UCS2W180MND9 Equivalent & Substitute Parts

Part Overview

The UCS2W180MND9 is an 18 µF, 450 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 10,000 hours at 105°C and is designed for general-purpose applications requiring high voltage energy storage and filtering.

The UCS2W180MND9 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Capacitance	18 µF
Voltage Rating	450 V
Tolerance	±20%
Lifetime @ 105°C	10,000 Hrs
Operating Temperature Range	-25°C to 105°C
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.138" (4.60 mm)
Size / Diameter	0.315" (8.00 mm)
Height (Seated, Max)	2.047" (52.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the UCS2W180MND9 must satisfy the following electrical and mechanical criteria:

Electrical Requirements:

Capacitance: 18 µF (exact match)
Voltage Rating: 450 V (exact match)
Tolerance: ±20% (exact match)
Polarization: Polar (exact match)
Operating Temperature Range: Must encompass or match -25°C to 105°C

Mechanical Requirements:

Package Type: Radial, Can (exact match)
Mounting Type: Through Hole (exact match)
Lead Spacing: 0.138" (4.60 mm) or compatible spacing
Physical Dimensions: Compatible with PCB layout constraints

Compliance Requirements:

RoHS3 Compliant (mandatory)

Two substitute parts meet these criteria: the UPT2W180MHD (Nichicon) and the 450QXW18MEFR8X35 (Rubycon). Both maintain identical electrical specifications while differing in lifetime rating, physical dimensions, and operating temperature range.

Parameter Comparison

Parameter	UCS2W180MND9 (Main)	UPT2W180MHD (Substitute)	450QXW18MEFR8X35 (Substitute)
Manufacturer	Nichicon	Nichicon	Rubycon
Series	UCS	UPT	QXW
Capacitance	18 µF	18 µF	18 µF
Voltage Rating	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%
Lifetime @ 105°C	10,000 Hrs	5,000 Hrs	2,000 Hrs
Operating Temperature	-25°C to 105°C	-25°C to 105°C	-40°C to 105°C
Polarization	Polar	Polar	Polar
Lead Spacing	0.138" (4.60 mm)	0.197" (5.00 mm)	0.138" (4.60 mm)
Size / Diameter	0.315" (8.00 mm)	0.492" (12.50 mm)	0.315" (8.00 mm)
Height (Seated, Max)	2.047" (52.00 mm)	1.043" (26.50 mm)	1.457" (37.00 mm)
Ripple Current @ 120 Hz	Not specified	180 mA	190 mA
Ripple Current @ 10 kHz	Not specified	288 mA	285 mA
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

UPT2W180MHD (Nichicon): This substitute maintains identical electrical specifications and operating temperature range as the UCS2W180MND9. The primary trade-off is reduced lifetime (5,000 hours versus 10,000 hours at 105°C). Physical dimensions differ significantly: the UPT2W180MHD is larger in diameter (0.492" versus 0.315") and lead spacing (0.197" versus 0.138"), requiring PCB layout verification. This part is currently active and ROHS3 compliant, ensuring ongoing availability and regulatory compliance.

450QXW18MEFR8X35 (Rubycon): This substitute matches the physical footprint and lead spacing of the UCS2W180MND9, simplifying PCB integration. The operating temperature range extends to -40°C, providing broader environmental tolerance. However, lifetime is significantly reduced to 2,000 hours at 105°C. This part is currently active and ROHS3 compliant. The extended lower temperature rating may benefit applications requiring cold-start operation.

Selection Criteria:

For applications prioritizing extended operational life and identical form factor: 450QXW18MEFR8X35
For applications where lifetime reduction is acceptable and PCB layout can accommodate larger dimensions: UPT2W180MHD
Both substitutes are active products with confirmed supply availability and full regulatory compliance

Frequently Asked Questions (FAQ)

Q: Can the UPT2W180MHD be used as a direct replacement without PCB modification?

A: No. The UPT2W180MHD has different physical dimensions and lead spacing (0.197" versus 0.138"). PCB layout verification is required to confirm compatibility with existing through-hole pad patterns and clearance constraints.

Q: Can the 450QXW18MEFR8X35 be used as a direct replacement without PCB modification?

A: Yes, regarding physical footprint. The 450QXW18MEFR8X35 maintains identical lead spacing (0.138") and similar diameter (0.315") as the UCS2W180MND9, allowing direct PCB mounting without layout changes.

Q: What is the impact of reduced lifetime ratings in the substitute parts?

A: The UCS2W180MND9 is rated for 10,000 hours at 105°C. The UPT2W180MHD provides 5,000 hours, and the 450QXW18MEFR8X35 provides 2,000 hours at the same temperature. Lifetime reduction directly affects component reliability in continuous-duty applications. Applications with intermittent duty cycles or lower operating temperatures may tolerate reduced lifetime ratings.

Q: Are both substitute parts RoHS3 compliant?

A: Yes. Both the UPT2W180MHD and 450QXW18MEFR8X35 are ROHS3 compliant, meeting current regulatory requirements for hazardous substance restrictions.

Q: What is the difference in ripple current handling between the main part and substitutes?

A: The UCS2W180MND9 ripple current specifications are not provided. The UPT2W180MHD handles 180 mA at 120 Hz and 288 mA at 10 kHz. The 450QXW18MEFR8X35 handles 190 mA at 120 Hz and 285 mA at 10 kHz. Both substitutes provide

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