SLP331M450H7P3

Part Overview

The SLP331M450H7P3 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can-style snap-in package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing system support and new designs. The part is rated for general-purpose applications with an operating temperature range of -25°C to 105°C and a lifetime specification of 3000 hours at 105°C.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
ESR (Equivalent Series Resistance)	1.005 Ω
Lifetime @ 105°C	3000 Hrs
Operating Temperature Range	-25°C to 105°C
Lead Spacing	0.394" (10.00 mm)
Package Diameter	1.378" (35.00 mm)
Package Height (Max)	1.575" (40.00 mm)
Mounting Type	Through Hole
Package/Case	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SLP331M450H7P3 is determined by strict electrical and mechanical parameter matching. All substitute parts must maintain:

Capacitance: 330 µF (core electrical specification)
Voltage Rating: 450 V (minimum required voltage withstand capability)
Tolerance: ±20% (acceptable capacitance variation)
Operating Temperature: -25°C to 105°C (functional range requirement)
Mounting Type: Through Hole (PCB integration requirement)
Package Style: Radial, Can - Snap-In (physical footprint and connectivity)
Lead Spacing: 0.394" (10.00 mm) (PCB hole pattern compatibility)

Substitutes are grouped into two categories:

Direct Substitutes (Same Series): Parts from the same manufacturer (CDE) that share identical electrical specifications and physical dimensions, differing only in packaging format or height tolerance.

Similar Substitutes (Alternative Manufacturers): Parts from manufacturers including Nichicon, EPCOS (TDK Electronics), and Vishay that match all critical electrical and mechanical parameters but may have different performance characteristics in secondary parameters such as ESR values, ripple current ratings, or lifetime hours.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	ESR	Height (Max)	Status
SLP331M450H7P3	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs	1.005 Ω	1.575" (40 mm)	Obsolete
SLP331M450H5P3	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs	1.005 Ω	1.378" (35 mm)	Active
381LQ331M450A032	Cornell Dubilier Electronics	330 µF	450 V	±20%	2000 Hrs	553 mΩ @ 120 Hz	1.457" (37 mm)	Active
381LQ331M450K452	Cornell Dubilier Electronics	330 µF	450 V	±20%	2000 Hrs	553 mΩ @ 120 Hz	1.850" (47 mm)	Active
381LR331M450A042	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs	402 mΩ @ 120 Hz	1.654" (42 mm)	Active
381LR331M450K052	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs	402 mΩ @ 120 Hz	2.047" (52 mm)	Active
381LX331M450A042	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs	Not Specified	1.654" (42 mm)	Active
381LX331M450K052	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs	Not Specified	2.047" (52 mm)	Active
LGW2W331MELC35	Nichicon	330 µF	450 V	±20%	3000 Hrs	Not Specified	1.378" (35 mm)	Active
B43504A5337M000	EPCOS - TDK Electronics	330 µF	450 V	±20%	3000 Hrs	410 mΩ @ 100 Hz	2.047" (52 mm)	Not For New Designs
MAL215957331E3	Vishay Beyschlag/Draloric/BC Components	330 µF	450 V	±20%	5000 Hrs	300 mΩ	1.654" (42 mm)	Active

Engineering Selection Recommendations

Preferred Substitute for New Designs: SLP331M450H5P3 (Cornell Dubilier Electronics) is the optimal direct replacement, manufactured by the original equipment supplier and holding active product status. This part maintains electrical equivalence with identical capacitance, voltage, tolerance, lifetime, and ESR specifications while reducing the mounted height from 1.575" to 1.378", offering improved PCB space efficiency.

Active Status Alternatives (CDE Series): The 381LR series (381LR331M450A042, 381LR331M450K052) provides enhanced performance over the original with reduced ESR values (402 mΩ @ 120 Hz) and matching 3000-hour lifetime, maintaining compatibility across multiple height packages. The 381LX series offers equivalent lifetime performance with variable height options for design flexibility.

Alternative Manufacturer Options: LGW2W331MELC35 (Nichicon) is ROHS3 compliant with active product status and 3000-hour lifetime. MAL215957331E3 (Vishay) offers extended lifetime (5000 hours @ 105°C) and reduced ESR (300 mΩ), suitable for applications requiring superior longevity and lower impedance performance. Both maintain electrical and mechanical compatibility with the original specification.

Avoid for New Designs: B43504A5337M000 (EPCOS - TDK Electronics) carries a "Not For New Designs" status and should be selected only when legacy system support necessitates sourcing.

Frequently Asked Questions (FAQ)

Q: Can I use SLP331M450H5P3 as a direct replacement for SLP331M450H7P3? A: Yes. Both parts are manufactured by Cornell Dubilier Electronics with identical electrical specifications (330 µF, 450 V, ±20%, 1.005 Ω ESR, 3000 Hrs @ 105°C). The primary difference is the mounted height (1.378" versus 1.575"), which reduces PCB footprint while maintaining full electrical equivalence and lead spacing compatibility.

Q: What are the electrical differences between CDE series alternatives? A: The 381LQ series operates at reduced lifetime (2000 hours vs. 3000 hours) with higher ESR (553 mΩ @ 120 Hz). The 381LR and 381LX series restore the 3000-hour lifetime; 381LR offers measured ESR values (402 mΩ @ 120 Hz), while 381LX specifications do not include ESR data. All maintain identical capacitance and voltage ratings.

Q: Are non-CDE manufacturers electrically compatible? A: Yes, provided all critical parameters match: 330 µF capacitance, 450 V minimum rating, ±20% tolerance, -25°C to 105°C operating temperature, through-hole mounting, and 0.394" (10.00 mm) lead spacing. Mechanical height variations must be verified against PCB layout constraints. MAL215957331E3 provides extended 5000-hour lifetime with lower ESR; LGW2W331MELC35 maintains standard 3000-hour lifetime.

Q: What physical constraints must be observed when selecting substitutes? A: Lead spacing must remain 0.394" (10.00 mm) for PCB compatibility. Package diameter is standardized at 1.378" (35.00 mm) for equivalent parts. Height varies from 1.378" (35 mm) minimum to 2.047" (52 mm) maximum across substitute options—verify physical clearance in the PCB assembly before selection.

Q: Which substitute offers the best performance characteristics? A: MAL215957331E3 provides extended operational lifetime (5000 hours @ 105°C) and lowest ESR (300 mΩ), making it optimal for demanding thermal and ripple current applications. For cost-sensitive applications, SLP331M450H5P3 provides baseline equivalence with proven manufacturability from the original supplier.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 Compliant status and REACH Unaffected certification, meeting environmental regulatory requirements for commercial and industrial applications.

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