SLPX331M385E7P3

Part Overview

The SLPX331M385E7P3 is a 330 µF 385 V aluminum electrolytic capacitor with radial, can-style snap-in mounting from Cornell Dubilier Electronics (CDE). This component is classified as Active product status and serves general-purpose applications requiring high-voltage energy storage and filtering. Substitute components become necessary when managing inventory constraints, optimizing ESR characteristics, extending operational lifetime, or accommodating enhanced temperature ratings beyond the base 385 V specification.

Key Parameters

Parameter	Value
Manufacturer Part Number	SLPX331M385E7P3
Manufacturer	Cornell Dubilier Electronics (CDE)
Series	SLPX
Capacitance	330 µF
Tolerance	±20%
Voltage - Rated	385 V
ESR (Equivalent Series Resistance)	603 mOhm @ 120 Hz
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-25°C ~ 85°C
Package / Case	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	1.181" Dia (30.00 mm)
Height - Seated (Max)	1.654" (42.00 mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the SLPX331M385E7P3 is governed by the following key electrical and mechanical compatibility parameters:

Electrical Parameters:

Capacitance: 330 µF (fixed requirement)
Tolerance: ±20% (fixed requirement)
Voltage Rating: Equal to or greater than 385 V
Operating Temperature Range: Must accommodate application requirements
Lifetime: 3000 Hrs minimum at rated temperature

Mechanical Parameters:

Package / Case: Radial, Can - Snap-In (mandatory for mechanical fit)
Lead Spacing: 0.394" (10.00 mm) (mandatory for PCB compatibility)
Size / Dimension: 1.181" Dia (30.00 mm) (mandatory for clearance)
Height - Seated (Max): 1.654" (42.00 mm) (mandatory for spatial constraints)
Mounting Type: Through Hole (mandatory for board assembly)

Substitute parts meeting these criteria are grouped into voltage-rated categories: 400 V, and 450 V. All substitutes maintain identical footprint and form factor specifications, ensuring drop-in compatibility.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage	ESR	Lifetime	Temp Range	Lead Spacing	Size Dia	Height Max	RoHS Status
SLPX331M385E7P3	Cornell Dubilier Electronics	330 µF	±20%	385 V	603 mOhm @ 120 Hz	3000 Hrs @ 85°C	-25°C ~ 85°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant
381LR331M400K042	Cornell Dubilier Electronics	330 µF	±20%	400 V	402 mOhm @ 120 Hz	3000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant
450MXG330MEFCSN30X40	Rubycon	330 µF	±20%	450 V	Not specified	3000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant
450VXH330MEFCSN30X40	Rubycon	330 µF	±20%	450 V	Not specified	5000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant
B43508B5337M000	EPCOS - TDK Electronics	330 µF	±20%	450 V	370 mOhm @ 100 Hz	3000 Hrs @ 105°C	-40°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant
B43644A5337M000	EPCOS - TDK Electronics	330 µF	±20%	450 V	90 mOhm @ 100 Hz	5000 Hrs @ 105°C	-40°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant
ELXS451VSN331MR40S	Chemi-Con	330 µF	±20%	450 V	Not specified	5000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant
LGN2W331MELB40	Nichicon	330 µF	±20%	450 V	Not specified	3000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant
LQS2W331MELB40	Nichicon	330 µF	±20%	450 V	Not specified	3000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute components for the SLPX331M385E7P3 are Active product status and ROHS3 Compliant, ensuring regulatory conformance and continued commercial availability.

400 V Rated Substitutes: The 381LR331M400K042 from Cornell Dubilier Electronics provides a rated voltage above the original 385 V specification with lower ESR (402 mOhm versus 603 mOhm) and extended temperature operation to 105°C.

450 V Rated Substitutes: The 450 V category includes components from Rubycon, EPCOS-TDK Electronics, Chemi-Con, and Nichicon. Within this category, the B43644A5337M000 exhibits the lowest ESR specification (90 mOhm @ 100 Hz) and extended lifetime rating (5000 Hrs @ 105°C). The 450VXH330MEFCSN30X40 and ELXS451VSN331MR40S also provide 5000 Hrs @ 105°C lifetime ratings. All 450 V alternatives operate across -25°C to 105°C or -40°C to 105°C temperature ranges, exceeding the original -25°C to 85°C specification.

Frequently Asked Questions (FAQ)

Q: Can the SLPX331M385E7P3 be replaced with a 450 V rated alternative? A: Yes. A higher voltage rating is compatible with applications designed for 385 V operation. The substitute capacitor withstands the same operational voltage stress with additional voltage margin.

Q: What is the significance of ESR (Equivalent Series Resistance) in capacitor substitution? A: ESR affects ripple current handling, heat dissipation, and circuit response characteristics. Lower ESR indicates improved high-frequency performance and reduced thermal generation. Specifications are measured at different frequencies (100 Hz versus 120 Hz), making direct comparison within the same measurement frequency necessary for precise assessment.

Q: Are all substitutes mechanically compatible with the original SLPX331M385E7P3? A: Yes. All listed substitutes maintain identical lead spacing (0.394" / 10.00 mm), mounting diameter (1.181" / 30.00 mm), maximum seated height (1.654" / 42.00 mm), and through-hole mounting type. Drop-in replacement on the PCB is guaranteed without board redesign.

Q: What is the difference between 3000 Hrs and 5000 Hrs lifetime ratings? A: The lifetime rating specifies the operational duration at maximum rated temperature before capacitance degradation and ESR increase reach specified limits. A 5000 Hrs rating provides extended operational life at elevated temperatures compared to 3000 Hrs, relevant for applications requiring long-term reliability.

Q: How does operating temperature range affect component selection? A: The original SLPX331M385E7P3 operates from -25°C to 85°C. Substitutes rated to 105°C support applications in higher ambient or internal temperature environments. The EPCOS-TDK components extend the lower temperature limit to -40°C for cold-environment applications.

Q: Which substitute offers the lowest ESR performance? A: The B43644A5337M000 specifies 90 mOhm ESR @ 100 Hz, the lowest among listed alternatives. This component is suitable for applications requiring superior ripple current handling and minimal thermal dissipation.

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