Equivalent & Substitute Parts for 108LMU100M2CD

Part Overview

The 108LMU100M2CD is a 1000 µF, 100 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LMU series. This component is classified as obsolete, with 1081 pieces currently in stock. The capacitor is designed for general-purpose applications requiring radial, can-style snap-in mounting with through-hole configuration.

Due to the obsolete product status of the 108LMU100M2CD, equivalent and substitute parts from active manufacturers are necessary to ensure long-term supply chain continuity and design flexibility. The substitute parts listed maintain the core electrical and mechanical specifications while offering improved performance characteristics or extended product lifecycle support.

Key Parameters

Parameter	Value	Unit
Capacitance	1000	µF
Voltage - Rated	100	V
Tolerance	±20%	-
Operating Temperature Range	-40°C ~ 105°C	-
Polarization	Polar	-
Package / Case	Radial, Can - Snap-In	-
Mounting Type	Through Hole	-
Lead Spacing	0.394" (10.00mm)	-
Size / Dimension	0.984" Dia (25.00mm)	-
Height - Seated (Max)	1.260" (32.00mm)	-
Applications	General Purpose	-

Substitute Part Grouping Explanation

Substitution of the 108LMU100M2CD is determined by strict adherence to the following parameters:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 1000 µF
Voltage Rating: 100 V
Tolerance: ±20%
Polarization: Polar

Core Mechanical Parameters (Non-Negotiable):

Package / Case: Radial, Can - Snap-In
Mounting Type: Through Hole
Lead Spacing: 0.394" (10.00mm)
Height - Seated (Max): 1.260" (32.00mm)
Operating Temperature Range: -40°C ~ 105°C

Performance Parameters (Variable - Allows Substitution):

ESR (Equivalent Series Resistance)
Lifetime @ Temperature
Ripple Current ratings
Size / Dimension (minor variations within snap-in compatibility)

All substitute parts listed maintain identical core electrical and mechanical specifications. Variations in ESR, lifetime, and ripple current represent performance enhancements or equivalent performance characteristics that do not compromise circuit functionality.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	ESR @ Frequency	Lifetime @ 105°C	Product Status	Size Dia (mm)	Height (mm)
108LMU100M2CD	Cornell Dubilier / Illinois Capacitor	1000	100	±20%	248.7 mOhm @ 120Hz	2000 Hrs	Obsolete	25.00	32.00
ALC80A102BB100	KEMET	1000	100	±20%	289 mOhm @ 100Hz	6000 Hrs	Active	25.00	32.00
ALC80D102BB100	KEMET	1000	100	±20%	289 mOhm @ 100Hz	6000 Hrs	Active	25.00	32.00
B41252B9108M000	EPCOS - TDK Electronics	1000	100	±20%	Not Specified	2000 Hrs	Active	25.40	32.00
EKMH101VSN102MQ30S	Chemi-Con	1000	100	±20%	249 mOhm @ 120Hz	2000 Hrs	Active	25.40	32.00
100VXG1000MEFC25X30	Rubycon	1000	100	±20%	Not Specified	5000 Hrs	Active	25.00	32.00
381LX102M100J022	Cornell Dubilier Electronics (CDE)	1000	100	±20%	Not Specified	3000 Hrs	Active	25.00	32.00
LGU2A102MELA	Nichicon	1000	100	±20%	Not Specified	3000 Hrs	Active	25.00	32.00
LGY2A102MELA30	Nichicon	1000	100	±20%	Not Specified	5000 Hrs	Active	25.00	32.00
ELG108M100AR2AA	KEMET	1000	100	±20%	Not Specified	2000 Hrs	Active	25.00	32.00
ELG108M100VR2AA	KEMET	1000	100	±20%	Not Specified	2000 Hrs	Active	25.00	32.00

Engineering Selection Recommendations

Direct Substitutes (Equivalent Performance):

Parts maintaining identical or equivalent lifetime specifications at 105°C are suitable for direct substitution in applications where the original 108LMU100M2CD was specified:

EKMH101VSN102MQ30S (Chemi-Con): Matches 2000 Hrs @ 105°C lifetime with ESR of 249 mOhm @ 120Hz, nearly identical to the original specification. Active product status with ROHS3 compliance.
ELG108M100AR2AA and ELG108M100VR2AA (KEMET): Both maintain 2000 Hrs @ 105°C lifetime. Active product status with ROHS3 compliance. ELG108M100VR2AA is the parametric equivalent variant.

Enhanced Performance Substitutes (Extended Lifetime):

Parts with extended lifetime ratings provide improved reliability margins for long-term applications:

ALC80A102BB100 and ALC80D102BB100 (KEMET): 6000 Hrs @ 105°C lifetime. ROHS3 compliant. Active product status. ESR specification of 289 mOhm @ 100Hz is within acceptable tolerance for general-purpose applications.
100VXG1000MEFC25X30 (Rubycon): 5000 Hrs @ 105°C lifetime. ROHS3 compliant. Active product status. Maintains original 25.00mm diameter dimension.
LGY2A102MELA30 (Nichicon): 5000 Hrs @ 105°C lifetime. ROHS3 compliant. Active product status. Extended lifetime option from established manufacturer.

Equivalent Lifetime Substitutes (Alternative Sourcing):

381LX102M100J022 (Cornell Dubilier Electronics): 3000 Hrs @ 105°C lifetime. ROHS3 compliant. Active product status. Same manufacturer family as original part.
LGU2A102MELA (Nichicon): 3000 Hrs @ 105°C lifetime. ROHS3 compliant. Active product status.
B41252B9108M000 (EPCOS - TDK Electronics): 2000 Hrs @ 105°C lifetime. ROHS3 compliant. Active product status. Minor dimension variation (25.40mm diameter) remains compatible with snap-in mounting.

All listed substitutes are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Selection should be based on application lifetime requirements, supply availability, and cost considerations.

Frequently Asked Questions (FAQ)

Q1: Can I use a substitute part with a different ESR value?

A: Yes. ESR variation among substitute parts reflects different internal construction and manufacturing processes. All listed substitutes maintain ESR values within acceptable ranges for general-purpose aluminum electrolytic capacitor applications. ESR differences do not compromise circuit functionality in standard applications. For high-frequency or precision ripple current applications, consult specific circuit requirements.

Q2: What is the difference between direct substitutes and enhanced performance substitutes?

A: Direct substitutes maintain the same 2000 Hrs @ 105°C lifetime as the original 108LMU100M2CD. Enhanced performance substitutes offer extended lifetimes (3000, 5000, or 6000 Hrs @ 105°C), providing improved reliability margins. Both categories are electrically and mechanically compatible. Enhanced substitutes are recommended for applications requiring extended operational life or higher reliability margins.

Q3: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic components.

Q4: Can I use parts with different physical dimensions?

A: The substitute parts listed maintain compatible snap-in mounting configurations. Minor diameter variations (25.00mm vs. 25.40mm) do not affect snap-in compatibility. Height specifications remain constant at 32.00mm maximum. Lead spacing is standardized at 10.00mm across all parts. Physical compatibility is confirmed for all listed substitutes.

Q5: What is the significance of the KEMET ALC80 series variants (ALC80A102BB100 vs. ALC80D102BB100)?

A: Both parts are electrically and mechanically identical with 6000 Hrs @ 105°C lifetime. The designation difference (A vs. D) reflects internal manufacturing or packaging variants. Both are suitable substitutes with equivalent performance characteristics.

Q6: Which substitute should I select for maximum reliability?

A: For maximum reliability, select parts with extended lifetime ratings: ALC80A102BB100 or ALC80D102BB100 (6000 Hrs @ 105°C), 100VXG1000MEFC25X30 (5000 Hrs @ 105°C), or LGY2A102MELA30 (5000 Hrs @ 105°C). These parts provide 2.5 to 3 times longer operational life than the original specification.

Q7: Are KEMET ELG108M variants interchangeable?

A: Yes. ELG108M100AR2AA and ELG108M100VR2AA are parametric equivalents with identical electrical and mechanical specifications. Both maintain 2000 Hrs @ 105°C lifetime. Selection between variants can be based on availability or cost considerations.

Q8: Can I substitute the 108LMU100M2CD in existing PCB designs without modification?

A: Yes. All listed substitute parts maintain identical lead spacing (10.00mm), height (32.00mm maximum), and snap-in mounting configuration. Direct PCB compatibility is confirmed for all substitutes without design modification required.

Q9: What inventory levels are available for substitute parts?

A: Inventory availability varies by part number. KEMET ALC80 series parts show highest availability (273,982 pieces). Nichicon LGU2A102MELA offers substantial stock (53,961 pieces). Other substitutes maintain adequate inventory levels (932 to 2,821 pieces). Verify current availability with supplier for specific procurement requirements.

Q10: Are there performance differences in ripple current ratings among substitutes?

A: Yes. Ripple current ratings vary among substitutes, reflecting different internal construction. All listed parts maintain ripple current specifications suitable for general-purpose applications. For applications with specific ripple current requirements, consult detailed datasheets for the selected substitute part to confirm compatibility with circuit operating conditions.

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