SLP331M400H3P3

Part Overview

The SLP331M400H3P3 is a 330 µF, 400 V aluminum electrolytic capacitor with radial snap-in mounting from Cornell Dubilier Electronics (CDE). Classified as Active product status, this component is suitable for general-purpose applications requiring high-voltage energy storage and filtering. Alternative models are identified to support supply chain flexibility, design updates, and component availability optimization across different manufacturing sources while maintaining equivalent electrical performance.

Substiute Parts

SLP331M400H3P3

Cornell Dubilier Electronics (CDE)In Stock: 963SLP331M400H3P3 Datasheet

Current PartRFQ

381LR331M400A022

Cornell Dubilier Electronics (CDE)In Stock: 600219381LR331M400A022 Datasheet

Parametric EquivalentRFQ

LQSW6331MELC30

NichiconIn Stock: 274056LQSW6331MELC30 Datasheet

UpgradeRFQ

B43254C9337M000

EPCOS - TDK ElectronicsIn Stock: 1196B43254C9337M000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SLP331M400H3P3 is determined by strict compliance with the following critical parameters:

• Capacitance Value: 330 µF (fixed requirement)
• Voltage Rating: 400 V minimum (higher ratings acceptable as upgrades)
• Tolerance: ±20%
• Physical Dimensions: Case diameter 1.378" (35.00 mm); Height 1.260" (32.00 mm); Lead spacing 0.394" (10.00 mm)
• Mounting Configuration: Through-hole radial snap-in package
• Operating Temperature: -25°C to +105°C
• Lifetime: 3000 hours @ 105°C
• Polarization: Polar

The identified substitutes are categorized as follows:

Parametric Equivalents share identical voltage ratings (400 V), capacitance, temperature performance, and package specifications:

• 381LR331M400A022 (Cornell Dubilier Electronics)
• B43254C9337M000 (EPCOS - TDK Electronics)

Upgrade Alternative provides higher voltage rating (420 V) with equivalent capacitance and package specifications:

• LQSW6331MELC30 (Nichicon)

Parameter Comparison

Engineering Selection Recommendations

SLP331M400H3P3 (Primary Selection): Active product status from Cornell Dubilier Electronics. Full ROHS3 compliance and specifications provided. Recommended for new designs and ongoing production where CDE supply chain is established.

381LR331M400A022 (Parametric Equivalent): Active product status from Cornell Dubilier Electronics. Identical voltage and capacitance ratings with superior ESR performance (0.402 Ω vs 1.005 Ω @ 120 Hz), resulting in lower thermal dissipation. Full ROHS3 compliance. Suitable where improved thermal performance is advantageous without circuit redesign.

LQSW6331MELC30 (Upgrade Alternative): Active product status from Nichicon. Offers 420 V rating for operation with 400 V nominal circuits, providing enhanced safety margin. ROHS3 compliant. Recommended where higher voltage tolerance is desired and Nichicon supply chain is accessible.

B43254C9337M000 (Legacy Equivalent): Not For New Designs product status from EPCOS - TDK Electronics. Identical electrical specifications to SLP331M400H3P3. ROHS3 compliant. Suitable for legacy system maintenance and field replacements only; not recommended for new designs or product revisions.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SLP331M400H3P3 with the 381LR331M400A022 without circuit modifications?

A: Yes. Both components share identical capacitance (330 µF), voltage rating (400 V), tolerance (±20%), and physical dimensions. The 381LR331M400A022 exhibits lower ESR (0.402 Ω vs 1.005 Ω @ 120 Hz), which improves thermal performance but does not require circuit changes. Board-level compatibility is maintained.

Q: What is the advantage of the LQSW6331MELC30 upgrade option?

A: The LQSW6331MELC30 maintains the same capacitance and physical footprint while providing a higher voltage rating of 420 V. This supplies additional safety margin in 400 V applications and extends component reliability in peak voltage conditions. No circuit redesign is necessary.

Q: Can I use the B43254C9337M000 in new product designs?

A: No. The B43254C9337M000 carries a "Not For New Designs" status. This part is reserved for maintenance of existing systems and field replacements only. The SLP331M400H3P3, 381LR331M400A022, or LQSW6331MELC30 are specified alternatives for new designs.

Q: Are all substitutes mechanically interchangeable with identical snap-in mounting?

A: Yes. All listed alternatives employ through-hole radial snap-in package configuration with matching lead spacing (0.394" / 10.00 mm) and physical case dimensions (1.378" diameter, 1.260" height). Board layouts designed for SLP331M400H3P3 accept all alternatives without modification.

Q: What are the key differences in electrical performance between these substitutes?

A: The primary difference is ESR at 120 Hz: SLP331M400H3P3 exhibits 1.005 Ω, while 381LR331M400A022 provides 0.402 Ω. Lower ESR reduces resistive heating in applications with sustained ripple current. ESR data for LQSW6331MELC30 and B43254C9337M000 were not provided in available specifications. All alternatives maintain 3000-hour lifetime at 105°C and operate across -25°C to +105°C temperature range.

Q: What RoHS and regulatory compliance applies to all substitute options?

A: All identified substitutes—SLP331M400H3P3, 381LR331M400A022, LQSW6331MELC30, and B43254C9337M000—are ROHS3 compliant and REACH unaffected. ECCN classification is EAR99 and HTSUS code is 8532.22.0040 across all variants.