KEMET T491B686M010AH Molded Tantalum Capacitor 68µF 10V - Equivalent & Substitute Parts

Part Overview

The KEMET T491B686M010AH is a 68 µF molded tantalum capacitor rated at 10 V with ±20% tolerance, housed in a 1411 (3528 Metric) surface mount package. This component is classified as Active product status and is designed for general purpose applications requiring stable capacitance in compact form factors. The part operates across a temperature range of -55°C to 125°C with a rated lifetime of 2000 hours at 125°C.

Equivalent and substitute parts are identified when designs require alternative electrical characteristics, improved compliance certifications, or enhanced performance specifications while maintaining compatibility with the original package footprint and core electrical parameters.

Substiute Parts

T491B686M010AH

KEMETIn Stock: 904T491B686M010AH Datasheet

Current PartRFQ

T495B686K010ATE750

KEMETIn Stock: 1807T495B686K010ATE750 Datasheet

Parametric EquivalentRFQ

T495B686K010ATE900

KEMETIn Stock: 7066T495B686K010ATE900 Datasheet

Parametric EquivalentRFQ

T495B686M010ATE900

KEMETIn Stock: 1487T495B686M010ATE900 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491B686M010AH is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance value: 68 µF (exact match required)
• Voltage rating: 10 V (exact match required)
• Package / Case: 1411 (3528 Metric) (exact match required)
• Mounting type: Surface Mount (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)

Secondary Substitution Parameters:

• Tolerance: ±20% or tighter (±10%)
• ESR (Equivalent Series Resistance): 1 Ohm or lower
• Lifetime @ 125°C: 2000 Hrs (exact match required)

The substitute parts identified below meet all primary criteria and maintain compatibility with the original design specifications. Variations in tolerance and ESR represent improved or equivalent performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

T495B686K010ATE750 (750 mOhm @ 100kHz)

This substitute part offers improved tolerance specification (±10% versus ±20%) and reduced ESR (750 mOhm versus 1 Ohm). The T495B686K010ATE750 achieves ROHS3 compliance, addressing regulatory requirements that may be necessary for new designs or updated product lines. All mechanical and thermal parameters remain identical to the main part. This option is suitable for applications where tighter capacitance tolerance and lower impedance characteristics are beneficial.

T495B686K010ATE900 (900 mOhm @ 100kHz)

This substitute part maintains ±10% tolerance with slightly elevated ESR (900 mOhm versus 1 Ohm). The T495B686K010ATE900 achieves ROHS3 compliance and provides the highest inventory availability among substitute options. This part is suitable for applications where improved tolerance is required without the lowest ESR specification.

T495B686M010ATE900 (900 mOhm @ 100kHz)

This substitute part matches the original ±20% tolerance specification while providing reduced ESR (900 mOhm versus 1 Ohm). The T495B686M010ATE900 achieves ROHS3 compliance and maintains identical tolerance characteristics to the main part. This option is suitable for direct replacement in designs where regulatory compliance upgrade is the primary objective.

All three substitute parts maintain identical package footprint, operating temperature range, and lifetime specifications. Selection between substitutes depends on tolerance requirements, ESR performance needs, and regulatory compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can T495B686K010ATE750 be used as a direct replacement for T491B686M010AH?

A: Yes. Both parts share identical capacitance (68 µF), voltage rating (10 V), package (1411 / 3528 Metric), operating temperature range (-55°C to 125°C), and lifetime specification (2000 Hrs @ 125°C). The T495B686K010ATE750 provides improved tolerance (±10% versus ±20%) and lower ESR (750 mOhm versus 1 Ohm). The primary difference is ROHS3 compliance status.

Q: What is the difference between T495B686K010ATE750 and T495B686K010ATE900?

A: Both parts share identical capacitance, voltage, tolerance (±10%), and package specifications. The primary difference is ESR: T495B686K010ATE750 specifies 750 mOhm @ 100kHz, while T495B686K010ATE900 specifies 900 mOhm @ 100kHz. Selection depends on circuit impedance requirements.

Q: Why does T495B686M010ATE900 have ±20% tolerance like the main part?

A: The T495B686M010ATE900 is designated with the "M" tolerance code (±20%) to provide a direct tolerance match with the original T491B686M010AH. This part is suitable for designs where tolerance specification must remain unchanged while upgrading to improved ESR performance and ROHS3 compliance.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All substitute parts identified are supplied in Tape & Reel (TR) packaging, matching the original part's packaging format.

Q: What is the significance of the 1411 (3528 Metric) package designation?

A: The 1411 package code corresponds to 3528 Metric dimensions (3.5mm x 2.8mm footprint). All substitute parts maintain this identical package specification, ensuring PCB layout compatibility without design modification.

Q: Do all substitute parts operate across the same temperature range?

A: Yes. All substitute parts operate across -55°C to 125°C with 2000 hours lifetime rating at 125°C, matching the original part's thermal specifications.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. All parts in this comparison share this specification, requiring no special moisture control during storage or handling.