Equivalent & Substitute Parts for KMQ400VS331M30X35T2

Part Overview

The KMQ400VS331M30X35T2 is a 330 µF, 400 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KMQ series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring 2000 hours of operational life at 105°C. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and procurement planning.

Substiute Parts

KMQ400VS331M30X35T2

Chemi-ConIn Stock: 795KMQ400VS331M30X35T2 Datasheet

Current PartRFQ

EKMQ401VSN331MR35S

Chemi-ConIn Stock: 1055EKMQ401VSN331MR35S Datasheet

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381LQ331M400K032

Cornell Dubilier Electronics (CDE)In Stock: 1986381LQ331M400K032 Datasheet

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LAR2G331MELB35

NichiconIn Stock: 91292LAR2G331MELB35 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the KMQ400VS331M30X35T2 is determined by strict equivalence across the following parameters:

• Capacitance Value: 330 µF (exact match required)
• Voltage Rating: 400 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime Specification: 2000 Hrs @ 105°C (exact match required)
• Operating Temperature Range: -25°C ~ 105°C (exact match required)
• Package Configuration: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Diameter: 1.181" (30.00mm) (exact match required)

All three substitute parts meet these core electrical and mechanical requirements. Variations in ESR (Equivalent Series Resistance), ripple current specifications at different frequencies, and physical height within acceptable tolerances do not disqualify substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

EKMQ401VSN331MR35S (Chemi-Con): This substitute maintains the same manufacturer lineage as the main part, belonging to the KMQ series. It is classified as active product status and achieves ROHS3 compliance. This option provides continuity with the original design source while offering improved regulatory compliance and ongoing availability.

381LQ331M400K032 (Cornell Dubilier Electronics): This substitute is manufactured by Cornell Dubilier Electronics and achieves ROHS3 compliance. It demonstrates superior ESR performance at 553 mOhm compared to the main part's 754 mOhm, indicating lower impedance characteristics. Active product status ensures long-term procurement viability.

LAR2G331MELB35 (Nichicon): This substitute is manufactured by Nichicon and achieves ROHS3 compliance. Physical height is reduced to 1.378" (35.00mm) compared to the main part's 1.457" (37.00mm), providing a 0.079" (2.00mm) reduction in vertical space. Active product status and highest inventory availability (91,200 pcs) support sustained supply chain access.

All three substitutes satisfy the core electrical and mechanical requirements for direct replacement in applications originally designed for the KMQ400VS331M30X35T2.

Frequently Asked Questions (FAQ)

Q: Can EKMQ401VSN331MR35S replace KMQ400VS331M30X35T2 in existing designs?

A: Yes. Both parts share identical capacitance (330 µF), voltage rating (400 V), tolerance (±20%), lifetime specification (2000 Hrs @ 105°C), operating temperature range (-25°C ~ 105°C), package type (Radial, Can - Snap-In), lead spacing (0.394"/10.00mm), and diameter (1.181"/30.00mm). Physical height and ESR specifications are compatible with the original design envelope.

Q: What is the primary difference between 381LQ331M400K032 and the main part?

A: The 381LQ331M400K032 is manufactured by Cornell Dubilier Electronics rather than Chemi-Con. It exhibits lower ESR at 553 mOhm versus 754 mOhm in the main part. All other electrical and mechanical parameters remain equivalent. This lower ESR may provide improved ripple current handling in specific circuit topologies.

Q: Why does LAR2G331MELB35 have a different height specification?

A: The LAR2G331MELB35 manufactured by Nichicon has a seated height of 1.378" (35.00mm) compared to 1.457" (37.00mm) for the main part. This 2.00mm reduction in height does not affect electrical performance or lead spacing. Applications with vertical space constraints may benefit from this dimensional difference.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts (EKMQ401VSN331MR35S, 381LQ331M400K032, and LAR2G331MELB35) are ROHS3 compliant. The main part KMQ400VS331M30X35T2 is RoHS non-compliant. Substitution with any of these parts upgrades regulatory compliance status.

Q: Which substitute part offers the best inventory availability?

A: LAR2G331MELB35 offers the highest inventory availability at 91,200 pcs in stock. EKMQ401VSN331MR35S provides 980 pcs, and 381LQ331M400K032 provides 1,882 pcs. Inventory levels support procurement planning for volume requirements.

Q: Can these substitutes be used interchangeably in the same circuit board?

A: Yes. All substitute parts maintain identical lead spacing (0.394"/10.00mm) and diameter (1.181"/30.00mm). PCB footprints designed for the KMQ400VS331M30X35T2 accommodate all three substitutes. The LAR2G331MELB35 with reduced height (1.378"/35.00mm) fits within the original design envelope and may provide additional clearance in space-constrained layouts.