128KXM050M

Part Overview

The 128KXM050M is a 1200 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier / Illinois Capacitor. This component is classified as Active product status and serves applications requiring bypass and decoupling functionality. Finding alternative models becomes necessary for design optimization, inventory management, supply chain diversification, or when performance enhancements are required while maintaining electrical and mechanical compatibility.

Substiute Parts

128KXM050M

Cornell Dubilier / Illinois CapacitorIn Stock: 973128KXM050M Datasheet

Current PartRFQ

EEU-FC1H122

Panasonic Electronic ComponentsIn Stock: 2916EEU-FC1H122 Datasheet

DirectRFQ

UPW1H122MHD

NichiconIn Stock: 838UPW1H122MHD Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 128KXM050M are qualified based on the following electrical and mechanical parameters:

• Capacitance: 1200 µF (exact match required)
• Voltage Rating: 50 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Package Type: Radial, Can (exact match required)
• Lead Spacing: 0.295" (7.50mm) (exact match required)
• Diameter: 0.630" (16.00mm) (exact match required)
• Mounting: Through Hole (exact match required)
• Operating Temperature: -55°C ~ 105°C minimum (exact match or better required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

All substitute parts listed meet these core parameters, ensuring direct mechanical and electrical substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: EEU-FC1H122 (Panasonic)

The EEU-FC1H122 is the preferred substitute for new designs. It maintains Active product status, ensuring long-term availability and manufacturer support. This part carries AEC-Q200 automotive qualification, providing additional reliability assurance. The impedance improvement (28 mOhms versus 42 mOhms) and enhanced ripple current handling at low frequencies (2.16 A @ 120 Hz) deliver superior performance characteristics while meeting all electrical and mechanical substitution criteria.

Alternative Option: UPW1H122MHD (Nichicon)

The UPW1H122MHD is electrically and mechanically compatible but carries "Not For New Designs" product status. This designation restricts its use to legacy system support or ongoing production of existing designs. The extended lifetime specification (8000 Hrs @ 105°C versus 5000 Hrs) offers increased thermal endurance. Selection of this part requires justification based on existing design commitments and should not be used in new product development.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 128KXM050M with the EEU-FC1H122 without circuit modifications?

A: Yes. Both parts share identical electrical ratings (1200 µF, ±20%, 50 V) and mechanical interfaces (lead spacing, diameter, through-hole mounting). The substitute features lower impedance and higher ripple current capability, making it a direct drop-in replacement without design changes.

Q: What is the significance of the "Not For New Designs" status on the UPW1H122MHD?

A: "Not For New Designs" indicates the manufacturer has discontinued active development of this product line. While electrically and mechanically equivalent, it is restricted to sustaining production of existing designs and should not be selected for new product development due to potential future availability constraints.

Q: How do impedance differences affect circuit performance?

A: Impedance at operating frequency determines transient voltage response and ripple filtering effectiveness. The EEU-FC1H122 and UPW1H122MHD (28 mOhms) provide improved filtering compared to the 128KXM050M (42 mOhms). This advantage reduces voltage ripple in bypass and decoupling applications, enhancing overall power supply quality.

Q: Are there height clearance considerations when substituting?

A: The 128KXM050M has a maximum seated height of 1.260" (32.00mm), while both substitutes measure 1.240" (31.50mm). The substitute parts are slightly shorter, confirming mechanical compatibility with existing PCB layouts. No height-related redesign is required.

Q: Do these parts meet RoHS and regulatory compliance requirements?

A: All listed parts are ROHS3 compliant and carry EAR99 export classification. REACH status is unaffected for all variants, confirming compliance with current environmental and trade regulations.