Infineon Technologies BAT6406WH6327XTSA1

Overview

BAT6406WH6327XTSA1 from Infineon Technologies is a silicon Schottky diode in SCD80 package configured as a common anode dual diode, rated for 40 V reverse voltage, 250 mA forward current, and 5 ns reverse recovery time, used for low-loss clamping and bias isolation in automotive sensor signal conditioning circuits.

For engineers reviewing the BAT6406WH6327XTSA1 datasheet, BAT6406WH6327XTSA1 pinout, BAT6406WH6327XTSA1 application, or BAT6406WH6327XTSA1 equivalent, key selection criteria include its 40 V VR rating, 370 mV VF at 30 mA, 4–6 pF capacitance at 1 V, AEC-Q101 qualification, and SCD80 thermal resistance of ≤155 K/W.

Technical Context

This dual common-anode Schottky diode enables compact bidirectional clamping with matched characteristics across both diodes. Its low 370 mV forward voltage at 30 mA and 5 ns trr support high-efficiency, fast transient response in low-voltage analog front-ends.

The SCD80 package provides enhanced thermal performance (RthJS ≤155 K/W) versus standard SOT-23 variants, enabling sustained 250 mW dissipation at TS ≤111°C - critical for under-hood automotive modules operating up to 125°C ambient.

Key Specifications

Pinout & Package

Package: SCD80 - surface-mount plastic package with exposed thermal pad, 2.5 mm × 1.45 mm footprint, 0.7 mm height, optimized for thermal dissipation in space-constrained automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky diode clamping applications.

Compared with SBAT64-06W, BAT6406WH6327XTSA1 offers identical performance and qualification; versus NSR0230HT1G, it delivers higher VR, dual-diode integration, and automotive-grade reliability at the expense of slightly larger footprint.

Availability

BAT6406WH6327XTSA1 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial analog signal chains, and USB ESD protection requiring stable component supply and AEC-Q101 compliance.

Supply support for BAT6406WH6327XTSA1 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, automotive ICs, and discrete devices with global manufacturing and qualification infrastructure.

BAT6406WH6327XTSA1 belongs to Infineon's BAT64 series of AEC-Q101-qualified Schottky diodes designed specifically for robust signal-level protection and bias isolation in harsh automotive environments.

FAQ

What is the maximum junction temperature and how does it relate to board-level thermal design?

The absolute maximum junction temperature is 150 °C. With RthJS ≤155 K/W and a maximum soldering point temperature of 111 °C, designers must ensure PCB copper area and airflow keep the thermal pad temperature ≤111 °C to maintain safe Tj margin. Derating curves in Figure 5 confirm 250 mA operation is sustainable at TS = 111 °C.

Is BAT6406WH6327XTSA1 suitable for bidirectional ESD protection on differential pairs?

Yes - its common-anode configuration allows one diode to clamp positive transients to VCC and the other to clamp negative transients to GND. Combined with 5 ns trr and ≤6 pF capacitance, it maintains signal integrity on differential lines up to 100 MHz without skew or attenuation.

How does the integrated guard ring improve reliability in humid environments?

The diffused guard ring reduces surface leakage current at the diode junction periphery, preventing premature breakdown under high humidity and bias stress. This is validated in AEC-Q101 HTRB testing (1000 hrs at 125 °C, 85% RH), where guarded devices show <10% IR drift versus >50% in unguarded equivalents.

Can this part replace BAT64-06W in existing designs?

Yes - BAT6406WH6327XTSA1 is the commercial-grade tape-and-reel variant of BAT64-06W with identical electrical, thermal, and mechanical specifications. The "H6327" suffix denotes packaging format (7-inch reel, 8,000 pcs), and "XTSA1" indicates Infineon's standard product marking code; no layout or soldering changes are needed.