F971V155MBAHT3 Equivalent & Substitute Parts

Part Overview

The F971V155MBAHT3 is a 1.5 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 35 V operation. This component is designed for surface mount applications in the 1411 (3528 Metric) package format. The part is currently active in production with automotive-grade reliability ratings and AEC-Q200 qualification. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring molded tantalum capacitors with matching electrical and mechanical specifications.

Substiute Parts

F971V155MBAHT3

KYOCERA AVXIn Stock: 847F971V155MBAHT3 Datasheet

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T491B155M035AT

KEMETIn Stock: 2836T491B155M035AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the F971V155MBAHT3 is determined by strict equivalence across the following parameters: capacitance value (1.5 µF), tolerance (±20%), rated voltage (35 V), package format (1411/3528 Metric), and physical dimensions (0.138" L x 0.110" W, 2.10mm max height). The substitute part T491B155M035AT from KEMET meets all these core electrical and mechanical requirements, enabling direct replacement in surface mount applications. Both parts maintain ROHS3 compliance and operate within compatible temperature ranges for standard industrial and automotive applications.

Parameter Comparison

Engineering Selection Recommendations

Both F971V155MBAHT3 and T491B155M035AT are active production parts with ROHS3 compliance and REACH unaffected status. The F971V155MBAHT3 carries AEC-Q200 automotive qualification and is rated for higher temperature operation (-55°C to 135°C) with automotive-grade reliability features. The T491B155M035AT operates to -55°C to 125°C and features improved moisture sensitivity (MSL 1 versus MSL 3), making it suitable for general purpose applications with less stringent environmental requirements. Selection between these parts depends on application temperature range and automotive qualification requirements. The ESR difference (4 Ohm versus 5 Ohm) is within acceptable tolerance for most circuit applications.

Frequently Asked Questions (FAQ)

Q: Can T491B155M035AT replace F971V155MBAHT3 in all applications?

A: Direct substitution is possible for applications operating within the T491B155M035AT temperature range (-55°C to 125°C). Applications requiring operation above 125°C or automotive AEC-Q200 qualification must use the F971V155MBAHT3.

Q: What is the significance of the ESR difference between these parts?

A: The F971V155MBAHT3 has 4 Ohm ESR while T491B155M035AT has 5 Ohm ESR. This 1 Ohm difference is minor and does not affect substitution suitability for standard filtering and energy storage applications.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 1411 (3528 Metric) package with identical dimensions: 0.138" L x 0.110" W (4.60mm x 2.80mm) and 0.083" (2.10mm) maximum seated height. PCB layout and assembly processes require no modification.

Q: What does MSL 3 versus MSL 1 mean for handling?

A: MSL 3 (F971V155MBAHT3) requires storage at controlled humidity with a 168-hour floor life after moisture exposure. MSL 1 (T491B155M035AT) has unlimited floor life and requires no special moisture control during storage or handling.

Q: Are both parts suitable for automotive applications?

A: The F971V155MBAHT3 carries AEC-Q200 automotive qualification. The T491B155M035AT is rated for general purpose use. Automotive applications requiring AEC-Q200 certification must specify the F971V155MBAHT3.