinout, BFP450H6327XTSA1 application, or BFP450H6327XTSA1 equivalent, key selection criteria include noise figure vs. frequency trade-offs, OIP3 stability across 0.15–3.5 GHz, DC bias sensitivity (IC = 50–90 mA), and SOT343 thermal resistance (R_thJS = 120 K/W) in compact RF PCB layouts.

Technical Context

The BFP450 operates in grounded-emitter configuration using Infineon's fourth-generation SIEGET™ process, enabling high f_T (24 GHz typ.) and low C_CB (0.48 pF typ.) for wideband small-signal amplification. Its DC current gain h_FE ranges from 60–130 (V_CE = 3–4 V, I_C = 50–90 mA), supporting stable biasing in cascode or common-emitter topologies.

AC performance is characterized in 50 Ω test fixtures with Bias-Ts; minimum noise figure degrades from 1.55 dB at 150 MHz to 2.05 dB at 3.5 GHz, while OIP3 remains ≥29.5 dBm across 0.15–3.5 GHz under fixed 3 V / 90 mA bias - confirming robust linearity for multi-carrier ISM-band amplifiers.

Key Specifications

Pinout & Package

Package: SOT343 - 4-pin plastic surface-mount package with exposed emitter pad for thermal enhancement and RF grounding. Dimensions: 2.1 × 2.0 × 0.95 mm (L × W × H), lead pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BFP640H6327XTSA1 and MMA041107-TR1, the BFP450H6327XTSA1 offers balanced noise, gain, and linearity within a single-supply, 4-pin SOT343 footprint - making it optimal for cost-sensitive, space-constrained RF front ends where 30+ dBm OIP3 must be maintained across 0.15–3.5 GHz.

Availability

BFP450H6327XTSA1 is available at Aetrix Electronics and suitable for broadband amplifiers, low-noise ISM-band receivers, and automotive radar front ends requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BFP450H6327XTSA1 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 microcontrollers, and RF components, with global R&D centers and ISO/TS 16949-certified wafer fabs.

The BFP450 belongs to Infineon's fourth-generation RF bipolar transistor family, designed specifically for high-linearity, low-noise amplification in sub-6 GHz wireless infrastructure and automotive radar systems - emphasizing manufacturability, thermal robustness, and JEDEC/AEC-Q101 compliance.

FAQ

What is the recommended DC bias condition for optimal noise figure at 1.9 GHz?

The datasheet specifies NF_min = 1.7 dB at V_CE = 3 V and I_C = 50 mA. This condition requires precise base current control (I_B ≈ 0.5 mA, assuming h_FE = 100) and stable 3 V supply with <10 mV ripple. A resistive base bias network with emitter degeneration resistor (R_E ≈ 10 Ω) improves stability without significantly degrading NF.

Can BFP450H6327XTSA1 be used in Class AB amplifier configurations?

Yes - its h_FE range (60–130) and thermal resistance (120 K/W) support Class AB operation at I_C = 60–90 mA with V_CE = 3 V. However, linearity metrics (OIP3, OP1dB) are specified only for small-signal conditions; large-signal harmonic distortion must be measured on application-specific PCBs with calibrated load-pull setups.

Is the SOT343 package lead-free and RoHS-compliant?

Yes - Infineon confirms BFP450H6327XTSA1 meets RoHS Directive 2011/65/EU and JEDEC JS-001 ESD standards (HBM Class 2, ≥2 kV). The SOT343 package uses matte tin (Sn) plating over copper leadframe, with no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE content.

How does the dual-emitter pin (Pins 2 and 4) affect PCB layout?

Pins 2 and 4 are internally connected to the same emitter region and must be tied to the same low-impedance RF ground plane. Layout best practice requires symmetric thermal vias (≥4 × 0.3 mm) under both pins, with minimal trace length (<0.5 mm) to avoid inductive imbalance that degrades high-frequency gain flatness and noise performance above 2 GHz.