SS100M025ST Equivalent & Substitute Parts

Part Overview

The SS100M025ST is a 10 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete. Alternative equivalent or substitute parts are necessary to ensure circuit continuity and component availability for new designs, repairs, and maintenance applications requiring this specification.

Key Parameters

Parameter	Value
Capacitance	10 µF
Voltage - Rated	25 V
Tolerance	±20%
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Mounting Type	Through Hole
Package / Case	Radial, Can
Lead Spacing	0.079" (2.00mm)
Size / Dimension	0.197" Dia (5.00mm)
ESR @ 120Hz	19.9 Ohm
Lifetime @ Temp.	1000 Hrs @ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution criteria for the SS100M025ST are based on the following key electrical and mechanical parameters:

Capacitance: 10 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage - Rated: 25 V minimum (equal or higher voltage rating acceptable)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Lead Spacing: 0.079" (2.00mm) (exact match required)
Size / Dimension: 0.197" Dia (5.00mm) (exact match required)
Polarization: Polar (exact match required)
Operating Temperature Range: -40°C ~ 85°C minimum coverage

Substitute parts are categorized as direct equivalents when all critical parameters match the main part specification. Higher voltage-rated substitutes (35 V, 50 V) are classified as upgrades and provide enhanced voltage headroom for circuit protection.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage - Rated	Tolerance	ESR	Lifetime @ Temp.	Height (Max)	Product Status
SS100M025ST	Cornell Dubilier Electronics (CDE)	10 µF	25 V	±20%	19.9 Ohm @ 120Hz	1000 Hrs @ 85°C	0.276" (7.00mm)	Obsolete
SK100M025ST	Cornell Dubilier Electronics (CDE)	10 µF	25 V	±20%	18.57 Ohm	2000 Hrs @ 85°C	0.512" (13.00mm)	Active
ECE-A1EKS100	Panasonic Electronic Components	10 µF	25 V	±20%	—	1000 Hrs @ 85°C	0.236" (6.00mm)	Active
25MH510MEFC5X5	Rubycon	10 µF	25 V	±20%	—	1000 Hrs @ 105°C	0.256" (6.50mm)	Obsolete
35MS510MEFC5X5	Rubycon	10 µF	35 V	±20%	—	1000 Hrs @ 85°C	0.256" (6.50mm)	Obsolete
ECE-A1HKA100	Panasonic Electronic Components	10 µF	50 V	±20%	—	1000 Hrs @ 85°C	0.276" (7.00mm)	Active
ECE-A1VKA100	Panasonic Electronic Components	10 µF	35 V	±20%	—	1000 Hrs @ 85°C	0.276" (7.00mm)	Active
EEA-GA1V100	Panasonic Electronic Components	10 µF	35 V	±20%	—	1000 Hrs @ 105°C	0.276" (7.00mm)	Active

Engineering Selection Recommendations

Direct Equivalents (Same Voltage Rating)

SK100M025ST (Cornell Dubilier Electronics): Direct equivalent with identical electrical specifications. Active product status ensures availability. Higher ESR value (18.57 Ohm vs. 19.9 Ohm) and extended lifetime rating (2000 Hrs @ 85°C vs. 1000 Hrs @ 85°C) provide improved performance margin. Height difference of 0.512" (13.00mm) versus 0.276" (7.00mm) requires physical fit verification in space-constrained applications.
ECE-A1EKS100 (Panasonic Electronic Components): Direct equivalent with 25 V rating and matching capacitance and tolerance. Active product status. Compact height of 0.236" (6.00mm) offers space savings for size-sensitive designs.

Upgrade Options (Higher Voltage Rating)

Higher voltage-rated substitutes maintain all critical electrical and mechanical compatibility while providing enhanced voltage margin for circuit protection:

ECE-A1VKA100 (Panasonic Electronic Components): 35 V rating, active product status, matching physical package dimensions (0.276" height) to the main part.
EEA-GA1V100 (Panasonic Electronic Components): 35 V rating, active product status, extended operating temperature range (-55°C ~ 105°C), higher lifetime rating at elevated temperature (1000 Hrs @ 105°C).
ECE-A1HKA100 (Panasonic Electronic Components): 50 V rating, active product status, maximum voltage margin, matching physical package dimensions (0.276" height).

Obsolete Part Alternatives

The following obsolete substitutes are not recommended for new designs but may be used for direct replacements in existing applications if current stock is available:

25MH510MEFC5X5 (Rubycon): 25 V rating, extended thermal performance (1000 Hrs @ 105°C).
35MS510MEFC5X5 (Rubycon): 35 V rating, 10 µF capacitance.

All listed alternatives are ROHS3 Compliant and rated for -40°C ~ 85°C operating temperature range (EEA-GA1V100 extends to -55°C ~ 105°C). Selection of a specific substitute part depends on circuit voltage requirements, thermal environment, physical space availability, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a substitute for the SS100M025ST? A: Yes. A capacitor with a higher voltage rating (35 V, 50 V) will function correctly in a circuit designed for 25 V operation. Higher voltage ratings do not affect circuit performance and provide additional voltage margin for transient protection. The electrical and mechanical compatibility must be verified, particularly lead spacing, package dimensions, and physical height for board-level fit.

Q: What is the primary difference between SK100M025ST and SS100M025ST? A: Both parts are 10 µF, 25 V aluminum electrolytic capacitors in identical package configurations. The SK100M025ST is manufactured by the same supplier (Cornell Dubilier Electronics) with active product status, lower ESR (18.57 Ohm vs. 19.9 Ohm), and extended lifetime (2000 Hrs @ 85°C vs. 1000 Hrs @ 85°C). Physical height differs; SK100M025ST is 0.512" versus 0.276" for SS100M025ST.

Q: Are Panasonic ECE-A1 series parts directly compatible with the CDE SS100M025ST? A: Yes. Panasonic ECE-A1EKS100 (25 V), ECE-A1VKA100 (35 V), and ECE-A1HKA100 (50 V) are electrically and mechanically compatible with identical lead spacing (0.079"), package type (radial, can), and capacitance (10 µF). All are rated for -40°C ~ 85°C or extended temperature range. Physical height may vary; verify component clearance in your specific application.

Q: Why is EEA-GA1V100 listed as an upgrade alternative? A: EEA-GA1V100 provides a 35 V voltage rating with extended operational temperature capability (-55°C ~ 105°C) and higher lifetime rating at elevated temperature (1000 Hrs @ 105°C). This part is suitable for applications requiring enhanced thermal performance or wider operating temperature range while maintaining the same 10 µF capacitance and ±20% tolerance.

Q: Can I use a substitute part with different physical dimensions? A: Physical dimensions (lead spacing, diameter, and height) are critical for circuit board compatibility. Lead spacing and diameter must match the original design (0.079" spacing, 0.197" diameter for this part family). Height variations may affect board layout; some alternatives offer compact heights (0.236" for ECE-A1EKS100) while others are taller (0.512" for SK100M025ST). Verify PCB hole pattern and physical clearance before selecting a substitute with dimension differences.

Q: Is RoHS compliance important for selecting a substitute? A: All listed substitute parts are ROHS3 Compliant, matching the compliance status of the main part SS100M025ST. For applications requiring specific regulatory certifications or environmental standards, verify that selected substitute parts carry equivalent certifications.

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