F971D105MAA Equivalent & Substitute Parts

Part Overview

The F971D105MAA is a 1 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 20 V operation in a 1206 (3216 Metric) surface mount package. This component is designed for automotive and high-reliability applications, with AEC-Q200 certification and ROHS3 compliance. The part is currently active in production with 2478 units in stock.

Equivalent and substitute parts are identified when design requirements allow flexibility in tolerance, ESR characteristics, or manufacturer selection while maintaining core electrical and mechanical compatibility.

Substiute Parts

F971D105MAA

KYOCERA AVXIn Stock: 2520F971D105MAA Datasheet

Current PartRFQ

F971D105KAA

KYOCERA AVXIn Stock: 2958F971D105KAA Datasheet

Parametric EquivalentRFQ

T491A105M020AT

KEMETIn Stock: 4885T491A105M020AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F971D105MAA is determined by the following core parameters:

• Capacitance Value: Must be 1 µF (exact match required)
• Voltage Rating: Must be 20 V or higher (equal or greater)
• Package / Case: Must be 1206 (3216 Metric) for PCB compatibility
• Mounting Type: Must be Surface Mount
• Type: Must be Molded Tantalum
• Operating Temperature Range: Must support -55°C ~ 125°C minimum
• RoHS Compliance: Must be ROHS3 Compliant

Tolerance and ESR variations are permitted within the electrical design margins of the application. Differences in moisture sensitivity level (MSL) and lifetime ratings do not disqualify substitution but must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

F971D105KAA (KYOCERA AVX): This substitute maintains identical electrical and mechanical specifications to the main part, with the exception of tighter tolerance (±10% versus ±20%). Both parts carry AEC-Q200 automotive certification and ROHS3 compliance. Selection of this substitute is appropriate when tighter capacitance tolerance is required or when maintaining a single manufacturer source is preferred.

T491A105M020AT (KEMET): This substitute meets all core electrical requirements with matching 1 µF capacitance, 20 V rating, and ±20% tolerance. The ESR is 9 Ohm compared to 7.5 Ohm in the main part. The seated height is 0.071" (1.80mm) versus 0.047" (1.20mm), requiring verification of PCB clearance constraints. MSL rating is 1 (Unlimited) versus 3 (168 Hours), providing superior moisture handling. This substitute is suitable for applications where cross-manufacturer sourcing is acceptable and height clearance permits.

Frequently Asked Questions (FAQ)

Q: Can F971D105KAA be used as a direct replacement for F971D105MAA?

A: Yes. Both parts are 1 µF, 20 V, 1206 package molded tantalum capacitors with identical physical dimensions and ESR. The F971D105KAA offers tighter tolerance (±10%) and maintains AEC-Q200 and ROHS3 compliance.

Q: What is the primary difference between F971D105MAA and T491A105M020AT?

A: The main differences are manufacturer (KYOCERA AVX versus KEMET), ESR (7.5 Ohm versus 9 Ohm), seated height (0.047" versus 0.071"), and MSL rating (3 versus 1). Electrical performance is equivalent at the rated 1 µF, 20 V specification.

Q: Does the height difference of T491A105M020AT affect PCB compatibility?

A: The T491A105M020AT has a maximum seated height of 0.071" (1.80mm) compared to 0.047" (1.20mm) for the main part. PCB layout clearance must be verified before substitution to ensure no interference with adjacent components or conformal coating processes.

Q: Are all three parts suitable for automotive applications?

A: F971D105MAA and F971D105KAA both carry AEC-Q200 certification for automotive use. T491A105M020AT is rated for general purpose applications and does not carry AEC-Q200 certification. Automotive application requirements must be confirmed before selecting T491A105M020AT.

Q: What does MSL rating indicate for these capacitors?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to moisture before soldering. F971D105MAA and F971D105KAA are MSL 3 (168 hours maximum). T491A105M020AT is MSL 1 (unlimited exposure). Higher MSL ratings provide greater handling flexibility in manufacturing environments.