SK100M350ST Equivalent & Substitute Parts

Part Overview

The SK100M350ST is a 10 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, through-hole configuration. This capacitor is designed for general-purpose applications requiring stable capacitance and reliable performance across industrial temperature ranges. The part is currently Active in product status with 716 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when design requirements permit alternative specifications within the same functional category.

Substiute Parts

SK100M350ST

Cornell Dubilier Electronics (CDE)In Stock: 787SK100M350ST Datasheet

Current PartRFQ

350PX10MEFC10X16

RubyconIn Stock: 926350PX10MEFC10X16 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of aluminum electrolytic capacitors is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance value: 10 µF (exact match required)
• Voltage rating: 350 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Mounting type: Through Hole (exact match required)
• Package configuration: Radial, Can (exact match required)
• Lead spacing: 0.197" (5.00mm) (exact match required)
• Can diameter: 0.394" (10.00mm) (exact match required)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

Allowable Variation Parameters:

• Height - Seated (Max): Variation permitted within physical board layout constraints
• ESR (Equivalent Series Resistance): Variation permitted based on application ripple current requirements
• Lifetime @ Temperature: Variation permitted based on operating environment
• Operating Temperature range: Variation permitted if application requirements are met
• Ripple Current ratings: Variation permitted if application requirements are met

The substitute part 350PX10MEFC10X16 (Rubycon PX series) satisfies all mandatory matching parameters and is therefore classified as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SK100M350ST (CDE)

Selection criteria: Use the SK100M350ST when CDE supply chain availability is confirmed and operating temperature requirements do not exceed 85°C. This part carries Active product status with established inventory (716 units in stock) and meets all ROHS3 and REACH compliance requirements.

Substitute Part: 350PX10MEFC10X16 (Rubycon)

Selection criteria: The 350PX10MEFC10X16 is a direct functional equivalent suitable for applications where:

• Operating temperature range extends to 105°C (superior to primary part specification of 85°C maximum)
• Extended temperature lifetime rating of 2000 Hrs @ 105°C is required
• Higher ripple current capacity (95 mA @ 120 Hz and 142.5 mA @ 10 kHz) is beneficial
• Physical height reduction from 23.00mm to 18.00mm accommodates space-constrained board layouts
• CDE supply becomes unavailable

Both parts maintain identical electrical specifications (10 µF, 350 V, ±20% tolerance), identical mechanical footprint (lead spacing 5.00mm, can diameter 10.00mm), and identical regulatory compliance (ROHS3 Compliant, REACH Unaffected). Both parts are Active in product status with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 350PX10MEFC10X16 be used as a direct replacement for the SK100M350ST on existing PCBs?

A: Yes. Both parts share identical lead spacing (0.197" / 5.00mm), identical can diameter (0.394" / 10.00mm), and identical through-hole mounting configuration. The Rubycon substitute is physically shorter (18.00mm vs. 23.00mm seated height), which presents no compatibility issue for through-hole mounting. PCB footprints designed for the SK100M350ST will accept the 350PX10MEFC10X16 without modification.

Q: What are the key electrical differences between these two parts?

A: Both parts deliver identical capacitance (10 µF), voltage rating (350 V), and tolerance (±20%). The Rubycon substitute provides higher ripple current capacity (95 mA @ 120 Hz vs. 70 mA @ 120 Hz) and extended temperature performance (2000 Hrs @ 105°C vs. 2000 Hrs @ 85°C). ESR data for the Rubycon part is not specified in available documentation.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 Compliant and REACH Unaffected. Both carry identical regulatory classification (ECCN: EAR99, HTSUS: 8532.22.0020).

Q: Which part should be selected for high-temperature applications?

A: The 350PX10MEFC10X16 (Rubycon) is specified for operation to 105°C with 2000-hour lifetime at that temperature. The SK100M350ST (CDE) is specified for operation to 85°C with 2000-hour lifetime at that temperature. For applications requiring sustained operation above 85°C, the Rubycon substitute is the appropriate selection.

Q: Does the height difference affect circuit performance?

A: No. The height difference (23.00mm vs. 18.00mm) is a mechanical dimension only and does not affect electrical performance. The reduction in height may provide layout advantages in space-constrained designs.

Q: Are both parts available in the same packaging format?

A: Both parts are supplied in radial, through-hole can configuration. The SK100M350ST is available in standard inventory packaging. The 350PX10MEFC10X16 is available in bulk packaging. Both are suitable for production assembly processes.