ALA7DC681DF450 Equivalent & Substitute Parts

Part Overview

The ALA7DC681DF450 is a 680 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by KEMET. This component is designed for automotive applications and maintains active product status with AEC-Q200 qualification. The part operates across -40°C to 85°C with a rated lifetime of 15000 hours at 85°C. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the allowed specifications for this product category, ensuring functional interchangeability in circuit applications.

Substiute Parts

ALA7DC681DF450

KEMETIn Stock: 975ALA7DC681DF450 Datasheet

Current PartRFQ

ALA7DA681DF450

KEMETIn Stock: 912ALA7DA681DF450 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALA7DC681DF450 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Capacitance: 680 µF
• Voltage Rating: 450 V
• Tolerance: ±20%
• ESR @ 100Hz: 227.8 mOhm
• Lifetime @ 85°C: 15000 Hrs
• Operating Temperature Range: -40°C to 85°C
• Polarization: Polar

Mechanical Parameters (Must Match):

• Package Type: Radial, Can - Snap-In
• Mounting Type: Through Hole
• Size / Dimension: 1.378" Dia (35.00mm)
• Height - Seated (Max): 2.047" (52.00mm)

Compliance Parameters (Must Match):

• Ratings: AEC-Q200
• RoHS Status: ROHS3 Compliant
• Applications: Automotive

The substitute part ALA7DA681DF450 maintains equivalence across all critical electrical, mechanical, and compliance parameters. Variations in ripple current specifications and impedance values do not disqualify substitution when all primary parameters remain within specification.

Parameter Comparison

Engineering Selection Recommendations

The ALA7DA681DF450 is a direct parametric equivalent to the ALA7DC681DF450 for applications requiring 680 µF, 450 V aluminum electrolytic capacitors in automotive environments. Both parts maintain identical electrical specifications, mechanical dimensions, and compliance certifications including AEC-Q200 qualification and ROHS3 compliance.

Selection between these parts is based on availability and inventory status. The ALA7DC681DF450 maintains 949 pieces in stock, while the ALA7DA681DF450 maintains 899 pieces in stock. Both parts are manufactured by KEMET and carry active product status, ensuring continued supply and technical support.

The substitute part exhibits lower impedance (567.8 mOhms versus 759.6 mOhms) and higher ripple current capability at 100 Hz (1.9 A versus 1.54 A), which represents improved performance characteristics within the same electrical rating envelope. These variations do not affect functional interchangeability in circuit applications where the primary electrical parameters—capacitance, voltage rating, tolerance, and ESR—remain constant.

Frequently Asked Questions (FAQ)

Q: Can ALA7DA681DF450 be used as a direct replacement for ALA7DC681DF450?

A: Yes. Both parts are manufactured by KEMET with identical capacitance (680 µF), voltage rating (450 V), tolerance (±20%), ESR (227.8 mOhm @ 100Hz), and lifetime specifications (15000 Hrs @ 85°C). Mechanical dimensions, mounting type, and package configuration are identical. Both carry AEC-Q200 automotive qualification and ROHS3 compliance.

Q: Are there differences in performance between these two parts?

A: The ALA7DA681DF450 exhibits lower impedance (567.8 mOhms versus 759.6 mOhms) and higher ripple current capability at 100 Hz (1.9 A versus 1.54 A). These represent improved performance characteristics. Ripple current at 10 kHz is equivalent (3.7 A). These differences do not affect functional interchangeability where the primary electrical parameters remain constant.

Q: What are the critical parameters for substitution?

A: Substitution is valid when capacitance, voltage rating, tolerance, ESR @ 100Hz, lifetime at 85°C, operating temperature range, polarization, package type, mounting type, physical dimensions, and compliance ratings (AEC-Q200, ROHS3) remain equivalent. Both parts meet these criteria.

Q: Are both parts suitable for automotive applications?

A: Yes. Both ALA7DC681DF450 and ALA7DA681DF450 are rated for automotive applications and carry AEC-Q200 qualification, confirming suitability for automotive-grade circuit designs.

Q: What is the difference between the ALA7D series designations (ALA7DC versus ALA7DA)?

A: The base product number differs (ALA7DC versus ALA7DA), indicating different internal design or manufacturing variants within the ALA7D series. However, the electrical and mechanical specifications provided are equivalent, making them functionally interchangeable for the specified application parameters.

Q: Can these parts be used interchangeably in existing designs without circuit modification?

A: Yes. The identical electrical ratings, mechanical dimensions, and mounting configuration allow direct substitution without circuit modification. The improved performance characteristics of the ALA7DA681DF450 (lower impedance, higher ripple current) are compatible with existing circuit designs.