380LX331M400A022 Equivalent & Substitute Parts

Part Overview

The 380LX331M400A022 is a 330 µF, 400 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is rated for general-purpose applications with an operating temperature range of -25°C to 85°C and a lifetime specification of 3000 hours at 85°C. The part maintains Active product status and is ROHS3 compliant.

Equivalent and substitute parts are identified based on matching or exceeding critical electrical and mechanical parameters: capacitance value, voltage rating, package type, lead spacing, and physical dimensions. Substitutes may vary in equivalent series resistance (ESR), ripple current ratings, and thermal lifetime specifications while maintaining functional compatibility within the specified parameter tolerances.

Key Parameters

Parameter	380LX331M400A022
Capacitance	330 µF
Tolerance	±20%
Voltage - Rated	400 V
ESR @ 120Hz	550 mOhm
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-25°C ~ 85°C
Ripple Current @ 120 Hz	1.9 A
Ripple Current @ 20 kHz	2.7 A
Lead Spacing	0.394" (10.00 mm)
Diameter	1.378" (35.00 mm)
Height - Seated (Max)	1.260" (32.00 mm)
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on substitution relationship and parameter compatibility:

Direct Substitutes maintain identical or equivalent electrical and mechanical specifications, allowing drop-in replacement without circuit redesign:

Same capacitance (330 µF) and voltage rating (400 V)
Identical package type (Radial, Can - Snap-In)
Matching lead spacing (10.00 mm) and physical footprint dimensions
Compatible operating temperature range and thermal lifetime

Similar Substitutes share core electrical parameters but differ in secondary specifications such as physical dimensions or ESR characteristics:

Identical capacitance and voltage rating
Same package type and lead spacing
Variations in can diameter or height that may affect board layout
Different ESR or ripple current ratings within acceptable operating margins

Upgrade Substitutes exceed the performance specifications of the original part while maintaining electrical and mechanical compatibility:

Same or higher voltage rating
Extended thermal lifetime or higher maximum operating temperature
Improved ESR characteristics or ripple current capacity
Enhanced reliability for demanding applications

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	ESR @ Frequency	Lifetime @ Temp	Operating Temp Range	Diameter	Height	Product Status
380LX331M400A022	CDE	330 µF	400 V	550 mOhm @ 120Hz	3000 Hrs @ 85°C	-25°C ~ 85°C	1.378" (35.00 mm)	1.260" (32.00 mm)	Active
380LQ331M400A012	CDE	330 µF	400 V	603 mOhm @ 120Hz	2000 Hrs @ 85°C	-25°C ~ 85°C	1.378" (35.00 mm)	1.063" (27.00 mm)	Active
381LR331M400A022	CDE	330 µF	400 V	402 mOhm @ 120Hz	3000 Hrs @ 105°C	-25°C ~ 105°C	1.378" (35.00 mm)	1.260" (32.00 mm)	Active
380LQ331M400K022	CDE	330 µF	400 V	603 mOhm @ 120Hz	2000 Hrs @ 85°C	-25°C ~ 85°C	1.181" (30.00 mm)	1.260" (32.00 mm)	Active
B43501C9337M000	EPCOS - TDK Electronics	330 µF	400 V	200 mOhm @ 100Hz	10000 Hrs @ 85°C	-40°C ~ 85°C	1.378" (35.00 mm)	1.260" (32.00 mm)	Not For New Designs
LLS2G331MELC	Nichicon	330 µF	400 V	Not Specified	3000 Hrs @ 85°C	-25°C ~ 85°C	1.378" (35.00 mm)	1.181" (30.00 mm)	Active
B43254C9337M000	EPCOS - TDK Electronics	330 µF	400 V	Not Specified	3000 Hrs @ 105°C	-25°C ~ 105°C	1.378" (35.00 mm)	1.260" (32.00 mm)	Not For New Designs
B43634C5337M000	EPCOS - TDK Electronics	330 µF	450 V	340 mOhm @ 100Hz	8000 Hrs @ 85°C	-25°C ~ 85°C	1.378" (35.00 mm)	1.260" (32.00 mm)	Active
LQSW6331MELC30	Nichicon	330 µF	420 V	Not Specified	3000 Hrs @ 105°C	-25°C ~ 105°C	1.378" (35.00 mm)	1.260" (32.00 mm)	Active

Engineering Selection Recommendations

Direct Substitutes for Drop-In Replacement:

The 381LR331M400A022 (CDE) is the primary direct substitute. It maintains identical physical dimensions (1.378" diameter, 1.260" height), lead spacing (10.00 mm), and capacitance/voltage specifications. The 381LR series offers improved ESR performance (402 mOhm vs. 550 mOhm) and extended operating temperature range (-25°C to 105°C vs. -25°C to 85°C). Both parts are Active status and ROHS3 compliant, ensuring long-term availability and regulatory compliance.

The 380LQ331M400A012 (CDE) is compatible but features reduced thermal lifetime (2000 Hrs @ 85°C vs. 3000 Hrs) and slightly increased ESR (603 mOhm). Physical height is reduced to 1.063", which may provide board layout advantages in space-constrained applications. This part remains suitable for general-purpose applications with standard thermal requirements.

Upgrade Substitutes for Enhanced Performance:

The LQSW6331MELC30 (Nichicon) provides superior thermal performance with 3000-hour lifetime at 105°C operating temperature, compared to the original 3000-hour lifetime at 85°C. Voltage rating is increased to 420 V, providing additional safety margin. This part is recommended for applications requiring extended thermal stability or operation in elevated ambient temperature environments. Active product status ensures continued availability.

The B43634C5337M000 (EPCOS - TDK Electronics) offers 450 V voltage rating with improved ESR (340 mOhm @ 100Hz) and extended thermal lifetime (8000 Hrs @ 85°C). Physical dimensions match the original part exactly. This upgrade is suitable for high-reliability applications or circuits requiring voltage derating margins. Active product status confirms ongoing manufacturing support.

Compatibility Considerations:

All substitute parts maintain identical lead spacing (10.00 mm) and radial, can snap-in package configuration, ensuring mechanical compatibility with existing PCB footprints. Physical diameter remains constant at 1.378" (35.00 mm) across primary substitutes, with height variations noted for specific alternatives. Electrical parameters (capacitance, tolerance, voltage rating) are matched or exceeded across all listed substitutes, maintaining circuit functionality.

Parts designated "Not For New Designs" (B43501C9337M000, B43254C9337M000) are suitable for replacement in existing equipment but should not be selected for new circuit designs due to obsolescence trajectory.

Frequently Asked Questions (FAQ)

Q: Can the 380LQ331M400A012 replace the 380LX331M400A022 in all applications?

A: The 380LQ331M400A012 is mechanically and electrically compatible for general-purpose applications. However, it features reduced thermal lifetime (2000 Hrs @ 85°C vs. 3000 Hrs) and increased ESR (603 mOhm vs. 550 mOhm). Applications requiring the full 3000-hour thermal rating or lower ESR performance should use the 381LR331M400A022 or LQSW6331MELC30 instead. Physical height is also reduced (1.063" vs. 1.260"), which may affect board layout.

Q: What is the difference between the 380LX and 381LR series?

A: Both series are manufactured by CDE and share identical physical dimensions and electrical ratings (330 µF, 400 V). The 381LR series provides improved ESR performance (402 mOhm vs. 550 mOhm) and extended operating temperature range (-25°C to 105°C vs. -25°C to 85°C). The 381LR maintains the same 3000-hour thermal lifetime at its maximum operating temperature (105°C). The 381LR is the recommended upgrade for applications requiring lower impedance or higher temperature operation.

Q: Why is the B43501C9337M000 marked "Not For New Designs"?

A: The B43501C9337M000 is designated "Not For New Designs" due to obsolescence planning by the manufacturer. While this part offers excellent performance characteristics (200 mOhm ESR, 10000-hour lifetime @ 85°C), it should only be used for replacement in existing equipment. New circuit designs should specify Active-status alternatives such as the 381LR331M400A022, LQSW6331MELC30, or B43634C5337M000.

Q: Can I use the B43634C5337M000 (450 V) in place of the 380LX331M400A022 (400 V)?

A: Yes. The B43634C5337M000 is a direct mechanical and electrical substitute with higher voltage rating (450 V vs. 400 V). The increased voltage rating provides additional safety margin and derating capability. Physical dimensions, lead spacing, and capacitance are identical. ESR is improved (340 mOhm vs. 550 mOhm), and thermal lifetime is extended (8000 Hrs @ 85°C vs. 3000 Hrs). This part is recommended for applications requiring enhanced reliability or voltage margin.

Q: What are the physical dimension differences between substitute parts?

A: Most substitutes maintain the original diameter of 1.378" (35.00 mm) and height of 1.260" (32.00 mm). Exceptions include: 380LQ331M400A012 with reduced height of 1.063" (27.00 mm), 380LQ331M400K022 with reduced diameter of 1.181" (30.00 mm), and LLS2G331MELC with reduced height of 1.181" (30.00 mm). Verify PCB footprint and clearance requirements before selecting parts with modified dimensions.

Q: Is the LQSW6331MELC30 suitable for high-temperature applications?

A: Yes. The LQSW6331MELC30 is specifically designed for elevated temperature operation with 3000-hour lifetime at 105°C maximum operating temperature, compared to the original part's 85°C maximum. Operating temperature range extends to -25°C to 105°C. This part is recommended for applications in thermal environments or equipment requiring extended operational life at elevated ambient temperatures. Active product status ensures continued availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring regulatory compatibility with current environmental standards. REACH status is "REACH Unaffected" across all parts, confirming no restricted substances are present.

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