EKZM250ELL331MHB5D Equivalent & Substitute Parts

Part Overview

The EKZM250ELL331MHB5D is a 330 µF, 25 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KZM series. This radial, through-hole component is rated for 8000 hours at 105°C and is designed for general-purpose applications requiring stable capacitance and reliable performance across industrial temperature ranges. The part maintains Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or performance optimization within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Voltage - Rated	25	V
Tolerance	±20%	-
Lifetime @ Temperature	8000	Hrs @ 105°C
Operating Temperature Range	-40 to 105	°C
Polarization	Polar	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
Lead Spacing	0.138 (3.50)	in (mm)
Size / Dimension	0.315 Dia (8.00)	in (mm)
Height - Seated (Max)	0.512 (13.00)	in (mm)
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the EKZM250ELL331MHB5D is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Non-Negotiable):

Capacitance: 330 µF
Voltage Rating: 25 V
Tolerance: ±20%
Polarization: Polar

Mechanical Parameters (Non-Negotiable):

Mounting Type: Through Hole
Package / Case: Radial, Can
Lead Spacing: 0.138" (3.50 mm)
Size / Dimension: 0.315" Dia (8.00 mm)
Height - Seated (Max): 0.512" (13.00 mm) or compatible

Performance Parameters (Allowable Variation):

Lifetime @ 105°C: 8000 hours or greater
Operating Temperature Range: -40°C to 105°C (minimum requirement)
Ripple Current: Equivalent or higher performance acceptable
Impedance: Equivalent or lower acceptable

Compliance Parameters (Required):

RoHS Status: ROHS3 Compliant
Product Status: Active

Substitute parts are classified into two categories: Upgrade substitutes (enhanced performance specifications) and Parametric equivalents (matching baseline specifications).

Parameter Comparison

Parameter	EKZM250ELL331MHB5D (Chemi-Con KZM)	25ZLJ330M8X11.5 (Rubycon ZLJ)	ESL337M025AGMAA (KEMET ESL)	25ZLH330MEFC8X11.5 (Rubycon ZLH)	25ZLH330MEFCCE8X11.5 (Rubycon ZLH)
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF
Voltage - Rated	25 V	25 V	25 V	25 V	25 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	8000 Hrs	9000 Hrs	10000 Hrs	8000 Hrs	8000 Hrs
Operating Temperature	-40 to 105°C	-40 to 105°C	-40 to 105°C	-40 to 105°C	-40 to 105°C
Ripple Current @ 120 Hz	472.5 mA	660 mA	482.5 mA	519.75 mA	519.75 mA
Ripple Current @ 100 kHz	945 mA	1.2 A	965 mA	945 mA	945 mA
Impedance	56 mOhms	75 mOhms	61 mOhms @ 100 kHz	56 mOhms	56 mOhms
Lead Spacing	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)
Size / Dimension	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)
Height - Seated (Max)	0.512" (13.00 mm)	0.512" (13.00 mm)	0.531" (13.50 mm)	0.512" (13.00 mm)	0.512" (13.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Upgrade Substitutes (Enhanced Performance):

The 25ZLJ330M8X11.5 (Rubycon ZLJ) provides extended lifetime of 9000 hours at 105°C compared to the baseline 8000 hours, with improved ripple current handling at both low frequency (660 mA @ 120 Hz) and high frequency (1.2 A @ 100 kHz). This part is suitable for applications requiring enhanced thermal endurance and higher current stress tolerance while maintaining identical electrical and mechanical specifications.

The ESL337M025AGMAA (KEMET ESL) offers the highest lifetime rating of 10000 hours at 105°C with documented ESR of 61 mOhm @ 100 kHz. The height dimension increases to 0.531" (13.50 mm), requiring verification of available board space. This part is appropriate for long-life applications where thermal stability and impedance characteristics are critical design factors.

Parametric Equivalents (Baseline Specifications):

The 25ZLH330MEFC8X11.5 and 25ZLH330MEFCCE8X11.5 (both Rubycon ZLH series) maintain identical electrical and mechanical specifications to the EKZM250ELL331MHB5D with 8000-hour lifetime ratings. These parts are direct functional equivalents suitable for direct replacement in applications where performance enhancement is not required. The ZLH series demonstrates higher ripple current capability at low frequency (519.75 mA @ 120 Hz) compared to the original part.

All substitute parts maintain ROHS3 compliance, Active product status, and compatibility with the specified operating temperature range of -40°C to 105°C.

Frequently Asked Questions (FAQ)

Q: Can the ESL337M025AGMAA be used as a direct replacement if the PCB has limited vertical clearance?

A: The ESL337M025AGMAA has a maximum seated height of 0.531" (13.50 mm) compared to 0.512" (13.00 mm) for the EKZM250ELL331MHB5D. Physical clearance verification is required before selection. The other substitute parts maintain the 0.512" (13.00 mm) height specification.

Q: What is the difference between the two Rubycon ZLH variants (25ZLH330MEFC8X11.5 and 25ZLH330MEFCCE8X11.5)?

A: Both ZLH variants share identical electrical and mechanical specifications, including 330 µF capacitance, 25 V rating, 8000-hour lifetime at 105°C, and 0.512" (13.00 mm) maximum height. Selection between these parts is determined by inventory availability and supply chain requirements rather than performance differentiation.

Q: Is the 25ZLJ330M8X11.5 suitable for applications requiring extended operational life?

A: The 25ZLJ330M8X11.5 provides 9000 hours at 105°C, representing a 12.5% improvement over the baseline 8000-hour specification. This extended lifetime is appropriate for applications with continuous thermal stress or extended service intervals. All other electrical and mechanical parameters remain equivalent to the original part.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All substitute parts maintain identical lead spacing of 0.138" (3.50 mm) and radial can diameter of 0.315" (8.00 mm). The ESL337M025AGMAA requires verification of vertical clearance due to its 0.531" (13.50 mm) height. All other parts maintain the 0.512" (13.00 mm) height specification and are mechanically interchangeable.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. All parts maintain Active product status and are suitable for general-purpose applications across the specified operating temperature range.

Q: Can substitute parts with higher ripple current ratings be used in applications designed for the original part?

A: Substitute parts with equal or higher ripple current ratings are functionally compatible. The 25ZLJ330M8X11.5 provides 660 mA @ 120 Hz and 1.2 A @ 100 kHz, exceeding the original specification. Enhanced ripple current capability does not create compatibility issues and may improve thermal performance in high-current applications.

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