LKX2G121MESA25 Equivalent & Substitute Parts

Part Overview

The LKX2G121MESA25 is a 120 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 2000 hours at 105°C and is designed for audio applications. The part is currently active in production with 982 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and application-specific performance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

LKX2G121MESA25

NichiconIn Stock: 1025LKX2G121MESA25 Datasheet

Current PartRFQ

LGG2W121MELA25

NichiconIn Stock: 847LGG2W121MELA25 Datasheet

UpgradeRFQ

LGNW6121MELA25

NichiconIn Stock: 975LGNW6121MELA25 Datasheet

UpgradeRFQ

LKX2G121MESY35

NichiconIn Stock: 1198LKX2G121MESY35 Datasheet

SimilarRFQ

450MXG120MEFCSN25X25

RubyconIn Stock: 4245450MXG120MEFCSN25X25 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LKX2G121MESA25 are classified based on the following substitution criteria:

Upgrade Substitutes maintain or exceed the electrical performance of the main part while offering improved specifications:

• LGG2W121MELA25: Higher voltage rating (450 V vs. 400 V), same capacitance and tolerance, identical physical dimensions and lead spacing
• LGNW6121MELA25: Higher voltage rating (420 V vs. 400 V), extended lifetime (3000 Hrs vs. 2000 Hrs @ 105°C), same capacitance and tolerance, identical physical dimensions and lead spacing
• 450MXG120MEFCSN25X25: Higher voltage rating (450 V vs. 400 V), extended lifetime (3000 Hrs vs. 2000 Hrs @ 105°C), same capacitance and tolerance, identical physical dimensions and lead spacing, manufactured by Rubycon

Similar Substitute maintains electrical specifications with dimensional variation:

• LKX2G121MESY35: Identical capacitance, voltage, tolerance, and lifetime; same manufacturer (Nichicon) and series (LKX); different case diameter (0.787" vs. 0.984") and height (1.457" vs. 1.063")

All substitute parts share the following critical parameters with the main part:

• Capacitance: 120 µF
• Tolerance: ±20%
• Lead Spacing: 0.394" (10.00 mm)
• Mounting Type: Through Hole
• Package Type: Radial, Can - Snap-In
• Operating Temperature Range: -25°C ~ 105°C
• RoHS3 Compliance

Parameter Comparison

Engineering Selection Recommendations

Selection of substitute parts for the LKX2G121MESA25 is determined by application voltage requirements, thermal lifetime expectations, and physical space constraints:

For applications requiring higher voltage margin: LGG2W121MELA25 or 450MXG120MEFCSN25X25 provide 450 V rating, suitable for circuits operating near the 400 V limit of the original part. Both maintain identical physical dimensions (25.00 mm diameter, 27.00 mm height) and lead spacing.

For applications requiring extended thermal lifetime: LGNW6121MELA25 or 450MXG120MEFCSN25X25 offer 3000 hours at 105°C, compared to 2000 hours for the main part. Both are ROHS3 compliant and maintain identical physical dimensions and lead spacing.

For space-constrained applications with identical electrical specifications: LKX2G121MESY35 maintains the same capacitance, voltage, tolerance, and lifetime as the main part but occupies a smaller footprint (20.00 mm diameter, 37.00 mm height). This part is suitable only when vertical space is available and horizontal space is limited.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can LGG2W121MELA25 be used as a direct replacement for LKX2G121MESA25?

A: Yes, LGG2W121MELA25 is a direct physical and electrical substitute. It maintains identical capacitance (120 µF), tolerance (±20%), physical dimensions (25.00 mm diameter, 27.00 mm height), and lead spacing (10.00 mm). The higher voltage rating (450 V vs. 400 V) provides additional safety margin in the circuit.

Q: What is the difference between upgrade substitutes and similar substitutes?

A: Upgrade substitutes offer improved electrical performance (higher voltage rating or extended lifetime) while maintaining or exceeding physical compatibility. Similar substitutes maintain electrical specifications but may have dimensional variations. LKX2G121MESY35 is classified as a similar substitute due to its different case diameter and height.

Q: Is LKX2G121MESY35 compatible with the same PCB footprint as LKX2G121MESA25?

A: No. LKX2G121MESY35 has different physical dimensions (20.00 mm diameter vs. 25.00 mm, and 37.00 mm height vs. 27.00 mm). While lead spacing remains identical (10.00 mm), the case diameter difference requires PCB layout verification before substitution.

Q: Can 450MXG120MEFCSN25X25 (Rubycon) replace the Nichicon LKX2G121MESA25?

A: Yes. 450MXG120MEFCSN25X25 is a direct physical substitute with identical dimensions (25.00 mm diameter, 27.00 mm height) and lead spacing (10.00 mm). It offers higher voltage rating (450 V) and extended lifetime (3000 Hrs @ 105°C). Both parts are ROHS3 compliant.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: capacitance value (120 µF), tolerance (±20%), lead spacing (10.00 mm), mounting type (through hole), package type (radial, can snap-in), and operating temperature range (-25°C ~ 105°C). Physical dimensions (case diameter and height) must be verified against PCB layout constraints.

Q: Are all substitute parts in stock?

A: Inventory status varies. LGG2W121MELA25 has 813 units, LGNW6121MELA25 has 893 units, LKX2G121MESY35 has 1150 units, and 450MXG120MEFCSN25X25 has 4222 units in stock.