109CKE025MLAD Equivalent & Substitute Parts Reference

Part Overview

The 109CKE025MLAD is a 10000 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 with 1100 pieces in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct replacement in circuit designs without functional compromise.

Substiute Parts

109CKE025MLAD

Cornell Dubilier / Illinois CapacitorIn Stock: 1194109CKE025MLAD Datasheet

Current PartRFQ

25PX10000MEFC18X35.5

RubyconIn Stock: 211125PX10000MEFC18X35.5 Datasheet

DirectRFQ

UBY1E103MHL

NichiconIn Stock: 999UBY1E103MHL Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 109CKE025MLAD are qualified based on the following criteria:

Electrical Parameters (Critical):

• Capacitance: 10000 µF (exact match required)
• Voltage Rating: 25 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)

Mechanical Parameters (Critical):

• Lead Spacing: 7.50 mm (exact match required for PCB hole alignment)
• Diameter: 18.00 mm (exact match required for mechanical fit)
• Height: Must not exceed 36.50 mm maximum seated height
• Mounting Type: Through Hole (exact match required)
• Package: Radial, Can (exact match required)

Environmental & Compliance Parameters:

• Operating Temperature Range: Must cover or exceed -40°C to 105°C
• RoHS Status: ROHS3 Compliant (regulatory requirement)

Two substitute parts meet these criteria and are listed below.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Substitute: 25PX10000MEFC18X35.5 (Rubycon PX Series)

The Rubycon 25PX10000MEFC18X35.5 qualifies as a direct equivalent substitute. All critical electrical and mechanical parameters match the 109CKE025MLAD specification. The part maintains identical capacitance (10000 µF), voltage rating (25 V), tolerance (±20%), lead spacing (7.50 mm), and diameter (18.00 mm). The seated height of 37.00 mm exceeds the original 36.50 mm maximum by 0.50 mm; this represents a minor dimensional variance within typical PCB design tolerances for through-hole components. The operating temperature range of -55°C to 105°C covers the original specification. Both parts are ROHS3 compliant and REACH unaffected. This substitute is suitable for direct replacement in bypass and decoupling applications.

Enhanced Performance Substitute: UBY1E103MHL (Nichicon UBY Series)

The Nichicon UBY1E103MHL qualifies as an enhanced performance substitute with superior electrical characteristics. All critical parameters match: capacitance (10000 µF), voltage rating (25 V), tolerance (±20%), lead spacing (7.50 mm), and diameter (18.00 mm). The seated height of 37.00 mm matches the Rubycon alternative. The UBY1E103MHL offers improved performance through lower ESR (19 mOhm @ 100 kHz versus 54.7 mOhm @ 120 Hz on the original), higher ripple current capability (3.75 A @ 100 kHz), extended lifetime (3000 hours @ 135°C versus 2000 hours @ 105°C), and wider operating temperature range (-40°C to 135°C). The part is ROHS3 compliant. REACH status is listed as affected, requiring verification of specific substance compliance in regulated applications. This substitute is suitable for applications requiring enhanced thermal performance or lower impedance characteristics.

Selection Basis:

Both substitutes maintain full electrical and mechanical compatibility with the original 109CKE025MLAD. Selection between them depends on application requirements: the Rubycon part provides direct equivalence with identical performance characteristics, while the Nichicon part provides enhanced performance metrics for demanding thermal or high-frequency ripple current environments.

Frequently Asked Questions (FAQ)

Q: Can the 25PX10000MEFC18X35.5 be used as a direct replacement for the 109CKE025MLAD?

A: Yes. The Rubycon 25PX10000MEFC18X35.5 is a direct equivalent substitute. All critical electrical parameters (capacitance, voltage, tolerance, polarization) and mechanical parameters (lead spacing, diameter, mounting type, package) are identical. The seated height difference of 0.50 mm (37.00 mm versus 36.50 mm) is within standard PCB design tolerances for through-hole components.

Q: What is the difference between the Rubycon and Nichicon substitutes?

A: Both parts are electrically and mechanically compatible with the original. The Nichicon UBY1E103MHL offers enhanced performance: lower ESR (19 mOhm @ 100 kHz), higher ripple current (3.75 A @ 100 kHz), extended lifetime (3000 hours @ 135°C), and wider operating temperature range (-40°C to 135°C). The Rubycon 25PX10000MEFC18X35.5 provides direct equivalence with identical performance characteristics to the original part.

Q: Are there any height clearance concerns with the substitute parts?

A: Both substitute parts have a maximum seated height of 37.00 mm, compared to the original 36.50 mm. This 0.50 mm increase is within standard mechanical tolerances for through-hole radial capacitors. Verify available vertical clearance in your specific PCB assembly to confirm compatibility.

Q: Do the substitute parts meet the same regulatory compliance as the original?

A: Both substitutes are ROHS3 compliant, matching the original part. The Rubycon part is REACH unaffected, identical to the original. The Nichicon part is REACH affected; applications subject to REACH regulations require verification of specific substance compliance before selection.

Q: What are the ripple current differences between the parts?

A: The original 109CKE025MLAD supports 2.5 A @ 120 Hz and 3.5 A @ 100 kHz. The Rubycon 25PX10000MEFC18X35.5 supports 2.05 A @ 120 Hz and 2.3575 A @ 10 kHz. The Nichicon UBY1E103MHL supports 3.188 A @ 120 Hz and 3.75 A @ 100 kHz. Select based on your circuit's ripple current requirements at the operating frequency.

Q: Can these parts be used interchangeably in automotive applications?

A: The Nichicon UBY1E103MHL is specified for automotive applications. The Rubycon and original Cornell Dubilier parts are specified for general purpose and bypass/decoupling applications respectively. Verify application-specific requirements before selection.

Q: What is the significance of ESR differences?

A: ESR (Equivalent Series Resistance) affects impedance and heat generation. The original part specifies 54.7 mOhm @ 120 Hz. The Nichicon substitute specifies 19 mOhm @ 100 kHz, indicating lower impedance at high frequency. The Rubycon part does not specify ESR. Lower ESR is beneficial in high-frequency ripple current applications and reduces thermal stress.