KEMET T491D476M010AT

Product Summary KEMET T491D476M010AT Series

The KEMET T491D476M010AT is a representative member of the T491 Industrial Grade standard tantalum surface mount capacitor family. Designed to meet the rigorous demands of today’s automated production lines for surface mount technology (SMT), the T491D476M010AT provides a 47 μF nominal capacitance with a voltage rating of 10 V, and a capacitance tolerance of ±20%. Housed in a 2917 (7343 metric) molded case, this component features an ESR of 800 mΩ and is built around manganese dioxide (MnO₂) technology.

As a solid tantalum capacitor, the KEMET T491D476M010AT is optimized for use in decoupling and filtering roles in DC/DC converters, portable electronics, telecommunications equipment, and control units. It is constructed to fully satisfy or exceed EIA standard 535BAAC, classified as moisture sensitivity level (MSL) 1 under J-STD-020, enabling unlimited floor life and simplified logistics in modern assembly environments.

Main Attributes and Performance Overview of the KEMET T491D476M010AT Series

The KEMET T491D476M010AT series incorporates a range of features that make it a preferred choice for reliable SMT designs. Among its notable attributes are:

Compliance with industry standards: Meets or exceeds EIA 535BAAC, ensuring broad acceptance across global applications and consortia.

Packaging: Delivered in tape & reel format per EIA 481, supporting all tape-fed automatic placement systems.

Robust termination options: Standard symmetrical, compliant terminations are available in 100% matte tin, with gold-plated or SnPb finishes as alternatives, optimizing solderability and system compatibility.

Marking and identification: Laser-marked cases for clear, durable identification and seamless inventory tracking.

Quality assurance: 100% surge current tested in key case sizes, ensuring long-term reliability under demanding circuit conditions.

Halogen-free and RoHS compliant: Built with halogen-free epoxy and lead-free options to meet evolving environmental requirements.

Capacitance and voltage variety: Available across a broad capacitance range (0.1 μF to 1,000 μF) and voltage spectrum (2.5 V to 50 VDC), with extended values for tailored applications.

Operating temperature: Rated for -55°C to +125°C, suitable for industrial and demanding environments.

Electrical Specifications and Application Details for the KEMET T491D476M010AT Series

From an electrical performance standpoint, the T491D476M010AT offers stable capacitance and ESR characteristics across frequency and temperature, vital for consistent filtering and decoupling performance in power and signal paths. The large capacitance in a compact SMT package is especially beneficial in space-constrained designs like handheld or modular equipment.

Application engineering involves consideration of ripple voltage and ripple current maximums, dictated by both power dissipation capability and ESR. The device must not exceed its combined AC and DC voltage ratings, and any reverse-voltage condition should only be transient and carefully evaluated based on manufacturer guidance.

Engineers must also heed appropriate voltage derating, typically operating the device at 50–70% of its rated voltage for enhanced reliability, especially in environments with significant transients or elevated temperatures.

Mounting Guidelines, Handling, and Processing Notes for the KEMET T491D476M010AT Series

The KEMET T491D476M010AT is engineered for compatibility with prevalent SMT soldering processes — including wave (single or dual), convection, IR, and vapor phase reflow soldering. For reliable assembly, preheating is recommended to mitigate thermal stress, and up to three reflow passes at recommended profiles are permissible.

Although these capacitors are robust, hand soldering requires caution to avoid direct contact with the molded case and prevent thermal/mechanical damage. Mass production environments benefit from the proven resilience of the T491D476M010AT to standard reflow cycles, easing integration into high-speed automated lines. The device is also designed with appropriate case geometry, facilitating consistent pickup and placement during automation.

Environmental Standards Adherence and Storage Recommendations for the KEMET T491D476M010AT Series

Compliance with global environmental regulations is a cornerstone of the T491D476M010AT, verified as RoHS compliant when specified with appropriate terminations and constructed with halogen-free, UL94 V-0 certified epoxy. Outgassing performance is validated per ASTM E 595.

For optimal solderability and product life, storage is recommended below 40°C and 60% relative humidity, with minimized temperature fluctuations to prevent condensation. This ensures long-term reliability and readiness for rapid deployment into manufacturing with uninterrupted solder performance.

Packaging Details and Suitability for Automated Assembly with the KEMET T491D476M010AT Series

KEMET’s T491D476M010AT is supplied in industry-standard 8 or 12 mm embossed carrier tape, offered on readily compatible 7" or 13" reels, as defined by EIA Standard 481. The packaging guarantees secure retention and accurate component presentation to pick-and-place feeders.

Additional features such as strict control of tape cover break force and peel strength, as well as robust barcode labeling, further streamline automated assembly and traceability, supporting Just-In-Time production environments and logistics planning.

Alternative or Replacement Options for the KEMET T491D476M010AT Series

When considering substitutions or equivalent models for the KEMET T491D476M010AT, engineers should focus on several key criteria: capacitance value (47 μF), voltage rating (10 V), ESR profile (800 mΩ typical), case size (2917/7343), and the qualification to equivalent industry standards (such as EIA 535BAAC).

KEMET offers flexibility in certain specifications within the same case size, potentially providing tighter tolerances or higher voltage options. For cross-manufacturer comparisons, it is advisable to match the termination finish and environmental compliance claims. Devices from other leading manufacturers with the same value, voltage, MSL rating, and process compatibility—such as the AVX TAJD476M010RNJ or Vishay 293D476X9010C2TE3—may be cross-checked via the detailed electrical and mechanical parameters for robust drop-in replacement or dual-sourcing strategies.

Conclusion

The KEMET T491D476M010AT series balances high performance, reliability, and robust compliance with industry and environmental standards in a compact SMT form factor. Its combination of surge-tested, MnO₂ technology and broad process compatibility makes it an enduring solution for demanding applications in both new designs and as a trusted replacement in legacy hardware. By understanding its electrical profile, handling requirements, and equivalent alternatives, engineers and procurement professionals can confidently deploy the T491D476M010AT in a diverse range of electronic systems.