SK2R2M160ST Equivalent & Substitute Parts Reference

Part Overview

The SK2R2M160ST is a 2.2 µF 160 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, can package configuration. This component is classified as Active product status and is designed for general-purpose applications requiring polar capacitive energy storage and filtering functions.

Equivalent and substitute parts are necessary when the original SK2R2M160ST becomes unavailable due to inventory constraints, supply chain disruptions, or when design requirements permit operation at higher voltage or temperature ratings. Substitute parts must maintain electrical compatibility through matching capacitance, tolerance, and voltage specifications while accommodating mechanical form factor variations within acceptable limits.

Key Parameters

Parameter	Value	Unit	Substitution Criticality
Capacitance	2.2	µF	Critical - Must Match
Voltage - Rated	160	V	Critical - Minimum Required
Tolerance	±20%	%	Critical - Must Match
Polarization	Polar	-	Critical - Must Match
Mounting Type	Through Hole	-	Critical - Must Match
Package / Case	Radial, Can	-	Critical - Must Match
Lead Spacing	0.098" (2.50mm)	-	Critical - Must Match
Size / Dimension	0.248" Dia (6.30mm)	-	Critical - Must Match
Height - Seated (Max)	0.512" (13.00mm)	-	Important - PCB Clearance
Operating Temperature	-25°C ~ 85°C	-	Important - Application Dependent
Lifetime @ Temp.	2000 Hrs @ 85°C	-	Important - Reliability
RoHS Status	ROHS3 Compliant	-	Important - Regulatory

Substitute Part Grouping Explanation

Substitute parts for the SK2R2M160ST are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Same Voltage Rating - 160V):

ECA-2CM2R2 (Panasonic): Maintains 160 V rating with identical capacitance and tolerance. Mechanical dimensions vary slightly in height (0.480" vs. 0.512"). All critical electrical parameters align with the original specification.

Upgrade Substitutes (Higher Voltage Ratings - 200V and 250V):

UVR2D2R2MED (Nichicon, 200V): Provides higher voltage margin with 200 V rating. Obsolete product status. Mechanical dimensions compatible.
200LEX2.2MEFC6.3X11 (Rubycon, 200V): Active product with enhanced thermal performance (4000 Hrs @ 125°C vs. 2000 Hrs @ 85°C). Identical mechanical form factor.
UVR2E2R2MED (Nichicon, 250V): Provides maximum voltage margin with 250 V rating. Obsolete product status.
225CKH250M (Cornell Dubilier, 250V): Active product from same manufacturer as original. 250 V rating with enhanced temperature operation (2000 Hrs @ 105°C).
250LEX2.2MEFC6.3X11 (Rubycon, 250V): Active product with superior thermal performance (4000 Hrs @ 125°C). Identical mechanical dimensions.
250LLE2.2MEFC6.3X11 (Rubycon, 250V): Active product with extended lifetime rating (12000 Hrs @ 105°C). Identical mechanical dimensions.

Obsolete Direct Equivalent:

UVR2C2R2MED (Nichicon, 160V): Maintains exact voltage and capacitance specifications. Obsolete product status with restricted availability.

Substitution logic is based strictly on: (1) Capacitance value match at 2.2 µF, (2) Voltage rating equal to or greater than 160 V, (3) Tolerance maintained at ±20%, (4) Polarization as Polar, (5) Through-hole radial can package, (6) Lead spacing at 2.50mm, (7) Diameter at 6.30mm, (8) Height compatibility within PCB design constraints, (9) RoHS3 compliance maintained.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance (%)	Height (mm)	Lifetime @ Temp.	Product Status	RoHS3
SK2R2M160ST	Cornell Dubilier	2.2	160	±20	13.00	2000 Hrs @ 85°C	Active	Compliant
ECA-2CM2R2	Panasonic	2.2	160	±20	12.20	2000 Hrs @ 85°C	Active	Compliant
UVR2C2R2MED	Nichicon	2.2	160	±20	12.50	2000 Hrs @ 85°C	Obsolete	Compliant
UVR2D2R2MED	Nichicon	2.2	200	±20	12.50	2000 Hrs @ 85°C	Obsolete	Compliant
200LEX2.2MEFC6.3X11	Rubycon	2.2	200	±20	13.00	4000 Hrs @ 125°C	Active	Compliant
UVR2E2R2MED	Nichicon	2.2	250	±20	12.50	2000 Hrs @ 85°C	Obsolete	Compliant
225CKH250M	Cornell Dubilier	2.2	250	±20	12.50	2000 Hrs @ 105°C	Active	Compliant
250LEX2.2MEFC6.3X11	Rubycon	2.2	250	±20	13.00	4000 Hrs @ 125°C	Active	Compliant
250LLE2.2MEFC6.3X11	Rubycon	2.2	250	±20	13.00	12000 Hrs @ 105°C	Active	Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Performance):

ECA-2CM2R2 from Panasonic is the primary direct equivalent. This part maintains identical capacitance (2.2 µF), voltage rating (160 V), and tolerance (±20%) specifications. Product status is Active with full RoHS3 compliance. Height dimension is 0.480" (12.20mm), which is 0.032" shorter than the original SK2R2M160ST at 0.512" (13.00mm). This height reduction provides additional PCB clearance margin and does not create compatibility issues in standard through-hole applications. Inventory availability is substantial at 3447 pieces.

For Voltage Margin Applications:

When circuit design permits operation at elevated voltage ratings, three active products provide enhanced reliability margins:

200LEX2.2MEFC6.3X11 (Rubycon): Provides 200 V rating with superior thermal performance (4000 Hrs @ 125°C vs. 2000 Hrs @ 85°C). Mechanical dimensions match the original exactly. Active product status with 1148 pieces in stock.
225CKH250M (Cornell Dubilier): Offers 250 V rating from the original manufacturer. Provides extended temperature operation to 105°C with 2000 Hrs lifetime rating. Height is 0.492" (12.50mm). Active product with extensive inventory (56401 pieces).
250LEX2.2MEFC6.3X11 (Rubycon): Provides 250 V rating with enhanced thermal performance (4000 Hrs @ 125°C). Mechanical dimensions identical to original. Active product status with 2581 pieces available.

For Extended Lifetime Applications:

250LLE2.2MEFC6.3X11 (Rubycon) delivers the longest operational lifetime at 12000 Hrs @ 105°C with 250 V rating. Mechanical form factor matches the original exactly. Active product with 3096 pieces in inventory. This part is suitable for applications requiring maximum component reliability over extended service periods.

Obsolete Parts (Not Recommended for New Designs):

UVR2C2R2MED, UVR2D2R2MED, and UVR2E2R2MED from Nichicon carry Obsolete product status. While inventory exists (3987, 3920, and 912 pieces respectively), these parts are not recommended for new circuit designs due to restricted long-term availability and potential supply discontinuation.

All recommended substitutes maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can ECA-2CM2R2 be used as a direct replacement for SK2R2M160ST without circuit modification?

A: Yes. ECA-2CM2R2 maintains identical electrical specifications: 2.2 µF capacitance, 160 V rating, and ±20% tolerance. The height difference of 0.032" (0.30mm) shorter does not create compatibility issues in standard through-hole PCB layouts. Both parts are Active products with full RoHS3 compliance.

Q: What is the advantage of using 250LEX2.2MEFC6.3X11 instead of the original SK2R2M160ST?

A: 250LEX2.2MEFC6.3X11 provides three engineering advantages: (1) Higher voltage rating of 250 V provides 90 V safety margin above the original 160 V specification, (2) Enhanced thermal performance with 4000 Hrs lifetime @ 125°C compared to 2000 Hrs @ 85°C, (3) Identical mechanical dimensions ensure direct PCB compatibility. This upgrade is suitable for applications requiring extended reliability or operation in elevated temperature environments.

Q: Are all substitute parts through-hole radial can packages?

A: Yes. All substitute parts listed maintain through-hole radial can package configuration with 2.50mm lead spacing and 6.30mm diameter. Mechanical compatibility is preserved across all substitutes. Height variations range from 12.20mm to 13.00mm, all within acceptable PCB clearance tolerances for standard applications.

Q: Why are Nichicon UVR series parts marked as Obsolete?

A: UVR2C2R2MED, UVR2D2R2MED, and UVR2E2R2MED carry Obsolete product status from Nichicon, indicating discontinued manufacturing and restricted future availability. While current inventory exists, these parts are not suitable for new circuit designs requiring long-term component supply assurance.

Q: Can a 250 V rated capacitor be used in a 160 V circuit?

A: Yes. Capacitors with higher voltage ratings are electrically compatible in lower voltage applications. A 250 V capacitor operates safely in a 160 V circuit. This provides voltage safety margin and is a standard engineering practice. All 250 V substitute parts (225CKH250M, 250LEX2.2MEFC6.3X11, 250LLE2.2MEFC6.3X11) are suitable for 160 V applications.

Q: What is the difference between 250LEX2.2MEFC6.3X11 and 250LLE2.2MEFC6.3X11?

A: Both parts are Rubycon 2.2 µF 250 V radial capacitors with identical mechanical dimensions. The primary difference is lifetime rating: 250LEX provides 4000 Hrs @ 125°C, while 250LLE provides 12000 Hrs @ 105°C. The LLE series offers extended operational lifetime for applications requiring maximum component reliability. Both are Active products.

Q: Is RoHS3 compliance maintained across all substitute parts?

A: Yes. All substitute parts listed maintain RoHS3 compliance status. The original SK2R2M160ST and all nine substitute parts are RoHS3 compliant, ensuring regulatory compatibility for applications subject to RoHS directives.

Q: What inventory considerations should guide part selection?

A: Current inventory levels vary significantly: 225CKH250M has the highest availability at 56401 pieces, while UVR2E2R2MED has the lowest at 912 pieces. For applications requiring immediate procurement, 225CKH250M, ECA-2CM2R2, and 250LLE2.2MEFC6.3X11 offer substantial inventory depth. Obsolete parts (UVR series) should be avoided despite current stock due to supply discontinuation risk.

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