ESMM401VSN331MR35W Equivalent & Substitute Parts

Part Overview

The ESMM401VSN331MR35W is a 330 µF, 400 V aluminum electrolytic capacitor manufactured by Chemi-Con in the SMM series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring stable capacitance and reliable performance across extended operating temperatures. The part is Active in product status and RoHS Compliant, making it suitable for modern industrial and commercial equipment.

Substitute parts are necessary when the original ESMM401VSN331MR35W becomes unavailable due to inventory constraints, supply chain disruptions, or end-of-life status. Alternative manufacturers offer equivalent or upgraded specifications that maintain functional compatibility while meeting the same electrical and mechanical requirements.

Substiute Parts

ESMM401VSN331MR35W

Chemi-ConIn Stock: 794ESMM401VSN331MR35W Datasheet

Current PartRFQ

B43644B9337M000

EPCOS - TDK ElectronicsIn Stock: 1308B43644B9337M000 Datasheet

DirectRFQ

LLS2G331MELB

NichiconIn Stock: 2353LLS2G331MELB Datasheet

DirectRFQ

SLPX331M400E3P3

Cornell Dubilier Electronics (CDE)In Stock: 1147SLPX331M400E3P3 Datasheet

DirectRFQ

450USG330MEFCSN30X35

RubyconIn Stock: 1273450USG330MEFCSN30X35 Datasheet

UpgradeRFQ

LGN2G331MELB35

NichiconIn Stock: 274111LGN2G331MELB35 Datasheet

UpgradeRFQ

LQSW6331MELB35

NichiconIn Stock: 273932LQSW6331MELB35 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ESMM401VSN331MR35W are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Direct Equivalents):

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 400 V (minimum requirement)
• Tolerance: ±20%
• Polarization: Polar
• Package / Case: Radial, Can - Snap-In
• Mounting Type: Through Hole
• Lead Spacing: 0.394" (10.00mm)
• Size / Dimension: 1.181" Dia (30.00mm)

Secondary Compatibility Parameters:

• Operating Temperature Range: -25°C minimum to 85°C maximum
• Lifetime @ Temperature: 3000 Hrs @ 85°C or better
• RoHS Compliance: Required

Upgrade Criteria (Enhanced Performance): Parts exceeding the original specifications in voltage rating, operating temperature range, or lifetime at elevated temperature are classified as upgrades. These maintain all primary substitution criteria while offering improved reliability margins.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Substitutes:

The following parts meet all primary substitution criteria and maintain identical electrical and mechanical specifications:

LLS2G331MELB (Nichicon): This part matches the ESMM401VSN331MR35W across all critical parameters including capacitance, voltage rating, tolerance, operating temperature range, and lifetime. The height dimension is 1.378" (35.00mm), which is within acceptable tolerance for through-hole snap-in applications. ROHS3 Compliant status exceeds the original RoHS Compliant requirement. Inventory availability is 2284 pieces.

SLPX331M400E3P3 (Cornell Dubilier Electronics): This substitute maintains identical capacitance, voltage, tolerance, and operating temperature specifications. The ESR value of 603 mOhm @ 120Hz is higher than the original 1.055 Ohm @ 120Hz, indicating lower impedance performance. Height dimension is 1.181" (30.00mm), providing a more compact profile. ROHS3 Compliant. Inventory availability is 1101 pieces.

Upgraded Substitutes (Enhanced Performance):

B43644B9337M000 (EPCOS - TDK Electronics): This part provides enhanced reliability with 5000 Hrs @ 105°C lifetime compared to the original 3000 Hrs @ 85°C. Operating temperature range extends to -40°C ~ 105°C. ESR of 280 mOhm @ 100Hz indicates superior low-impedance performance. All mechanical dimensions match the original specification. ROHS3 Compliant. Inventory availability is 1254 pieces.

450USG330MEFCSN30X35 (Rubycon): This upgrade offers increased voltage rating of 450 V, providing a 12.5% safety margin above the original 400 V specification. All other electrical parameters remain compatible. Mechanical dimensions match exactly. ROHS3 Compliant. Inventory availability is 1246 pieces.

LGN2G331MELB35 (Nichicon): This upgrade maintains 400 V voltage rating while extending operating temperature to -25°C ~ 105°C and lifetime to 3000 Hrs @ 105°C. Mechanical dimensions match the original specification exactly. ROHS3 Compliant. Inventory availability is 274082 pieces.

LQSW6331MELB35 (Nichicon): This upgrade provides 420 V voltage rating (5% above original specification) and extends operating temperature to -25°C ~ 105°C with 3000 Hrs @ 105°C lifetime. Mechanical dimensions match exactly. ROHS3 Compliant. Inventory availability is 273882 pieces.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher voltage rating than the original ESMM401VSN331MR35W?

A: Yes. Parts with higher voltage ratings (such as 450USG330MEFCSN30X35 at 450 V or LQSW6331MELB35 at 420 V) are electrically compatible with circuits designed for 400 V operation. Higher voltage ratings provide additional safety margin and do not negatively affect circuit performance.

Q: What is the significance of ESR (Equivalent Series Resistance) in capacitor substitution?

A: ESR affects impedance and heat dissipation characteristics. Lower ESR values indicate better high-frequency performance and reduced power loss. The B43644B9337M000 with 280 mOhm @ 100Hz provides superior ESR performance compared to the original 1.055 Ohm @ 120Hz. However, all listed substitutes are electrically compatible for general-purpose applications.

Q: Are all substitute parts mechanically compatible with the original PCB layout?

A: All substitute parts maintain the same lead spacing of 0.394" (10.00mm) and diameter of 1.181" (30.00mm), ensuring PCB footprint compatibility. Height variations exist: LLS2G331MELB is 1.378" (35.00mm), SLPX331M400E3P3 is 1.181" (30.00mm), while others match the original 1.457" (37.00mm). Verify clearance in your specific application before selection.

Q: What does ROHS3 Compliant mean compared to RoHS Compliant?

A: ROHS3 Compliant indicates compliance with the latest RoHS Directive 2011/65/EU as amended by Directive 2015/863/EU, which includes restrictions on additional substances. All substitute parts listed are ROHS3 Compliant, meeting or exceeding the original RoHS Compliant status.

Q: Can I substitute a part with extended operating temperature range (-40°C ~ 105°C) in place of the original (-25°C ~ 85°C)?

A: Yes. Extended operating temperature ranges are backward compatible. A part rated for -40°C ~ 105°C will function correctly in applications requiring only -25°C ~ 85°C operation. This provides additional design margin for thermal stress conditions.

Q: What is the difference between direct equivalents and upgraded substitutes?

A: Direct equivalents (LLS2G331MELB, SLPX331M400E3P3) match all original specifications and are suitable for one-to-one replacement. Upgraded substitutes (B43644B9337M000, 450USG330MEFCSN30X35, LGN2G331MELB35, LQSW6331MELB35) exceed original specifications in voltage rating, operating temperature, or lifetime, offering enhanced reliability while maintaining full compatibility.

Q: Are all substitute parts available in the same packaging as the original?

A: All substitute parts are supplied in Bulk packaging, consistent with the original ESMM401VSN331MR35W. Packaging format does not affect electrical or mechanical compatibility.

Q: Which substitute part should I select for maximum reliability?

A: Selection depends on application requirements. For extended temperature operation, choose LGN2G331MELB35 or LQSW6331MELB35 (rated to 105°C). For superior ESR performance and longest lifetime, select B43644B9337M000 (5000 Hrs @ 105°C). For voltage margin, select 450USG330MEFCSN30X35 (450 V rating). All are Active products with full compliance certifications.