Equivalent & Substitute Parts for LLS2V121MELZ

Part Overview

The LLS2V121MELZ is a 120 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in configuration manufactured by Nichicon. This component is classified as Active product status and is designed for general purpose applications requiring through-hole mounting. The LLS series operates across -25°C to 85°C with a rated lifetime of 3000 hours at 85°C. Substitute parts are identified to address inventory availability, extended operating temperature ranges, or upgraded voltage ratings while maintaining core electrical and mechanical compatibility.

Substiute Parts

LLS2V121MELZ

NichiconIn Stock: 865LLS2V121MELZ Datasheet

Current PartRFQ

LQS2V121MELZ25

NichiconIn Stock: 1033LQS2V121MELZ25 Datasheet

DirectRFQ

400USG120MEFCSN22X25

RubyconIn Stock: 825400USG120MEFCSN22X25 Datasheet

UpgradeRFQ

B43642A9127M000

EPCOS - TDK ElectronicsIn Stock: 1708B43642A9127M000 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Core Compatibility Requirements (Non-negotiable):

• Capacitance: 120 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Size / Dimension: 0.866" Dia (22.00mm) (exact match required)
• Height - Seated (Max): 1.063" (27.00mm) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)

Allowable Variation Parameters:

• Voltage - Rated: Equal to or greater than 350 V
• Operating Temperature: Equal to or greater than the original range
• Lifetime @ Temp.: Equal to or greater than 3000 hours
• Ripple Current: Equal to or greater than original specifications
• ESR: Lower values are acceptable

All substitute parts listed meet these criteria and maintain mechanical and electrical interchangeability with the LLS2V121MELZ.

Parameter Comparison

Engineering Selection Recommendations

LQS2V121MELZ25 (Direct Substitute - Nichicon)

This part maintains identical voltage rating (350 V) and capacitance (120 µF) as the LLS2V121MELZ. The primary distinction is the extended operating temperature range (-25°C to 105°C versus -25°C to 85°C) and corresponding lifetime rating of 3000 hours at 105°C. Both parts are manufactured by Nichicon and carry Active product status with ROHS3 compliance. This substitute is suitable for applications requiring the same voltage specification with potential thermal margin improvement.

400USG120MEFCSN22X25 (Upgrade - Rubycon)

This part provides a voltage rating upgrade to 400 V while maintaining the 120 µF capacitance and identical mechanical form factor. Manufactured by Rubycon, it is Active status and ROHS3 compliant. The 400 V rating provides increased voltage margin over the original 350 V specification. Operating temperature range remains -25°C to 85°C with 3000-hour lifetime at 85°C. This upgrade is applicable in circuits where higher voltage headroom is beneficial.

B43642A9127M000 (Upgrade - EPCOS/TDK Electronics)

This part offers both voltage upgrade (400 V) and extended operating temperature range (-40°C to 105°C). Manufactured by EPCOS - TDK Electronics, it is Active status and ROHS3 compliant with 3000-hour lifetime at 105°C. The ESR specification of 830 mOhm @ 100 Hz and impedance of 1.3 Ohms are provided. This option combines maximum thermal and voltage margin with the widest operating temperature specification.

All substitute parts maintain mechanical interchangeability and are suitable for direct PCB mounting replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can LQS2V121MELZ25 be used as a direct replacement for LLS2V121MELZ?

A: Yes. Both parts share identical capacitance (120 µF), voltage rating (350 V), tolerance (±20%), and mechanical dimensions including lead spacing (10.00mm), diameter (22.00mm), and height (27.00mm). The LQS series extends the operating temperature range to 105°C, which is a superset of the original -25°C to 85°C range.

Q: What is the difference between the 350 V and 400 V rated parts?

A: The 400USG120MEFCSN22X25 and B43642A9127M000 provide a 50 V higher voltage rating compared to the original 350 V specification. This increased voltage margin may be beneficial in circuits with voltage transients or where design margin is required. All other electrical and mechanical parameters remain compatible.

Q: Are all substitute parts through-hole mounted with snap-in configuration?

A: Yes. All listed substitutes maintain the radial, can snap-in package with through-hole mounting and identical lead spacing of 0.394" (10.00mm). No PCB layout changes are required for substitution.

Q: Which substitute offers the widest operating temperature range?

A: The B43642A9127M000 operates across -40°C to 105°C, providing the widest temperature specification. This part also combines the 400 V voltage upgrade with extended high-temperature rating of 3000 hours at 105°C.

Q: Are all parts RoHS3 compliant?

A: Yes. The main part LLS2V121MELZ and all listed substitutes (LQS2V121MELZ25, 400USG120MEFCSN22X25, B43642A9127M000) are ROHS3 compliant.

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

A: Yes, provided the circuit design accommodates the electrical characteristics of the selected substitute. Parts with higher voltage ratings (400 V) and extended temperature ranges are backward compatible with designs specified for 350 V and -25°C to 85°C operation. Verify ripple current and ESR specifications match application requirements.