Equivalent & Substitute Parts for SEK4R7M350ST

Part Overview

The SEK4R7M350ST is a 4.7 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, can package configuration. This component is classified as Active product status and is designed for general purpose applications requiring through-hole mounting. The part is ROHS3 compliant and REACH unaffected, meeting current environmental standards. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when design requirements necessitate alternative electrical or mechanical characteristics within acceptable parameters.

Substiute Parts

SEK4R7M350ST

Cornell Dubilier Electronics (CDE)In Stock: 1087SEK4R7M350ST Datasheet

Current PartRFQ

400LLE4.7MEFCT810X12.5

RubyconIn Stock: 3528400LLE4.7MEFCT810X12.5 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SEK4R7M350ST are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility:

• Capacitance value: 4.7 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage rating: Equal to or greater than 350 V
• Polarization: Polar (exact match required)
• Operating temperature range: -40°C ~ 105°C minimum (exact match required)

Mechanical Compatibility:

• Mounting type: Through Hole (exact match required)
• Package / Case: Radial, Can (exact match required)
• Lead spacing: 5.00 mm (exact match required)
• Size / Dimension: 10.00 mm diameter (exact match required)

Compliance & Standards:

• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)
• REACH Status: REACH Unaffected (exact match required)

The substitute part 400LLE4.7MEFCT810X12.5 meets all mandatory electrical and mechanical parameters. The voltage rating of 400 V exceeds the minimum requirement of 350 V, providing additional design margin. Physical dimensions remain compatible with the original PCB layout and mounting specifications.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 400LLE4.7MEFCT810X12.5 (Rubycon LLE series) is electrically and mechanically compatible with the SEK4R7M350ST. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements for component selection.

The substitute part provides a 400 V rated voltage compared to the original 350 V specification. This higher voltage rating does not create incompatibility; rather, it provides additional design margin for voltage transient protection. The physical height difference of 1.00 mm (14.00 mm versus 13.00 mm) is within typical PCB layout tolerances for through-hole radial capacitors and does not affect mechanical fit or electrical performance.

Both parts are classified as Active product status, ensuring continued availability and manufacturing support. Selection between these parts should be based on inventory availability, lead time requirements, and cost considerations, as all electrical and mechanical parameters remain compatible.

Frequently Asked Questions (FAQ)

Q: Can the 400LLE4.7MEFCT810X12.5 be used as a direct replacement for the SEK4R7M350ST?

A: Yes. The substitute part meets all mandatory electrical parameters (capacitance, tolerance, polarization, operating temperature range) and mechanical parameters (lead spacing, diameter, mounting type, package configuration). The higher voltage rating (400 V versus 350 V) is compatible with the original design.

Q: Does the 1.00 mm height difference affect PCB layout?

A: No. The substitute part height of 14.00 mm versus the original 13.00 mm is within standard tolerances for through-hole radial capacitor mounting. PCB clearance and component spacing should be verified during design review, but this minor difference does not typically create layout conflicts.

Q: Are both parts compliant with current environmental standards?

A: Yes. Both the SEK4R7M350ST and 400LLE4.7MEFCT810X12.5 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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

A: The 400 V rating on the substitute part provides additional design margin compared to the 350 V original specification. This does not create incompatibility; it allows the substitute part to operate safely in circuits with higher voltage transients or margin requirements.

Q: Are the lead spacing and diameter identical between both parts?

A: Yes. Both parts feature 5.00 mm lead spacing and 10.00 mm diameter, ensuring identical PCB footprint compatibility and mounting hole alignment.

Q: Can these parts be used interchangeably in production?

A: Yes, provided that inventory and supply chain considerations are addressed. Both parts are Active status with established manufacturing support. Component selection should follow your organization's engineering change control procedures.