Infineon Technologies BAR81WE6327

Overview

BAR81WE6327 from Infineon Technologies is a silicon RF switching diode configured as a single shunt-diode in SOT343 package, rated for 30 V reverse voltage, 100 mA forward current, and optimized for λ/4 short–open transformation in high-frequency RF switches operating up to 1.89 GHz.

For engineers reviewing the BAR81WE6327 datasheet, BAR81WE6327 pinout, BAR81WE6327 application, or BAR81WE6327 equivalent, key selection criteria include shunt insertion loss (≤30 dB at 1.89 GHz), isolation (≥0.7 dB at 1.89 GHz), diode capacitance (0.57–0.9 pF at 1–3 V), forward resistance (0.7–1 Ω at 100 MHz), and AEC-Q101 qualification for automotive RF front-end modules.

Technical Context

This diode operates in shunt configuration where the anode serves as RF signal passage and cathode connects to ground; optimal isolation requires a low-inductance ground path with series inductance ≤0.15 nH to chip ground. Its I-region width of 3.5 µm enables fast carrier lifetime (80 ns) and low charge storage.

Designed for RF switch topologies requiring high off-state isolation and minimal on-state loss, it supports DC blocking, antenna switching, and transmit/receive (T/R) path selection in sub-2 GHz wireless infrastructure and automotive radar front ends.

Key Specifications

Pinout & Package

SOT343 (SC-82AB) 4-pin plastic package with exposed thermal pad; pin 1 = anode (RF input), pin 2 = cathode (ground), pin 3 = cathode (ground), pin 4 = anode (RF output); dual-anode/dual-cathode layout supports balanced shunt placement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAR81WE6327, BAR81W offers identical RF behavior but different packaging logistics, while BAR81WH6327 adds halogen-free material compliance-both maintain full AEC-Q101 qualification and preserve shunt insertion loss ≤30 dB and isolation ≥0.7 dB at 1.89 GHz.

Availability

BAR81WE6327 is available at Aetrix Electronics and suitable for automotive radar front ends, GNSS antenna switching, and Wi-Fi band selection requiring stable component supply, AEC-Q101 validation, and consistent RF performance across production lots.

Supply support for BAR81WE6327 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, RF, and automotive ICs, with global R&D and wafer fabrication facilities.

The BAR81W series belongs to Infineon's high-frequency discrete diode product line, engineered specifically for shunt-mode RF switching in automotive and wireless infrastructure applications demanding AEC-Q101 reliability and sub-2 GHz performance.

FAQ

What is the maximum RF frequency supported by BAR81WE6327?

BAR81WE6327 is characterized up to 1.89 GHz for shunt insertion loss and isolation; its 0.57–0.9 pF capacitance and 0.7–1 Ω forward resistance support stable operation through 2.4 GHz in well-designed λ/4 stub circuits, though datasheet guarantees apply only at 1.89 GHz.

Can BAR81WE6327 be used in series-switch configuration?

No-BAR81WE6327 is explicitly designed and characterized for shunt configuration only. Its pinout (dual anode/dual cathode), low series inductance (0.15 nH), and application notes assume cathode-grounded operation; series use would degrade isolation and violate thermal derating limits.

Is BAR81WE6327 pin-compatible with BAR81WH6327?

Yes-BAR81WE6327 and BAR81WH6327 share identical SOT343 package outline, pin assignment, solder footprint, and thermal pad layout; the only difference is halogen-free molding compound in BAR81WH6327, with no impact on PCB assembly or mechanical fit.

Does BAR81WE6327 require external bias circuitry?

Yes-BAR81WE6327 requires DC bias to control on/off state: forward bias (≥0.93 V at 100 mA) for low-resistance shunt path, reverse bias (≥3 V) for high-capacitance isolation state; typical designs use CMOS-level GPIO with series resistor and RF choke.