337CKS100M Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The 337CKS100M is a 330 µF, 100 V radial aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the CKS series. This component is rated for general-purpose applications with a 2000-hour lifetime at 85°C and an operating temperature range of -40°C to 85°C. The part is currently active in production status with 1166 units in stock.

Substitute parts are necessary when the original 337CKS100M becomes unavailable, when alternative packaging is required, or when enhanced thermal performance specifications are needed for specific application environments. The substitute parts listed maintain electrical equivalence through matching capacitance, voltage rating, tolerance, and mechanical form factor while offering variations in thermal ratings and manufacturer availability.

Key Parameters

Parameter	Specification
Capacitance	330 µF
Voltage Rating	100 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.492" (12.50 mm)
Operating Temperature Range	-40°C to 85°C (base); -40°C to 105°C (enhanced)
Lifetime Rating	2000 Hrs @ 85°C or 105°C
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 337CKS100M is determined by strict equivalence in the following parameters:

Primary Equivalence Criteria (Must Match):

Capacitance: 330 µF
Voltage Rating: 100 V
Tolerance: ±20%
Package Type: Radial, Can
Lead Spacing: 0.197" (5.00 mm)
Case Diameter: 0.492" (12.50 mm)
Mounting Type: Through Hole
Polarization: Polar

Secondary Variation Parameters (Allowed to Differ):

Operating Temperature Range: -40°C to 85°C or -40°C to 105°C
Lifetime @ Temperature: 2000 Hrs @ 85°C or 2000 Hrs @ 105°C
ESR (Equivalent Series Resistance): Specified or unspecified
Ripple Current ratings: Variations permitted within application tolerance
Manufacturer: Cornell Dubilier, Rubycon, Panasonic, Nichicon, Chemi-Con
Series designation: CKS, CKE, PK, PX, M-A, UVK, SMG
Product Status: Active or Not For New Designs

All substitute parts listed maintain identical mechanical dimensions and electrical ratings, ensuring direct form-fit-function compatibility in through-hole PCB applications.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Operating Temp	Lifetime @ Temp	Lead Spacing	Case Dia	Height (Max)	Product Status	Inventory
337CKS100M	Cornell Dubilier	CKS	330 µF	100 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	Active	1166 Pcs
337CKE100M	Cornell Dubilier	CKE	330 µF	100 V	±20%	-40°C ~ 105°C	2000 Hrs @ 105°C	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	Active	22432 Pcs
100PK330MEFC12.5X25	Rubycon	PK	330 µF	100 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00 mm)	0.492" (12.50 mm)	1.063" (27.00 mm)	Active	2135 Pcs
ECA-2AM331	Panasonic	M-A	330 µF	100 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00 mm)	0.492" (12.50 mm)	1.063" (27.00 mm)	Active	855 Pcs
UVK2A331MHD	Nichicon	UVK	330 µF	100 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00 mm)	0.492" (12.50 mm)	1.063" (27.00 mm)	Not For New Designs	969 Pcs
100PX330MEFC12.5X25	Rubycon	PX	330 µF	100 V	±20%	-55°C ~ 105°C	2000 Hrs @ 105°C	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	Active	4200 Pcs
ESMG101ELL331MK25S	Chemi-Con	SMG	330 µF	100 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	Active	1568 Pcs

Engineering Selection Recommendations

Direct Equivalent (Same Thermal Rating): The 337CKE100M (Cornell Dubilier CKE series) is the primary equivalent from the same manufacturer with enhanced thermal performance (-40°C to 105°C operating range, 2000 Hrs @ 105°C). This part maintains identical mechanical dimensions to the 337CKS100M and is ROHS3 compliant with active production status. Inventory availability is significantly higher at 22,432 units.

Thermal-Enhanced Upgrade: The 100PX330MEFC12.5X25 (Rubycon PX series) provides extended operating temperature range (-55°C to 105°C) and 2000-hour lifetime at 105°C. This part is suitable for applications requiring superior thermal performance while maintaining all electrical and mechanical equivalence. Product status is active with 4,200 units in stock.

Alternative Manufacturers (Standard Thermal Rating): The 100PK330MEFC12.5X25 (Rubycon PK series), ECA-2AM331 (Panasonic M-A series), and ESMG101ELL331MK25S (Chemi-Con SMG series) are functionally equivalent alternatives with standard -40°C to 85°C operating range and 2000-hour lifetime at 85°C. All are ROHS3 compliant and active in production. These parts accommodate applications where thermal performance equivalent to the original 337CKS100M is sufficient.

Legacy Component (Not Recommended for New Designs): The UVK2A331MHD (Nichicon UVK series) meets all electrical and mechanical specifications but carries a "Not For New Designs" product status. This part should be used only for replacement or repair of existing assemblies where continuity with legacy designs is required.

Compliance and Certifications: All listed substitute parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8532.22.0020. Moisture sensitivity level is either 1 (unlimited) or not applicable for all parts, indicating no special handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 337CKS100M with the 337CKE100M?

A: Yes. The 337CKE100M is a direct mechanical and electrical equivalent with identical capacitance (330 µF), voltage rating (100 V), tolerance (±20%), lead spacing (5.00 mm), and case diameter (12.50 mm). The 337CKE100M offers enhanced thermal performance with an operating range of -40°C to 105°C and 2000-hour lifetime at 105°C, compared to the 337CKS100M's -40°C to 85°C range and 2000-hour lifetime at 85°C. Both are Cornell Dubilier products with ROHS3 compliance and active production status.

Q: What is the difference between the 100PK330MEFC12.5X25 and 100PX330MEFC12.5X25?

A: Both are Rubycon radial aluminum electrolytic capacitors with 330 µF capacitance and 100 V rating. The 100PK330MEFC12.5X25 (PK series) operates from -40°C to 85°C with 2000-hour lifetime at 85°C and has a maximum seated height of 1.063 inches. The 100PX330MEFC12.5X25 (PX series) operates from -55°C to 105°C with 2000-hour lifetime at 105°C and has a maximum seated height of 1.043 inches. The PX series provides extended temperature range and is suitable for higher-temperature applications.

Q: Are all substitute parts mechanically compatible with the original 337CKS100M?

A: All substitute parts maintain the required through-hole lead spacing of 0.197 inches (5.00 mm) and case diameter of 0.492 inches (12.50 mm). However, maximum seated heights vary slightly: the 337CKS100M and 100PX330MEFC12.5X25 are 1.043 inches, while the 100PK330MEFC12.5X25, ECA-2AM331, UVK2A331MHD, and ESMG101ELL331MK25S are 1.063 inches. These minor height differences (0.020 inches) do not affect PCB layout compatibility for standard through-hole applications but should be verified if clearance is constrained.

Q: Why is the UVK2A331MHD marked "Not For New Designs"?

A: The UVK2A331MHD carries a "Not For New Designs" product status, indicating that Nichicon has discontinued this series for new applications. This part remains available for replacement and repair of existing assemblies. For new designs, select from parts with "Active" status: 337CKE100M, 100PK330MEFC12.5X25, ECA-2AM331, 100PX330MEFC12.5X25, or ESMG101ELL331MK25S.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is strictly determined by matching capacitance (330 µF), voltage rating (100 V), tolerance (±20%), package type (radial can), lead spacing (5.00 mm), case diameter (12.50 mm), mounting type (through hole), and polarization (polar). Operating temperature range and lifetime ratings may vary between substitutes. All listed parts meet these primary equivalence criteria and are ROHS3 compliant.

Q: Can I use the 100PX330MEFC12.5X25 in place of the 337CKS100M in all applications?

A: Yes, the 100PX330MEFC12.5X25 is mechanically and electrically compatible with the 337CKS100M. The Rubycon PX series provides superior thermal performance with an extended operating range (-55°C to 105°C) and higher temperature lifetime rating (2000 Hrs @ 105°C). This makes it suitable for all applications where the 337CKS100M is used, with the added benefit of enhanced thermal stability in high-temperature environments.

Q: What is the inventory status for substitute parts?

A: Current inventory levels are: 337CKE100M (22,432 units), 100PX330MEFC12.5X25 (4,200 units), 100PK330MEFC12.5X25 (2,135 units), ESMG101ELL331MK25S (1,568 units), UVK2A331MHD (969 units), and ECA-2AM331 (855 units). The 337CKE100M offers the highest availability and is recommended as the primary substitute when the original 337CKS100M is unavailable.

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