SLP331M315A9P3 Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The SLP331M315A9P3 is a 330 µF, 315 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the SLP0712TE series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring stable performance across extended operating temperatures from -25°C to 105°C with a rated lifetime of 3000 hours at 105°C. The part is currently active in production with ROHS3 compliance and REACH unaffected status. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

SLP331M315A9P3

Cornell Dubilier Electronics (CDE)In Stock: 838SLP331M315A9P3 Datasheet

Current PartRFQ

EKMS401VSN331MP50S

Chemi-ConIn Stock: 1387EKMS401VSN331MP50S Datasheet

UpgradeRFQ

LGU2F331MELZ

NichiconIn Stock: 1221LGU2F331MELZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of aluminum electrolytic capacitors is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitution relationships:

Primary Substitution Criteria:

• Capacitance value must be identical: 330 µF
• Tolerance must be identical or tighter: ±20%
• Voltage rating must be equal to or greater than the original: minimum 315 V
• Operating temperature range must encompass or match the original: -25°C to 105°C
• Lifetime at rated temperature must be equal to or exceed the original: minimum 3000 Hrs @ 105°C
• Package and mounting type must be identical: Radial, Can - Snap-In, Through Hole
• Lead spacing must be identical: 0.394" (10.00 mm)
• Physical dimensions (diameter and height) must be compatible with PCB layout constraints

Compliance Requirements:

• RoHS3 compliance required
• REACH unaffected status required
• Polarization must remain Polar

Substitute parts are classified into two categories: Upgrade (higher voltage rating) and Parametric Equivalent (matching voltage rating).

Parameter Comparison

Engineering Selection Recommendations

SLP331M315A9P3 (Main Part) Use this part when the original design specification calls for 315 V rated voltage and the application does not require higher voltage margin. This part is the baseline reference with documented ESR of 1.005 Ohm @ 120Hz and is suitable for general-purpose applications within the specified operating envelope.

EKMS401VSN331MP50S (Upgrade Substitute) This Chemi-Con KMS series capacitor provides a voltage upgrade to 400 V while maintaining identical capacitance, tolerance, and lifetime specifications. The upgrade is applicable in designs where higher voltage headroom is beneficial for circuit reliability or where supply voltage margins require additional safety factor. Physical height increases by 0.020" (0.50 mm) to 2.067" (52.50 mm); verify PCB layout clearance before substitution. Ripple current capability increases to 1.47 A @ 120 Hz and 2.1021 A @ 50 kHz, supporting higher current applications. All compliance certifications (ROHS3, REACH Unaffected) are maintained.

LGU2F331MELZ (Parametric Equivalent) This Nichicon LGU series capacitor matches the original voltage rating of 315 V and maintains identical physical dimensions (2.047" height, 22.00 mm diameter). Capacitance, tolerance, and lifetime specifications are identical. This part is suitable for direct replacement in applications where voltage rating and form factor must remain unchanged. Ripple current @ 50 kHz is 1.5295 A. All compliance certifications are maintained.

All three parts are active products with current manufacturing status and full regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can EKMS401VSN331MP50S be used as a direct drop-in replacement for SLP331M315A9P3?

A: EKMS401VSN331MP50S is mechanically compatible with identical lead spacing (10.00 mm) and diameter (22.00 mm). However, the seated height increases from 2.047" to 2.067" (0.50 mm difference). Verify that the PCB layout and surrounding component placement accommodate this height increase before substitution. Electrical parameters (capacitance, tolerance, lifetime) are identical, and the higher voltage rating (400 V vs. 315 V) is backward compatible with 315 V circuit designs.

Q: What is the difference between an "Upgrade" substitute and a "Parametric Equivalent"?

A: An Upgrade substitute (EKMS401VSN331MP50S) provides enhanced electrical performance, specifically a higher voltage rating (400 V vs. 315 V), while maintaining all other critical parameters. A Parametric Equivalent (LGU2F331MELZ) matches the original part's electrical and mechanical specifications exactly, including voltage rating. Selection depends on circuit requirements and design margins.

Q: Are all three parts suitable for the same applications?

A: All three parts share identical capacitance (330 µF), tolerance (±20%), operating temperature range (-25°C to 105°C), and lifetime (3000 Hrs @ 105°C). They are suitable for the same general-purpose applications. The choice between them depends on voltage rating requirements and available inventory. The upgrade part (400 V) provides additional voltage margin for circuits operating near the 315 V limit.

Q: What are the key mechanical constraints for substitution?

A: Lead spacing must remain 0.394" (10.00 mm) for PCB hole alignment. Diameter is fixed at 0.866" (22.00 mm) for all three parts. Height is the primary variable: SLP331M315A9P3 and LGU2F331MELZ are 2.047" (52.00 mm), while EKMS401VSN331MP50S is 2.067" (52.50 mm). Verify clearance above the capacitor for any mounted components or heatsinks.

Q: Are there any compliance or certification differences between the three parts?

A: All three parts are ROHS3 compliant and REACH unaffected. No compliance differences exist. All parts are active products with current manufacturing status.

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

A: ESR affects ripple current handling and heat dissipation. The main part SLP331M315A9P3 specifies ESR of 1.005 Ohm @ 120Hz. The substitute parts do not provide ESR specifications in the available data. For applications where ESR is a critical design parameter, the main part's documented ESR value should be used as the reference.

Q: Can LGU2F331MELZ be used interchangeably with SLP331M315A9P3 in all designs?

A: Yes. LGU2F331MELZ is a parametric equivalent with matching voltage rating (315 V), identical physical dimensions, and identical electrical specifications (capacitance, tolerance, lifetime, operating temperature). It is suitable for direct substitution in all applications designed for SLP331M315A9P3.