108LMB250M2EF Equivalent & Substitute Parts Reference

Part Overview

The 108LMB250M2EF is a 1000 µF, 250 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LMB series. This radial, can-style snap-in capacitor is designed for general-purpose applications with a rated lifetime of 3000 hours at 105°C and an operating temperature range of -25°C to 105°C. The part maintains active product status with 1025 units currently in stock.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or when design requirements call for improved electrical characteristics such as lower equivalent series resistance (ESR) or extended operational lifetime.

Key Parameters

Parameter	Value	Unit
Capacitance	1000	µF
Voltage - Rated	250	V
Tolerance	±20%	-
ESR @ 120Hz	248.68	mOhm
Lifetime @ 105°C	3000	Hrs
Operating Temperature Range	-25°C to 105°C	-
Lead Spacing	10.00	mm
Diameter	35.00	mm
Height - Seated (Max)	42.00	mm
Mounting Type	Through Hole	-
Package / Case	Radial, Can - Snap-In	-
RoHS Status	ROHS3 Compliant	-
Polarization	Polar	-

Substitute Part Grouping Explanation

Substitution eligibility for the 108LMB250M2EF is determined by strict electrical and mechanical parameter matching:

Core Substitution Criteria:

Capacitance: 1000 µF (exact match required)
Voltage Rating: 250 V (exact match required)
Tolerance: ±20% (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Physical Dimensions: 35.00 mm diameter, 42.00 mm height maximum (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Secondary Compatibility Parameters:

Lifetime @ 105°C: 3000 hours minimum
Operating Temperature Range: Must encompass or exceed -25°C to 105°C
RoHS3 Compliance: Required
ESR and Ripple Current: Electrical performance characteristics that may vary within acceptable design margins

All four substitute parts meet the core substitution criteria. Variations in ESR, ripple current ratings, and operating temperature ranges represent performance enhancements or alternative specifications within the same functional category.

Parameter Comparison

Parameter	108LMB250M2EF (Main)	381LR102M250A042	381LX102M250A042	B43504A2108M000	MAL215953102E3
Manufacturer	Cornell Dubilier / Illinois Capacitor	Cornell Dubilier Electronics (CDE)	Cornell Dubilier Electronics (CDE)	EPCOS - TDK Electronics	Vishay Beyschlag/Draloric/BC Components
Series	LMB	381LR	381LX	B43504	159 PUL-SI
Capacitance	1000 µF	1000 µF	1000 µF	1000 µF	1000 µF
Voltage - Rated	250 V	250 V	250 V	250 V	250 V
Tolerance	±20%	±20%	±20%	±20%	±20%
ESR @ Reference Frequency	248.68 mOhm @ 120Hz	149 mOhm @ 120Hz	Not Specified	130 mOhm @ 100Hz	140 mOhm
Lifetime @ 105°C	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	5000 Hrs
Operating Temperature Range	-25°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-25°C to 105°C
Lead Spacing	10.00 mm	10.00 mm	10.00 mm	10.00 mm	10.00 mm
Diameter	35.00 mm	35.00 mm	35.00 mm	35.00 mm	35.00 mm
Height - Seated (Max)	42.00 mm	42.00 mm	42.00 mm	42.00 mm	42.00 mm
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Not For New Designs	Active
Inventory Status	1025 Pcs	7277 Pcs	861 Pcs	528570 Pcs	1327 Pcs

Engineering Selection Recommendations

381LR102M250A042 (Cornell Dubilier Electronics)

This substitute offers improved electrical performance with 149 mOhm ESR at 120Hz, representing a 40% reduction compared to the main part. Operating temperature range extends to -40°C, providing enhanced low-temperature capability. Product status remains active with substantial inventory availability (7277 units). This part is suitable for applications requiring lower ESR characteristics while maintaining identical mechanical and electrical specifications.

381LX102M250A042 (Cornell Dubilier Electronics)

This substitute maintains identical mechanical dimensions and core electrical specifications. Operating temperature range extends to -40°C. Ripple current ratings are lower than the main part (2.2 A @ 120Hz versus 2.56 A @ 120Hz). Product status is active with 861 units in stock. This part is suitable for general-purpose applications where extended low-temperature operation is required.

B43504A2108M000 (EPCOS - TDK Electronics)

This substitute features the lowest ESR specification at 130 mOhm @ 100Hz, representing a 48% reduction from the main part. Operating temperature range extends to -40°C. However, product status is designated "Not For New Designs," indicating this part is in mature or declining lifecycle phase. Inventory availability is substantial (528,570 units). This part is suitable only for legacy system maintenance or replacement applications where new design constraints do not apply.

MAL215953102E3 (Vishay Beyschlag/Draloric/BC Components) - Upgrade Option

This substitute represents an upgrade path with extended lifetime of 5000 hours at 105°C, compared to 3000 hours for the main part. ESR is 140 mOhm, providing 44% reduction from the main part. Operating temperature range matches the main part (-25°C to 105°C). Product status is active with 1327 units in stock. This part is suitable for applications requiring extended operational lifetime and improved thermal stability.

Frequently Asked Questions (FAQ)

Q: Can the 381LR102M250A042 be used as a direct replacement for the 108LMB250M2EF?

A: Yes. Both parts share identical capacitance (1000 µF), voltage rating (250 V), tolerance (±20%), physical dimensions (35 mm diameter, 42 mm height, 10 mm lead spacing), and package type (Radial, Can - Snap-In). The 381LR102M250A042 provides lower ESR (149 mOhm versus 248.68 mOhm) and extended operating temperature range (-40°C to 105°C versus -25°C to 105°C).

Q: What is the difference between the 381LR102M250A042 and 381LX102M250A042?

A: Both are Cornell Dubilier products with identical mechanical specifications and core electrical ratings. The primary difference is ESR specification: 381LR102M250A042 specifies 149 mOhm @ 120Hz, while 381LX102M250A042 does not specify ESR. Ripple current ratings also differ: 381LR102M250A042 provides 2.84 A @ 120Hz and 4.06 A @ 20kHz, while 381LX102M250A042 provides 2.2 A @ 120Hz and 3.1 A @ 20kHz.

Q: Why is the B43504A2108M000 marked "Not For New Designs"?

A: Product status "Not For New Designs" indicates the part is in mature lifecycle phase. While electrically and mechanically compatible, this designation reflects manufacturer policy regarding future availability and support. This part is appropriate for legacy system maintenance but should not be selected for new product development.

Q: Does the MAL215953102E3 offer advantages over other substitutes?

A: The MAL215953102E3 provides extended lifetime of 5000 hours at 105°C compared to 3000 hours for all other options. This represents a 67% increase in rated operational life. ESR is 140 mOhm, providing significant reduction from the main part. This upgrade is suitable for applications requiring extended service intervals or enhanced thermal performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (381LR102M250A042, 381LX102M250A042, B43504A2108M000, and MAL215953102E3) are ROHS3 compliant, matching the main part specification.

Q: Can these substitutes be used in applications requiring -40°C operation?

A: The 381LR102M250A042, 381LX102M250A042, and B43504A2108M000 all support -40°C to 105°C operating range. The MAL215953102E3 and main part 108LMB250M2EF support -25°C to 105°C. For applications requiring -40°C operation, select from the first three options.

Q: What is the significance of ESR differences between these parts?

A: ESR (Equivalent Series Resistance) affects ripple current handling capability and heat generation. Lower ESR values indicate better high-frequency performance and reduced thermal stress. The 381LR102M250A042 (149 mOhm), B43504A2108M000 (130 mOhm), and MAL215953102E3 (140 mOhm) all provide substantially lower ESR than the main part (248.68 mOhm), resulting in improved electrical performance in ripple-current-intensive applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message