KEMET T491A476M006AT7280

Summary of the T491A476M006AT7280 KEMET Tantalum Capacitor Product

The KEMET T491A476M006AT7280 is an industrial-grade molded tantalum surface-mount capacitor, part of the T491 Series, engineered for compatibility with highly automated production environments. It features a capacitance of 47μF ±20% at a rated voltage of 6.3V, packaged in the popular 1206 (3216 metric) SMD footprint. Designed with manganese dioxide as the cathode material, this component offers reliable performance for filtering, decoupling, and energy storage across diverse electronics platforms. The T491 series is recognized for its solid tantalum technology and aligns with the global EIA 535BAAC standard.

Main Characteristics and Material Advantages of the T491A476M006AT7280 KEMET

The T491A476M006AT7280 KEMET capacitor leverages advanced molding techniques to deliver robust mechanical properties and high electrical performance. Key features include symmetrical, compliant terminations for enhanced solder integrity, optional gold-plated terminations for conductive epoxy processes, and a laser-marked package for clear identification in automated assembly. Standard terminations use 100% matte tin, ensuring excellent solder wetting, while halogen-free encapsulation and UL94 V-0 compliant epoxy maximize fire safety and environmental compatibility. The T491 series further extends flexibility via a broad selection of capacitance (0.1–1,000μF), voltage ratings (2.5–50V), and tolerance options (±10%, ±20%), as well as packaging suited to all standard tape-and-reel SMT placement systems.

Electrical Data and Performance Parameters of the T491A476M006AT7280 KEMET

At the heart of the T491A476M006AT7280’s appeal are its meticulously detailed electrical parameters. With a capacitance of 47μF and an ESR rating of just 3.5Ω, the device performs reliably in filtering and voltage smoothing roles. The operating temperature range spans from -55°C to +125°C, supporting industrial-grade durability with a rated lifetime of 2,000 hours at full rated temperature. Engineers can enhance application reliability using voltage derating (generally recommended for tantalum capacitors) and by adhering to ripple current and voltage guidelines—peak AC voltage must not exceed the DC rating, and the device should not be subject to continuous reverse polarity operation.

Evaluation of ripple tolerance is crucial: permissible AC ripple current and voltage depend on the ESR value and the power dissipation rating, with clear guidelines for calculation provided. KEMET’s K-SIM online simulation tool supports in-depth modeling of part performance across frequency, DC bias, and temperature ranges.

Environmental Standards Compliance and Durability of the T491A476M006AT7280 KEMET

Environmental responsibility remains a cornerstone of the T491A476M006AT7280 KEMET design. The part is RoHS3 compliant and unaffected by REACH regulations, backed by flame-retardant molding and halogen-free materials. Its moisture sensitivity level (MSL 1) grants unlimited floor life, simplifying logistics and inventory management in manufacturing. The epoxy compound passes rigorous outgassing tests required for certain aerospace and control-system applications.

Use Cases for the T491A476M006AT7280 KEMET

The T491A476M006AT7280 KEMET capacitor is purpose-built for integration into modern electronics where compact form factor and performance reliability are paramount. Common engineering use cases include power rail decoupling in DC/DC converters, noise filtering in portable consumer devices, and signal conditioning in telecommunications and industrial control units. Its low-profile package and high reliability metrics make it equally well-suited to densely populated, automated SMT boards and designs requiring long-term endurance at elevated temperatures.

Engineering and Design Factors for the T491A476M006AT7280 KEMET

Engineers selecting the T491A476M006AT7280 should note several points critical for dependable system design. Proper polarity must always be maintained—solid tantalum capacitors are intrinsically polar and are not tolerant of sustained reverse voltage. Transient reverse voltage exposure is allowed only within specific short-term and voltage limits. Mounting recommendations vary with density class: IPC-7351 provides guidance for low, moderate, and high component density PCB designs, ensuring optimal solder coverage and mechanical stability.

For assembly, the T491 series is compatible with convection, IR, vapor phase, and wave soldering processes. Preheating is advised to minimize thermal stress, and the device can safely tolerate up to three standard SMT reflow cycles. Handling guidelines stress careful storage, ideally below 40°C and 60% relative humidity, and recommend usage within three years for peak solderability. Hand soldering is permitted but should be enacted with strict process control to avoid damaging the molded case.

Packaging Details and Handling Instructions for the T491A476M006AT7280 KEMET

The T491A476M006AT7280 KEMET capacitor is supplied on tape-and-reel in accordance with EIA Standard 481, ensuring seamless integration with automated component placement platforms. Both 7" and 13" reels are available, and packaging is engineered to minimize damage during feed and placement—features include robust cover tape break force and optimal peel strength. Barcoded labeling complies with industry standards for traceability and inventory control. The molded chip’s package dimensions are 3.2mm x 1.6mm x 1.80mm (L x W x H), corresponding to the 1206 footprint used in high-density SMT layouts.

Alternative and Substitute Models for the T491A476M006AT7280 KEMET

Engineers considering the T491A476M006AT7280 KEMET may evaluate equivalent parts within the broader T491 Series or alternative offerings from competing manufacturers, ensuring critical parameters—capacitance, voltage rating, ESR, size, and terminations—meet specification. Within KEMET’s portfolio, alternative ratings for voltage, tolerance, and ESR in the same package can substitute at KEMET’s discretion, often providing better-than-series characteristics for demanding applications. Equivalent SMD tantalum capacitors from other brands should be carefully compared for compliance with EIA 535BAAC, RoHS status, and matching mechanical outlines, especially when cross-qualifying for automated production lines or legacy board designs.

Conclusion

The KEMET T491A476M006AT7280 stands out as a robust, reliable, and highly versatile molded tantalum SMD capacitor built for automated, high-reliability electronic assemblies. It offers a harmonious balance of electrical performance, environmental compliance, and manufacturing compatibility, supported by clear handling and design guidelines. For engineers and procurement professionals, the T491A476M006AT7280 represents a strong candidate for modern filtering and decoupling roles, with both direct performance advantages and well-documented pathways to equivalent alternatives when required.