T491V157M006AT Equivalent & Substitute Parts

Part Overview

The T491V157M006AT is a 150 µF molded tantalum capacitor manufactured by KEMET, rated for 6.3 V operation in a 2917 (7343 Metric) surface mount package. This component is classified as Active product status and is designed for general purpose applications requiring stable capacitance and low equivalent series resistance in compact form factors.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the critical parameters: capacitance value, voltage rating, tolerance, package case, mounting type, and operating temperature range. Alternative sources and variants may be required due to inventory availability, manufacturing lead times, or specific application requirements for reduced ESR performance.

Substiute Parts

T491V157M006AT

KEMETIn Stock: 1125T491V157M006AT Datasheet

Current PartRFQ

T491D157M006AT

KEMETIn Stock: 40230T491D157M006AT Datasheet

DirectRFQ

TPSD157M006R0125

KYOCERA AVXIn Stock: 2675TPSD157M006R0125 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T491V157M006AT are qualified based on strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance: 150 µF (exact match)
• Voltage Rating: 6.3 V (exact match)
• Tolerance: ±20% (exact match)
• Operating Temperature: -55°C to 125°C (exact match or better)

Mechanical Equivalence Requirements:

• Package / Case: 2917 (7343 Metric) (exact match)
• Mounting Type: Surface Mount (exact match)
• Type: Molded Tantalum (exact match)

Compliance Requirements:

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts may vary in ESR (Equivalent Series Resistance) and physical height while maintaining all critical electrical and mechanical parameters. Variations in ESR do not disqualify a part from substitution when all other parameters remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

T491D157M006AT (KEMET - Direct Substitute)

The T491D157M006AT is a direct electrical equivalent to the T491V157M006AT, maintaining identical capacitance, voltage rating, tolerance, operating temperature range, and ESR specifications. Both parts are KEMET products within the T491 series and share the same 2917 package footprint. The primary difference is the seated height maximum of 0.110" (2.80mm) compared to 0.079" (2.00mm) on the main part. This substitute is suitable for applications where the increased height does not present mechanical constraints. Product status is Active with ROHS3 compliance and unlimited moisture sensitivity rating.

TPSD157M006R0125 (KYOCERA AVX - Similar Substitute)

The TPSD157M006R0125 provides equivalent electrical performance in capacitance, voltage, tolerance, and operating temperature range. This part is manufactured by KYOCERA AVX and features significantly reduced ESR at 125 mOhm compared to 700 mOhm on the main part. The 2917 package footprint and surface mount configuration remain identical. The seated height maximum is 0.122" (3.10mm). This substitute is applicable in applications where lower ESR performance is beneficial or required. Product status is Active with ROHS3 compliance and unlimited moisture sensitivity rating.

Both substitute parts maintain full compliance with RoHS3 and REACH requirements. Selection between substitutes depends on physical height constraints within the application and whether reduced ESR performance is advantageous.

Frequently Asked Questions (FAQ)

Q: Can T491D157M006AT be used as a direct replacement for T491V157M006AT?

A: Yes. The T491D157M006AT maintains identical electrical specifications including 150 µF capacitance, 6.3 V rating, ±20% tolerance, 700 mOhm ESR, and -55°C to 125°C operating range. Both parts use the 2917 (7343 Metric) surface mount package. The primary difference is seated height: 0.110" (2.80mm) versus 0.079" (2.00mm). Verify that the increased height does not conflict with board layout or component clearance requirements.

Q: What is the difference between TPSD157M006R0125 and the main part?

A: The TPSD157M006R0125 matches all critical electrical parameters: 150 µF, 6.3 V, ±20% tolerance, and -55°C to 125°C operating range. The key difference is ESR: 125 mOhm versus 700 mOhm on the main part. This lower ESR may provide improved performance in applications sensitive to impedance characteristics. The seated height is 0.122" (3.10mm). Both parts are ROHS3 compliant with unlimited moisture sensitivity.

Q: Are all substitute parts in the same 2917 package?

A: Yes. All three parts—T491V157M006AT, T491D157M006AT, and TPSD157M006R0125—use the 2917 (7343 Metric) surface mount package with identical footprint dimensions of 0.287" L x 0.169" W (7.30mm x 4.30mm). Seated heights vary: 0.079" (2.00mm), 0.110" (2.80mm), and 0.122" (3.10mm) respectively.

Q: Do all substitute parts meet RoHS and REACH requirements?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (Unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Q: Which substitute should be selected for space-constrained applications?

A: The T491V157M006AT has the lowest seated height at 0.079" (2.00mm). If this part is unavailable, the T491D157M006AT at 0.110" (2.80mm) is the next option. The TPSD157M006R0125 at 0.122" (3.10mm) is suitable only if height constraints permit.

Q: Can TPSD157M006R0125 be used when lower ESR is required?

A: Yes. The TPSD157M006R0125 provides 125 mOhm ESR compared to 700 mOhm on both KEMET parts. This lower ESR is suitable for applications requiring reduced impedance. All other electrical and mechanical parameters remain equivalent.