SK010M450ST Equivalent & Substitute Parts

Part Overview

The SK010M450ST is a 1 µF, 450 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as Active and is designed for general-purpose applications requiring polar capacitive storage at elevated voltage ratings. The SK series capacitor features a 2000-hour lifetime rating at 85°C and operates across a temperature range of -25°C to 85°C. Substitute parts are necessary when SK010M450ST inventory is unavailable, when alternative manufacturers' components are preferred for supply chain diversification, or when design revisions require components with enhanced electrical performance characteristics within the same functional parameters.

Key Parameters

Parameter	Value	Unit	Criticality for Substitution
Capacitance	1	µF	Critical
Voltage - Rated	450	V	Critical
Tolerance	±20%	%	Critical
Polarization	Polar	-	Critical
Mounting Type	Through Hole	-	Critical
Package / Case	Radial, Can	-	Critical
Lead Spacing	0.138" (3.50mm)	-	Critical
Operating Temperature	-25°C ~ 85°C	-	Critical
Lifetime @ Temp.	2000 Hrs @ 85°C	-	Important
RoHS Status	ROHS3 Compliant	-	Important
REACH Status	REACH Unaffected	-	Important

Substitute Part Grouping Explanation

Substitution of the SK010M450ST is permissible only when replacement components maintain electrical and mechanical equivalence across all critical parameters. The substitution logic is based on the following criteria:

Critical Electrical Parameters:

Capacitance value of 1 µF (no tolerance deviation beyond ±20%)
Rated voltage of 450 V (no reduction in voltage rating)
Polar configuration (required for directional installation)
Operating temperature range of -25°C to 85°C (minimum requirement)
Lifetime rating of 2000 hours at 85°C (minimum requirement)

Critical Mechanical Parameters:

Through-hole mounting type (PCB assembly compatibility)
Radial, can package configuration (form factor compatibility)
Lead spacing of 0.138" (3.50mm) (PCB footprint compatibility)
Physical dimensions within acceptable tolerance for board layout

Compliance Parameters:

ROHS3 compliance (regulatory requirement)
REACH unaffected status (material compliance requirement)

All substitute parts listed below satisfy these critical parameters and are therefore electrically and mechanically interchangeable with the SK010M450ST in applications where these specifications are required.

Parameter Comparison

Parameter	SK010M450ST (CDE)	ECA-2WM010 (Panasonic)	UVR2W010MPD (Nichicon)
Capacitance	1 µF	1 µF	1 µF
Tolerance	±20%	±20%	±20%
Voltage - Rated	450 V	450 V	450 V
Polarization	Polar	Polar	Polar
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C
Lifetime @ Temp.	2000 Hrs @ 85°C	2000 Hrs @ 85°C	2000 Hrs @ 85°C
Lead Spacing	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)
Size / Dimension	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)	0.315" Dia (8.00mm)
Height - Seated (Max)	0.531" (13.50mm)	0.492" (12.50mm)	0.512" (13.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Not For New Designs

Engineering Selection Recommendations

ECA-2WM010 (Panasonic Electronic Components): The ECA-2WM010 is the preferred substitute for the SK010M450ST. This component maintains full electrical and mechanical equivalence across all critical parameters. The ECA-2WM010 is classified as Active, indicating continued manufacturer support and availability. ROHS3 compliance and REACH unaffected status align with regulatory requirements. The component offers higher ripple current capacity at both low frequency (37 mA @ 120 Hz) and high frequency (62.9 mA @ 10 kHz) compared to the original part, providing enhanced performance margin in ripple-current-sensitive applications. Height dimension of 0.492" (12.50mm) is within acceptable tolerance for standard PCB layouts.

UVR2W010MPD (Nichicon): The UVR2W010MPD is an acceptable substitute for the SK010M450ST with full electrical and mechanical equivalence. However, this component is classified as Not For New Designs, indicating that Nichicon has discontinued active development and marketing of this product line. While the UVR2W010MPD remains available in current inventory (3851 pcs), selection of this component is appropriate only for replacement, repair, or maintenance of existing equipment where design continuity is required. ROHS3 compliance and REACH unaffected status are maintained. The component is suitable for applications where ripple current requirements are moderate (23 mA @ 120 Hz, 36.8 mA @ 10 kHz).

For new designs and applications where long-term supply assurance is required, the ECA-2WM010 is the recommended selection.

Frequently Asked Questions (FAQ)

Q: Can the ECA-2WM010 be used as a direct replacement for the SK010M450ST without PCB modification?

A: Yes. The ECA-2WM010 maintains identical lead spacing (0.138" / 3.50mm), identical diameter (0.315" / 8.00mm), and compatible height (0.492" vs. 0.531" maximum). The component fits standard through-hole PCB footprints designed for the SK010M450ST without modification.

Q: What is the significance of the "Not For New Designs" status on the UVR2W010MPD?

A: This designation indicates that Nichicon has discontinued active product development for the UVR series. While the component remains available and functional, it is not recommended for incorporation into new product designs due to uncertain long-term availability and potential future discontinuation. The UVR2W010MPD is appropriate for field replacement and maintenance applications only.

Q: Are there differences in electrical performance between the SK010M450ST and its substitutes?

A: All three components share identical capacitance (1 µF), voltage rating (450 V), tolerance (±20%), and lifetime rating (2000 Hrs @ 85°C). The ECA-2WM010 and UVR2W010MPD differ in ripple current capacity and ESR characteristics. The ECA-2WM010 provides higher ripple current handling (37 mA @ 120 Hz vs. 19 mA for the SK010M450ST), which may be advantageous in high-ripple applications. ESR data for the substitute parts is not provided in the specification; contact manufacturers for detailed ESR values if this parameter is critical to your application.

Q: Do all three components meet the same regulatory compliance standards?

A: Yes. The SK010M450ST, ECA-2WM010, and UVR2W010MPD are all ROHS3 compliant and REACH unaffected. All three components carry identical ECCN (EAR99) and HTSUS (8532.22.0020) classifications.

Q: What is the maximum height difference between the SK010M450ST and its substitutes?

A: The SK010M450ST has a maximum seated height of 0.531" (13.50mm). The ECA-2WM010 measures 0.492" (12.50mm), and the UVR2W010MPD measures 0.512" (13.00mm). All three components fit within standard component clearance envelopes for radial aluminum electrolytic capacitors. Verify clearance in your specific PCB layout if height-constrained applications are involved.

Q: Can these components be used interchangeably in existing equipment?

A: Yes. All three components are mechanically and electrically equivalent for the specified parameters. Substitution in existing equipment does not require design changes or PCB modifications. Ensure proper polarity orientation during installation, as all three components are polar capacitors.

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