SK331M063ST Equivalent & Substitute Parts

Part Overview

The SK331M063ST is a 330 µF, 63 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can package format. This component is classified as Active status and serves general-purpose applications requiring stable capacitance performance across industrial temperature ranges. The identification of substitute parts becomes necessary when the primary manufacturer part reaches end-of-life status, when supply constraints occur, or when design requirements call for enhanced voltage margins or performance characteristics while maintaining functional compatibility.

Substiute Parts

SK331M063ST

Cornell Dubilier Electronics (CDE)In Stock: 1239SK331M063ST Datasheet

Current PartRFQ

UVR2A331MHD

NichiconIn Stock: 1446UVR2A331MHD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The UVR2A331MHD (Nichicon) functions as an equivalent substitute for the SK331M063ST based on the following matching parameters:

Primary Compatibility Criteria:

• Capacitance: 330 µF (identical)
• Tolerance: ±20% (identical)
• Operating Temperature Range: -40°C ~ 85°C (identical)
• Polarization: Polar (identical)
• Mounting Type: Through Hole (identical)
• Package / Case: Radial, Can (identical)
• Lead Spacing: 0.197" (5.00mm) (identical)
• Lifetime @ Temperature: 2000 Hrs @ 85°C (identical)
• RoHS Status: ROHS3 Compliant (identical)
• REACH Status: REACH Unaffected (identical)

Voltage Consideration: The UVR2A331MHD carries a rated voltage of 100 V, which exceeds the 63 V requirement of the original part. This higher voltage rating provides increased safety margins in applications requiring the SK331M063ST, as the electrical performance remains compatible within lower operating voltage scenarios.

Physical Dimension Variance: Minor variations exist in the physical envelope: the substitute part measures 0.492" Dia (12.50mm) versus 0.512" Dia (13.00mm) for the main part, and 0.984" (25.00mm) height versus 0.906" (23.00mm). These dimensional differences require PCB layout verification to confirm mounting clearance compatibility.

Parameter Comparison

Engineering Selection Recommendations

SK331M063ST Selection: The SK331M063ST is appropriate for new designs requiring a certified Active status component with full technical specifications including ESR ratings. This part is suitable for applications where manufacturer support and documented performance parameters are required throughout the product lifecycle.

UVR2A331MHD Selection: The UVR2A331MHD carries "Not For New Designs" status, classifying it as suitable for legacy system support, field repairs, or replacement applications only. This component offers a 100 V rated voltage specification, providing a higher safety margin than the original 63 V rating. The elevated voltage rating maintains electrical compatibility with the primary part in circuits designed for 63 V operation. Selection of this substitute is appropriate when design retrofit or spare component provisioning is required, provided physical envelope clearance is confirmed during PCB layout verification. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the UVR2A331MHD directly replace the SK331M063ST in existing designs? A: The UVR2A331MHD maintains electrical equivalence for the core functional parameters: identical capacitance (330 µF), tolerance (±20%), operating temperature range (-40°C ~ 85°C), polarization, lead spacing, and lifetime rating (2000 Hrs @ 85°C). Physical dimensions require PCB layout verification—the substitute measures 0.492" diameter (versus 0.512") and 0.984" height (versus 0.906"). Direct substitution is feasible when mounting clearance permits the dimensional variance.

Q: What is the significance of the voltage rating difference? A: The UVR2A331MHD is rated for 100 V versus the SK331M063ST's 63 V rating. The higher voltage specification of the substitute provides increased electrical safety margin. In applications where the circuit operates below 63 V, the 100 V rated part operates with reduced electrical stress, which is electrically equivalent and functionally compatible.

Q: Does the "Not For New Designs" status affect substitution validity? A: The UVR2A331MHD's "Not For New Designs" classification indicates the manufacturer restricts this part for new product development. It remains fully functional for field replacements, legacy system support, and repair applications. For new design implementations, the SK331M063ST (Active status) is the recommended selection.

Q: Are there any ripple current differences I should consider? A: Both parts are rated for 2000 Hrs @ 85°C lifetime. The UVR2A331MHD demonstrates higher ripple current ratings: 760 mA @ 120 Hz and 1.14 A @ 10 kHz, compared to the SK331M063ST's 680 mA @ 120 Hz and 884 mA @ 1 kHz. The substitute part accommodates higher ripple current conditions while maintaining the same lifetime specification.

Q: Are both parts compliant with environmental regulations? A: Both the SK331M063ST and UVR2A331MHD maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and hazardous substance regulations.

Q: What packaging format is used for these components? A: Both parts employ through-hole radial, can package format with 0.197" (5.00mm) lead spacing, suitable for conventional PCB assembly processes and hand soldering applications.