477LMU250M2EC Equivalent & Substitute Parts Reference

Part Overview

The 477LMU250M2EC is a 470 µF, 250 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LMU series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring through-hole mounting. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.

Substiute Parts

477LMU250M2EC

Cornell Dubilier / Illinois CapacitorIn Stock: 805477LMU250M2EC Datasheet

Current PartRFQ

477LMH250M2BF

Cornell Dubilier / Illinois CapacitorIn Stock: 950477LMH250M2BF Datasheet

SimilarRFQ

B43254H2477M

EPCOS - TDK ElectronicsIn Stock: 942B43254H2477M Datasheet

DirectRFQ

LGJ2E471MELC20

NichiconIn Stock: 1108LGJ2E471MELC20 Datasheet

DirectRFQ

LGU2E471MELC

NichiconIn Stock: 989LGU2E471MELC Datasheet

DirectRFQ

B43252H2477M

EPCOS - TDK ElectronicsIn Stock: 961B43252H2477M Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 477LMU250M2EC is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance: 470 µF (exact match required)
• Voltage Rating: 250 V (exact match required)
• Tolerance: ±20% (exact match required)
• Operating Temperature: -40°C to 105°C (minimum range required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Polarization: Polar (exact match required)

Secondary Compatibility Factors:

• Physical dimensions (diameter and height) must accommodate existing PCB layouts
• Ripple current ratings must meet or exceed application requirements
• Lifetime rating at 105°C must be sufficient for intended service life
• RoHS and REACH compliance status for regulatory requirements

All substitute parts listed below satisfy the primary substitution criteria. Variations in ESR, ripple current capacity, and lifetime ratings are noted to enable selection based on specific application demands.

Parameter Comparison

Engineering Selection Recommendations

Direct Mechanical Equivalents (Identical Footprint):

The parts B43254H2477M and B43252H2477M from EPCOS - TDK Electronics maintain identical physical dimensions (35.00 mm diameter × 27.00 mm height) to the 477LMU250M2EC. These parts require no PCB layout modification and provide drop-in replacement capability. B43254H2477M offers extended lifetime (3000 hours at 105°C) compared to the original specification (2000 hours), providing enhanced reliability margin. B43252H2477M matches the original 2000-hour lifetime specification while maintaining active product status and ROHS3 compliance.

Mechanical Variants (Modified Footprint):

The parts LGJ2E471MELC20 and LGU2E471MELC from Nichicon satisfy all electrical parameters but feature reduced height dimensions (22.00 mm and 25.00 mm respectively versus 27.00 mm original). These parts require PCB layout verification to confirm clearance compatibility. Both offer 3000-hour lifetime ratings at 105°C and ROHS3 compliance.

The part 477LMH250M2BF from Cornell Dubilier maintains the same manufacturer lineage as the original but features a smaller diameter (22.00 mm versus 35.00 mm) and greater height (42.00 mm versus 27.00 mm). This geometry change requires PCB layout assessment before implementation.

Compliance Status:

All recommended substitute parts carry ROHS3 compliance certification and REACH unaffected status, satisfying current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can 477LMH250M2BF replace 477LMU250M2EC directly on the PCB?

A: The 477LMH250M2BF satisfies all electrical parameters but features different physical dimensions (22.00 mm diameter, 42.00 mm height versus 35.00 mm diameter, 27.00 mm height). PCB layout verification is required to confirm adequate clearance around the component location. Lead spacing remains compatible at 0.394" (10.00 mm).

Q: What is the difference between B43254H2477M and B43252H2477M?

A: Both parts maintain identical physical dimensions and electrical ratings. The primary difference is lifetime specification: B43254H2477M provides 3000 hours at 105°C, while B43252H2477M provides 2000 hours at 105°C. Both are active products with ROHS3 compliance. Selection depends on required service life for the application.

Q: Are Nichicon LGJ2E471MELC20 and LGU2E471MELC interchangeable?

A: Both parts satisfy electrical requirements but differ in height: LGJ2E471MELC20 is 22.00 mm tall, while LGU2E471MELC is 25.00 mm tall. Both offer 3000-hour lifetime at 105°C and ROHS3 compliance. PCB layout clearance must be verified for each part before selection.

Q: Why is the original 477LMU250M2EC listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Cornell Dubilier / Illinois Capacitor. Active equivalent alternatives from EPCOS - TDK Electronics and Nichicon provide continued availability with equivalent or superior electrical performance and current regulatory compliance.

Q: Do all substitute parts meet the -40°C to 105°C operating temperature range?

A: Yes. All substitute parts listed maintain the -40°C to 105°C operating temperature range specified for the original 477LMU250M2EC.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 classification indicates the component has unlimited shelf life under standard storage conditions and requires no special moisture control during handling or storage. All substitute parts maintain MSL 1 or equivalent moisture sensitivity classification.

Q: Can I use a substitute part with higher ripple current rating?

A: Yes. Substitute parts with equal or higher ripple current ratings are compatible. Higher ripple current capacity provides additional design margin and does not create incompatibility with the original application circuit.