337CKE025M Equivalent & Substitute Parts Reference

Part Overview

The 337CKE025M is a 330 µF, 25 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the CKE series. This radial, through-hole component is designed for bypass and decoupling applications with a rated lifetime of 2000 hours at 105°C. The part is currently active in production and ROHS3 compliant.

Substitute parts are necessary when the original 337CKE025M is unavailable, when extended operational lifetime is required, or when improved electrical performance characteristics are needed for specific circuit requirements. All substitute parts listed maintain identical capacitance, voltage rating, tolerance, and physical form factor while offering alternative manufacturers and enhanced specifications.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Voltage - Rated	25	V
Tolerance	±20	%
Polarization	Polar	—
Package / Case	Radial, Can	—
Mounting Type	Through Hole	—
Lead Spacing	0.138" (3.50 mm)	—
Size / Dimension	0.315" Dia (8.00 mm)	—
Height - Seated (Max)	0.512" (13.00 mm)	—
Operating Temperature Range	-40°C ~ 105°C	—
Lifetime @ 105°C	2000	Hrs
RoHS Status	ROHS3 Compliant	—
REACH Status	REACH Unaffected	—

Substitute Part Grouping Explanation

Substitution compatibility for the 337CKE025M is determined by strict adherence to the following parameters:

Critical Parameters (Must Match Exactly):

Capacitance: 330 µF
Voltage Rating: 25 V
Tolerance: ±20%
Polarization: Polar
Package Type: Radial, Can
Mounting Type: Through Hole
Lead Spacing: 0.138" (3.50 mm)
Physical Dimensions: 0.315" Dia × 0.512" Height (Max)
Operating Temperature Range: -40°C ~ 105°C

Performance Parameters (May Vary):

Lifetime @ 105°C: 2000 hours or greater
ESR (Equivalent Series Resistance): Lower values indicate improved performance
Ripple Current: Higher values indicate improved performance
Impedance: Lower values indicate improved performance

All substitute parts listed maintain identical critical parameters. Variations in performance parameters represent either equivalent or upgraded alternatives. Parts are categorized as direct substitutes (equivalent performance) or upgrades (enhanced performance characteristics).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance (%)	Lifetime @ 105°C (Hrs)	ESR @ 120Hz (mOhm)	Ripple Current @ 120Hz (mA)	Impedance (mOhm)	Product Status
337CKE025M	Cornell Dubilier / Illinois Capacitor	CKE	330	25	±20	2000	493.8	340	—	Active
ESH337M025AG3AA	KEMET	ESH	330	25	±20	2000	—	300	—	Active
UKA1E331MPD	Nichicon	UKA	330	25	±20	2000	—	290	—	Not For New Designs
25YXG330MEFC8X11.5	Rubycon	YXG	330	25	±20	4000	—	—	—	Not For New Designs
25YXJ330M8X11.5	Rubycon	YXJ	330	25	±20	7000	—	448	130	Active
25ZLH330MEFC8X11.5	Rubycon	ZLH	330	25	±20	8000	—	519.75	56	Active
25ZLJ330M8X11.5	Rubycon	ZLJ	330	25	±20	9000	—	660	75	Active
25ZLQ330MEFC8X11.5	Rubycon	ZLQ	330	25	±20	4000	—	583	49	Active
25ZLS330MEFC8X11.5	Rubycon	ZLS	330	25	±20	6000	—	495	62	Active
EEU-FR1E331	Panasonic Electronic Components	FR-A	330	25	±20	6000	—	665	56	Active
EKYB250ELL331MHB5D	Chemi-Con	KYB	330	25	±20	7000	—	420	87	Active

Engineering Selection Recommendations

Direct Substitutes (Equivalent Performance):

ESH337M025AG3AA (KEMET) and UKA1E331MPD (Nichicon) are direct functional equivalents to the 337CKE025M. Both maintain the 2000-hour lifetime specification at 105°C and are ROHS3 compliant. ESH337M025AG3AA is recommended for new applications due to active product status. UKA1E331MPD is designated "Not For New Designs" and should be used only for legacy system maintenance or replacement applications.

Upgraded Alternatives (Enhanced Performance):

All Rubycon parts (25YXG330MEFC8X11.5, 25YXJ330M8X11.5, 25ZLH330MEFC8X11.5, 25ZLJ330M8X11.5, 25ZLQ330MEFC8X11.5, 25ZLS330MEFC8X11.5) and Panasonic EEU-FR1E331 offer extended operational lifetimes ranging from 4000 to 9000 hours at 105°C, compared to the 2000-hour baseline. These parts are suitable for applications requiring enhanced reliability or extended service intervals. All upgraded alternatives maintain ROHS3 compliance and REACH unaffected status.

Product Status Considerations:

For new circuit designs, select only parts with "Active" product status: ESH337M025AG3AA, 25YXJ330M8X11.5, 25ZLH330MEFC8X11.5, 25ZLJ330M8X11.5, 25ZLQ330MEFC8X11.5, 25ZLS330MEFC8X11.5, EEU-FR1E331, and EKYB250ELL331MHB5D. Parts marked "Not For New Designs" (25YXG330MEFC8X11.5, UKA1E331MPD) are restricted to replacement and legacy support applications.

Compliance and Certifications:

All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. All parts are classified under ECCN EAR99 and HTSUS 8532.22.0020.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 337CKE025M with any of the listed parts without circuit modification?

A: Yes. All listed substitute parts maintain identical capacitance (330 µF), voltage rating (25 V), tolerance (±20%), polarization (polar), package type (radial can), mounting type (through hole), lead spacing (0.138" / 3.50 mm), and physical dimensions (0.315" diameter × 0.512" maximum height). Direct pin-for-pin replacement is possible without circuit redesign.

Q: What is the difference between direct substitutes and upgraded alternatives?

A: Direct substitutes (ESH337M025AG3AA, UKA1E331MPD) maintain the same 2000-hour lifetime specification at 105°C as the original 337CKE025M. Upgraded alternatives offer extended lifetimes (4000 to 9000 hours at 105°C) and improved electrical performance characteristics such as lower impedance and higher ripple current ratings. Upgraded parts are backward compatible and can be used in any application designed for the original part.

Q: Why should I avoid parts marked "Not For New Designs"?

A: Parts designated "Not For New Designs" (25YXG330MEFC8X11.5, UKA1E331MPD) are in end-of-life status and may have limited future availability. These parts are suitable only for maintaining existing equipment or replacing failed components in legacy systems. New circuit designs should specify only parts with "Active" product status to ensure long-term supply chain continuity.

Q: How do I select between multiple upgraded alternatives?

A: Selection depends on specific application requirements. For maximum ripple current handling, select 25ZLJ330M8X11.5 (660 mA @ 120 Hz, 9000-hour lifetime). For lowest impedance performance, select 25ZLH330MEFC8X11.5 (56 mOhm impedance, 8000-hour lifetime). For general-purpose applications with balanced performance, select EEU-FR1E331 (665 mA ripple current, 56 mOhm impedance, 6000-hour lifetime). All three are active products with full compliance certifications.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are supplied in bulk packaging as radial, through-hole components with identical lead spacing and physical dimensions. No special handling or packaging considerations are required for substitution.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant and REACH unaffected. All parts are classified under ECCN EAR99 and HTSUS 8532.22.0020, meeting current environmental regulations and export control requirements.

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