Infineon Technologies BAR6406WE6327HTSA1

Overview

BAR6406WE6327HTSA1 from Infineon Technologies is a silicon PIN diode optimized for high-voltage, current-controlled RF switching and attenuation in 50 Ω systems. It delivers 0.17 pF capacitance at 0 V reverse bias (1–1.8 GHz), 2.1 Ω forward resistance at 10 mA, and >22 dB isolation at 1.8 GHz - enabling compact, low-distortion RF front-end designs for cellular infrastructure and WLAN transceivers.

For engineers reviewing the BAR6406WE6327HTSA1 datasheet, BAR6406WE6327HTSA1 pinout, BAR6406WE6327HTSA1 application, or BAR6406WE6327HTSA1 equivalent, key selection criteria include RF insertion loss (≤0.16 dB @ 1.8 GHz, 10 mA), reverse voltage rating (150 V), thermal resistance (R_thJS ≤ 115 °C/W), and AEC-Q101 qualification status for automotive-grade reliability.

Technical Context

This PIN diode operates as a voltage-variable RF resistor: its I-region width (50 µm) and carrier lifetime (1550 ns) enable precise control of RF impedance across 1 MHz–6 GHz. Forward conduction modulates series resistance (0.85–12.5 Ω), while reverse bias maintains ultra-low capacitance (<0.35 pF) and high isolation (>14.5 dB up to 5.6 GHz).

The device uses a common-anode dual-diode configuration in SOT323 package, supporting series-switch topologies in 50 Ω signal paths. Its thermal design supports continuous operation up to +115 °C junction temperature with 250 mW total power dissipation and R_thJS ≤ 115 °C/W.

Key Specifications

Pinout & Package

BAR6406WE6327HTSA1 is housed in a RoHS-compliant SOT323 plastic package with gull-wing leads and common-anode configuration. The package measures 2.1 mm × 1.25 mm × 0.95 mm and supports reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMV1232-011LF and BAP64-05W, BAR6406WE6327HTSA1 uniquely combines AEC-Q101 compliance, 150 V reverse rating, and common-anode dual-diode topology - making it the only choice for thermally demanding, safety-critical automotive radar and base station switch designs.

Availability

BAR6406WE6327HTSA1 is available at Aetrix Electronics and suitable for cellular infrastructure, Wi-Fi 6 FEMs, and automotive radar systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for BAR6406WE6327HTSA1 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 ICs, with global manufacturing and quality certification to ISO/TS 16949 and AEC standards.

BAR6406WE6327HTSA1 belongs to Infineon's BAR64 family of high-frequency PIN diodes, engineered specifically for current-controlled RF switching, attenuation, and protection in 5G, Wi-Fi 6/7, and ADAS radar front-ends.

FAQ

What is the maximum DC forward current rating for BAR6406WE6327HTSA1?

The absolute maximum DC forward current is 100 mA at T_S ≤ 115 °C. Derating applies above this case temperature: the device supports 100 mA up to 115 °C, but only 60 mA at 125 °C ambient per thermal curves in the datasheet. Pulse operation allows higher peak currents (IF_max/IF_DC = 0.5 at t_p = 10 µs, D = 0).

Does BAR6406WE6327HTSA1 require a series current-limiting resistor in bias networks?

Yes - because it is a current-controlled device, a precision series resistor (typically 100–470 Ω) is mandatory to convert applied bias voltage into controlled forward current (e.g., 3–10 mA for low-loss switching). Without it, excessive current can exceed 100 mA and cause thermal runaway or junction failure.

Can BAR6406WE6327HTSA1 be used in shunt-switch configurations?

No - its common-anode dual-diode structure is optimized for series-switch or series-shunt attenuator topologies. For shunt switching, a single-cathode or common-cathode diode (e.g., BAP64-04) is required. Using BAR6406WE6327HTSA1 in shunt mode would short both RF paths through the shared anode.

How does BAR6406WE6327HTSA1 perform at 5.6 GHz compared to 1.8 GHz?

At 5.6 GHz, isolation drops to 8.5 dB (vs. 22 dB at 1.8 GHz) and insertion loss rises to ~0.45 dB (vs. 0.16 dB), due to increasing skin effect and parasitic reactance. However, its 0.35 pF capacitance remains usable for harmonic suppression and EMI filtering up to 6 GHz, though primary switching performance is rated for ≤3 GHz.