398LMB050M2BF Equivalent & Substitute Parts

Part Overview

The 398LMB050M2BF is a 3900 µF, 50 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 in a compact form factor. The part is currently active in production with 786 units in stock.

Substitute parts are identified when equivalent electrical and mechanical specifications are met, allowing for component interchangeability in circuit designs. Substitution becomes necessary due to supply chain availability, manufacturing discontinuation, or inventory optimization across multiple qualified suppliers.

Substiute Parts

398LMB050M2BF

Cornell Dubilier / Illinois CapacitorIn Stock: 851398LMB050M2BF Datasheet

Current PartRFQ

LGU1H392MELZ

NichiconIn Stock: 1878LGU1H392MELZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 398LMB050M2BF is based on strict equivalence of the following parameters:

• Capacitance Value: 3900 µF (exact match required)
• Voltage Rating: 50 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime Specification: 3000 Hrs @ 105°C (exact match required)
• Operating Temperature Range: -40°C ~ 105°C (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Physical Dimensions: 0.866" Dia × 1.654" Height (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)

The substitute part LGU1H392MELZ from Nichicon meets all of these criteria, establishing it as a parametric equivalent for direct substitution in applications requiring the 398LMB050M2BF.

Parameter Comparison

Engineering Selection Recommendations

Both the 398LMB050M2BF and LGU1H392MELZ are active production parts with full RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

The 398LMB050M2BF (Cornell Dubilier / Illinois Capacitor) is the primary specification. The LGU1H392MELZ (Nichicon) is a direct parametric equivalent suitable for substitution where supply or inventory considerations apply.

Selection between these parts should be based on:

• Availability: Current inventory levels and lead times from respective suppliers
• Supply Chain Requirements: Preferred vendor agreements or qualification status within your organization
• Regulatory Compliance: Both parts meet identical compliance standards (RoHS3, REACH, EAR99)
• Cost Considerations: Unit pricing and volume discounts from each manufacturer
• Mechanical Fit: Both parts are identical in physical dimensions and mounting configuration, ensuring direct PCB compatibility

No additional testing or qualification is required when substituting between these parts, as all electrical and mechanical parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can the LGU1H392MELZ replace the 398LMB050M2BF in existing designs?

A: Yes. The LGU1H392MELZ is a parametric equivalent with identical capacitance (3900 µF), voltage rating (50 V), tolerance (±20%), lifetime specification (3000 Hrs @ 105°C), operating temperature range (-40°C ~ 105°C), and physical dimensions (0.866" Dia × 1.654" Height). Both parts use the same radial, can-style snap-in package with 0.394" (10.00mm) lead spacing, ensuring direct PCB compatibility.

Q: Are there any differences in electrical performance between these parts?

A: The ripple current specifications differ slightly. The 398LMB050M2BF specifies 2.23 A @ 120 Hz and 2.788 A @ 10 kHz. The LGU1H392MELZ specifies 2.25 A @ 120 Hz and 2.5875 A @ 50 kHz. These variations are within normal manufacturing tolerances for aluminum electrolytic capacitors and do not affect functional equivalence in general-purpose applications.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the 398LMB050M2BF and LGU1H392MELZ are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8532.22.0040. They meet identical regulatory requirements for use in electronic equipment.

Q: What is the physical compatibility between these parts?

A: Both parts are identical in physical dimensions and mounting configuration. They feature the same 0.866" diameter can, 1.654" maximum seated height, and 0.394" (10.00mm) lead spacing. Both use through-hole mounting with radial, can-style snap-in packaging. Direct PCB substitution is possible without any mechanical modifications.

Q: Which part should I select for new designs?

A: Selection should be based on supplier availability, inventory levels, cost, and your organization's vendor qualification status. Both parts are active production items with equivalent specifications. Consult your procurement department for preferred supplier information and current pricing.

Q: Is the ±20% tolerance acceptable for my application?

A: Tolerance acceptance depends on your circuit design requirements. Both parts share the same ±20% tolerance specification. If tighter tolerance is required, consult the manufacturers' full product lines for alternative capacitance values or tolerance grades.