Equivalent & Substitute Parts for F950J686KAAAQ2

Part Overview

The Nichicon F950J686KAAAQ2 is a 68 µF conformal coated tantalum capacitor rated at 6.3 V with ±10% tolerance, designed for surface mount applications in the 1206 (3216 Metric) package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The conformal coating provides enhanced environmental protection, though active alternatives with comparable electrical characteristics are available from other manufacturers.

Substiute Parts

F950J686KAAAQ2

NichiconIn Stock: 957F950J686KAAAQ2 Datasheet

Current PartRFQ

T491A686K006AT

KEMETIn Stock: 22200T491A686K006AT Datasheet

SimilarRFQ

T494A686K006AT

KEMETIn Stock: 5874T494A686K006AT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the F950J686KAAAQ2 is determined by strict alignment of the following electrical and mechanical parameters:

• Capacitance Value: 68 µF (exact match required)
• Voltage Rating: 6.3 V (exact match required)
• Tolerance: ±10% (exact match required)
• Package / Case: 1206 (3216 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute parts identified below meet all these criteria. While the main part features conformal coating and the substitutes are molded tantalum capacitors, both types satisfy the electrical specifications and physical constraints of the application. The substitutes are manufactured by KEMET and carry active product status with current inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both KEMET substitute parts (T491A686K006AT and T494A686K006AT) are suitable replacements for the obsolete Nichicon F950J686KAAAQ2 based on matching electrical and mechanical specifications. The KEMET parts carry active product status with documented availability and ROHS3 compliance certification.

The T494A686K006AT offers lower ESR (3 Ohm) compared to the T491A686K006AT (4 Ohm), which may provide performance advantages in applications sensitive to impedance characteristics. Both parts maintain the same capacitance, voltage rating, tolerance, package dimensions, and operating temperature range as the original component.

Height differences should be evaluated against PCB layout constraints: the KEMET substitutes have a maximum seated height of 0.071" (1.80mm) compared to the original 0.063" (1.60mm). Width dimensions are also slightly reduced in the KEMET parts (0.063" vs. 0.067"), which may require verification against board routing and component placement specifications.

Frequently Asked Questions (FAQ)

Q: Can T491A686K006AT and T494A686K006AT be used interchangeably with F950J686KAAAQ2?

A: Both KEMET parts meet the core electrical specifications (68 µF, 6.3 V, ±10%, 1206 package, -55°C to 125°C). Physical dimensions differ slightly in height and width, requiring verification against specific PCB layout requirements before implementation.

Q: What is the significance of the ESR difference between the original and substitute parts?

A: The original F950J686KAAAQ2 specifies 500 mOhm ESR, while the KEMET substitutes specify 4 Ohm (T491A686K006AT) and 3 Ohm (T494A686K006AT). Applications with strict ESR requirements should evaluate whether the higher ESR of the substitutes is acceptable for the intended circuit function.

Q: Are the KEMET substitutes suitable for conformal coating applications?

A: The KEMET parts are molded tantalum capacitors rather than conformal coated. If conformal coating is a design requirement, compatibility with the molded construction should be confirmed with the coating process specification.

Q: What is the difference between T491A686K006AT and T494A686K006AT?

A: Both parts are identical except for ESR specification: T491A686K006AT has 4 Ohm ESR, while T494A686K006AT has 3 Ohm ESR. Selection between them depends on circuit requirements for impedance characteristics.

Q: Are the KEMET substitutes RoHS compliant?

A: Yes, both KEMET parts carry ROHS3 compliance certification. The original Nichicon part does not specify RoHS status.

Q: What is the packaging format for the substitute parts?

A: Both KEMET substitutes are supplied in Tape & Reel (TR) format, suitable for automated assembly processes.