Equivalent & Substitute Parts for Rubycon 63ST684M4532X Film Capacitor

Part Overview

The Rubycon 63ST684M4532X is a 0.68 µF film capacitor rated for 63V DC with acrylic metallized dielectric construction in 1812 (4532 metric) surface mount package. This component is designed for DC link and DC filtering applications. The part is currently listed as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

63ST684M4532X

RubyconIn Stock: 90663ST684M4532X Datasheet

Current PartRFQ

63MU684M4532

RubyconIn Stock: 108763MU684M4532 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 63ST684M4532X is determined by strict equivalence across the following critical parameters:

• Capacitance value: 0.68 µF
• Tolerance: ±20%
• Voltage rating: 63V DC
• Dielectric material: Acrylic, Metallized
• Package: 1812 (4532 Metric)
• Physical dimensions: 0.177" L x 0.126" W, 0.063" max height
• Operating temperature range: -55°C to 125°C
• Termination: Solder Pads
• Compliance: ROHS3, REACH Unaffected

The Rubycon 63MU684M4532 meets all these criteria and qualifies as a parametric equivalent. The primary distinction is series designation (MU versus ST) and product status (active versus obsolete).

Parameter Comparison

Engineering Selection Recommendations

The Rubycon 63MU684M4532 is the direct parametric equivalent for the obsolete 63ST684M4532X. Both parts share identical electrical specifications, physical dimensions, and compliance certifications. The 63MU684M4532 maintains active product status, ensuring continued availability and supply chain reliability. The MU series designation represents a current production line within Rubycon's PMLCAP® film capacitor portfolio.

For new designs or production restarts, the 63MU684M4532 is the appropriate selection. For existing inventory management of the 63ST684M4532X, the 63MU684M4532 provides direct functional replacement without circuit redesign or PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the 63MU684M4532 be used as a direct replacement for the 63ST684M4532X?

A: Yes. Both parts are Rubycon PMLCAP® film capacitors with identical capacitance (0.68 µF), voltage rating (63V DC), tolerance (±20%), dielectric material (acrylic metallized), package (1812/4532 metric), and operating temperature range (-55°C to 125°C). No circuit modifications are required.

Q: What is the difference between the ST and MU series designations?

A: The ST series is obsolete; the MU series is active production. Both series use identical electrical and mechanical specifications for this capacitance and voltage rating.

Q: Are there packaging differences between these parts?

A: The 63ST684M4532X uses standard packaging, while the 63MU684M4532 is supplied in Tape & Reel (TR) format. Both are surface mount components with identical PCB footprints and solder pad configurations.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity level (MSL 5, 48 hours) and ECCN/HTSUS classifications.

Q: Can these parts be used interchangeably in DC link and DC filtering applications?

A: Yes. Both parts are rated for DC link and DC filtering applications with identical electrical performance across the specified operating temperature range.