EKMS421VSN331MR35S Equivalent & Substitute Parts

Part Overview

The EKMS421VSN331MR35S is a 330 µF, 420 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KMS series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The component features a 3000-hour lifetime rating at 105°C and operates across a temperature range of -25°C to 105°C. As an active product with ROHS3 compliance, equivalent substitute parts are available from alternative manufacturers to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

EKMS421VSN331MR35S

Chemi-ConIn Stock: 1260EKMS421VSN331MR35S Datasheet

Current PartRFQ

LQSW6331MELB35

NichiconIn Stock: 273932LQSW6331MELB35 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EKMS421VSN331MR35S are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 420 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime: 3000 Hrs @ 105°C (exact match required)
• Operating Temperature Range: -25°C ~ 105°C (exact match required)
• Polarization: Polar (exact match required)

Mechanical Parameters:

• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Size / Dimension: 1.181" Dia (30.00 mm) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can - Snap-In (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (exact match required)

The LQSW6331MELB35 from Nichicon meets all substitution criteria and is classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the EKMS421VSN331MR35S and LQSW6331MELB35 are active products with ROHS3 compliance and REACH unaffected status. Selection between these components is based on availability, lead time, and procurement requirements rather than functional differences.

The LQSW6331MELB35 demonstrates higher inventory availability (273,882 pcs in stock versus 1,156 pcs for the EKMS421VSN331MR35S), making it suitable for applications requiring rapid procurement or large-volume orders. Both components are electrically and mechanically interchangeable within the specified parameters.

The minor variation in height (0.019" difference) and ripple current ratings are within acceptable tolerances for general-purpose applications and do not affect functional compatibility in standard circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the LQSW6331MELB35 be used as a direct replacement for the EKMS421VSN331MR35S?

A: Yes. Both components share identical electrical specifications (330 µF, 420 V, ±20% tolerance, 3000 Hrs @ 105°C), mechanical dimensions (lead spacing and diameter), and mounting configuration (radial, can-style snap-in through-hole). Both are ROHS3 compliant.

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

A: The EKMS421VSN331MR35S has a maximum seated height of 1.476" (37.50 mm), while the LQSW6331MELB35 measures 1.457" (37.00 mm). This 0.019" difference is within standard manufacturing tolerances and does not affect PCB layout or clearance requirements for typical applications.

Q: Are there differences in ripple current handling?

A: The EKMS421VSN331MR35S is rated for 1.48 A @ 120 Hz and 2.1164 A @ 50 kHz. The LQSW6331MELB35 is rated for 1.42 A @ 120 Hz and 2.0306 A @ 50 kHz. Both ratings support general-purpose filtering applications. Component selection should be based on specific ripple current requirements of the application.

Q: What compliance certifications apply to both parts?

A: Both components are ROHS3 compliant and REACH unaffected. Both carry EAR99 export classification and HTSUS code 8532.22.0040.

Q: Which part should be selected for new designs?

A: Selection is based on procurement factors including availability, lead time, and cost. Both components are functionally equivalent and suitable for new designs. The LQSW6331MELB35 offers significantly higher inventory availability.