Equivalent & Substitute Parts for LLS2W680MELZ

Part Overview

The LLS2W680MELZ is a 68 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LLS series. This radial, can-style snap-in capacitor is rated for 3000 hours at 85°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is currently active in production with ROHS3 compliance.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit applications without functional degradation.

Substiute Parts

LLS2W680MELZ

NichiconIn Stock: 729LLS2W680MELZ Datasheet

Current PartRFQ

LLS2W680MELY

NichiconIn Stock: 1664LLS2W680MELY Datasheet

SimilarRFQ

381LR680M450H012

Cornell Dubilier Electronics (CDE)In Stock: 14480381LR680M450H012 Datasheet

UpgradeRFQ

SLPX680M450A1P3

Cornell Dubilier Electronics (CDE)In Stock: 3881SLPX680M450A1P3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LLS2W680MELZ is determined by the following core parameters:

• Electrical Match: Capacitance (68 µF), voltage rating (450 V), and tolerance (±20%) must be identical
• Mechanical Compatibility: Lead spacing (10.00 mm), package type (Radial, Can - Snap-In), and mounting type (Through Hole) must match PCB footprint requirements
• Thermal Performance: Operating temperature range and lifetime rating must meet or exceed application requirements
• Compliance: RoHS and REACH status must satisfy regulatory requirements

Three substitute parts meet these criteria:

1. LLS2W680MELY (Nichicon) – Direct equivalent with identical electrical and mechanical specifications; differs only in physical dimensions (0.787" diameter, 1.181" height vs. 0.866" diameter, 0.984" height)
2. 381LR680M450H012 (Cornell Dubilier Electronics) – Upgrade substitute with enhanced thermal performance (3000 Hrs @ 105°C vs. 85°C) and identical mechanical footprint
3. SLPX680M450A1P3 (Cornell Dubilier Electronics) – Parametric equivalent with specified ESR (3.903 Ohm) and identical electrical and mechanical parameters

Parameter Comparison

Engineering Selection Recommendations

LLS2W680MELY is suitable for direct replacement when PCB layout accommodates the increased height (1.181" vs. 0.984"). This Nichicon part maintains identical electrical performance and thermal ratings while offering higher inventory availability (1631 pcs vs. 715 pcs).

381LR680M450H012 is recommended for applications requiring enhanced thermal performance or operation in elevated ambient temperatures. The extended operating range (-25°C ~ 105°C) and higher temperature lifetime rating (3000 Hrs @ 105°C) provide margin for thermally demanding environments. Physical dimensions match the original part exactly. Inventory availability is significantly higher (14396 pcs).

SLPX680M450A1P3 is applicable when ESR specification is a design requirement. The specified ESR value (3.903 Ohm) enables precise ripple current and thermal calculations. Electrical and mechanical parameters are equivalent to the original part. This option is suitable for high-frequency filtering applications where ESR performance is critical.

All three substitutes maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can LLS2W680MELY be used as a direct drop-in replacement?

A: LLS2W680MELY is electrically and mechanically compatible with identical lead spacing (10.00 mm) and package type. However, the increased height (1.181" vs. 0.984") requires verification that PCB clearance and component placement allow the taller profile. If vertical space is constrained, this substitute is not suitable.

Q: What is the advantage of 381LR680M450H012 over the original part?

A: The 381LR680M450H012 extends the operating temperature range to 105°C and maintains 3000-hour lifetime at this elevated temperature, compared to 85°C for the LLS2W680MELZ. Physical dimensions are identical, making it a direct mechanical replacement. This upgrade is beneficial for applications in high-temperature environments or where thermal margin is required.

Q: When should SLPX680M450A1P3 be selected?

A: SLPX680M450A1P3 is specified when ESR (Equivalent Series Resistance) is a design parameter. The documented ESR value of 3.903 Ohm allows precise calculation of ripple current handling and thermal performance. This part is preferred in high-frequency filtering circuits where ESR directly affects circuit performance.

Q: Are all substitutes RoHS and REACH compliant?

A: Yes. All three substitute parts (LLS2W680MELY, 381LR680M450H012, and SLPX680M450A1P3) are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original LLS2W680MELZ.

Q: What is the lead spacing requirement for PCB compatibility?

A: All substitute parts maintain 0.394" (10.00 mm) lead spacing, ensuring PCB footprint compatibility. This parameter is fixed across all options and does not require design modification.

Q: Can these parts be used interchangeably in the same application?

A: Electrical interchangeability is confirmed for all three substitutes (68 µF, 450 V, ±20% tolerance). Mechanical interchangeability depends on PCB layout constraints. LLS2W680MELY requires height clearance verification. 381LR680M450H012 and SLPX680M450A1P3 match original dimensions exactly. Thermal performance differs; 381LR680M450H012 offers extended temperature operation.