Equivalent & Substitute Parts for 381LX331M350J052

Part Overview

The 381LX331M350J052 is a 330 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is designed for general-purpose applications requiring stable capacitance and extended operational life at elevated temperatures. The part maintains Active product status with 3000 hours lifetime rating at 105°C and operates across a temperature range of -25°C to 105°C.

Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, or meet specific application requirements while maintaining electrical and mechanical compatibility within the allowed parameter specifications.

Substiute Parts

381LX331M350J052

Cornell Dubilier Electronics (CDE)In Stock: 863381LX331M350J052 Datasheet

Current PartRFQ

450MXG330MEFCSN25X50

RubyconIn Stock: 273875450MXG330MEFCSN25X50 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 381LX331M350J052 are identified based on strict electrical and mechanical parameter alignment. The substitution logic is as follows:

Capacitance: Must equal 330 µF exactly. This is the primary functional parameter and cannot vary.

Voltage Rating: The substitute part must have a rated voltage equal to or greater than 350 V. A higher voltage rating (450 V) is acceptable as it provides additional safety margin and does not compromise circuit function.

Tolerance: Must be ±20% or tighter. Equivalent tolerance is acceptable.

Lifetime & Temperature: The substitute must maintain a minimum of 3000 hours at 105°C. Operating temperature range must encompass -25°C to 105°C.

Mechanical Compatibility: Lead spacing (10.00 mm), can diameter (25.00 mm), and seated height (52.00 mm) must match exactly to ensure PCB fit and snap-in mounting compatibility.

Package Type: Must be radial, can snap-in configuration with through-hole mounting.

Compliance: RoHS3 compliance is required; REACH Unaffected status is maintained.

The identified substitute, 450MXG330MEFCSN25X50 from Rubycon, meets all these criteria with an upgraded voltage rating of 450 V, providing enhanced performance margin while maintaining full mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: 381LX331M350J052 (CDE)

Select this part when the original design specification calls for a 350 V rated aluminum electrolytic capacitor from Cornell Dubilier Electronics. This part maintains Active product status and is available in inventory (762 pcs). It is suitable for applications where the exact manufacturer specification is required or where design validation has been completed with this specific component.

Substitute Part: 450MXG330MEFCSN25X50 (Rubycon)

The Rubycon MXG series substitute is electrically and mechanically compatible with the original 381LX part. The 450 V voltage rating provides a 100 V margin above the original 350 V specification, offering enhanced reliability in applications subject to voltage transients or where additional safety margin is desired. The higher ripple current ratings (1.82 A @ 120 Hz and 2.548 A @ 10 kHz) indicate improved thermal performance characteristics.

Both parts are ROHS3 compliant, REACH Unaffected, and maintain identical mechanical dimensions and mounting configurations. Selection between these parts should be based on:

• Availability and lead time requirements
• Manufacturer preference or qualification status
• Voltage margin requirements for the specific application
• Cost considerations

Frequently Asked Questions (FAQ)

Q: Can the 450MXG330MEFCSN25X50 be used as a direct replacement for the 381LX331M350J052?

A: Yes. Both parts have identical capacitance (330 µF), tolerance (±20%), operating temperature range (-25°C to 105°C), lifetime rating (3000 Hrs @ 105°C), and mechanical dimensions (10.00 mm lead spacing, 25.00 mm diameter, 52.00 mm height). The substitute features a higher voltage rating (450 V vs. 350 V) and higher ripple current ratings, which are compatible with the original design requirements.

Q: What is the significance of the higher 450 V voltage rating on the substitute part?

A: The 450 V rating on the Rubycon part provides a 100 V safety margin above the original 350 V specification. This higher rating does not change the component's function in a 350 V circuit but offers additional protection against voltage transients and extended operational margin. The component will operate identically to the original part in circuits designed for 350 V operation.

Q: Are the mechanical dimensions identical between these two parts?

A: Yes. Both parts have identical lead spacing (0.394" / 10.00 mm), can diameter (0.984" / 25.00 mm), and maximum seated height (2.047" / 52.00 mm). Both use through-hole mounting with radial, can snap-in packaging. No PCB layout modifications are required for substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 381LX331M350J052 and 450MXG330MEFCSN25X50 are ROHS3 compliant and REACH Unaffected. Both carry Moisture Sensitivity Level 1 (Unlimited) ratings, indicating no special moisture handling requirements during storage or assembly.

Q: What is the difference in ripple current ratings between these parts?

A: The Rubycon substitute has higher ripple current ratings: 1.82 A @ 120 Hz (vs. 1.2 A on the original) and 2.548 A @ 10 kHz (vs. 1.7 A @ 20 kHz on the original). These higher ratings indicate improved thermal performance and lower ESR characteristics, which may provide benefits in high-ripple-current applications, though both parts meet the same 3000-hour lifetime specification at 105°C.

Q: Can the original 381LX331M350J052 be substituted with a lower voltage rating part?

A: No. Substitute parts must have a voltage rating equal to or greater than 350 V. Using a part with a lower voltage rating would violate the electrical safety requirements of the original design and is not permitted.

Q: Are there any temperature range differences between these parts?

A: No. Both parts operate across the identical temperature range of -25°C to 105°C and maintain the same 3000-hour lifetime rating at 105°C.