F971E335MBA Equivalent & Substitute Parts

Part Overview

The F971E335MBA is a 3.3 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 25 V with ±20% tolerance. This component is designed for surface mount applications in the 1411 (3528 Metric) package format. The part is actively produced and widely used in automotive and high-reliability applications where compact form factor and stable performance across temperature ranges are required. Alternative parts may be necessary due to inventory constraints, lead time considerations, or specific tolerance and compliance requirements for particular applications.

Key Parameters

Parameter	Value
Capacitance	3.3 µF
Voltage Rating	25 V
Tolerance	±20%
Type	Molded Tantalum
ESR (Equivalent Series Resistance)	4.6 Ohm
Package / Case	1411 (3528 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C to 125°C
RoHS Status	ROHS3 Compliant
AEC-Q200 Rating	Yes

Substitute Part Grouping Explanation

Substitution for the F971E335MBA is determined by strict equivalence across the following critical parameters: capacitance value (3.3 µF), voltage rating (25 V), package format (1411/3528 Metric), mounting type (surface mount), and ESR specification (4.6 Ohm). All substitute parts must maintain these core electrical and mechanical characteristics to ensure functional compatibility within the original circuit design.

The substitute parts identified fall into two categories:

Parametric Equivalent (Same Manufacturer): F971E335KBA differs only in tolerance specification (±10% versus ±20%), while maintaining all other critical parameters. This represents a tighter tolerance variant within the same KYOCERA AVX F97 series.

Direct Equivalent (Alternative Manufacturer): T491B335M025AT from KEMET matches the F971E335MBA across all critical parameters including capacitance, voltage, tolerance, ESR, and package format, with the exception of moisture sensitivity level classification and maximum seated height, which do not affect functional substitution.

Parameter Comparison

Parameter	F971E335MBA	F971E335KBA	T491B335M025AT
Manufacturer	KYOCERA AVX	KYOCERA AVX	KEMET
Capacitance	3.3 µF	3.3 µF	3.3 µF
Tolerance	±20%	±10%	±20%
Voltage Rating	25 V	25 V	25 V
Type	Molded Tantalum	Molded Tantalum	Molded Tantalum
ESR	4.6 Ohm	4.6 Ohm	4.6 Ohm
Package / Case	1411 (3528 Metric)	1411 (3528 Metric)	1411 (3528 Metric)
Size (L x W)	0.138" x 0.110" (4.60mm x 2.80mm)	0.138" x 0.110" (4.60mm x 2.80mm)	0.138" x 0.110" (4.60mm x 2.80mm)
Height - Seated (Max)	0.091" (2.30mm)	0.091" (2.30mm)	0.083" (2.10mm)
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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q200	Yes	Yes	No
MSL Rating	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)

Engineering Selection Recommendations

F971E335KBA (KYOCERA AVX): This substitute is recommended when tighter tolerance control (±10%) is required within the same manufacturer ecosystem. Both parts carry AEC-Q200 automotive qualification and identical moisture sensitivity specifications, making this substitution transparent for automotive and high-reliability applications.

T491B335M025AT (KEMET): This substitute provides functional equivalence with identical electrical specifications and package dimensions. The KEMET part offers superior moisture handling (MSL 1 versus MSL 3) and slightly reduced seated height (2.10mm versus 2.30mm). However, this part does not carry AEC-Q200 certification. Selection of this substitute should be based on application requirements regarding automotive qualification necessity and moisture sensitivity considerations.

Frequently Asked Questions (FAQ)

Q: Can F971E335KBA be used as a direct replacement for F971E335MBA?

A: Yes. The F971E335KBA maintains identical capacitance, voltage rating, ESR, package format, and operating temperature range. The only difference is tolerance specification (±10% versus ±20%), which represents improved accuracy and is functionally compatible with the original design.

Q: What are the key differences between KYOCERA AVX and KEMET substitutes?

A: Both manufacturers provide 3.3 µF, 25 V tantalum capacitors in the 1411 package with 4.6 Ohm ESR. The KEMET T491B335M025AT offers better moisture resistance (MSL 1) but lacks AEC-Q200 automotive certification. The KYOCERA AVX F971E335KBA maintains full automotive qualification with tighter tolerance.

Q: Does the seated height difference between F971E335MBA and T491B335M025AT affect compatibility?

A: The T491B335M025AT has a maximum seated height of 2.10mm compared to 2.30mm for the F971E335MBA. This 0.20mm reduction is within typical PCB assembly tolerances and does not affect functional compatibility. Verify clearance requirements for your specific application layout.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three parts (F971E335MBA, F971E335KBA, and T491B335M025AT) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute should be selected for automotive applications?

A: For automotive applications requiring AEC-Q200 certification, F971E335KBA is the recommended substitute. Both KYOCERA AVX parts carry this qualification. The KEMET T491B335M025AT does not have AEC-Q200 rating and should be evaluated against specific application requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message