128LMX200M2EF Equivalent & Substitute Parts Reference

Part Overview

The 128LMX200M2EF is a 1200 µF, 200 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LMX series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high capacitance and voltage ratings. The part is currently active in production with 751 pieces in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to availability constraints, design flexibility, or application-specific performance needs.

Substiute Parts

128LMX200M2EF

Cornell Dubilier / Illinois CapacitorIn Stock: 856128LMX200M2EF Datasheet

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LGR2D122MELC40

NichiconIn Stock: 274179LGR2D122MELC40 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 128LMX200M2EF is determined by strict equivalence in the following critical parameters:

Electrical Equivalence:

• Capacitance: 1200 µF (exact match required)
• Voltage Rating: 200 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)

Mechanical Equivalence:

• Package Type: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Size / Dimension: 1.378" Dia (35.00mm) (exact match required)
• Height - Seated (Max): 1.654" (42.00mm) (exact match required)
• Mounting Type: Through Hole (exact match required)

Compliance Equivalence:

• RoHS Status: ROHS3 Compliant (exact match required)
• REACH Status: REACH Unaffected (exact match required)

The substitute part LGR2D122MELC40 meets all critical electrical and mechanical parameters, enabling direct board-level substitution without design modification.

Parameter Comparison

Engineering Selection Recommendations

The LGR2D122MELC40 (Nichicon) is a direct electrical and mechanical equivalent to the 128LMX200M2EF (Cornell Dubilier). Both parts satisfy ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for equivalent component selection.

The substitute part demonstrates enhanced performance characteristics: extended operating temperature range (-40°C to 105°C versus -25°C to 105°C) and doubled lifetime rating (10000 hours versus 5000 hours at 105°C). These enhancements do not compromise compatibility and represent performance improvements within the same physical footprint and electrical specification envelope.

Both parts are active products with established supply chains. The 128LMX200M2EF maintains 751 units in stock, while the LGR2D122MELC40 has significantly higher inventory availability at 274,082 units. Selection between these parts should be based on procurement lead time, cost structure, and supply chain requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the LGR2D122MELC40 be used as a direct replacement for the 128LMX200M2EF on existing circuit boards?

A: Yes. Both parts share identical electrical ratings (1200 µF, 200 V, ±20% tolerance), identical mechanical dimensions (1.378" diameter, 1.654" height, 10.00mm lead spacing), and identical package type (radial, can-style snap-in through-hole). No board redesign or layout modification is required.

Q: Are there differences in ripple current handling between these parts?

A: The 128LMX200M2EF specifies ripple current ratings of 3.17 A @ 120 Hz and 4.66 A @ 50 kHz. The LGR2D122MELC40 specifies 2.3 A @ 120 Hz and 3.45 A @ 50 kHz. Applications requiring ripple current handling above the LGR2D122MELC40 specifications should retain the 128LMX200M2EF.

Q: What is the significance of the extended operating temperature range in the LGR2D122MELC40?

A: The LGR2D122MELC40 operates from -40°C to 105°C, compared to -25°C to 105°C for the 128LMX200M2EF. This extended lower temperature limit provides operational capability in colder environments. Applications operating only within the -25°C to 105°C range experience no functional difference.

Q: Does the doubled lifetime rating of the LGR2D122MELC40 affect component selection?

A: The LGR2D122MELC40 provides 10,000 hours at 105°C versus 5,000 hours for the 128LMX200M2EF. This represents enhanced reliability margin. Applications with extended service life requirements or high-temperature operation benefit from this specification. Both parts meet the same electrical and mechanical requirements for direct substitution.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the 128LMX200M2EF and LGR2D122MELC40 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component procurement.

Q: What is the difference in ESR (Equivalent Series Resistance) between these parts?

A: The 128LMX200M2EF specifies ESR of 207.2 mOhm @ 120 Hz. The LGR2D122MELC40 does not provide ESR specification in the available data. Applications with specific ESR requirements should verify this parameter directly with the manufacturer before substitution.