380LX331M450K052

Part Overview

The Cornell Dubilier Electronics 380LX331M450K052 is a 330 µF, 450 V aluminum electrolytic capacitor in radial, can format with snap-in mounting. This component is actively produced and maintains a robust inventory of 796 units. The part specification includes 550 mOhm equivalent series resistance at 120 Hz and a rated lifetime of 3000 hours at 85°C, making it suitable for general-purpose applications requiring high-voltage energy storage.

Finding equivalent and substitute parts is necessary to ensure supply chain continuity, optimize for specific application performance requirements such as enhanced temperature ratings or reduced impedance, and accommodate design flexibility across manufacturing partners.

Key Parameters

Parameter	380LX331M450K052 Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
ESR @ 120 Hz	550 mOhm
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-25°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)
Case Diameter	1.181" (30.00 mm)
Height (Seated Max)	2.047" (52.00 mm)
Mounting Type	Through Hole
Package	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant
Ripple Current @ 120 Hz	2 A
Ripple Current @ 20 kHz	2.8 A

Substitute Part Grouping Explanation

Substitution of the 380LX331M450K052 is permissible when the following criteria are maintained:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 330 µF (exact match required)
Voltage Rating: 450 V (minimum requirement)
Tolerance: ±20% or tighter
Polarization: Polar (same as primary part)

Mechanical Parameters (Required Match):

Lead Spacing: 0.394" (10.00 mm)
Package Type: Radial, Can - Snap-In
Mounting: Through Hole

Thermal & Performance Parameters (Application-Dependent):

Operating Temperature Range: must accommodate -25°C to 85°C minimum
ESR (Equivalent Series Resistance): acceptable range depends on ripple current capacity and heat dissipation requirements in the target circuit
Lifetime @ Temperature: acceptable if rated 3000 hours or greater at the operating temperature

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected status

Parts listed below are categorized as Direct (functionally equivalent), Upgrade (enhanced specifications), or Similar (minor dimensional variance but compatible footprint).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	ESR @ Test Frequency	Lifetime @ Temperature	Operating Temp Range	Case Dia / Height	Status
380LX331M450K052	Cornell Dubilier Electronics	330 µF	450 V	550 mOhm @ 120 Hz	3000 Hrs @ 85°C	-25°C ~ 85°C	1.181" / 2.047"	Active
381LR331M450K052	Cornell Dubilier Electronics	330 µF	450 V	402 mOhm @ 120 Hz	3000 Hrs @ 105°C	-25°C ~ 105°C	1.181" / 2.047"	Active
SLPX331M450E7P3	Cornell Dubilier Electronics	330 µF	450 V	804 mOhm @ 120 Hz	3000 Hrs @ 85°C	-25°C ~ 85°C	1.181" / 1.575"	Active
381LX331M450K052	Cornell Dubilier Electronics	330 µF	450 V	Not Specified	3000 Hrs @ 105°C	-25°C ~ 105°C	1.181" / 2.047"	Active
380LQ331M450A022	Cornell Dubilier Electronics	330 µF	450 V	600 mOhm @ 120 Hz	2000 Hrs @ 85°C	-25°C ~ 85°C	1.378" / 1.260"	Active
380LX331M450A042	Cornell Dubilier Electronics	330 µF	450 V	603 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	1.378" / 1.654"	Active
450USG330MEFCSN30X35	Rubycon	330 µF	450 V	Not Specified	3000 Hrs @ 85°C	-25°C ~ 85°C	1.181" / 1.457"	Active
B43504A5337M000	EPCOS - TDK Electronics	330 µF	450 V	410 mOhm @ 100 Hz	3000 Hrs @ 105°C	-40°C ~ 105°C	1.181" / 2.047"	Not For New Designs
B43509A5337M000	EPCOS - TDK Electronics	330 µF	450 V	300 mOhm @ 100 Hz	3000 Hrs @ 105°C	-40°C ~ 105°C	1.181" / 2.047"	Active
B43624A5337M000	EPCOS - TDK Electronics	330 µF	450 V	330 mOhm @ 100 Hz	8000 Hrs @ 85°C	-40°C ~ 85°C	1.181" / 2.047"	Active
LLS2W331MELB	Nichicon	330 µF	450 V	Not Specified	3000 Hrs @ 85°C	-25°C ~ 85°C	1.181" / 1.575"	Active

Engineering Selection Recommendations

Direct Substitutes (Functionally Equivalent):

381LR331M450K052 (Cornell Dubilier Electronics): Offers lower ESR (402 mOhm @ 120 Hz) and extended temperature rating to 105°C. RoHS3 compliant, Active status. Use where improved thermal performance and reduced impedance are beneficial.
SLPX331M450E7P3 (Cornell Dubilier Electronics): Maintains 3000-hour lifetime at 85°C with compact height (1.575"). RoHS3 compliant, Active status.
450USG330MEFCSN30X35 (Rubycon): Equivalent electrical and thermal specifications with compact height variant (1.457"). RoHS3 compliant, Active status.

Upgrade Substitutes (Enhanced Specifications):

381LX331M450K052 (Cornell Dubilier Electronics): Extended temperature rating to 105°C with 3000-hour lifetime. No ESR specification provided. RoHS3 compliant, Active status. Use where higher operating temperature tolerance is required.
B43624A5337M000 (EPCOS - TDK Electronics): Extended lifetime of 8000 hours at 85°C with low ESR (330 mOhm @ 100 Hz). RoHS3 compliant, Active status. Use in high-reliability applications requiring extended service life.
B43509A5337M000 (EPCOS - TDK Electronics): Lowest ESR (300 mOhm @ 100 Hz) with 3000-hour lifetime at 105°C. RoHS3 compliant, Active status. Use where minimal impedance is critical.

Similar Substitutes (Minor Dimensional Variance):

380LQ331M450A022 (Cornell Dubilier Electronics): Larger case diameter (1.378" vs 1.181") with shorter height (1.260"). Lower lifetime rating of 2000 hours at 85°C. Compatible footprint for applications with space constraints.
380LX331M450A042 (Cornell Dubilier Electronics): Larger case diameter (1.378") with mid-range height (1.654"). Maintains 3000-hour lifetime at 85°C. Compatible electrical specifications.

Legacy/Restricted Parts:

B43504A5337M000 (EPCOS - TDK Electronics): Designated "Not For New Designs". Use only in sustaining or retrofit applications where specification continuity is essential. RoHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can I substitute 380LX331M450K052 with a part having different capacitance? No. The capacitance value of 330 µF is a core electrical requirement. Substitution is limited to parts with identical capacitance ratings.

Q: What is the minimum acceptable voltage rating for a substitute? The substitute part must be rated for 450 V or higher. Parts with lower voltage ratings are not acceptable as they cannot safely operate in the circuit design.

Q: Are height and case diameter critical for substitution? Lead spacing (0.394" / 10.00 mm) and the radial, can snap-in package format are mandatory to ensure PCB footprint compatibility. Case diameter and height variations are permissible only if circuit layout and thermal clearance allow. Parts with significantly different dimensions may require board redesign.

Q: What does "RoHS3 Compliant" mean for substitution? RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the part meets environmental and materials regulations applicable to most regions. All listed substitute parts maintain this compliance level with the primary part.

Q: How does ESR (Equivalent Series Resistance) affect part selection? Lower ESR values reduce heat generation and improve circuit efficiency under ripple current loading. The 380LX331M450K052 has 550 mOhm @ 120 Hz. Substitute parts with lower ESR (such as B43509A5337M000 at 300 mOhm) provide performance advantages; parts with higher ESR may require thermal analysis to confirm acceptability in the application circuit.

Q: Can I use a part with "Not For New Designs" status? Parts marked "Not For New Designs" (such as B43504A5337M000) are suitable only for sustaining existing products or retrofitting legacy equipment. They are not recommended for incorporation into new circuit designs due to manufacturer discontinuation plans.

Q: What is the significance of different operating temperature ranges? The primary part operates from -25°C to 85°C. Substitutes with extended ranges (such as -40°C to 105°C) offer broader applicability across diverse environmental conditions. The part must accommodate the minimum temperature range of your application; extended ranges provide design margin without penalty.

Q: How do I determine if a substitute's lifetime rating is acceptable? Lifetime ratings are specified at a reference temperature (typically 85°C or 105°C). The primary part is rated for 3000 hours at 85°C. Substitutes with equal or higher lifetime ratings at the same or higher temperature are directly acceptable. Parts with lower lifetime ratings may require application analysis to confirm suitability based on expected service duration and thermal profile.

Q: What is the difference between "Direct," "Upgrade," and "Similar" substitute categories? Direct substitutes offer equivalent electrical and mechanical performance with the same or better ESR and lifetime ratings. Upgrade substitutes provide enhanced specifications such as extended temperature ratings or longer lifetime. Similar substitutes maintain core electrical compatibility but feature dimensional variations that may require board layout review.

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