F971A335MAA Equivalent & Substitute Parts

Part Overview

The F971A335MAA is a 3.3 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 10 V operation in a 1206 (3216 Metric) surface mount package. This component is designed for automotive and high-reliability applications with AEC-Q200 qualification. The part is currently in active production status with 681 units available in inventory.

Equivalent and substitute parts are identified when component availability is limited, lead times are extended, or design flexibility permits tolerance or performance parameter variations within acceptable engineering margins.

Key Parameters

Parameter	Value
Capacitance	3.3 µF
Voltage Rating	10 V
Tolerance	±20%
Package / Case	1206 (3216 Metric)
Type	Molded Tantalum
ESR (Equivalent Series Resistance)	4.5 Ohm
Operating Temperature Range	-55°C to 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
AEC-Q200 Rating	Yes

Substitute Part Grouping Explanation

Substitution eligibility for the F971A335MAA is determined by the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 3.3 µF (exact match required)
Voltage Rating: 10 V (minimum, equal or higher acceptable)
Package / Case: 1206 (3216 Metric) (exact match required for PCB compatibility)
Mounting Type: Surface Mount (exact match required)
Operating Temperature Range: -55°C to 125°C (minimum coverage required)

Allowable Variation Parameters:

Tolerance: ±20% or tighter (±10% acceptable as improvement)
ESR: 4.5 Ohm baseline; variations within 5.5 Ohm acceptable for general-purpose applications
Moisture Sensitivity Level: MSL 3 or better acceptable
RoHS Compliance: ROHS3 required

Identified Substitutes:

F971A335KAA (KYOCERA AVX) – Parametric equivalent with improved tolerance (±10% vs ±20%)
T491A335M010AT (KEMET) – Direct functional equivalent with different ESR and MSL characteristics

Parameter Comparison

Parameter	F971A335MAA (Main)	F971A335KAA (Substitute)	T491A335M010AT (Substitute)
Manufacturer	KYOCERA AVX	KYOCERA AVX	KEMET
Capacitance	3.3 µF	3.3 µF	3.3 µF
Tolerance	±20%	±10%	±20%
Voltage Rating	10 V	10 V	10 V
Package / Case	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Type	Molded Tantalum	Molded Tantalum	Molded Tantalum
ESR	4.5 Ohm	4.5 Ohm	5.5 Ohm
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Height - Seated (Max)	0.047" (1.20mm)	0.047" (1.20mm)	0.071" (1.80mm)
MSL Rating	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q200	Yes	Yes	No
Inventory	681 Pcs	1675 Pcs	6719 Pcs

Engineering Selection Recommendations

F971A335KAA (KYOCERA AVX): This part is the primary parametric equivalent. It maintains identical electrical specifications to the F971A335MAA with the exception of improved tolerance (±10% vs ±20%). Both parts carry AEC-Q200 automotive qualification and ROHS3 compliance. Physical dimensions and ESR characteristics are identical. This substitute is suitable for direct replacement in automotive and high-reliability applications without design modification.

T491A335M010AT (KEMET): This part matches the core electrical parameters (3.3 µF, 10 V, ±20% tolerance) and package footprint (1206). However, it differs in the following characteristics: ESR is 1.0 Ohm higher (5.5 Ohm vs 4.5 Ohm), seated height is 0.024" greater (1.80mm vs 1.20mm), MSL rating is superior (1 vs 3), and AEC-Q200 qualification is not present. This substitute is suitable for general-purpose applications where automotive qualification is not required and PCB clearance accommodates the increased height. The higher ESR may impact performance in noise-sensitive or high-frequency ripple current applications.

Frequently Asked Questions (FAQ)

Q: Can F971A335KAA be used as a direct replacement for F971A335MAA?

A: Yes. The F971A335KAA is a direct parametric equivalent with identical electrical performance and package specifications. The improved tolerance (±10%) provides tighter capacitance control. Both parts are AEC-Q200 qualified and ROHS3 compliant.

Q: What is the primary difference between F971A335MAA and T491A335M010AT?

A: The main differences are ESR (4.5 Ohm vs 5.5 Ohm), seated height (1.20mm vs 1.80mm), and automotive qualification (AEC-Q200 present vs absent). The T491A335M010AT is suitable for general-purpose applications but not for automotive designs requiring AEC-Q200 certification.

Q: Will T491A335M010AT fit on the same PCB as F971A335MAA?

A: The footprint is identical (1206 package), but the seated height differs by 0.024" (0.60mm). PCB clearance must be verified before substitution. If vertical clearance is limited, the T491A335M010AT may not be compatible.

Q: Are all three parts ROHS3 compliant?

A: Yes. F971A335MAA, F971A335KAA, and T491A335M010AT are all ROHS3 compliant.

Q: Which substitute should be selected for automotive applications?

A: F971A335KAA is the recommended substitute for automotive applications. It maintains AEC-Q200 qualification and identical electrical specifications to the F971A335MAA. T491A335M010AT lacks AEC-Q200 certification and is not suitable for automotive designs.

Q: How does MSL rating affect component handling?

A: F971A335MAA and F971A335KAA have MSL 3 rating (168-hour moisture sensitivity limit). T491A335M010AT has MSL 1 rating (unlimited moisture sensitivity). Lower MSL numbers indicate greater tolerance to moisture exposure and longer shelf life without baking requirements.

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