Equivalent & Substitute Parts for T86D156M025ESSL

Part Overview

The T86D156M025ESSL is a 15 µF molded tantalum capacitor rated at 25 V with ±20% tolerance, manufactured by Vishay Sprague as part of the TANTAMOUNT™ T86 series. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement.

Key Parameters

Parameter	Value
Capacitance	15 µF
Voltage Rating	25 V
Tolerance	±20%
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
ESR (Equivalent Series Resistance)	400 mOhm
Operating Temperature Range	-55°C to 125°C
Type	Molded
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the T86D156M025ESSL is determined by the following criteria:

Mandatory Compatibility Parameters:

Capacitance: 15 µF (exact match required)
Package / Case: 2917 (7343 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)

Allowable Variation Parameters:

Voltage Rating: Substitutes rated at 35 V are acceptable (higher voltage rating provides design margin)
Tolerance: ±20% or ±10% are acceptable (tighter tolerance is acceptable)
Type: Conformal Coated substitutes are acceptable (enhanced reliability variant)
ESR: 410 mOhm is acceptable (marginal increase from 400 mOhm)

All substitute parts listed are from the Vishay Sprague TANTAMOUNT™ T95 series, which represents the active production equivalent to the obsolete T86 series.

Parameter Comparison

Part Number	Capacitance	Voltage Rating	Tolerance	Type	ESR	Package	Product Status	Inventory
T86D156M025ESSL	15 µF	25 V	±20%	Molded	400 mOhm	2917 (7343 Metric)	Obsolete	722 Pcs
T95D156M035EZAS	15 µF	35 V	±20%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	1069 Pcs
T95D156M035LSAS	15 µF	35 V	±20%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	887 Pcs
T95D156M035LSSS	15 µF	35 V	±20%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	727 Pcs
T95D156K035LSAS	15 µF	35 V	±10%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	1137 Pcs
T95D156K035LSSS	15 µF	35 V	±10%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	1108 Pcs
T95D156K035LZAS	15 µF	35 V	±10%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	977 Pcs
T95D156K035LZSS	15 µF	35 V	±10%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	975 Pcs
T95D156M035ESAS	15 µF	35 V	±20%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	904 Pcs
T95D156M035ESSS	15 µF	35 V	±20%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	1045 Pcs
T95D156M035LZAS	15 µF	35 V	±20%	Conformal Coated	410 mOhm	2917 (7343 Metric)	Active	785 Pcs

Engineering Selection Recommendations

Direct Substitutes (Same Tolerance, Higher Voltage Rating): T95D156M035EZAS, T95D156M035LSAS, T95D156M035LSSS, T95D156M035ESAS, T95D156M035ESSS, and T95D156M035LZAS are direct functional equivalents with ±20% tolerance matching the original specification. The 35 V rating provides increased design margin over the original 25 V rating. All are active production parts with conformal coating for enhanced reliability.

Upgraded Substitutes (Tighter Tolerance, Higher Voltage Rating): T95D156K035LSAS, T95D156K035LSSS, and T95D156K035LZAS offer ±10% tolerance with 35 V rating. These parts provide improved capacitance accuracy and are suitable for applications requiring tighter tolerance control.

Product Status Consideration: All substitute parts are classified as Active, ensuring long-term availability and supply chain continuity. The original T86D156M025ESSL is obsolete and should be replaced in new designs.

Compliance and Certifications: All parts carry identical COTS ratings, ECCN EAR99 classification, and HTSUS code 8532.21.0050. Moisture Sensitivity Level (MSL) for substitutes is 2A (4 Weeks), compared to MSL 1 for the original part.

Frequently Asked Questions (FAQ)

Q: Can T95 series parts directly replace T86 series parts? A: Yes, within the specified electrical and mechanical parameters. The T95 series represents the active production equivalent to the obsolete T86 series. All substitute parts maintain identical capacitance, package dimensions, and mounting type.

Q: What is the significance of the 35 V rating on substitute parts versus the original 25 V? A: The higher voltage rating provides design margin and does not affect circuit compatibility. A 35 V rated capacitor operates safely in a 25 V application. This is a standard substitution practice in capacitor selection.

Q: Are conformal coated substitutes compatible with molded original parts? A: Yes. Conformal coating is an enhancement that provides additional environmental protection. Functionally and mechanically, conformal coated parts are compatible with molded variants in the same package.

Q: What does the tolerance difference between ±20% and ±10% mean for substitution? A: ±10% tolerance parts are acceptable substitutes for ±20% tolerance specifications. Tighter tolerance provides improved capacitance accuracy. If the original design requires ±20% tolerance, ±10% parts exceed the requirement.

Q: Are there differences in the part number suffixes (LSAS, LSSS, EZAS, ESAS, LZAS, LZSS)? A: Suffixes indicate packaging and lead configuration variants. All listed parts are available in Tape & Reel (TR) packaging suitable for automated assembly. Selection among these variants depends on procurement and assembly process requirements.

Q: What is the MSL 2A rating on substitute parts? A: MSL 2A indicates Moisture Sensitivity Level 2A with a floor life of 4 weeks. This requires controlled storage conditions. The original part has MSL 1 (unlimited floor life). Proper moisture control during storage and handling is required for substitute parts.

Q: Can I use multiple substitute parts interchangeably in the same design? A: Yes. All listed substitute parts meet the mandatory compatibility parameters (15 µF, 35 V, ±20% or ±10%, 2917 package, surface mount). Selection can be based on availability, packaging preference, or tolerance requirement.

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