LPX331M350E5P3 Equivalent & Substitute Parts

Part Overview

The LPX331M350E5P3 is a 330 µF, 350 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 stable capacitance and low equivalent series resistance over extended operating periods. The part is Active in product status and fully compliant with RoHS3 and REACH regulations. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the allowed parameter tolerances for this capacitor category.

Substiute Parts

LPX331M350E5P3

Cornell Dubilier Electronics (CDE)In Stock: 858LPX331M350E5P3 Datasheet

Current PartRFQ

LPX331M400E7P3

Cornell Dubilier Electronics (CDE)In Stock: 2157LPX331M400E7P3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LPX331M350E5P3 are identified based on strict electrical and mechanical compatibility criteria. The following parameters must remain constant or within acceptable ranges:

Fixed Parameters (No Substitution Allowed):

• Capacitance: 330 µF (±20% tolerance band)
• Polarization: Polar
• Mounting Type: Through Hole
• Package / Case: Radial, Can - Snap-In
• Lead Spacing: 10.00 mm
• Diameter: 30.00 mm
• Series: LPX
• Manufacturer: Cornell Dubilier Electronics (CDE)

Allowable Variation Parameters:

• Voltage - Rated: May increase above 350 V (higher voltage rating provides backward compatibility)
• Height - Seated (Max): May increase within mechanical envelope constraints
• ESR @ 120 Hz: Must remain at 603 mOhm (identical specification)
• Ripple Current: May increase proportionally with voltage rating
• Lifetime @ 85°C: Must remain at 1000 Hrs minimum

The LPX331M400E7P3 qualifies as a substitute because it maintains identical capacitance, tolerance, ESR, lifetime, lead spacing, and diameter while providing a higher voltage rating (400 V vs. 350 V) and increased height (40.00 mm vs. 35.00 mm).

Parameter Comparison

Engineering Selection Recommendations

LPX331M350E5P3 (Primary Selection): Use this part when the application circuit is designed for 350 V operation and the PCB layout accommodates a maximum seated height of 35.00 mm. This part is Active in product status with 788 units in stock.

LPX331M400E7P3 (Substitute Selection): Use this part when higher voltage margin is required (400 V rating vs. 350 V) or when increased ripple current handling is necessary. The substitute maintains identical electrical performance (capacitance, ESR, lifetime) while providing enhanced voltage and current ratings. The seated height increases by 5 mm to 40.00 mm; verify PCB clearance before selection. This part is Active in product status with 2134 units in stock. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can LPX331M400E7P3 be used in place of LPX331M350E5P3?

A: Yes. The LPX331M400E7P3 is electrically and mechanically compatible. It provides identical capacitance (330 µF), tolerance (±20%), ESR (603 mOhm @ 120 Hz), and lifetime (1000 Hrs @ 85°C). The substitute has a higher voltage rating (400 V vs. 350 V) and increased ripple current capability. The only dimensional difference is seated height: 40.00 mm vs. 35.00 mm. Verify PCB clearance before installation.

Q: What are the key compatibility criteria for these substitutes?

A: Substitution is based on matching capacitance value, tolerance band, ESR specification, lifetime rating, lead spacing (10.00 mm), can diameter (30.00 mm), and mounting type (through-hole radial snap-in). Voltage rating may be higher in the substitute. Operating temperature range and polarization must remain identical.

Q: Does the 5 mm height difference affect PCB layout?

A: The LPX331M400E7P3 is 5 mm taller (40.00 mm seated height vs. 35.00 mm). Verify available vertical clearance in the PCB assembly before substitution. If space is constrained, the original LPX331M350E5P3 must be used.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both LPX331M350E5P3 and LPX331M400E7P3 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the difference in ripple current ratings?

A: The LPX331M400E7P3 has higher ripple current ratings due to its increased voltage rating. At 120 Hz: 1.6 A (vs. 1.4 A). At 50 kHz: 1.92 A (vs. 1.68 A). Both parts maintain identical ESR (603 mOhm @ 120 Hz).

Q: Can the original part be used if the substitute is out of stock?

A: No. The relationship is unidirectional. The substitute (higher voltage rating) can replace the original, but the original cannot replace the substitute in applications requiring 400 V operation.