35ST685M5750 Film Capacitor Equivalent & Substitute Parts

Part Overview

The 35ST685M5750 is a 6.8 µF film capacitor rated for 35V DC, manufactured by Rubycon under the PMLCAP® ST series. This surface mount component features acrylic metallized dielectric construction in a 2220 (5750 metric) package and is designed for DC link and DC filtering applications. The part is currently obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

35ST685M5750

RubyconIn Stock: 101235ST685M5750 Datasheet

Current PartRFQ

35MU685MD15750

RubyconIn Stock: 218535MU685MD15750 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 35ST685M5750 is based on strict electrical and mechanical parameter matching. The following criteria determine compatibility:

Electrical Parameters (Critical):

• Capacitance value: 6.8 µF (exact match required)
• Tolerance: ±20% (must match or be tighter)
• Voltage rating: 35V DC (minimum requirement; higher ratings acceptable)
• Dielectric material: Acrylic, Metallized (same material system)

Mechanical Parameters (Critical):

• Package type: 2220 (5750 Metric) surface mount
• Physical dimensions: 0.224" L x 0.197" W (5.70mm x 5.00mm)
• Height: 0.079" (2.00mm) maximum seated height
• Termination: Solder pads

Environmental & Compliance Parameters:

• Operating temperature range: -55°C ~ 125°C (minimum requirement)
• RoHS3 compliance required
• MSL rating: 5 (48 Hours)

The 35MU685MD15750 meets all these criteria and qualifies as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The 35MU685MD15750 is a direct parametric equivalent to the obsolete 35ST685M5750. Selection is based on the following factors:

Electrical Compatibility: Both parts share identical capacitance (6.8 µF), tolerance (±20%), voltage rating (35V DC), and dielectric material (acrylic, metallized). These parameters ensure functional equivalence in DC link and DC filtering applications.

Mechanical Compatibility: Identical package dimensions (2220/5750 metric), physical footprint (0.224" L x 0.197" W), and seated height (0.079" max) ensure direct PCB layout compatibility without redesign.

Environmental & Compliance Alignment: Both parts operate across the same temperature range (-55°C ~ 125°C), carry ROHS3 compliance certification, and share identical MSL ratings (5, 48 hours). These parameters confirm suitability for equivalent environmental and regulatory requirements.

Product Status Advantage: The 35MU685MD15750 maintains active product status with 2155 units in stock, providing reliable long-term availability compared to the obsolete 35ST685M5750.

Frequently Asked Questions (FAQ)

Q: Can the 35MU685MD15750 be used as a direct replacement for the 35ST685M5750?

A: Yes. Both parts are manufactured by Rubycon within the PMLCAP® product line and share identical electrical specifications (6.8 µF, ±20%, 35V DC), dielectric material (acrylic, metallized), mechanical dimensions (2220 package, 0.224" x 0.197" x 0.079" max), and environmental ratings (-55°C ~ 125°C). No circuit modifications or PCB redesign are required.

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

A: The ST and MU designations identify different product series within Rubycon's PMLCAP® film capacitor line. Both series meet identical electrical and mechanical specifications for this 6.8 µF, 35V application. The primary distinction is product status: ST series (35ST685M5750) is obsolete, while MU series (35MU685MD15750) is active.

Q: Are there any packaging differences between these parts?

A: The 35ST685M5750 packaging format is not specified in available data. The 35MU685MD15750 is supplied in Tape & Reel (TR) format, which is standard for surface mount film capacitors in this package class and suitable for automated assembly processes.

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

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, carry identical MSL ratings (5, 48 hours), and operate across the same temperature range (-55°C ~ 125°C). They meet equivalent regulatory and environmental requirements.

Q: What applications are these capacitors designed for?

A: Both the 35ST685M5750 and 35MU685MD15750 are specified for DC link and DC filtering applications, where their 6.8 µF capacitance and 35V rating provide energy storage and voltage stabilization in power conversion and distribution circuits.