Infineon Technologies BAT 64 B5003

Overview

BAT64 B5003 from Infineon Technologies is a silicon Schottky diode in SOT-23 package configured as a single anode-cathode junction, rated for 40 V reverse voltage, 250 mA forward current, and 5 ns reverse recovery time-optimized for low-loss clamping and bias isolation in precision analog front-ends and metering circuits.

For engineers reviewing the BAT64 B5003 datasheet, BAT64 B5003 pinout, BAT64 B5003 application, or BAT64 B5003 equivalent, this device serves as a high-speed, low-VF protection diode where fast switching, minimal forward drop (<370 mV at 30 mA), and low capacitance (4–6 pF) are critical for signal integrity in RF detector and ESD-sensitive measurement paths.

Technical Context

The BAT64 B5003 implements a planar silicon Schottky barrier structure with integrated diffused guard ring to suppress edge breakdown and ensure stable 40 V VR rating. Its low series inductance (1.8 nH) and 4–6 pF junction capacitance support operation up to UHF frequencies in detector and clamp roles.

Designed for AEC-Q101 qualification, it delivers robust thermal performance with RthJS ≤ 255 K/W (SOT-23) and operates across –55 °C to +150 °C junction temperature range-enabling use in automotive sensor interfaces and industrial metering where reliability under thermal cycling is mandatory.

Key Specifications

Pinout & Package

Package: SOT-23 (JEDEC TO-236AB), 3-pin surface-mount plastic case with cathode marked by bar on pin 3.

Key Features

Applications

Availability

BAT64 B5003 is available at Aetrix Electronics and suitable for meter protection, RF detection, bias isolation, and ESD-sensitive analog interface applications requiring stable component supply across automotive, industrial, and test equipment programs.

Supply support for BAT64 B5003 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 electronics, and industrial control ICs and discrete devices.

The BAT64 series belongs to Infineon's high-speed silicon Schottky diode product line, engineered specifically for low-loss, fast-recovery applications in precision analog measurement, RF detection, and automotive sensor interfaces.

FAQ

What is the maximum continuous forward current for BAT64 B5003?

The BAT64 B5003 is rated for 250 mA average forward current (IF) at TA = 25 °C with junction temperature limited to 150 °C. Derating applies above 25 °C ambient; full 250 mA is sustainable only when solder-point temperature remains ≤86 °C per the RthJS ≤255 K/W specification.

Does BAT64 B5003 have a built-in ESD protection structure?

No-BAT64 B5003 itself is an ESD-sensitive device (HBM Class 2, ≥2 kV), not an ESD protection component. It requires external handling precautions and is often used *as* the protected element in sensitive analog paths; its low VF and fast trr make it suitable for clamping transients when paired with upstream resistors or TVS devices.

Can BAT64 B5003 replace BAT64-04W in a design?

No-BAT64 B5003 uses SOT-23 packaging with single-diode configuration, while BAT64-04W is in SOT-323 and configured as a series pair. Their pinouts, thermal ratings (RthJS 255 vs. 155 K/W), and electrical behavior differ significantly; direct substitution would require PCB layout and bias network redesign.

Is BAT64 B5003 RoHS compliant?

Yes-BAT64 B5003 is Pb-free and RoHS compliant per Infineon's 2007 datasheet revision, with no lead-containing variants offered in standard distribution. The "1Pb-containing package may be available upon special request" note applies only to legacy non-RoHS variants not associated with the B5003 marking.