SEK331M063ST Equivalent & Substitute Parts

Part Overview

The SEK331M063ST is a 330 µF, 63 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as Active product status and serves general-purpose applications. Identifying equivalent and substitute parts is necessary to ensure supply chain continuity, optimize cost-effectiveness, and maintain performance specifications when the original part becomes unavailable or when design requirements necessitate enhanced operational characteristics such as extended lifetime or improved ripple current handling.

Substiute Parts

SEK331M063ST

Cornell Dubilier Electronics (CDE)In Stock: 1084SEK331M063ST Datasheet

Current PartRFQ

ELXZ630ELL331MK20S

Chemi-ConIn Stock: 6705ELXZ630ELL331MK20S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the SEK331M063ST is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 63 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Package Type: Radial, Can (exact match required)
• Mounting Configuration: Through Hole (exact match required)
• Lead Spacing: 0.197" (5.00mm) (exact match required)
• Operating Temperature Range: -55°C ~ 105°C minimum (exact match or broader range acceptable)

Secondary Enhancement Parameters (substitutes may exceed original specifications):

• Lifetime @ Temperature: 2000 Hrs @ 105°C (substitutes may offer extended lifetime)
• Ripple Current Capability: May be equal to or exceed original specifications
• ESR and Impedance: Lower values represent performance improvements

The substitute part ELXZ630ELL331MK20S meets all primary substitution criteria and offers enhanced secondary parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the SEK331M063ST and ELXZ630ELL331MK20S meet ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across global supply chains. The ELXZ630ELL331MK20S carries AEC-Q200 automotive qualification, indicating enhanced reliability validation through automotive-grade testing protocols. The substitute part demonstrates superior operational longevity with 7000 hours lifetime at 105°C compared to the original specification of 2000 hours, making it suitable for extended-life applications. The ELXZ630ELL331MK20S also exhibits improved high-frequency ripple current capability at 1.29 A @ 100 kHz, providing enhanced performance margin in switching power supply and high-frequency circuit applications. Both parts maintain equivalent footprint and lead spacing, ensuring direct physical compatibility.

Frequently Asked Questions (FAQ)

Q: Can ELXZ630ELL331MK20S replace SEK331M063ST in existing designs?

A: Yes. The substitute part maintains identical capacitance (330 µF), voltage rating (63 V), tolerance (±20%), operating temperature range (-55°C ~ 105°C), and physical package specifications (0.197" lead spacing, radial can configuration). Direct pin-to-pin replacement is mechanically and electrically compatible.

Q: What are the primary advantages of the ELXZ630ELL331MK20S substitute?

A: The substitute offers 3.5 times extended lifetime (7000 hours vs. 2000 hours at 105°C) and enhanced ripple current capability, particularly at high frequencies (1.29 A @ 100 kHz vs. 910 mA @ 10 kHz). AEC-Q200 automotive qualification provides additional reliability assurance.

Q: Are there any physical dimension differences between these parts?

A: Minor dimensional variations exist within acceptable through-hole assembly tolerances. The original part specifies 0.512" diameter with 0.827" maximum height; the substitute specifies 0.492" diameter with 0.846" maximum height. Both fit standard 5.00mm lead spacing PCB patterns without modification.

Q: What compliance standards apply to both parts?

A: Both parts comply with ROHS3 requirements and carry REACH Unaffected status, ensuring compliance with European Union environmental and chemical safety regulations. The substitute additionally holds AEC-Q200 automotive grade certification.

Q: Should I select the substitute for new designs?

A: The ELXZ630ELL331MK20S is appropriate for applications requiring extended operational life, high-frequency ripple current handling, or automotive-grade component qualification. Standard general-purpose applications may use either part based on availability and cost considerations.