LLS2Z391MELZ Equivalent & Substitute Parts

Part Overview

The LLS2Z391MELZ is a 390 µF, 180 V aluminum electrolytic capacitor in radial, can snap-in configuration manufactured by Nichicon. This component is rated for 3000 hours at 85°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production with full RoHS3 compliance. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, application voltage requirements, or design optimization needs.

Substiute Parts

LLS2Z391MELZ

NichiconIn Stock: 1271LLS2Z391MELZ Datasheet

Current PartRFQ

LLS2D391MELZ

NichiconIn Stock: 1230LLS2D391MELZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LLS2Z391MELZ is permissible when the following criteria are met:

Primary Substitution Criteria:

• Capacitance value: 390 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Lead spacing: 0.394" (10.00 mm) (exact match required)
• Case diameter: 0.866" (22.00 mm) (exact match required)
• Mounting type: Through Hole (exact match required)
• Package type: Radial, Can - Snap-In (exact match required)
• Operating temperature range: -40°C ~ 85°C (exact match required)
• Lifetime rating: 3000 Hrs @ 85°C (exact match required)

Voltage Rating Consideration: The rated voltage may be equal to or higher than the original specification. A substitute part with a higher voltage rating (200 V vs. 180 V) is electrically compatible and provides additional design margin. Physical dimensions may vary when voltage rating increases.

The LLS2D391MELZ meets all primary substitution criteria with an elevated voltage rating of 200 V, resulting in a maximum seated height of 1.181" (30.00 mm) compared to the original 0.984" (25.00 mm).

Parameter Comparison

Engineering Selection Recommendations

Both the LLS2Z391MELZ and LLS2D391MELZ are active production parts with full RoHS3 compliance and REACH unaffected status. Selection between these parts is determined by circuit voltage requirements and available board space.

The LLS2Z391MELZ operates at 180 V rated voltage and occupies a maximum seated height of 0.984" (25.00 mm). This part is the primary choice when the circuit voltage does not exceed 180 V and space constraints require the minimum height configuration.

The LLS2D391MELZ operates at 200 V rated voltage with a maximum seated height of 1.181" (30.00 mm). This part is suitable for circuits operating at or below 200 V and provides additional voltage margin. The increased height must be verified against available board clearance before selection.

Both parts share identical capacitance, tolerance, lead spacing, case diameter, thermal rating, and operating temperature range. The substitution is mechanically and electrically valid provided the increased height of the LLS2D391MELZ does not conflict with board layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the LLS2D391MELZ replace the LLS2Z391MELZ in a 180 V circuit?

A: Yes. The LLS2D391MELZ is rated for 200 V, which exceeds the 180 V circuit requirement. The higher voltage rating provides additional design margin and does not degrade performance in lower-voltage applications.

Q: What is the primary difference between these two parts?

A: The voltage rating differs (180 V vs. 200 V), resulting in a height difference of 0.197" (5.00 mm). All other electrical and mechanical parameters are identical.

Q: Are there any compatibility concerns with the increased height?

A: The increased seated height of the LLS2D391MELZ (1.181" vs. 0.984") must be verified against available board clearance and component placement constraints. Confirm that the additional 5.00 mm height does not interfere with adjacent components or enclosure dimensions.

Q: Do both parts have the same lead spacing and case diameter?

A: Yes. Both parts have 0.394" (10.00 mm) lead spacing and 0.866" (22.00 mm) case diameter. PCB footprints are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the LLS2Z391MELZ and LLS2D391MELZ are ROHS3 compliant and REACH unaffected.