Infineon Technologies BAR6405WE6327BTSA1

Overview

BAR6405WE6327BTSA1 from Infineon Technologies is a silicon PIN diode optimized for RF attenuator and switch applications in high-frequency systems up to 6 GHz. It delivers very low capacitance (0.17 pF at 0 V, 1–1.8 GHz), low forward resistance (2.1 Ω @ 10 mA, 100 MHz), and high reverse voltage rating (150 V), enabling precise RF signal control in cellular front-end modules.

For engineers reviewing the BAR6405WE6327BTSA1 datasheet, BAR6405WE6327BTSA1 pinout, BAR6405WE6327BTSA1 application, or BAR6405WE6327BTSA1 equivalent, key selection criteria include RF insertion loss (0.16 dB @ 10 mA, 1.8 GHz), isolation (17 dB @ 1.8 GHz), thermal resistance (340 K/W), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This PIN diode operates as a voltage-controlled RF resistor: forward bias reduces series resistance for low-loss signal path conduction, while reverse bias maximizes impedance via depletion-layer capacitance control. Its I-region width (50 µm) and charge carrier lifetime (1550 ns) are tuned for minimal distortion and stable intermodulation performance (IP3 > +40 dBm @ 900/1800 MHz).

The device uses a common-cathode dual-diode configuration in SOT323 package, supporting series or shunt switching topologies. Its low CT (0.17 pF typ. @ 0 V, 1.8 GHz) and high RP (3 kΩ @ 1.8 GHz, 0 V) ensure broadband matching and high off-state isolation across 0.9–5.6 GHz.

Key Specifications

Pinout & Package

BAR6405WE6327BTSA1 is housed in a RoHS-compliant SOT323 (SC-70) surface-mount package with gull-wing leads and common-cathode dual-diode configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PIN diode RF switching applications.

Compared with SMV1232-079LF and BAP64-05W, BAR6405WE6327BTSA1 uniquely combines AEC-Q101 qualification, 150 V VR rating, and 340 K/W thermal resistance-making it the only option suitable for high-reliability automotive antenna tuning modules requiring sustained 100 mA forward current at 125 °C ambient.

Availability

BAR6405WE6327BTSA1 is available at Aetrix Electronics and suitable for cellular front-end modules, automotive telematics systems, and industrial wireless gateways requiring stable component supply and long-term lifecycle support.

Supply support for BAR6405WE6327BTSA1 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 leader specializing in power management, RF, and automotive electronics, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

This part belongs to Infineon's BAR64 family of high-frequency PIN diodes, engineered specifically for RF attenuation, switching, and antenna tuning in 4G/5G infrastructure and automotive connectivity systems.

FAQ

What is the maximum continuous forward current for BAR6405WE6327BTSA1?

The maximum DC forward current is 100 mA at case temperature ≤65 °C. Derating is required above this temperature: at 125 °C ambient, maximum allowable IF drops to 40 mA due to thermal resistance (340 K/W) and junction temperature limit (150 °C). Pulse operation allows higher peak currents (IFmax/IFDC = 0.5 at tp = 10 ms, D = 0).

Does BAR6405WE6327BTSA1 support DC blocking in RF paths?

No - BAR6405WE6327BTSA1 is a PIN diode designed for RF signal control under forward or reverse bias, not as a DC-blocking capacitor. Its structure lacks inherent DC isolation; external capacitors must be added in series if DC blocking is required in the signal path.

How does the common-cathode configuration affect PCB layout?

The common-cathode arrangement (Pins 1 & 3 = anodes, Pin 2 = shared cathode) simplifies grounding by allowing a single low-inductance connection to RF ground. This reduces layout asymmetry and improves isolation between switched paths, especially critical in SPDT switch designs operating above 1 GHz.

Is BAR6405WE6327BTSA1 compatible with lead-free reflow profiles?

Yes - the SOT323 package is qualified for standard Pb-free reflow per JEDEC J-STD-020, with peak temperature tolerance up to 260 °C (10 sec max). Moisture sensitivity level is MSL1, eliminating bake requirements prior to assembly.