SK331M010ST Equivalent & Substitute Parts Reference

Part Overview

The SK331M010ST is a 330 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 polarized capacitive energy storage. 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 identified based on matching capacitance, tolerance, physical dimensions, mounting type, and lead spacing while accommodating variations in voltage rating, ESR characteristics, and thermal performance specifications.

Key Parameters

Parameter	SK331M010ST	Unit
Capacitance	330	µF
Tolerance	±20%	-
Voltage - Rated	10	V
ESR @ 120Hz	760	mOhm
Lifetime @ Temperature	2000 Hrs @ 85°C	-
Operating Temperature Range	-40°C ~ 85°C	-
Lead Spacing	0.138" (3.50mm)	-
Size / Dimension	0.315" Dia (8.00mm)	-
Height - Seated (Max)	0.512" (13.00mm)	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
Polarization	Polar	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SK331M010ST are grouped based on the following substitution criteria:

Primary Matching Parameters:

Capacitance: 330 µF (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.138" (3.50mm) (exact match required)
Physical Dimensions: 0.315" Dia (8.00mm) and 0.512" Height (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Polarization: Polar (exact match required)

Variable Parameters Allowing Substitution:

Voltage - Rated: 10 V (main part) to 16 V or 25 V (substitute parts). Higher voltage ratings provide backward compatibility in circuits designed for lower voltage operation.
Operating Temperature Range: -40°C ~ 85°C (main part) to -40°C ~ 105°C (substitute parts). Extended temperature ranges provide enhanced thermal performance.
Lifetime @ Temperature: 2000 Hrs @ 85°C (main part) to 3000-9000 Hrs @ 105°C (substitute parts). Extended lifetime specifications indicate improved reliability.
ESR and Impedance: Variations permitted based on manufacturer design. Lower ESR values indicate improved high-frequency performance.
Ripple Current Ratings: Variations permitted based on manufacturer specifications and operating frequency.

Substitute parts are organized into two voltage categories: 16 V rated parts and 25 V rated parts. All substitute parts maintain identical physical form factors and lead configurations to ensure direct mechanical and electrical compatibility.

Parameter Comparison

Parameter	SK331M010ST	EEU-FM1C331	16YXF330MEFC8X11.5	16ZL330MEFC8X11.5	25YXG330MEFC8X11.5	25YXJ330M8X11.5	25ZLH330MEFC8X11.5	25ZLJ330M8X11.5	25ZLQ330MEFC8X11.5	25ZLS330MEFC8X11.5	337CKS025M
Manufacturer	Cornell Dubilier	Panasonic	Rubycon	Rubycon	Rubycon	Rubycon	Rubycon	Rubycon	Rubycon	Rubycon	Cornell Dubilier / Illinois Capacitor
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	10 V	16 V	16 V	16 V	25 V	25 V	25 V	25 V	25 V	25 V	25 V
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 85°C
Lifetime @ Temperature	2000 Hrs @ 85°C	3000 Hrs @ 105°C	7000 Hrs @ 105°C	3000 Hrs @ 105°C	4000 Hrs @ 105°C	7000 Hrs @ 105°C	8000 Hrs @ 105°C	9000 Hrs @ 105°C	4000 Hrs @ 105°C	6000 Hrs @ 105°C	2000 Hrs @ 85°C
Lead Spacing	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)
Size / Dimension	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)
Height - Seated (Max)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)	0.512" (13.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Polarization	Polar	Polar	Polar	Polar	Polar	Polar	Polar	Polar	Polar	Polar	Polar
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Not For New Designs	Last Time Buy	Not For New Designs	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

16 V Rated Substitutes (EEU-FM1C331, 16YXF330MEFC8X11.5, 16ZL330MEFC8X11.5):

The 16 V rated alternatives provide a 60% voltage margin above the original 10 V specification. These parts are suitable for applications where the circuit operates at voltages below 10 V and where extended operating temperature range (-40°C to 105°C) is beneficial. EEU-FM1C331 (Panasonic FM-A series) maintains Active product status and offers 3000 hours lifetime at 105°C. The Rubycon 16YXF330MEFC8X11.5 offers extended 7000-hour lifetime but carries Not For New Designs status. The Rubycon 16ZL330MEFC8X11.5 carries Last Time Buy status, indicating limited future availability.

25 V Rated Substitutes (25YXG330MEFC8X11.5, 25YXJ330M8X11.5, 25ZLH330MEFC8X11.5, 25ZLJ330M8X11.5, 25ZLQ330MEFC8X11.5, 25ZLS330MEFC8X11.5, 337CKS025M):

The 25 V rated alternatives provide a 150% voltage margin above the original 10 V specification. These parts are suitable for applications where the circuit operates at voltages below 10 V and where enhanced thermal performance is required. Among these options, 25YXJ330M8X11.5, 25ZLH330MEFC8X11.5, 25ZLJ330M8X11.5, 25ZLQ330MEFC8X11.5, and 25ZLS330MEFC8X11.5 all maintain Active product status. The 25YXG330MEFC8X11.5 carries Not For New Designs status. The 337CKS025M (Cornell Dubilier CKS series) maintains Active status and matches the original manufacturer, offering operational continuity with identical temperature range (-40°C to 85°C) and equivalent 2000-hour lifetime at 85°C.

Highest Reliability Option:

The 25ZLJ330M8X11.5 (Rubycon ZLJ series) offers the longest specified lifetime of 9000 hours at 105°C with Active product status and the highest inventory availability (75,891 pieces). This part provides superior long-term reliability for demanding applications.

Manufacturer Continuity Option:

The 337CKS025M maintains Cornell Dubilier Electronics as the manufacturer, ensuring supply chain consistency and identical thermal performance characteristics to the original SK331M010ST.

Frequently Asked Questions (FAQ)

Q1: Can I substitute a 16 V rated capacitor for the 10 V SK331M010ST?

A: Yes. The 16 V rated parts (EEU-FM1C331, 16YXF330MEFC8X11.5, 16ZL330MEFC8X11.5) are electrically compatible substitutes. Higher voltage ratings provide backward compatibility in circuits designed for lower voltage operation. All three parts maintain identical physical dimensions, lead spacing, and mounting configuration. Verify that your circuit operates below 10 V to ensure safe operation.

Q2: What is the difference between 16 V and 25 V rated substitutes?

A: Both voltage ratings are compatible with the original 10 V circuit application. The 25 V rated parts provide a larger voltage safety margin (150% versus 60%) and generally offer extended thermal performance specifications. Selection depends on circuit voltage requirements, thermal environment, and desired component lifetime. All parts maintain identical physical form factors.

Q3: Why do some substitute parts show "Not For New Designs" status?

A: Parts marked "Not For New Designs" (16YXF330MEFC8X11.5, 25YXG330MEFC8X11.5) are still electrically and mechanically compatible but are being phased out by manufacturers. These parts remain suitable for replacement in existing equipment but should not be selected for new product development. Active status parts are recommended for new designs.

Q4: What does "Last Time Buy" status mean?

A: The 16ZL330MEFC8X11.5 marked as "Last Time Buy" indicates the manufacturer has announced final production. This part remains fully functional and compatible but has limited future availability. Inventory may be depleted, and long-term supply cannot be guaranteed.

Q5: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 Compliant status, matching the original SK331M010ST. All parts are suitable for applications requiring RoHS compliance.

Q6: Can I use a substitute part with extended temperature range (-40°C to 105°C) in a circuit designed for -40°C to 85°C operation?

A: Yes. Extended temperature range specifications indicate the part can operate safely across a wider temperature spectrum. Using a part rated for -40°C to 105°C in a circuit specified for -40°C to 85°C provides additional thermal margin and is electrically safe.

Q7: What is the significance of different lifetime specifications (2000 Hrs @ 85°C versus 7000-9000 Hrs @ 105°C)?

A: Lifetime specifications indicate expected operational duration under stated temperature conditions. Higher lifetime values indicate longer component reliability. The original SK331M010ST specifies 2000 hours at 85°C. Substitute parts with 7000-9000 hour ratings at 105°C provide extended reliability margins, particularly in thermally demanding applications.

Q8: Do all substitute parts have identical physical dimensions?

A: Yes. All substitute parts maintain identical lead spacing (0.138" / 3.50mm), diameter (0.315" / 8.00mm), and height (0.512" / 13.00mm). Direct mechanical substitution is possible without PCB layout modifications.

Q9: Which substitute part offers the best long-term reliability?

A: The 25ZLJ330M8X11.5 (Rubycon ZLJ series) offers the longest specified lifetime of 9000 hours at 105°C with Active product status. This part is recommended for applications requiring maximum reliability and extended service life.

Q10: Should I select a substitute based on manufacturer preference?

A: The 337CKS025M maintains Cornell Dubilier Electronics as the manufacturer, matching the original SK331M010ST. This option provides supply chain continuity and identical thermal performance characteristics. However, all listed substitutes are electrically and mechanically compatible. Selection should prioritize product status (Active preferred), lifetime specifications, and inventory availability for your application requirements.

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