ALA7DD331DC500 Equivalent & Substitute Parts

Part Overview

The ALA7DD331DC500 is a 330 µF, 500 V aluminum electrolytic capacitor manufactured by KEMET in the ALA7D series. This component is a radial, can-style snap-in capacitor designed for through-hole mounting in automotive applications. The part maintains an active product status and carries AEC-Q200 automotive qualification. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

ALA7DD331DC500

KEMETIn Stock: 999ALA7DD331DC500 Datasheet

Current PartRFQ

ALA7DA331DC500

KEMETIn Stock: 1947ALA7DA331DC500 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ALA7DD331DC500 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Capacitance value: 330 µF (exact match required)
• Rated voltage: 500 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package type: Radial, Can - Snap-In (exact match required)
• Mounting type: Through Hole (exact match required)
• Physical dimensions: 1.378" Dia × 1.457" Height (exact match required)
• Polarization: Polar (exact match required)
• Operating temperature range: -40°C to +85°C (exact match required)
• AEC-Q200 automotive qualification (exact match required)
• RoHS3 compliance (exact match required)

Allowable Variation Parameters:

• ESR @ 100 Hz: Variation permitted within component manufacturing tolerances
• Ripple current ratings: Variation permitted; substitute must meet or exceed main part specifications
• Impedance: Variation permitted; substitute must meet or exceed main part specifications
• Lifetime @ 85°C: Variation permitted; substitute must meet or exceed main part specifications

The substitute part ALA7DA331DC500 satisfies all mandatory equivalence criteria and demonstrates acceptable variation in allowable parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the ALA7DD331DC500 and ALA7DA331DC500 are active, ROHS3-compliant products manufactured by KEMET with AEC-Q200 automotive qualification. The parts are mechanically and electrically interchangeable for applications requiring 330 µF, 500 V aluminum electrolytic capacitors in radial, snap-in through-hole configurations.

The ALA7DA331DC500 substitute demonstrates improved impedance performance (196.8 mOhms versus 228 mOhms) and higher ripple current capability at 100 Hz (2.5 A versus 2.18 A), while maintaining identical core electrical specifications and physical dimensions. Both parts support the same operating temperature range (-40°C to +85°C) and lifetime rating (15000 Hrs @ 85°C).

Selection between these parts is based on inventory availability and supply chain requirements. No technical performance trade-offs exist that would restrict substitution in automotive applications meeting AEC-Q200 standards.

Frequently Asked Questions (FAQ)

Q: Can ALA7DA331DC500 be used as a direct replacement for ALA7DD331DC500?

A: Yes. Both parts are KEMET ALA7D series aluminum electrolytic capacitors with identical capacitance (330 µF), voltage rating (500 V), tolerance (±20%), package type (radial snap-in), and physical dimensions (1.378" Dia × 1.457" Height). Both carry AEC-Q200 automotive qualification and ROHS3 compliance. The substitute meets or exceeds the main part's electrical performance specifications.

Q: Are there physical dimension differences between these parts?

A: No. Both parts share identical physical dimensions: 1.378" diameter (35.00 mm) and 1.457" maximum seated height (37.00 mm). Both are through-hole mounted radial, can-style snap-in capacitors. PCB footprints and mechanical mounting requirements are identical.

Q: What is the difference in impedance between these parts?

A: The ALA7DA331DC500 has lower impedance (196.8 mOhms) compared to the ALA7DD331DC500 (228 mOhms). Lower impedance is generally favorable for ripple current handling and thermal performance. This represents an improvement in the substitute part.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the ALA7DD331DC500 and ALA7DA331DC500 carry AEC-Q200 automotive qualification and are ROHS3 compliant. Both are suitable for automotive applications requiring these certifications.

Q: Is there a difference in ripple current ratings?

A: The parts show variation in ripple current specifications. At 100 Hz, the ALA7DA331DC500 provides higher ripple current (2.5 A versus 2.18 A). At 10 kHz, the ALA7DD331DC500 provides higher ripple current (5.43 A versus 5.18 A). Application-specific ripple current requirements determine which part is optimal for a given circuit.

Q: Are both parts currently in production?

A: Yes. Both the ALA7DD331DC500 and ALA7DA331DC500 maintain active product status with KEMET. Both are available for new designs and ongoing production support.