SK220M025ST Equivalent & Substitute Parts Reference

Part Overview

The SK220M025ST is a 22 µF, 25 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, can package configuration. This component is rated for general-purpose applications with an operating temperature range of -40°C to 85°C and a lifetime specification of 2000 hours at 85°C. The part maintains Active product status with 1317 units currently in stock.

Substitute parts are necessary when the SK220M025ST becomes unavailable, when design requirements demand enhanced performance characteristics such as higher voltage ratings or extended lifetime specifications, or when alternative manufacturers' components are preferred for supply chain diversification and cost optimization.

Key Parameters

Parameter	Value	Unit	Substitution Criticality
Capacitance	22	µF	Critical - Must Match
Voltage Rating	25	V	Critical - Minimum Required
Tolerance	±20%	%	Critical - Must Match
Polarization	Polar	-	Critical - Must Match
Lead Spacing	0.079" (2.00mm)	inches (mm)	Critical - PCB Layout
Package Type	Radial, Can	-	Critical - Must Match
Mounting Type	Through Hole	-	Critical - Must Match
Operating Temperature	-40°C ~ 85°C	°C	Critical - Application Dependent
Lifetime @ Temperature	2000	Hrs @ 85°C	Important - Reliability
RoHS Status	ROHS3 Compliant	-	Important - Regulatory

Substitute Part Grouping Explanation

Substitute parts for the SK220M025ST are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Same Voltage Rating - 25V): Direct substitutes maintain the 25 V voltage rating, 22 µF capacitance, ±20% tolerance, and radial through-hole package configuration. These parts are interchangeable at the circuit level without design modification. Direct equivalents include:

ECA-1EM220 (Panasonic)
ESMG250ELL220ME11D (Chemi-Con)
UVR1E220MDD (Nichicon)
UVR1E220MDD1TD (Nichicon, Tape & Box packaging)

Upgrade Substitutes (Higher Voltage Rating - 50V): Upgrade substitutes increase the voltage rating to 50 V while maintaining 22 µF capacitance, ±20% tolerance, and radial through-hole package. These parts are electrically compatible and provide enhanced voltage margin. Upgrade substitutes include:

226CKH050M (Cornell Dubilier/Illinois Capacitor)
226CKR050M (Cornell Dubilier/Illinois Capacitor)
226KBM050M (Cornell Dubilier/Illinois Capacitor)
226KXM050M (Cornell Dubilier/Illinois Capacitor)
50PK22MEFC5X11 (Rubycon)
50YXF22MEFC5X11 (Rubycon)

Substitution Logic: All substitute parts maintain the critical parameters: 22 µF capacitance, ±20% tolerance, polar configuration, 0.079" (2.00mm) lead spacing, radial can package, and through-hole mounting. Voltage rating substitution follows the principle that a higher-rated capacitor (50 V) is electrically compatible with a 25 V circuit application. Physical dimensions remain consistent across all substitutes to ensure PCB footprint compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance (%)	ESR (Ohm)	Lifetime @ Temp	Operating Temp (°C)	Lead Spacing (mm)	Height Max (mm)	Product Status	RoHS
SK220M025ST	Cornell Dubilier	22	25	±20	8.44	2000 Hrs @ 85°C	-40 ~ 85	2.00	13.00	Active	ROHS3
ECA-1EM220	Panasonic	22	25	±20	-	2000 Hrs @ 85°C	-40 ~ 85	2.00	12.00	Active	ROHS3
ESMG250ELL220ME11D	Chemi-Con	22	25	±20	-	2000 Hrs @ 85°C	-40 ~ 85	2.00	12.50	Active	ROHS3
UVR1E220MDD	Nichicon	22	25	±20	-	2000 Hrs @ 85°C	-40 ~ 85	2.00	12.50	Obsolete	ROHS3
UVR1E220MDD1TD	Nichicon	22	25	±20	-	2000 Hrs @ 85°C	-40 ~ 85	2.50	12.50	Obsolete	ROHS3
226CKH050M	Cornell Dubilier	22	50	±20	7.536	2000 Hrs @ 105°C	-40 ~ 105	2.00	12.50	Active	ROHS3
226CKR050M	Cornell Dubilier	22	50	±20	7.536	2000 Hrs @ 85°C	-40 ~ 85	2.00	12.50	Active	ROHS3
226KBM050M	Cornell Dubilier	22	50	±20	7.5357	5000 Hrs @ 105°C	-40 ~ 105	2.00	12.50	Active	ROHS3
226KXM050M	Cornell Dubilier	22	50	±20	7.5357	2000 Hrs @ 105°C	-55 ~ 105	2.00	12.50	Active	ROHS3
50PK22MEFC5X11	Rubycon	22	50	±20	-	2000 Hrs @ 85°C	-40 ~ 85	2.00	12.50	Active	ROHS3
50YXF22MEFC5X11	Rubycon	22	50	±20	-	5000 Hrs @ 105°C	-40 ~ 105	2.00	12.50	Last Time Buy	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications):

When the SK220M025ST requires immediate substitution with identical electrical performance, select from Active-status direct equivalents: ECA-1EM220 (Panasonic) or ESMG250ELL220ME11D (Chemi-Con). Both parts maintain 25 V rating, 22 µF capacitance, ±20% tolerance, and 2000-hour lifetime at 85°C. ECA-1EM220 offers slightly reduced height (12.00 mm vs. 13.00 mm), which may provide PCB layout advantages. ESMG250ELL220ME11D maintains 12.50 mm height with comparable ripple current performance.

Avoid UVR1E220MDD and UVR1E220MDD1TD due to Obsolete product status, which indicates discontinued manufacturing and potential future supply constraints.

For Voltage Margin Enhancement:

When circuit design permits or requires higher voltage rating, upgrade substitutes provide enhanced reliability margins. Select 226CKR050M (Cornell Dubilier) for direct manufacturer continuity with Active status, 50 V rating, and 2000-hour lifetime at 85°C. This part maintains identical lead spacing (2.00 mm) and similar height (12.50 mm) for seamless PCB integration.

For extended lifetime applications, 226KBM050M or 50YXF22MEFC5X11 provide 5000-hour lifetime at 105°C, supporting long-term reliability requirements. 226KXM050M extends operating temperature range to -55°C ~ 105°C for extreme environment applications.

Compliance Verification:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with the original SK220M025ST specification.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated capacitor in place of a 25 V rated capacitor?

A: Yes. A higher voltage-rated capacitor is electrically compatible with lower voltage applications. The 50 V substitutes (226CKR050M, 226KBM050M, 226KXM050M, 50PK22MEFC5X11, 50YXF22MEFC5X11) function correctly in 25 V circuits and provide additional voltage safety margin. Physical dimensions remain compatible with PCB layouts designed for the SK220M025ST.

Q: What is the difference between direct equivalents and upgrade substitutes?

A: Direct equivalents (ECA-1EM220, ESMG250ELL220ME11D, UVR1E220MDD) maintain the 25 V voltage rating and are electrically identical to the SK220M025ST. Upgrade substitutes increase voltage rating to 50 V while maintaining 22 µF capacitance and ±20% tolerance. Upgrade substitutes are compatible with 25 V applications but provide enhanced voltage margin and often extended lifetime specifications.

Q: Why are UVR1E220MDD and UVR1E220MDD1TD marked as Obsolete?

A: Obsolete status indicates that Nichicon has discontinued manufacturing these parts. While existing inventory may be available, future procurement cannot be guaranteed. Active-status alternatives (ECA-1EM220, ESMG250ELL220ME11D, 226CKR050M) are recommended for new designs and long-term supply security.

Q: Does lead spacing affect PCB compatibility?

A: Yes. The SK220M025ST specifies 0.079" (2.00 mm) lead spacing. Most direct equivalents and upgrade substitutes maintain this spacing. However, UVR1E220MDD1TD uses 0.098" (2.50 mm) lead spacing and requires PCB layout verification before substitution. Confirm lead spacing against your PCB design before component selection.

Q: What is the significance of ESR (Equivalent Series Resistance)?

A: ESR affects ripple current handling and thermal performance. The SK220M025ST specifies 8.44 Ohm ESR. Direct equivalents do not provide ESR specifications in available data. Upgrade substitutes specify ESR values between 7.536 and 7.5357 Ohm, indicating comparable or slightly improved performance. For ripple-current-sensitive applications, verify ripple current ratings at your operating frequency.

Q: Can I substitute 50YXF22MEFC5X11 if it shows Last Time Buy status?

A: 50YXF22MEFC5X11 is available with 123,550 units in current inventory and offers 5000-hour lifetime at 105°C. Last Time Buy status indicates Rubycon will discontinue this part after current inventory depletes. This part is suitable for immediate applications but not recommended for long-term production programs. For sustained supply, select Active-status alternatives such as 226KBM050M or 226KXM050M.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the regulatory compliance of the SK220M025ST. This ensures compatibility with environmental and regulatory requirements across global markets.

Q: What packaging options are available?

A: The SK220M025ST is supplied in Bulk packaging. Direct equivalents ECA-1EM220, ESMG250ELL220ME11D, and most upgrade substitutes are available in Bulk packaging. UVR1E220MDD1TD is available in Tape & Box (TB) packaging, which may affect handling and assembly processes. Confirm packaging requirements with your procurement and assembly operations before selection.

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