ESMM401VSN331MR35S Equivalent & Substitute Parts

Part Overview

The ESMM401VSN331MR35S 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 industrial temperature ranges. The part is currently active in production with full RoHS compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when supply chain constraints require alternative sourcing, or when design specifications allow for equivalent performance characteristics. Equivalent substitutes maintain the same electrical ratings and mechanical form factor while potentially offering improved thermal performance or extended operational lifetime.

Substiute Parts

ESMM401VSN331MR35S

Chemi-ConIn Stock: 917ESMM401VSN331MR35S 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

Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

• Capacitance: 330 µF
• Voltage Rating: 400 V or higher
• Tolerance: ±20%
• Package Type: Radial, Can - Snap-In
• Lead Spacing: 0.394" (10.00mm)
• Diameter: 1.181" (30.00mm)
• Mounting Type: Through Hole
• Polarization: Polar

Compatible Variation Parameters:

• Operating Temperature Range: May extend beyond -25°C ~ 85°C
• Lifetime @ Temperature: May exceed 3000 Hrs @ 85°C
• ESR (Equivalent Series Resistance): Variations acceptable if electrical performance requirements are met
• Ripple Current: Variations acceptable within application requirements

Substitute Classification:

Direct Equivalents maintain all critical parameters and operate within the original temperature and lifetime specifications:

• B43644B9337M000 (EPCOS - TDK Electronics)
• LLS2G331MELB (Nichicon)
• SLPX331M400E3P3 (Cornell Dubilier Electronics)

Upgraded Substitutes maintain all critical parameters while offering enhanced thermal performance or higher voltage ratings:

• 450USG330MEFCSN30X35 (Rubycon) - 450 V rated
• LGN2G331MELB35 (Nichicon) - Extended temperature to 105°C
• LQSW6331MELB35 (Nichicon) - 420 V rated, extended temperature to 105°C

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Equivalent Performance):

Select B43644B9337M000, LLS2G331MELB, or SLPX331M400E3P3 when the original ESMM401VSN331MR35S is unavailable and the application operates within standard industrial temperature ranges (-25°C to 85°C). All three direct equivalents maintain identical capacitance, voltage rating, tolerance, and mechanical form factor. B43644B9337M000 offers superior ESR performance (280 mOhm @ 100Hz) and extended lifetime (5000 Hrs @ 105°C), making it suitable for demanding applications. LLS2G331MELB and SLPX331M400E3P3 provide equivalent performance with identical ripple current specifications at 120 Hz.

For Enhanced Thermal Performance:

Select LGN2G331MELB35 or LQSW6331MELB35 when the application environment exceeds standard operating temperatures or when extended component lifetime is required. Both parts are rated to 105°C and maintain 3000 Hrs lifetime at this elevated temperature. LGN2G331MELB35 maintains the original 400 V rating, while LQSW6331MELB35 provides 420 V rating for additional voltage margin.

For Increased Voltage Margin:

Select 450USG330MEFCSN30X35 when the application circuit design benefits from higher voltage headroom. This Rubycon part maintains all mechanical and capacitance specifications while providing 450 V rating compared to the original 400 V specification.

Compliance Verification:

All substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original ESMM401VSN331MR35S. All parts are classified as EAR99 and share identical HTSUS code (8532.22.0040).

Frequently Asked Questions (FAQ)

Q: Can SLPX331M400E3P3 be used as a direct replacement for ESMM401VSN331MR35S?

A: Yes. SLPX331M400E3P3 maintains identical capacitance (330 µF), voltage rating (400 V), tolerance (±20%), lead spacing (10.00mm), diameter (30.00mm), and snap-in package configuration. Operating temperature range and lifetime specifications are equivalent. The primary difference is ESR at 603 mOhm @ 120Hz compared to 1.005 Ohm @ 120Hz in the original part, which represents improved performance.

Q: What is the height difference between LLS2G331MELB and the original ESMM401VSN331MR35S?

A: LLS2G331MELB has a maximum seated height of 1.378" (35.00mm) compared to 1.457" (37.00mm) for ESMM401VSN331MR35S. This 2mm reduction in height may be advantageous in space-constrained PCB layouts. All other mechanical dimensions remain identical, and the part maintains the same snap-in mounting interface.

Q: Should I select B43644B9337M000 for all applications?

A: B43644B9337M000 offers superior specifications with extended temperature range (-40°C to 105°C) and longer lifetime (5000 Hrs @ 105°C), but selection depends on application requirements. For standard industrial applications operating at -25°C to 85°C, direct equivalents such as LLS2G331MELB or SLPX331M400E3P3 are appropriate. B43644B9337M000 is recommended when the application environment or reliability requirements exceed standard specifications.

Q: Are the upgraded parts (LGN2G331MELB35, LQSW6331MELB35, 450USG330MEFCSN30X35) backward compatible?

A: Yes. All upgraded parts maintain the critical electrical parameters (330 µF capacitance, ±20% tolerance, snap-in package, 10.00mm lead spacing, 30.00mm diameter) and through-hole mounting configuration. Upgraded parts offer enhanced specifications: extended temperature ratings (105°C), higher voltage ratings (420 V or 450 V), or improved lifetime characteristics. They are electrically and mechanically compatible with circuits designed for the original ESMM401VSN331MR35S.

Q: What is the significance of ESR differences between substitute parts?

A: Equivalent Series Resistance (ESR) affects ripple current handling and heat dissipation. B43644B9337M000 exhibits 280 mOhm @ 100Hz, which is lower than the original 1.005 Ohm @ 120Hz, indicating superior high-frequency performance and reduced thermal generation. SLPX331M400E3P3 at 603 mOhm @ 120Hz represents intermediate performance. For applications with high ripple current or thermal constraints, lower ESR values are advantageous.

Q: Can I use 450USG330MEFCSN30X35 in a 400 V circuit?

A: Yes. 450USG330MEFCSN30X35 is rated for 450 V, which exceeds the original 400 V requirement. Higher voltage-rated capacitors are backward compatible with lower voltage circuits and provide additional safety margin. This part is suitable for 400 V applications and offers enhanced reliability through voltage headroom.

Q: Are all substitute parts available in equivalent quantities?

A: Inventory levels vary by part number. LGN2G331MELB35 and LQSW6331MELB35 show significantly higher inventory (274,082 and 273,882 units respectively) compared to other substitutes. B43644B9337M000, LLS2G331MELB, and SLPX331M400E3P3 maintain moderate inventory levels (1,254, 2,284, and 1,101 units respectively). Availability should be verified at the time of procurement.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts maintain RoHS3 compliance and REACH unaffected status, matching the regulatory framework of the original ESMM401VSN331MR35S. All parts are classified as EAR99 for export control purposes and share the same HTSUS commodity code (8532.22.0040), ensuring consistent regulatory treatment across the supply chain.