Rubycon 25ST335MC14532 Film Capacitor Equivalent & Substitute Parts

Part Overview

The Rubycon 25ST335MC14532 is a 3.3 µF film capacitor rated for 25V DC applications with acrylic metallized dielectric construction in 1812 (4532 metric) surface mount package. This component is designed for DC link and DC filtering applications requiring stable capacitance performance across the operating temperature range of -55°C to 125°C.

The 25ST335MC14532 carries an obsolete product status. Locating equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications currently utilizing this component.

Substiute Parts

25ST335MC14532

RubyconIn Stock: 88325ST335MC14532 Datasheet

Current PartRFQ

25MU335MC14532

RubyconIn Stock: 74025MU335MC14532 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 25ST335MC14532 is determined by strict equivalence across the following critical parameters:

• Capacitance value: 3.3 µF
• Tolerance: ±20%
• Voltage rating: 25V DC minimum
• Dielectric type: Acrylic, Metallized
• Package: 1812 (4532 Metric) surface mount
• Operating temperature range: -55°C to 125°C minimum
• Termination: Solder pads

The substitute part 25MU335MC14532 meets all these criteria, differing only in series designation (MU versus ST) and product status (active versus obsolete). Both parts are manufactured by Rubycon and share identical electrical and mechanical specifications within the allowed tolerance parameters.

Parameter Comparison

Engineering Selection Recommendations

The 25MU335MC14532 serves as a direct functional equivalent to the obsolete 25ST335MC14532. Both parts maintain identical electrical performance specifications and are manufactured by Rubycon under the PMLCAP® series designation.

Selection of the 25MU335MC14532 is supported by:

• Active product status ensuring ongoing availability and supply chain support
• Full compliance with ROHS3 and REACH regulatory requirements
• Identical capacitance, voltage rating, tolerance, and dielectric composition
• Matching operating temperature range and application suitability
• Equivalent moisture sensitivity classification and handling requirements

The maximum seated height difference of 0.008" (0.20mm) between the two parts remains within typical PCB assembly tolerances for surface mount components and does not impact functional performance in DC link and DC filtering applications.

Frequently Asked Questions (FAQ)

Q: Can the 25MU335MC14532 be used as a direct replacement for the 25ST335MC14532?

A: Yes. Both parts share identical electrical specifications including capacitance (3.3 µF), voltage rating (25V DC), tolerance (±20%), dielectric material (acrylic, metallized), and package dimensions (1812 / 4532 metric). The primary difference is product status: the 25MU335MC14532 is active while the 25ST335MC14532 is obsolete.

Q: What is the significance of the series designation difference (ST versus MU)?

A: The series designation indicates the product line within Rubycon's PMLCAP® family. The MU series represents the current active production line, while the ST series has been discontinued. Both series maintain equivalent electrical and mechanical specifications for this capacitance and voltage rating.

Q: Are there any height clearance concerns when substituting the 25MU335MC14532?

A: The 25MU335MC14532 has a maximum seated height of 0.063" (1.60mm) compared to 0.055" (1.40mm) for the 25ST335MC14532, representing a 0.008" (0.20mm) increase. This difference is within standard PCB assembly tolerances and does not affect functionality in typical DC link and DC filtering applications.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the 25ST335MC14532 and 25MU335MC14532 are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 5, 48 hours). They meet the same environmental and regulatory requirements.

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

A: The 25MU335MC14532 is supplied in Tape & Reel (TR) packaging, which is standard for surface mount component distribution and automated assembly processes.