Equivalent & Substitute Parts for T491C686M016AT

Part Overview

The T491C686M016AT is a 68 µF molded tantalum capacitor manufactured by KEMET, rated for 16 V operation in a 2312 (6032 Metric) surface mount package. This component is classified as Active product status and is designed for general purpose applications requiring stable capacitance performance across industrial temperature ranges. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, packaging format preferences, or specific ESR (Equivalent Series Resistance) requirements for circuit performance optimization.

Substiute Parts

T491C686M016AT

KEMETIn Stock: 1145T491C686M016AT Datasheet

Current PartRFQ

T491C686K016AT

KEMETIn Stock: 1618T491C686K016AT Datasheet

UpgradeRFQ

T495C686M016ATE250

KEMETIn Stock: 1510T495C686M016ATE250 Datasheet

SimilarRFQ

TPSC686M016R0200

KYOCERA AVXIn Stock: 1731TPSC686M016R0200 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T491C686M016AT are classified into two categories based on allowed parameter variations:

Upgrade Substitute (Tighter Tolerance): T491C686K016AT represents an upgrade path where capacitance tolerance is reduced from ±20% to ±10%, while maintaining identical electrical specifications (68 µF, 16 V, 1.2 Ohm ESR) and mechanical compatibility (2312 package, surface mount). This substitution is valid when circuit design requires improved capacitance accuracy without changing voltage rating, ESR, or thermal performance.

Similar Substitutes (Alternative Manufacturers / ESR Variations): T495C686M016ATE250 and TPSC686M016R0200 maintain core electrical parameters (68 µF, 16 V, ±20% tolerance) and identical package dimensions but differ in ESR specifications and manufacturer origin. These substitutions are valid when ESR performance requirements differ from the original 1.2 Ohm specification, or when alternative manufacturer sourcing is required for supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

T491C686K016AT Selection Criteria: Select this KEMET upgrade substitute when circuit design specifications require capacitance tolerance of ±10% or tighter. This part maintains all electrical and thermal characteristics of the original T491C686M016AT while providing improved accuracy. Both parts are Active status with ROHS3 compliance and MSL 1 rating, ensuring equivalent reliability and environmental compliance.

T495C686M016ATE250 Selection Criteria: Select this KEMET alternative when circuit performance requires reduced ESR of 250 mOhm compared to the original 1.2 Ohm specification. This substitution is valid for applications where lower impedance at operating frequencies improves voltage regulation or reduces thermal dissipation. The part maintains identical capacitance, voltage rating, tolerance, and package dimensions. Active product status and ROHS3 compliance are maintained.

TPSC686M016R0200 Selection Criteria: Select this KYOCERA AVX alternative when supply chain sourcing from alternative manufacturers is required or when ESR specification of 200 mOhm is preferred. This part provides the lowest ESR among all substitutes while maintaining 68 µF capacitance, 16 V rating, ±20% tolerance, and 2312 package compatibility. Active product status and ROHS3 compliance are maintained. All parts share identical physical dimensions and surface mount compatibility.

Frequently Asked Questions (FAQ)

Q: Can T491C686K016AT be used as a direct replacement for T491C686M016AT?

A: Yes. T491C686K016AT is a direct substitute with improved capacitance tolerance (±10% versus ±20%). All electrical parameters including 68 µF capacitance, 16 V rating, 1.2 Ohm ESR, and thermal performance are identical. Physical dimensions and surface mount package (2312) are unchanged. The tighter tolerance makes this an upgrade option for circuits requiring higher capacitance accuracy.

Q: What is the difference between T495C686M016ATE250 and the original T491C686M016AT?

A: Both parts share identical capacitance (68 µF), voltage rating (16 V), tolerance (±20%), and package dimensions (2312). The primary difference is ESR: T495C686M016ATE250 has 250 mOhm ESR compared to 1.2 Ohm in the original. Lower ESR reduces impedance at high frequencies and decreases heat generation. Both are KEMET products with Active status and ROHS3 compliance.

Q: Is TPSC686M016R0200 compatible with the original circuit design?

A: Yes. TPSC686M016R0200 maintains all critical electrical specifications: 68 µF capacitance, 16 V rating, ±20% tolerance, and identical 2312 package dimensions. The manufacturer is KYOCERA AVX instead of KEMET. ESR is 200 mOhm, lower than the original 1.2 Ohm. This substitution is valid for applications where alternative manufacturer sourcing or reduced ESR performance is acceptable.

Q: Do all substitute parts have the same physical footprint?

A: Yes. All substitute parts use the 2312 (6032 Metric) package with identical dimensions: 0.236" L x 0.126" W (6.00mm x 3.20mm) and maximum seated height of 0.110" (2.80mm). All are surface mount components with identical PCB land pattern compatibility.

Q: What is the significance of ESR differences among these parts?

A: ESR (Equivalent Series Resistance) affects impedance at operating frequencies and thermal performance. The original T491C686M016AT has 1.2 Ohm ESR. T495C686M016ATE250 has 250 mOhm ESR, and TPSC686M016R0200 has 200 mOhm ESR. Lower ESR reduces voltage ripple and heat dissipation in high-frequency applications. Selection depends on circuit performance requirements at operating frequencies.

Q: Are all parts RoHS compliant?

A: Yes. All four parts (T491C686M016AT, T491C686K016AT, T495C686M016ATE250, and TPSC686M016R0200) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent environmental compliance and reliability for industrial applications.

Q: What packaging formats are available?

A: T491C686M016AT and T495C686M016ATE250 are supplied in Tape & Reel (TR) format. T491C686K016AT is available in Cut Tape (CT) and Digi-Reel® format. TPSC686M016R0200 is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and volume handling.