SEK4R7M063ST Equivalent & Substitute Parts Reference

Part Overview

The SEK4R7M063ST is a 4.7 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 is designed for general-purpose applications requiring polar electrolytic capacitance in through-hole mounting configurations.

Substitute parts become necessary when the original SEK4R7M063ST reaches end-of-life inventory depletion, when design requirements permit higher voltage ratings, or when alternative manufacturers' stock availability offers supply chain advantages. The substitute identified in this reference maintains the core capacitance and tolerance specifications while offering modified electrical characteristics and physical dimensions.

Substiute Parts

SEK4R7M063ST

Cornell Dubilier Electronics (CDE)In Stock: 1079SEK4R7M063ST Datasheet

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UPW2A4R7MDD

NichiconIn Stock: 1377UPW2A4R7MDD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SEK4R7M063ST is based on the following allowed parameters:

Matching Parameters (Non-Negotiable):

• Capacitance: 4.7 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Operating Temperature Range: -55°C ~ 105°C (exact match required)
• Lifetime @ Temperature: 2000 Hrs @ 105°C (exact match required)
• Polarization: Polar (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can (exact match required)
• Lead Spacing: 0.079" (2.00mm) (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

Permissible Variation Parameters:

• Voltage - Rated: The substitute UPW2A4R7MDD is rated at 100 V, which exceeds the original 63 V specification. A higher voltage rating is an acceptable substitution parameter as it provides equal or greater electrical stress capability within the same circuit application.
• Physical Height: The substitute measures 0.433" (11.00mm) versus the original 0.512" (13.00mm), representing a dimensional reduction that does not compromise electrical function or PCB mounting compatibility.
• ESR and Ripple Current: These parameters differ between parts but remain within acceptable ranges for general-purpose applications.

The substitute part UPW2A4R7MDD meets all critical matching criteria while offering enhanced voltage rating capability.

Parameter Comparison

Engineering Selection Recommendations

Compliance and Regulatory Basis:

Both the SEK4R7M063ST and UPW2A4R7MDD maintain ROHS3 compliance, REACH unaffected status, and identical ECCN and HTSUS classifications. These regulatory alignments confirm that substitution does not introduce compliance complications.

Product Status Consideration:

The SEK4R7M063ST maintains Active product status with 1009 pieces in stock inventory. The substitute UPW2A4R7MDD is classified as Obsolete with 1318 pieces available. Selection between these parts should prioritize the Active status component (SEK4R7M063ST) for new designs and long-term supply chain stability. The Obsolete substitute should be reserved for legacy system maintenance or when original part availability becomes constrained.

Electrical Compatibility:

The UPW2A4R7MDD substitute operates at 100 V rated voltage compared to the original 63 V specification. This higher voltage rating does not create incompatibility; circuits designed for 63 V operation function correctly with 100 V-rated capacitors. The substitute's reduced ripple current at 120 Hz (22.2 mA versus 34 mA) represents a conservative characteristic suitable for general-purpose applications.

Physical Compatibility:

Both parts share identical lead spacing (0.079" / 2.00mm), diameter (0.197" / 5.00mm), and radial can package configuration. The substitute's reduced height (0.433" / 11.00mm versus 0.512" / 13.00mm) presents no mounting obstruction and may offer space advantages in compact layouts.

Frequently Asked Questions (FAQ)

Q: Can UPW2A4R7MDD replace SEK4R7M063ST in existing circuit designs?

A: Yes. The substitute maintains identical capacitance (4.7 µF), tolerance (±20%), operating temperature range (-55°C ~ 105°C), lifetime rating (2000 Hrs @ 105°C), and through-hole radial package configuration. The higher 100 V voltage rating does not create incompatibility with 63 V circuit applications.

Q: What is the significance of the voltage rating difference?

A: The substitute's 100 V rating exceeds the original 63 V specification. This represents a higher electrical stress capability and is an acceptable substitution parameter. Circuits operating at 63 V or lower voltages function correctly with 100 V-rated capacitors.

Q: Are there physical mounting differences between these parts?

A: Both parts feature identical lead spacing (0.079" / 2.00mm) and diameter (0.197" / 5.00mm), ensuring direct PCB compatibility. The substitute is physically shorter (0.433" versus 0.512" height), which may provide space advantages without compromising mounting integrity.

Q: Why is the substitute listed as Obsolete?

A: Product status reflects manufacturer lifecycle classification. The Obsolete designation for UPW2A4R7MDD indicates that Nichicon has discontinued active production. For new designs, the Active-status SEK4R7M063ST is the preferred selection. The substitute remains suitable for legacy system repairs where original parts are unavailable.

Q: Do the ripple current specifications affect substitution suitability?

A: Ripple current values differ between parts due to different measurement frequencies and ESR characteristics. The substitute's 22.2 mA @ 120 Hz is lower than the original 34 mA @ 120 Hz. For general-purpose applications, this represents a conservative characteristic. Applications with specific ripple current requirements should verify the substitute meets those criteria.

Q: Are regulatory and compliance certifications identical?

A: Yes. Both parts maintain ROHS3 compliance, REACH unaffected status, EAR99 ECCN classification, and identical HTSUS code (8532.22.0020). Substitution introduces no regulatory complications.

Q: What packaging format is available for each part?

A: The SEK4R7M063ST is available in standard packaging format. The UPW2A4R7MDD is supplied in Bulk packaging. Verify packaging requirements align with procurement and assembly processes before selection.