ALC70D331DC450 Equivalent & Substitute Parts

Part Overview

The ALC70D331DC450 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by KEMET in the ALC70 series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is Active in product status with 273,982 pieces currently in stock. Equivalent substitute parts may be required due to supply chain constraints, inventory availability, or specific procurement requirements while maintaining identical electrical and mechanical performance.

Substiute Parts

ALC70D331DC450

KEMETIn Stock: 273998ALC70D331DC450 Datasheet

Current PartRFQ

ALC70A331DC450

KEMETIn Stock: 1664ALC70A331DC450 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ALC70D331DC450 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part ALC70A331DC450 qualifies as a parametric equivalent based on the following criteria:

Electrical Parameters (Must Match Exactly):

• Capacitance: 330 µF
• Voltage Rating: 450 V
• Tolerance: ±20%
• ESR @ 100Hz: 426.8 mOhm
• Lifetime @ 85°C: 15000 Hrs
• Operating Temperature Range: -40°C ~ 85°C
• Ripple Current @ 100 Hz: 1.97 A
• Ripple Current @ 10 kHz: 4.64 A
• Impedance: 241 mOhms

Mechanical Parameters (Must Match Exactly):

• Lead Spacing: 0.394" (10.00 mm)
• Diameter: 1.378" (35.00 mm)
• Height - Seated (Max): 1.457" (37.00 mm)
• Mounting Type: Through Hole
• Package / Case: Radial, Can - Snap-In

Compliance & Certification (Must Match):

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

The substitute part differs only in the base product number designation (ALC70A versus ALC70D), with no impact on functional performance or physical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the ALC70D331DC450 and ALC70A331DC450 are Active products manufactured by KEMET with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on availability and procurement lead time, as they are electrically and mechanically identical.

The ALC70D331DC450 currently maintains higher inventory (273,982 pieces) compared to the ALC70A331DC450 (1,582 pieces). For applications requiring immediate availability, the ALC70D331DC450 is the preferred selection. For applications where supply of the primary part is constrained, the ALC70A331DC450 provides direct functional equivalence without design modification or re-qualification.

Both parts meet the same regulatory requirements and are suitable for general-purpose high-voltage filtering and energy storage applications within the specified operating temperature range of -40°C to 85°C.

Frequently Asked Questions (FAQ)

Q: Can ALC70A331DC450 be used as a direct replacement for ALC70D331DC450?

A: Yes. The ALC70A331DC450 is a parametric equivalent with identical electrical specifications, mechanical dimensions, and compliance certifications. Direct substitution is possible without circuit modification.

Q: What is the difference between the ALC70D and ALC70A designations?

A: The base product number designation (D versus A) does not reflect differences in electrical performance or physical characteristics. Both parts are from the ALC70 series and share identical specifications for capacitance, voltage, ESR, ripple current, and physical dimensions.

Q: Are the snap-in mounting interfaces identical between these parts?

A: Yes. Both parts feature identical radial, can-style snap-in packaging with 0.394" (10.00 mm) lead spacing and 1.378" (35.00 mm) diameter. PCB footprints and mounting hardware compatibility are identical.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both ALC70D331DC450 and ALC70A331DC450 are ROHS3 compliant and REACH unaffected. They meet identical regulatory requirements for use in regulated applications.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -40°C to 85°C with a rated lifetime of 15,000 hours at 85°C. Thermal performance and derating characteristics are identical.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. No design changes, PCB modifications, or re-qualification are required when substituting between these parts. They are direct functional equivalents.