Rubycon 25ST685MC44532 Film Capacitor Equivalent & Substitute Parts

Part Overview

The Rubycon 25ST685MC44532 is a 6.8 µF film capacitor rated for 25V DC applications, featuring acrylic metallized dielectric construction in a 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 suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

25ST685MC44532

RubyconIn Stock: 115425ST685MC44532 Datasheet

Current PartRFQ

25MU685MC44532

RubyconIn Stock: 96125MU685MC44532 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 25ST685MC44532 is determined by strict equivalence across the following critical parameters:

• Capacitance value: 6.8 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage rating: 25V DC (exact match required)
• Dielectric material: Acrylic, Metallized (exact match required)
• Package / Case: 1812 (4532 Metric) (exact match required)
• Operating temperature range: -55°C ~ 125°C (exact match required)
• Mounting type: Surface Mount (exact match required)
• Termination: Solder Pads (exact match required)

The substitute part 25MU685MC44532 meets all these criteria and is classified as a direct equivalent within the Rubycon PMLCAP® product family.

Parameter Comparison

Engineering Selection Recommendations

The 25MU685MC44532 is the direct substitute for the obsolete 25ST685MC44532. Both parts are manufactured by Rubycon and share identical electrical specifications, dielectric composition, and thermal operating range. The substitute part maintains active product status, ensuring long-term availability and supply chain continuity.

Both parts carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use. The primary difference between the two parts is the series designation (ST versus MU) and packaging format (standard versus Tape & Reel). The substitute part exhibits a maximum seated height of 0.110" (2.80mm) compared to 0.102" (2.60mm) for the original part, a difference of 0.008" (0.20mm) that must be evaluated within the context of specific PCB layout constraints and available clearance.

Frequently Asked Questions (FAQ)

Q: Can the 25MU685MC44532 be used as a direct replacement for the 25ST685MC44532?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters: capacitance, voltage rating, tolerance, dielectric material, package type, and operating temperature range. The substitute part is manufactured by the same supplier and carries identical compliance certifications.

Q: What is the significance of the series designation change from ST to MU?

A: The series designation indicates the product line within the Rubycon PMLCAP® family. The MU series represents the active continuation of the ST series. Both series employ identical acrylic metallized dielectric technology and meet the same electrical and thermal specifications.

Q: Does the 0.008" (0.20mm) height difference affect PCB compatibility?

A: The height difference must be evaluated within the specific PCB design context. The substitute part's maximum seated height of 0.110" (2.80mm) is slightly greater than the original 0.102" (2.60mm). Verify that available vertical clearance on the PCB accommodates this dimension before implementation.

Q: Are there any differences in moisture sensitivity or handling requirements?

A: No. Both parts carry identical Moisture Sensitivity Level (MSL) ratings of 5 (48 Hours), requiring the same storage, handling, and reflow procedures.

Q: What packaging options are available for the substitute part?

A: The 25MU685MC44532 is supplied in Tape & Reel (TR) format, which is standard for high-volume production environments. The original part was supplied in standard packaging. Confirm that your assembly process is compatible with Tape & Reel packaging.