UML1C220MDD Equivalent & Substitute Parts

Part Overview

The UML1C220MDD is a 22 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon (ML series). This component is rated for 1000 hours at 85°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production with 957 units in stock.

Equivalent and substitute parts are necessary when the original component becomes unavailable, when design requirements demand extended operational lifetime, or when alternative packaging and lead spacing configurations are required for specific PCB layouts.

Key Parameters

Parameter	Value
Capacitance	22 µF
Voltage Rating	16 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Lead Spacing	0.079" (2.00mm)
Case Diameter	0.197" (5.00mm)
Height (Seated Max)	0.236" (6.00mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UML1C220MDD is determined by strict equivalence in the following electrical and mechanical parameters:

Mandatory Equivalence Parameters:

Capacitance: 22 µF (exact match required)
Voltage Rating: 16 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

Allowable Variation Parameters:

Lifetime @ Temperature: May exceed 1000 Hrs @ 85°C
Operating Temperature Range: May exceed -40°C ~ 85°C
Lead Spacing: Variations permitted (0.059", 0.079", 0.098", 0.197")
Case Diameter: Variations permitted (0.157" to 0.197")
Height: Variations permitted (within through-hole PCB constraints)
Ripple Current: Variations permitted (higher values acceptable)
Packaging Format: Bulk, Cut Tape (CT) acceptable

Substitute parts are grouped into three categories: direct equivalents with identical lead spacing and height, similar parts with different lead spacing or height, and parametric equivalents with extended lifetime ratings.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp	Lead Spacing	Case Dia	Height Max	Status
UML1C220MDD	Nichicon	ML	22 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.079" (2.00mm)	0.197" (5.00mm)	0.236" (6.00mm)	Active
UVR1C220MDD1TA	Nichicon	UVR	22 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.197" (5.00mm)	0.492" (12.50mm)	Obsolete
16MH522MEFC5X5	Rubycon	MH5	22 µF	16 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.079" (2.00mm)	0.197" (5.00mm)	0.256" (6.50mm)	Obsolete
ECA-1CM220	Panasonic	M-A	22 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.079" (2.00mm)	0.197" (5.00mm)	0.472" (12.00mm)	Active
ECA-1CM220B	Panasonic	M-A	22 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.197" (5.00mm)	0.472" (12.00mm)	Active
ECA-1CM220I	Panasonic	M-A	22 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.197" (5.00mm)	0.472" (12.00mm)	Active
ECE-A1CKA220	Panasonic	KA	22 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.059" (1.50mm)	0.157" (4.00mm)	0.276" (7.00mm)	Active
ECE-A1CKA220B	Panasonic	KA	22 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.157" (4.00mm)	0.315" (8.00mm)	Active
ECE-A1CKA220I	Panasonic	KA	22 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.157" (4.00mm)	0.315" (8.00mm)	Active
SK220M016ST	Cornell Dubilier Electronics (CDE)	SK	22 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.079" (2.00mm)	0.197" (5.00mm)	0.512" (13.00mm)	Active
ECE-A1CKS220	Panasonic	KS	22 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.079" (2.00mm)	0.197" (5.00mm)	0.236" (6.00mm)	Active

Engineering Selection Recommendations

Direct Mechanical and Electrical Equivalents (Identical Lead Spacing and Height):

ECE-A1CKS220 (Panasonic, KS series) is the closest parametric equivalent to UML1C220MDD. Both parts share identical lead spacing (0.079" / 2.00mm), case diameter (0.197" / 5.00mm), and height (0.236" / 6.00mm). Both are rated for 1000 hours at 85°C and are ROHS3 compliant. This part is currently active in production with 8,137 units in stock.

Extended Lifetime Alternatives (Same Lead Spacing, Increased Height):

ECA-1CM220 (Panasonic, M-A series) provides doubled lifetime (2000 hours at 85°C) while maintaining the same lead spacing (0.079" / 2.00mm) and case diameter (0.197" / 5.00mm). Height increases to 0.472" (12.00mm). This part is active with 40,423 units in stock.

SK220M016ST (Cornell Dubilier Electronics, SK series) also provides 2000-hour lifetime at 85°C with matching lead spacing (0.079" / 2.00mm) and case diameter (0.197" / 5.00mm). Height is 0.512" (13.00mm). This part is active with 1,008 units in stock and includes specified ESR of 9.65 Ohm.

Alternative Lead Spacing Options (Compact Case Variants):

ECE-A1CKA220 series (Panasonic, KA series) offers compact case dimensions (0.157" / 4.00mm diameter) with multiple lead spacing options: 0.059" (1.50mm), 0.197" (5.00mm), or 0.098" (2.50mm). All variants are rated for 1000 hours at 85°C and are currently active. These parts are suitable for space-constrained PCB layouts.

Obsolete Parts (Not Recommended for New Designs):

UVR1C220MDD1TA (Nichicon, UVR series) and 16MH522MEFC5X5 (Rubycon, MH5 series) are marked as obsolete and should not be selected for new designs despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute UML1C220MDD with any 22 µF, 16 V aluminum electrolytic capacitor?

A: No. Substitution requires exact match of capacitance (22 µF), voltage rating (16 V), tolerance (±20%), polarization (polar), mounting type (through-hole), and package type (radial, can). Lead spacing and height may vary based on PCB layout constraints.

Q: What is the difference between the UML1C220MDD and ECE-A1CKS220?

A: Both parts are electrically and mechanically identical with 22 µF capacitance, 16 V rating, ±20% tolerance, 1000-hour lifetime at 85°C, and identical lead spacing (0.079" / 2.00mm) and height (0.236" / 6.00mm). The primary difference is manufacturer: Nichicon (UML1C220MDD) versus Panasonic (ECE-A1CKS220).

Q: Why would I choose ECA-1CM220 over UML1C220MDD?

A: ECA-1CM220 doubles the operational lifetime to 2000 hours at 85°C while maintaining the same lead spacing (0.079" / 2.00mm). This is beneficial for applications requiring extended reliability. The trade-off is increased height (0.472" versus 0.236"), which requires PCB layout verification.

Q: Are the compact ECE-A1CKA220 variants direct replacements?

A: ECE-A1CKA220 variants are electrically equivalent but have different mechanical dimensions. Case diameter is reduced to 0.157" (4.00mm) and height varies by lead spacing variant. These parts are suitable only if PCB layout accommodates the smaller case diameter and specific lead spacing.

Q: What does "lead spacing" mean and why does it matter?

A: Lead spacing is the distance between the two radial leads on the capacitor. Common spacings are 0.059" (1.50mm), 0.079" (2.00mm), 0.098" (2.50mm), and 0.197" (5.00mm). The PCB footprint must match the lead spacing of the selected component. Mismatched lead spacing prevents proper mounting.

Q: Can I use an obsolete part like UVR1C220MDD1TA?

A: Obsolete parts should not be used in new designs. While UVR1C220MDD1TA meets electrical specifications, its obsolete status means future availability cannot be guaranteed and manufacturer support is discontinued.

Q: What is the significance of ROHS3 compliance?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances Directive requirements, restricting lead, mercury, cadmium, and other hazardous materials. All listed substitute parts are ROHS3 compliant, ensuring regulatory compliance for EU and similar markets.

Q: Does operating temperature range affect substitution?

A: Operating temperature range may exceed the original specification. UML1C220MDD operates from -40°C to 85°C. The Rubycon 16MH522MEFC5X5 extends this to -40°C to 105°C, providing wider temperature tolerance. This is an allowable variation that does not prevent substitution.

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