SLP331M400E4P3 Equivalent & Substitute Parts

Part Overview

The SLP331M400E4P3 is a 330 µF, 400 V aluminum electrolytic capacitor in a radial, can snap-in package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as active and suitable for general purpose applications. Substitute parts are identified when original inventory is unavailable or when design requirements allow for parametrically equivalent alternatives that maintain the same electrical and mechanical specifications within the established tolerances.

Substiute Parts

SLP331M400E4P3

Cornell Dubilier Electronics (CDE)In Stock: 847SLP331M400E4P3 Datasheet

Current PartRFQ

381LR331M400K042

Cornell Dubilier Electronics (CDE)In Stock: 2240381LR331M400K042 Datasheet

DirectRFQ

381LX331M400K452

Cornell Dubilier Electronics (CDE)In Stock: 909381LX331M400K452 Datasheet

Parametric EquivalentRFQ

B43504A9337M000

EPCOS - TDK ElectronicsIn Stock: 134235B43504A9337M000 Datasheet

DirectRFQ

LGW2G331MELB40

NichiconIn Stock: 273838LGW2G331MELB40 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution relationships for the SLP331M400E4P3 are determined by strict equivalence in the following parameters:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 400 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Package / Case: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lifetime @ Temperature: 3000 Hrs @ 105°C (exact match required)
• Operating Temperature Range: -25°C ~ 105°C (exact match required)

Additional parameters such as ESR, ripple current ratings, and physical height may vary within acceptable design margins while maintaining functional equivalence. Parts are classified as direct manufacturer alternatives when all mandatory parameters align with the original specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Direct Equivalent): 381LR331M400K042 (Cornell Dubilier) is the direct manufacturer alternative, offering identical capacitance, voltage, tolerance, and thermal specifications. This part maintains active product status and ROHS3 compliance. The reduced height (1.654" vs 1.850") and improved ESR (402 mOhm vs 1.005 Ohm) may provide enhanced performance characteristics in space-constrained applications.

Parametric Equivalent: 381LX331M400K452 (Cornell Dubilier) and LGW2G331MELB40 (Nichicon) are parametrically equivalent substitutes that maintain all mandatory electrical and mechanical specifications. Both parts carry active product status and full ROHS3 compliance. The LGW2G331MELB40 offers superior ripple current handling (2.33 A @ 120 Hz vs 1.55 A for the original part).

Legacy Alternative: B43504A9337M000 (EPCOS - TDK Electronics) maintains all critical electrical and mechanical parameters but carries a "Not For New Designs" status. This part is suitable only for legacy system support or retrofit applications. The extended operating temperature range (-40°C to 105°C) may be advantageous in specific environmental conditions, and the lower ESR (270 mOhm) provides improved performance metrics.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SLP331M400E4P3 with any of the listed alternatives? A: Direct substitution is possible for all listed parts provided that the physical height constraint and ESR specifications align with your circuit design. The 381LR331M400K042 is the preferred direct alternative from Cornell Dubilier. The LGW2G331MELB40 and 381LX331M400K452 are suitable for applications where height or ripple current performance differs from the original specification.

Q: What are the height differences between substitute parts? A: The SLP331M400E4P3 has a maximum seated height of 1.850" (47.00 mm). The 381LR331M400K042 is shorter at 1.654" (42.00 mm), while the LGW2G331MELB40 is 1.575" (40.00 mm). The 381LX331M400K452 and B43504A9337M000 match the original height at 1.850" (47.00 mm). Verify your PCB layout constraints before selecting a shorter alternative.

Q: How do ESR values affect my circuit performance? A: ESR (Equivalent Series Resistance) impacts ripple current handling and heat generation. The original SLP331M400E4P3 has an ESR of 1.005 Ohm @ 120 Hz. The 381LR331M400K042 (402 mOhm) and B43504A9337M000 (270 mOhm) offer lower ESR values, which reduce losses in high-ripple-current applications. For general purpose applications, this parameter variation is acceptable within standard design tolerances.

Q: Are all substitute parts RoHS compliant? A: All listed substitute parts are ROHS3 Compliant and maintain REACH Unaffected status, ensuring compliance with environmental and regulatory standards applicable to the original SLP331M400E4P3.

Q: Should I use the B43504A9337M000 for new designs? A: No. The B43504A9337M000 carries a "Not For New Designs" product status. This part is suitable only for legacy system maintenance or replacement in existing applications. For new designs, use the 381LR331M400K042, 381LX331M400K452, or LGW2G331MELB40.

Q: Do all parts use the same snap-in package? A: All listed parts use identical Radial, Can - Snap-In packages with matching lead spacing of 0.394" (10.00 mm) and diameter of 1.181" (30.00 mm), ensuring compatibility with standard through-hole PCB layouts.