128KXM6R3MLQ

Part Overview

The 128KXM6R3MLQ is a 1200 µF, 6.3 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier / Illinois Capacitor from the KXM series. This component is classified as Active product status and is suitable for general purpose applications requiring reliable energy storage and filtering in low-voltage circuits.

Alternative models become necessary when the original part reaches end-of-life status, inventory constraints occur, or when design specifications allow for components with improved electrical characteristics such as reduced ESR (Equivalent Series Resistance) or extended operational lifetime ratings.

Substiute Parts

128KXM6R3MLQ

Cornell Dubilier / Illinois CapacitorIn Stock: 655128KXM6R3MLQ Datasheet

Current PartRFQ

UPW0J122MPD6

NichiconIn Stock: 1652UPW0J122MPD6 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 128KXM6R3MLQ is based on strict electrical and mechanical compatibility across the following parameters:

• Capacitance Value: Must equal 1200 µF (no tolerance variation acceptable for direct substitution)
• Voltage Rating: Must equal or exceed 6.3 V
• Polarization: Must be Polar (aluminum electrolytic)
• Mounting Type: Must be Through Hole
• Package Style: Must be Radial, Can configuration
• Lead Spacing: Must match 0.197" (5.00mm) for PCB hole compatibility
• Dimensional Compatibility: Physical size must not exceed the footprint requirements of the original design
• Regulatory Compliance: Must maintain ROHS3 and REACH compliance status

The substitute part UPW0J122MPD6 from Nichicon meets all mandatory electrical and mechanical parameters for direct substitution into designs currently utilizing the 128KXM6R3MLQ.

Parameter Comparison

Engineering Selection Recommendations

The UPW0J122MPD6 substitute part demonstrates full electrical and mechanical compatibility with the 128KXM6R3MLQ across all critical parameters. Both components maintain ROHS3 and REACH compliance, ensuring regulatory alignment.

The substitute part exhibits superior performance characteristics in specific areas: extended operational lifetime (5000 hours versus 4000 hours at 105°C) and significantly lower impedance (68 mOhms versus 144 mOhms), which improves high-frequency filtering performance. The physical dimensions are comparable, with the substitute part height slightly reduced (0.630" versus 0.650"), confirming board-level compatibility.

However, the UPW0J122MPD6 carries "Not For New Designs" product status, indicating Nichicon has transitioned this series away from new product development. Selection of this substitute should be limited to replacement applications or legacy system maintenance where the original 128KXM6R3MLQ is no longer available. For new design work, evaluation of currently active alternatives from the UPW series or other manufacturers is recommended based on design-specific performance requirements.

Frequently Asked Questions (FAQ)

Q: Can the UPW0J122MPD6 be used as a direct replacement for the 128KXM6R3MLQ?

A: Yes. The substitute part meets all mandatory electrical parameters (1200 µF capacitance, 6.3 V voltage rating, ±20% tolerance), operates across identical temperature ranges (-55°C to 105°C), and maintains identical mechanical specifications (0.197" lead spacing, 0.394" diameter, radial can package, through-hole mounting). Both components are ROHS3 compliant and REACH unaffected.

Q: What are the physical differences between these two capacitors?

A: The primary physical difference is seated height. The 128KXM6R3MLQ has a maximum seated height of 0.650" (16.50mm), while the UPW0J122MPD6 measures 0.630" (16.00mm). This 0.020" (0.50mm) difference poses no compatibility issues for standard PCB designs. Both maintain identical 0.394" (10.00mm) diameter can and 0.197" (5.00mm) lead spacing.

Q: How do the electrical performance characteristics compare?

A: The substitute part demonstrates lower impedance (68 mOhms versus 144 mOhms), resulting in superior high-frequency filtering. Lifetime rating is extended (5000 hours versus 4000 hours at 105°C), indicating improved long-term reliability. Ripple current handling at low frequency (120 Hz) is higher in the substitute (892.5 mA versus 858 mA), while high-frequency ripple current (100 kHz) is lower (1.05 A versus 1.43 A). These differences remain within acceptable substitution parameters for general purpose applications.

Q: Why does the UPW0J122MPD6 have "Not For New Designs" status?

A: This designation indicates that Nichicon has discontinued active development and marketing of the UPW series. The component remains in production and available for replacement purposes, but Nichicon recommends evaluating alternative current-generation product lines for new applications. Substitution is appropriate for legacy system support and repair scenarios.

Q: Are there any PCB layout considerations for this substitution?

A: No. Identical lead spacing (0.197" / 5.00mm) and similar physical dimensions (within 0.50mm height difference) ensure direct board-level compatibility. Through-hole mounting specifications are identical across both components.

Q: What compliance certifications apply to both parts?

A: Both the 128KXM6R3MLQ and UPW0J122MPD6 maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with modern environmental and safety regulations.