381EL331M315J052 Equivalent & Substitute Parts

Part Overview

The 381EL331M315J052 is a 330 µF, 315 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 high-voltage energy storage and filtering. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and ensure supply chain availability.

Substiute Parts

381EL331M315J052

Cornell Dubilier Electronics (CDE)In Stock: 1030381EL331M315J052 Datasheet

Current PartRFQ

ELXM3B1VSN331MQ40S

Chemi-ConIn Stock: 745ELXM3B1VSN331MQ40S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 381EL331M315J052 is based on strict equivalence of the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Capacitance value: 330 µF (exact match required)
• Voltage rating: 315 V (minimum acceptable)
• Tolerance: ±20% (matching specification)
• Operating temperature range: -25°C ~ 105°C (minimum required)
• Lifetime rating: 7000 Hrs @ 105°C (minimum acceptable)
• Polarization: Polar (required for application compatibility)

Mechanical Equivalence Criteria:

• Package type: Radial, Can - Snap-In (form factor requirement)
• Mounting type: Through Hole (PCB interface requirement)
• Lead spacing: 0.394" (10.00mm) (board layout compatibility)
• Diameter: 25.00mm nominal (physical fit requirement)

The substitute part ELXM3B1VSN331MQ40S from Chemi-Con meets all electrical and mechanical equivalence criteria and is classified as active product status.

Parameter Comparison

Engineering Selection Recommendations

The ELXM3B1VSN331MQ40S from Chemi-Con is a direct functional equivalent to the obsolete 381EL331M315J052. Both components satisfy identical electrical specifications for capacitance, voltage rating, tolerance, and thermal performance. Both parts maintain ROHS and REACH compliance, ensuring regulatory alignment for new designs and production continuity.

The Chemi-Con substitute exhibits a reduced height profile (1.654" versus 1.969") while maintaining the same lead spacing and diameter within acceptable mechanical tolerances. This dimensional difference does not preclude direct substitution in through-hole applications where the snap-in package format is utilized.

The active product status of the ELXM3B1VSN331MQ40S ensures long-term supply availability and manufacturing continuity, eliminating obsolescence risk associated with the original CDE component.

Frequently Asked Questions (FAQ)

Q: Can the ELXM3B1VSN331MQ40S be used as a direct replacement for the 381EL331M315J052?

A: Yes. Both components share identical electrical specifications: 330 µF capacitance, 315 V voltage rating, ±20% tolerance, and 7000 Hrs @ 105°C lifetime. Both utilize the same radial snap-in package with 0.394" (10.00mm) lead spacing and through-hole mounting, ensuring PCB compatibility.

Q: What is the significance of the height difference between these parts?

A: The Chemi-Con substitute is 0.315" (8.00mm) shorter in seated height. This dimensional reduction does not affect electrical performance or snap-in package functionality. Verify available clearance in the application enclosure to confirm physical fit.

Q: Are there compliance differences between the two parts?

A: Both components are RoHS compliant and REACH unaffected. The original part carries ROHS3 certification while the substitute carries standard RoHS certification. Both meet regulatory requirements for industrial and commercial applications.

Q: Why is the original part classified as obsolete?

A: The 381EL331M315J052 is no longer manufactured by Cornell Dubilier Electronics. The Chemi-Con ELXM3B1VSN331MQ40S remains in active production, providing equivalent performance with assured supply continuity.

Q: Are there differences in ripple current ratings?

A: The substitute part exhibits higher ripple current capacity at both low frequency (1.4 A @ 120 Hz versus 1.2 A @ 120 Hz) and high frequency (2.002 A @ 50 kHz versus 1.68 A @ 20 kHz). This represents improved performance characteristics in the substitute component.