KEMET T494A104M035AT

Product Summary KEMET T494A104M035AT Tantalum Capacitor

The KEMET T494A104M035AT represents a low ESR, solid tantalum surface mount capacitor tailored for demanding automated assembly environments. Featuring a capacitance of 0.1 μF with 20% tolerance and rated at 35V, the device comes in an industry-standard 1206 (3216 metric) package. As a member of KEMET's T494 industrial-grade MnO₂ series, it is designed to meet modern board-mounted requirements, emphasizing high reliability, consistent quality, and compatibility with advanced soldering processes. The product meets EIA standard 535BAAC and is classified as Moisture Sensitivity Level 1 per J-STD-020, granting unlimited floor life—a core consideration for long-term storage and logistics.

Key Attributes and Advantages of the T494A104M035AT Series

The T494A104M035AT capacitor introduces several enhancements over earlier KEMET series, notably lower ESR compared to the popular T491 series. The range provides symmetrical, compliant terminations, facilitating robust mechanical and electrical connections in surface mount processes. Optional gold-plated terminations are available, supporting conductive epoxy attachment. The use of halogen-free epoxy, extended voltage ratings up to 50 VDC, and an operating temperature range from -55°C to +125°C supports deployment in harsh industrial environments. Tape-and-reel packaging in accordance with EIA 481 standards ensures compatibility with automatic pick-and-place and reflow soldering systems, optimizing throughput for high-volume production.

In engineering selection, particular attention should be paid to the tolerance (±10% or ±20%), voltage rating, and ESR, as these define the component’s suitability for specific filtering or decoupling tasks. The series’ laser-marked case streamlines identification and reduces placement errors during automated assembly.

Comprehensive Electrical and Mechanical Specifications of the T494A104M035AT

The T494A104M035AT features key electrical characteristics vital for circuit designers. Its low ESR profile is essential for applications affected by ripple current and voltage drop; the ESR and capacitance both vary with frequency, and these dependencies can be simulated using KEMET’s K-SIM modeling tool. The device’s physical dimensions adhere to the 1206 standard, ensuring cross-compatibility with widely adopted PCB layouts and industry-standard land patterns. KEMET offers termination variants, including 100% matte tin, gold-plated, Sn/Pb solder, and non-magnetic finishes, accommodating various assembly technologies and reliability preferences.

Ripple current and voltage must be managed relative to ESR and the device’s maximum power dissipation. Engineering calculations should confirm that the combined DC bias and AC ripple do not exceed the capacitor’s voltage rating, with careful attention to reverse voltage allowances. Power dissipation ratings must be adjusted for operating temperature through referenced compensation multipliers, ensuring reliability under real-world circuit stresses.

Use Cases for the T494A104M035AT Series

The T494A104M035AT series finds broad use in decoupling and power line filtering across DC/DC converters, portable electronics, telecommunications, and automotive control units. Its low profile and robust terminations make it suitable for densely populated, multilayered boards. The RoHS compliance and halogen-free composition support environmentally sensitive designs and international regulatory requirements.

Designers seeking stable performance in temperature-varied or high-frequency environments benefit from the device’s rugged construction and consistent quality. The extended voltage and capacitance ranges allow a single family to serve multiple circuit nodes and voltage rails, streamlining BOM management.

Environmental Standards and Reliability Aspects of the T494A104M035AT

Eco-conscious engineering teams can rely on the T494A104M035AT’s RoHS (6/6) compliance when employing 100% Sn solder, gold-plated, or non-magnetic terminations. The device is also halogen-free, with molded epoxy compliant to UL94 V-0 (flammability) and ASTM E 595 (outgassing). Such properties ensure safe integration in products subject to international environmental standards.

For reliability, the capacitor is surge current tested across selected case sizes, and its solid MnO₂ tantalum construction has a proven track record in mission-critical electronics. Tantalum’s inherent advantages—high volumetric efficiency and stable electrical characteristics—are complemented by KEMET’s manufacturing controls and the series’ MSL 1 rating, minimizing risk during storage and processing.

Soldering, Handling, and Storage Recommendations for the T494A104M035AT Series

KEMET’s T494A104M035AT surface mount capacitors are engineered for compatibility with wave (single or dual), convection, infrared (IR), and vapor phase reflow soldering. Preheating procedures are advised to mitigate thermal stress during assembly. The device safely withstands up to three reflow passes under IPC/J-STD-020D conditions; its packaging and case design enable secure handling with automatic placement equipment, though care should be taken with hand soldering to avoid case damage and marking loss.

Optimal storage conditions for these capacitors are below 40°C and 60% relative humidity. Excessive temperature, moisture, or exposure to corrosive atmospheres can degrade both device solderability and packaging integrity. Component stock is best consumed within three years of receipt to guarantee performance.

Tape and Reel Packaging Requirements for the T494A104M035AT

The T494A104M035AT is tape-and-reel packaged per EIA 481 standards, supporting modern automated assembly lines. Devices are presented in 8 mm or 12 mm plastic tape on 7" or 13" reels, allowing seamless integration with tape-fed pick-and-place equipment. Packaging specifications address cover tape break force (minimum 1.0 kg) and peel strength, as well as dimensional controls for carrier tape cavities, rotation, and lateral movement, to assure consistent part orientation and retention.

Bar code labeling adheres to EIA standards (556/624), simplifying part traceability and inventory management during production. Packaging further supports engineers’ objectives for SMT process yield and component security from receipt to board assembly.

Alternative or Substitute Models for the T494A104M035AT

While the T494A104M035AT advances upon the T491 series with lower ESR, engineers evaluating alternatives should examine devices within KEMET’s broader T494 family to match or surpass the original’s capacitance, voltage rating, and ESR profile. Selection within this series allows for voltage and tolerance substitutions, typically marked on the device to signal higher voltage or better ESR. Equivalent components must be assessed for termination finish compatibility, physical dimensions, and environmental compliance to ensure seamless drop-in replacement and full adherence to project reliability and regulatory needs.

Competitors’ MnO₂-based surface mount tantalum capacitors with matching mechanical and electrical ratings may also serve as substitutes, but careful simulation of ESR vs. frequency and verification of soldering and storage requirements remain paramount for maintaining specification compliance.

Conclusion

: Engineering Perspective on Selecting the T494A104M035AT

For product selection engineers and procurement professionals, the KEMET T494A104M035AT offers a compelling solution for modern decentralized, high-reliability electronic assemblies. Its blend of low ESR, robust environmental compliance, and versatility across attachment methods and applications is matched by thoughtful packaging and handling standards, culminating in consistent, high-quality integration into today’s automated manufacturing environments. Thorough evaluation of termination options, power dissipation management, and rigorous adherence to storage and assembly guidelines will ensure that the T494A104M035AT fulfills performance expectations and supports long-term reliability goals.