SK103M010ST Equivalent & Substitute Parts Reference

Part Overview

The SK103M010ST is a 10000 µF, 10 V aluminum electrolytic capacitor in radial can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as Active product status and is designed for general-purpose applications requiring bulk energy storage and filtering. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 2000 hours at 85°C. Equivalent and substitute parts are necessary when the original SK103M010ST becomes unavailable, when design requirements demand enhanced performance characteristics such as higher voltage ratings or extended temperature operation, or when alternative manufacturers' components offer superior electrical specifications within the same physical footprint and mounting configuration.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	10000	µF	Critical - must match exactly
Voltage Rating	10	V	Critical - substitutes may have higher ratings
Tolerance	±20%	%	Critical - must match or be tighter
ESR @ 120Hz	50	mOhm	Important - affects ripple current handling
Lifetime @ 85°C	2000	Hours	Important - determines reliability envelope
Operating Temperature Range	-40 to 85	°C	Important - defines thermal limits
Lead Spacing	7.50	mm	Critical - PCB layout compatibility
Case Diameter	18.00	mm	Critical - physical fit requirement
Height (Seated Max)	37.00	mm	Critical - clearance and assembly constraint
Mounting Type	Through Hole	-	Critical - assembly method
Package Type	Radial, Can	-	Critical - form factor
RoHS Status	ROHS3 Compliant	-	Important - regulatory compliance

Substitute Part Grouping Explanation

Substitution logic for the SK103M010ST is based on strict electrical and mechanical compatibility within the aluminum electrolytic capacitor category. All substitute parts must maintain the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 10000 µF (exact match required)
Tolerance: ±20% or tighter
Lead Spacing: 0.295" (7.50 mm)
Case Diameter: 0.709" (18.00 mm)
Mounting Type: Through Hole
Package Type: Radial, Can
Polarization: Polar

Allowable Variation Parameters:

Voltage Rating: May be equal or higher than 10 V (higher voltage provides backward compatibility in circuits designed for 10 V operation)
Operating Temperature Range: May be equal or extended beyond -40°C to 85°C
Lifetime @ Temperature: May be equal or longer than 2000 Hrs @ 85°C
ESR: May be lower than 50 mOhm @ 120Hz (lower ESR improves performance)
Height (Seated Max): Acceptable if ≤ 37.00 mm (1.457")

Regulatory Compliance: All substitute parts must maintain ROHS3 compliance and EAR99 export classification to ensure regulatory alignment with the original component.

Substitutes are grouped into two categories: Direct Substitutes (same voltage rating) and Upgrade Substitutes (higher voltage ratings or extended temperature operation).

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance (%)	ESR @ 120Hz (mOhm)	Lifetime @ Temp (Hrs)	Temp Range (°C)	Height Max (mm)	Product Status
SK103M010ST	Cornell Dubilier	10000	10	±20	50	2000 @ 85°C	-40 to 85	37.00	Active
UVR1C103MHD	Nichicon	10000	16	±20	—	2000 @ 85°C	-40 to 85	35.50	Not For New Designs
109CKH010M	Cornell Dubilier / Illinois Capacitor	10000	10	±20	66.3	2000 @ 105°C	-40 to 105	36.50	Active
109CKS016M	Cornell Dubilier / Illinois Capacitor	10000	16	±20	56	2000 @ 85°C	-40 to 85	36.50	Active
25PX10000MEFC18X35.5	Rubycon	10000	25	±20	—	2000 @ 105°C	-55 to 105	37.00	Active
ECA-1CHG103	Panasonic Electronic Components	10000	16	±20	—	2000 @ 105°C	-55 to 105	37.50	Active
EEU-HD1E103	Panasonic Electronic Components	10000	25	±20	—	2000 @ 105°C	-55 to 105	37.50	Active
UBY1E103MHL	Nichicon	10000	25	±20	19	3000 @ 135°C	-40 to 135	37.00	Active
UKA1C103MHD	Nichicon	10000	16	±20	—	2000 @ 105°C	-55 to 105	37.00	Not For New Designs
UPS1A103MHD	Nichicon	10000	10	±20	30	3000 @ 105°C	-55 to 105	37.50	Not For New Designs

Engineering Selection Recommendations

Direct Equivalent (Same Voltage Rating - 10V):

The 109CKH010M (Cornell Dubilier / Illinois Capacitor, CKH series) serves as the primary direct equivalent to the SK103M010ST. Both components share identical capacitance (10000 µF), voltage rating (10 V), and tolerance (±20%). The 109CKH010M is Active product status, ensuring continued availability and manufacturing support. This part offers extended temperature operation (-40°C to 105°C versus -40°C to 85°C) and extended lifetime (2000 Hrs @ 105°C versus 2000 Hrs @ 85°C), providing enhanced reliability margins. Physical dimensions are compatible with the original part (height 36.50 mm versus 37.00 mm maximum). The ESR specification of 66.3 mOhm @ 120Hz is slightly higher than the original 50 mOhm, which remains acceptable for general-purpose and bypass/decoupling applications.

Upgrade Substitutes (Higher Voltage Ratings):

Higher voltage-rated substitutes provide backward compatibility with 10 V circuit designs while offering improved voltage margin and extended operational capability:

109CKS016M (16 V rating): Active status, Cornell Dubilier / Illinois Capacitor manufacture. Offers improved ESR (56 mOhm @ 120Hz) and higher ripple current capacity (3.23 A @ 120 Hz). Height 36.50 mm. Suitable for general-purpose applications requiring enhanced performance.
25PX10000MEFC18X35.5 (25 V rating): Active status, Rubycon PX series. Extended temperature range (-55°C to 105°C) and extended lifetime (2000 Hrs @ 105°C). Height 37.00 mm matches original. Suitable for applications requiring wide temperature operation.
ECA-1CHG103 (16 V rating): Active status, Panasonic NHG-A series. Extended temperature range (-55°C to 105°C) and extended lifetime (2000 Hrs @ 105°C). Height 37.50 mm. Suitable for general-purpose applications with enhanced thermal performance.
EEU-HD1E103 (25 V rating): Active status, Panasonic HD series. Extended temperature range (-55°C to 105°C) and extended lifetime (2000 Hrs @ 105°C). Height 37.50 mm. Suitable for general-purpose applications with superior thermal stability.
UBY1E103MHL (25 V rating): Active status, Nichicon UBY series. Superior ESR (19 mOhm @ 100kHz) and extended lifetime (3000 Hrs @ 135°C). Extended temperature range (-40°C to 135°C). Designed for automotive applications. Height 37.00 mm. Provides exceptional performance margin for demanding environments.

Parts Not Recommended for New Designs:

The following substitutes carry "Not For New Designs" product status and should be used only for replacement of existing assemblies or legacy system maintenance:

UVR1C103MHD (Nichicon, 16 V)
UKA1C103MHD (Nichicon, 16 V)
UPS1A103MHD (Nichicon, 10 V)

These parts remain available in inventory but are not recommended for incorporation into new product designs due to manufacturer lifecycle status.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a substitute for the SK103M010ST?

A: Yes. A capacitor with a higher voltage rating (16 V, 25 V) is electrically compatible with a 10 V circuit design. The higher voltage rating provides additional voltage margin and does not degrade circuit performance. All substitute parts listed with 16 V or 25 V ratings are backward compatible with the original 10 V specification.

Q: What is the significance of ESR (Equivalent Series Resistance) in selecting a substitute?

A: ESR affects the capacitor's ability to handle ripple current and its thermal performance. Lower ESR values indicate better high-frequency performance and reduced heat generation. The original SK103M010ST specifies 50 mOhm @ 120Hz. Substitutes with equal or lower ESR values maintain or improve performance. The 109CKH010M (66.3 mOhm) has slightly higher ESR but remains acceptable for general-purpose applications. The UBY1E103MHL (19 mOhm @ 100kHz) offers superior ESR performance.

Q: Are all substitute parts physically compatible with the original PCB layout?

A: Physical compatibility requires matching lead spacing (7.50 mm), case diameter (18.00 mm), and height clearance. All listed substitutes maintain the required 7.50 mm lead spacing and 18.00 mm diameter. Height specifications range from 35.50 mm to 37.50 mm. The original SK103M010ST specifies 37.00 mm maximum height. Substitutes with heights ≤ 37.00 mm (109CKH010M at 36.50 mm, 25PX10000MEFC18X35.5 at 37.00 mm, UBY1E103MHL at 37.00 mm) provide direct fit. Substitutes with heights up to 37.50 mm (ECA-1CHG103, EEU-HD1E103) require verification of available clearance above the component.

Q: What is the difference between Active and "Not For New Designs" product status?

A: Active status indicates the manufacturer continues production and supports the component for new product designs. "Not For New Designs" status indicates the manufacturer has discontinued active development but maintains limited production for replacement and legacy support. For new designs, select only Active status parts: 109CKH010M, 109CKS016M, 25PX10000MEFC18X35.5, ECA-1CHG103, EEU-HD1E103, or UBY1E103MHL.

Q: How does extended temperature operation affect component selection?

A: The original SK103M010ST operates from -40°C to 85°C with 2000 hours lifetime at 85°C. Substitutes with extended temperature ranges (-55°C to 105°C or -40°C to 135°C) and extended lifetimes (2000 Hrs @ 105°C or 3000 Hrs @ 135°C) provide enhanced reliability in thermally demanding applications. The 109CKH010M extends operation to 105°C. The UBY1E103MHL extends operation to 135°C with 3000-hour lifetime, suitable for automotive and high-reliability applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance, matching the regulatory status of the original SK103M010ST. This ensures compatibility with RoHS-regulated supply chains and end-use markets.

Q: What is the practical difference between ripple current ratings at 120 Hz versus 100 kHz?

A: Ripple current ratings specify the maximum AC current the capacitor can handle at specific frequencies without exceeding temperature limits. Low-frequency ripple current (120 Hz) is relevant for power supply filtering applications. High-frequency ripple current (100 kHz or 1 kHz) is relevant for switching power supplies and high-frequency switching circuits. The original SK103M010ST specifies 2.5 A @ 120 Hz and 2.75 A @ 1 kHz. Substitutes with higher ripple current ratings provide margin for demanding applications.

Q: Can I substitute the SK103M010ST with a capacitor rated for a lower voltage?

A: No. A lower voltage-rated capacitor is not acceptable. The circuit is designed for 10 V operation, and a lower-rated capacitor would exceed its voltage rating, resulting in premature failure or catastrophic breakdown. All substitutes must have voltage ratings equal to or greater than 10 V.

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