LPX331M450H7P3 Equivalent & Substitute Parts

Part Overview

The LPX331M450H7P3 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the LPX 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 status and RoHS3 compliant, making it suitable for modern industrial and commercial equipment. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate qualified alternatives.

Substiute Parts

LPX331M450H7P3

Cornell Dubilier Electronics (CDE)In Stock: 1103LPX331M450H7P3 Datasheet

Current PartRFQ

ALC10A331DD450

KEMETIn Stock: 1270ALC10A331DD450 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LPX331M450H7P3 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 330 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage rating: 450 V (exact match required)
• Polarization: Polar (exact match required)

Mechanical Parameters:

• Package type: Radial, Can - Snap-In (exact match required)
• Lead spacing: 0.394" (10.00mm) (exact match required)
• Diameter: 1.378" (35.00mm) (exact match required)
• Mounting type: Through Hole (exact match required)

Compliance Parameters:

• RoHS3 compliance (required for equivalent substitution)

The substitute part ALC10A331DD450 meets all critical electrical and mechanical parameters, enabling direct substitution in applications where the LPX331M450H7P3 is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the LPX331M450H7P3 and ALC10A331DD450 are Active status products with ROHS3 compliance and REACH unaffected status, qualifying them for equivalent substitution in general-purpose applications.

The ALC10A331DD450 demonstrates superior performance characteristics in lifetime rating (15000 Hrs @ 85°C versus 1000 Hrs @ 85°C) and lower ESR (364 mOhm @ 100 Hz versus 603 mOhm @ 120 Hz). The substitute part exhibits a maximum seated height of 1.654" (42.00mm) compared to 1.575" (40.00mm) for the primary part, a difference of 0.079" (2.00mm). This height variance must be evaluated against available board space and mechanical clearance requirements in the target application.

Selection between these parts should be based on inventory availability, lead time requirements, and mechanical space constraints within the application.

Frequently Asked Questions (FAQ)

Q: Can the ALC10A331DD450 be used as a direct replacement for the LPX331M450H7P3?

A: Yes. Both parts share identical electrical specifications (330 µF, ±20%, 450 V), identical mechanical package dimensions (1.378" diameter, 0.394" lead spacing, radial snap-in configuration), and identical mounting type (through-hole). Both are RoHS3 compliant and Active status products.

Q: What is the significance of the height difference between these parts?

A: The ALC10A331DD450 has a maximum seated height of 1.654" (42.00mm) compared to 1.575" (40.00mm) for the LPX331M450H7P3, a difference of 0.079" (2.00mm). This difference must be verified against available vertical clearance in the target application before substitution.

Q: Why does the ALC10A331DD450 have a longer lifetime rating?

A: The ALC10A331DD450 is rated for 15000 Hrs @ 85°C, while the LPX331M450H7P3 is rated for 1000 Hrs @ 85°C. This difference reflects different design and manufacturing approaches between manufacturers but does not affect substitution eligibility, as both meet the specified electrical and mechanical requirements.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8532.22.0040. Both are Active status products suitable for current design implementations.

Q: What is the difference in ESR between these capacitors?

A: The LPX331M450H7P3 has an ESR of 603 mOhm @ 120 Hz, while the ALC10A331DD450 has an ESR of 364 mOhm @ 100 Hz. The lower ESR of the substitute part indicates reduced internal resistance and improved performance in ripple current applications, though both parts meet general-purpose application requirements.

Q: Can these parts be used interchangeably on the same PCB without modification?

A: Electrical substitution is direct. Mechanical verification is required: confirm that the 0.079" (2.00mm) additional height of the ALC10A331DD450 does not exceed available clearance above the PCB. Lead spacing and diameter are identical, requiring no PCB layout changes.