Nichicon UAS2D221MHD Equivalent & Substitute Parts

Part Overview

The Nichicon UAS2D221MHD is a 220 µF, 200 V aluminum electrolytic capacitor in radial, can package configuration designed for general-purpose applications. This component features a 2000-hour lifetime rating at 105°C and operates across the temperature range of -40°C to 105°C. The part is currently active in production and ROHS3 compliant.

Equivalent and substitute parts are necessary when the UAS2D221MHD becomes unavailable, when design requirements demand extended operational lifetime, higher voltage ratings, or improved ripple current handling capabilities. Substitute selection must maintain electrical compatibility while considering mechanical fit and thermal performance specifications.

Key Parameters

Parameter	Value
Capacitance	220 µF
Voltage Rating	200 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-40°C to 105°C
Lead Spacing	0.295" (7.50 mm)
Case Diameter	0.709" (18.00 mm)
Height	1.319" (34.60 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UAS2D221MHD is determined by the following criteria:

Primary Compatibility Requirements:

Capacitance value: 220 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage rating: 200 V minimum (equal or higher acceptable)
Polarization: Polar (exact match required)
Mounting type: Through Hole (exact match required)
Lead spacing: 0.295" (7.50 mm) (exact match required)
Package type: Radial, Can (exact match required)

Secondary Considerations:

Case diameter and height variations are acceptable if lead spacing and mounting footprint remain unchanged
Extended lifetime ratings (beyond 2000 hours) provide enhanced reliability without affecting substitution validity
Increased ripple current ratings indicate improved thermal performance
Higher voltage ratings provide additional design margin

Substitute parts are grouped into two categories: direct upgrades (improved specifications within same footprint) and equivalent alternatives (matching electrical and mechanical specifications).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Case Dia	Height	Product Status	Ripple Current @ 120 Hz	Ripple Current @ 10/100 kHz
UAS2D221MHD	Nichicon	220 µF	200 V	2000 Hrs	0.709"	1.319"	Active	710 mA	1.136 A @ 10 kHz
UCS2E221MHD	Nichicon	220 µF	250 V	10000 Hrs	0.709"	1.299"	Active	1.565 A	3.13 A @ 100 kHz
UCY2D221MHD	Nichicon	220 µF	200 V	12000 Hrs	0.630"	1.299"	Active	1.23 A	2.46 A @ 100 kHz
UPW2D221MHD	Nichicon	220 µF	200 V	8000 Hrs	0.709"	1.575"	Obsolete	515 mA	824 mA @ 10 kHz
UVY2D221MHD	Nichicon	220 µF	200 V	2000 Hrs	0.630"	1.476"	Not For New Designs	500 mA	575 mA @ 10 kHz
UVZ2D221MHD	Nichicon	220 µF	200 V	2000 Hrs	0.709"	1.457"	Not For New Designs	575 mA	600 mA @ 10 kHz
EKMG201ELL221MMP1S	Chemi-Con	220 µF	200 V	2000 Hrs	0.709"	1.457"	Discontinued	575 mA	862.5 mA @ 100 kHz
EKXG201ELL221MM25S	Chemi-Con	220 µF	200 V	10000 Hrs	0.709"	0.984"	Active	1.05 A	2.3625 A @ 100 kHz
SEK221M200ST	Cornell Dubilier Electronics	220 µF	200 V	2000 Hrs	0.709"	1.654"	Active	575 mA	Not specified

Engineering Selection Recommendations

Direct Upgrade Path: UCS2E221MHD (Nichicon) provides the optimal upgrade path for the UAS2D221MHD. This part maintains identical lead spacing and case diameter while offering 250 V voltage rating and 10000-hour lifetime at 105°C. The increased voltage margin and extended operational life make this the preferred substitute for new designs and field replacements where board space permits the 1.299" height.

Active Product Alternatives: EKXG201ELL221MM25S (Chemi-Con KXG series) is an active production part offering 10000-hour lifetime with 200 V rating and compact 0.984" height. This part provides extended reliability with reduced vertical profile, suitable for space-constrained applications.

UCY2D221MHD (Nichicon UCY series) delivers 12000-hour lifetime at 200 V with reduced case diameter (0.630"), providing the longest operational life among active products. Height of 1.299" remains within typical PCB clearance specifications.

Obsolete and Legacy Parts: UPW2D221MHD, UVY2D221MHD, UVZ2D221MHD, and EKMG201ELL221MMP1S are not recommended for new designs. UPW2D221MHD is obsolete; UVY2D221MHD and UVZ2D221MHD are marked "Not For New Designs"; EKMG201ELL221MMP1S is discontinued at DiGi Electronics. These parts remain available for legacy system maintenance only.

Compliance Verification: All recommended substitutes maintain ROHS3 compliance and EAR99 export classification. SEK221M200ST (Cornell Dubilier) carries MSL rating of 1 (Unlimited), while Nichicon and Chemi-Con parts are not applicable for moisture sensitivity.

Frequently Asked Questions (FAQ)

Q: Can UCS2E221MHD replace UAS2D221MHD directly on the PCB? A: Yes. UCS2E221MHD maintains identical lead spacing (0.295" / 7.50 mm) and case diameter (0.709" / 18.00 mm). Height difference is 0.020" (0.50 mm) shorter, which does not affect through-hole mounting compatibility. The 250 V rating provides additional design margin over the 200 V requirement.

Q: What is the primary advantage of EKXG201ELL221MM25S? A: EKXG201ELL221MM25S offers 10000-hour lifetime (5× longer than UAS2D221MHD) with the most compact height at 0.984". This part is ideal for applications requiring extended service life or where vertical PCB clearance is limited. Lead spacing and case diameter remain compatible.

Q: Why are UVY2D221MHD and UVZ2D221MHD marked "Not For New Designs"? A: These parts are legacy products retained for existing system support only. Nichicon has superseded these with improved series offerings. New designs should specify UCY2D221MHD, UCS2E221MHD, or EKXG201ELL221MM25S.

Q: Is UPW2D221MHD still available for replacement? A: UPW2D221MHD is obsolete and should not be specified for new applications. Inventory remains available (836 pcs) for legacy system repairs only. For new designs or long-term availability, select UCS2E221MHD or UCY2D221MHD.

Q: What is the difference between Nichicon and Chemi-Con alternatives? A: Both manufacturers produce equivalent 220 µF, 200 V radial aluminum electrolytic capacitors meeting the same electrical and mechanical specifications. Nichicon UCS2E221MHD and UCY2D221MHD offer extended lifetimes (10000 and 12000 hours respectively). Chemi-Con EKXG201ELL221MM25S provides 10000-hour lifetime with compact height. Selection depends on supplier availability, cost, and specific application requirements.

Q: Can I use SEK221M200ST as a substitute? A: SEK221M200ST (Cornell Dubilier) is electrically and mechanically compatible with identical lead spacing, case diameter, and 200 V rating. However, it features the tallest profile at 1.654" and is the only part with specified ESR (900 mOhm). Use this part only when other options are unavailable or when ESR specification is a design requirement.

Q: Does higher voltage rating affect circuit operation? A: No. A capacitor with higher voltage rating (such as UCS2E221MHD at 250 V) operates safely in circuits designed for 200 V. The higher rating provides additional safety margin and typically indicates improved internal construction. Capacitance value and tolerance remain the same.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance. This ensures compatibility with modern manufacturing processes and regulatory requirements across all major markets.

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