Diodes Incorporated ZLLS500QTA

Overview

ZLLS500QTA from Diodes Incorporated is a 40 V, 700 mA Schottky barrier diode in a SOT-23 package with AEC-Q101 qualification support. It is designed for compact, low-leakage, low-forward-voltage operation in power-management and automotive-oriented discrete diode positions.

For engineers reviewing the ZLLS500QTA datasheet, ZLLS500QTA pinout, ZLLS500QTA application, or ZLLS500QTA equivalent, this part is most relevant for DC-DC converters, strobes, mobile telecom equipment, charging circuits, motor-control boards, rail steering, reverse-polarity protection, and repair programs requiring 40 V blocking, 700 mA current, low leakage, fast Schottky switching, SOT-23 assembly, and AEC-Q101 qualification.

Technical Context

ZLLS500QTA belongs to the ZLLS low-leakage Schottky family. Its design focus is balancing low forward voltage with extremely low leakage, which is valuable in battery-powered or high-temperature systems where ordinary Schottky leakage can become a standby-current or thermal concern.

The SOT-23 package is compact and familiar to assembly lines, but 700 mA operation still requires thermal review. The part's Schottky behavior is useful for fast switching, charging, and converter-related paths, while the 40 V rating sets the boundary for reverse-bias and transient evaluation.

Key Specifications

Pinout & Package

ZLLS500QTA is supplied in a SOT-23 package. The anode and cathode terminals must match the intended current direction, and the package marking should be checked during incoming inspection. In small Schottky packages, both polarity and heat-spreading copper affect final reliability.

Key Features

• 40 V, 700 mA Schottky barrier diode in SOT-23 package.
• Extremely low leakage behavior for standby-sensitive designs.
• Low forward voltage for efficient low-voltage current paths.
• Fast Schottky switching suitable for converters and charging circuits.
• 13 A surge-current class capability for short non-repetitive events.
• Thermally rated package family for high-temperature operation when derated.
• AEC-Q101 qualified and PPAP capable for automotive-oriented sourcing.
• RoHS-compliant and Green device construction.

Applications

Equivalent & Alternatives

When evaluating ZLLS500QTA equivalent devices, compare reverse voltage, forward current, forward voltage, leakage at temperature, surge-current capability, SOT-23 footprint, AEC-Q101 need, package marking, and tape-and-reel suffix.

Quality

ZLLS500QTA should be sourced as original Diodes Incorporated low-leakage Schottky diodes through traceable and controlled supply channels. Quality checks may include SOT-23 package inspection, top-mark review, reel label verification, solderability testing, forward-voltage screening, reverse-leakage testing, AEC-Q101 and PPAP requirement review, polarity verification, and incoming inspection for automotive-oriented assemblies.

Availability

ZLLS500QTA is available at Aetrix Electronics and suitable for DC-DC converters, charging circuits, mobile telecom equipment, strobes, motor-control boards, rail steering, reverse-polarity protection, and repair programs requiring a 40 V, 700 mA low-leakage SOT-23 Schottky diode.

Supply support may include scheduled delivery planning, volume procurement support, BOM continuity assistance, traceable sourcing management, and lifecycle availability coordination for automotive electronics suppliers, telecom equipment builders, power-module producers, contract manufacturers, and repair groups.

For production deployment, confirming the SOT-23 footprint, cathode orientation, 40 V margin, 700 mA current path, low-leakage requirement, forward-voltage loss, surge exposure, AEC-Q101 need, solder process, and sourcing continuity helps reduce diode qualification risk.

Manufacturer

Diodes Incorporated supplies Schottky diodes, low-leakage discrete products, rectifiers, SBR devices, protection components, MOSFETs, transistors, analog ICs, logic devices, and power-management semiconductors. ZLLS500QTA belongs to the ZLLS low-leakage Schottky barrier diode family.

FAQ

What is ZLLS500QTA used for?

ZLLS500QTA is used for low-leakage Schottky rectification, charging circuits, rail steering, reverse-polarity protection, converters, strobes, and motor-control support paths. The 40 V rating, 700 mA current class, and SOT-23 package make ZLLS500QTA useful in compact power-management boards.

What package does ZLLS500QTA use?

ZLLS500QTA uses a SOT-23 surface-mount package. The outline is compact and easy to place near power-management ICs, but designers should check pad layout, cathode orientation, thermal copper, top marking, and reflow profile when using ZLLS500QTA at higher current.

Why is ZLLS500QTA described as low leakage?

ZLLS500QTA is designed for very low reverse leakage compared with many ordinary Schottky choices. This matters in standby-sensitive, battery-powered, or high-temperature circuits where leakage can waste energy. ZLLS500QTA still requires reverse-voltage and temperature margin in the final design.

Is ZLLS500QTA suitable for automotive applications?

ZLLS500QTA is an AEC-Q101 qualified and PPAP-capable style device for automotive-oriented supply chains. That makes ZLLS500QTA useful in motor-control, body electronics, and protected power paths, while final suitability still depends on module derating, circuit stress, and manufacturing controls.

What should be checked before replacing ZLLS500QTA?

Before replacing ZLLS500QTA, check reverse voltage, forward current, forward voltage, reverse leakage, surge current, SOT-23 footprint, cathode orientation, thermal derating, AEC-Q101 need, PPAP expectation, package marking, tape-and-reel suffix, and whether the circuit specifically depends on low leakage.