398LMB080M2DF Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The 398LMB080M2DF is a 3900 µF, 80 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 requiring high capacitance values at moderate voltage ratings. The part is currently active in production with 930 pieces in stock. Equivalent substitute parts are identified based on matching critical electrical and mechanical parameters to ensure direct functional replacement in circuit applications.

Substiute Parts

398LMB080M2DF

Cornell Dubilier / Illinois CapacitorIn Stock: 1022398LMB080M2DF Datasheet

Current PartRFQ

LGU1K392MELB

NichiconIn Stock: 1321LGU1K392MELB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 398LMB080M2DF are identified based on the following critical parameters that determine functional equivalence:

Electrical Parameters:

• Capacitance: 3900 µF (exact match required)
• Voltage Rating: 80 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime: 3000 Hrs @ 105°C (exact match required)
• Operating Temperature Range: -40°C ~ 105°C (exact match required)

Mechanical Parameters:

• Package Type: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Physical Dimensions: 1.181" Dia (30.00mm) × 1.654" Height (exact match required)
• Mounting Type: Through Hole (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (exact match required)
• REACH Status: REACH Unaffected (exact match required)

The substitute part LGU1K392MELB manufactured by Nichicon meets all critical electrical and mechanical parameters, ensuring direct replacement capability in the 398LMB080M2DF application.

Parameter Comparison

Engineering Selection Recommendations

The LGU1K392MELB from Nichicon is a direct functional equivalent to the 398LMB080M2DF. Both parts are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

Selection between these two parts should be based on:

Availability: The 398LMB080M2DF has 930 pieces in stock, while the LGU1K392MELB has 1224 pieces available.

Ripple Current Performance: The LGU1K392MELB demonstrates higher ripple current capability at 120 Hz (3.12 A versus 2.82 A), indicating superior thermal performance characteristics in low-frequency applications.

Mechanical Compatibility: Both parts feature identical lead spacing, physical dimensions, and snap-in mounting configuration, ensuring direct PCB compatibility without layout modifications.

Compliance Status: Both parts maintain equivalent regulatory compliance, with no restrictions on use in RoHS3 or REACH-regulated markets.

Frequently Asked Questions (FAQ)

Q: Can the LGU1K392MELB directly replace the 398LMB080M2DF on existing PCBs?

A: Yes. Both capacitors share identical lead spacing (10.00mm), physical dimensions (1.181" diameter × 1.654" height), and snap-in mounting configuration. No PCB layout modifications are required.

Q: Are the electrical specifications identical between these two parts?

A: The critical electrical specifications are identical: 3900 µF capacitance, 80 V rating, ±20% tolerance, and 3000 Hrs @ 105°C lifetime. Both operate across the same temperature range (-40°C ~ 105°C). The LGU1K392MELB exhibits higher ripple current capability, which is a performance advantage.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both the 398LMB080M2DF and LGU1K392MELB are ROHS3 compliant and REACH unaffected, meeting current environmental and safety regulations for electronic components.

Q: What is the significance of the different ripple current ratings?

A: The LGU1K392MELB provides higher ripple current capacity (3.12 A @ 120 Hz versus 2.82 A), indicating enhanced thermal stability in applications with significant AC current stress. This represents a performance improvement over the original part.

Q: Are there any mechanical considerations when substituting these parts?

A: No. Both parts use identical through-hole radial, can-style snap-in packaging with matching lead spacing and physical dimensions. Installation procedures and PCB mounting requirements are identical.

Q: What is the difference between the ESR specifications?

A: The 398LMB080M2DF specifies ESR at 106.273 mOhm @ 120 Hz. The LGU1K392MELB does not provide an ESR specification in the available data. Both parts meet the same lifetime and ripple current requirements, indicating equivalent performance in typical applications.