SK330M010ST Equivalent & Substitute Parts Reference

Part Overview

The SK330M010ST is a 33 µF, 10 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, can package configuration. This component is rated for general purpose applications with a 2000-hour lifetime at 85°C and an operating temperature range of -40°C to 85°C. The part maintains active product status with 827 units currently in stock.

Substitute parts are necessary when the original SK330M010ST becomes unavailable, when design requirements demand enhanced performance specifications such as higher voltage ratings or extended operational lifetimes, or when alternative manufacturers' components are preferred for supply chain optimization and cost management.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	33	µF	Critical - must match exactly
Voltage - Rated	10	V	Critical - minimum requirement
Tolerance	±20%	%	Critical - must match or be tighter
Lead Spacing	0.079" (2.00 mm)	inches (mm)	Critical - PCB layout compatibility
Size / Dimension	0.197" Dia (5.00 mm)	inches (mm)	Critical - physical fit
Height - Seated (Max)	0.512" (13.00 mm)	inches (mm)	Critical - clearance requirement
Mounting Type	Through Hole	-	Critical - assembly method
Package / Case	Radial, Can	-	Critical - form factor
Lifetime @ Temp.	2000 Hrs @ 85°C	Hours @ °C	Important - reliability consideration
Operating Temperature	-40°C ~ 85°C	°C	Important - environmental compatibility
RoHS Status	ROHS3 Compliant	-	Important - regulatory compliance
Polarization	Polar	-	Critical - circuit polarity requirement

Substitute Part Grouping Explanation

Substitute parts for the SK330M010ST are categorized into two functional groups based on electrical and mechanical compatibility:

Group 1: Direct Equivalents (Same Voltage Rating - 10V) These parts maintain the 10 V voltage rating and 33 µF capacitance of the original SK330M010ST. They are mechanically and electrically interchangeable within the same circuit application. The primary substitute in this category is UVR1A330MDD (Nichicon, Obsolete status). This part shares identical capacitance, voltage, tolerance, lead spacing, and radial can package. Height variation (0.492" vs. 0.512") must be verified for clearance compatibility in space-constrained layouts.

Group 2: Upgrade Substitutes (Higher Voltage Ratings - 25V or 35V) These parts provide enhanced voltage headroom while maintaining the 33 µF capacitance and ±20% tolerance. Upgrade substitutes include 25YXJ33M5X11 (25V), 35YXF33MEFC5X11 (35V), 35YXG33MEFC5X11 (35V), EEU-FM1V330 (35V), ESH336M035AC3AA (35V), UHD1V330MDD (35V), UKA1A330MDD (10V with extended temperature), UPM1E330MDD (25V), and UPS1V330MDD (35V). These components are suitable for applications requiring higher voltage margins or improved thermal performance characteristics.

Critical Substitution Parameters:

Capacitance: 33 µF (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.079" / 2.00 mm (exact match required)
Diameter: 0.197" / 5.00 mm (exact match required)
Mounting Type: Through Hole (exact match required)
Package: Radial, Can (exact match required)
Polarization: Polar (exact match required)
Voltage Rating: Minimum 10 V (equal or higher acceptable)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance (%)	Lifetime @ Temp.	Operating Temp. (°C)	Height - Seated (Max)	Product Status	RoHS Status
SK330M010ST	Cornell Dubilier Electronics	33	10	±20	2000 Hrs @ 85°C	-40 ~ 85	0.512" (13.00 mm)	Active	ROHS3 Compliant
UVR1A330MDD	Nichicon	33	10	±20	2000 Hrs @ 85°C	-40 ~ 85	0.492" (12.50 mm)	Obsolete	ROHS3 Compliant
UKA1A330MDD	Nichicon	33	10	±20	2000 Hrs @ 105°C	-55 ~ 105	0.492" (12.50 mm)	Obsolete	ROHS3 Compliant
25YXJ33M5X11	Rubycon	33	25	±20	5000 Hrs @ 105°C	-40 ~ 105	0.492" (12.50 mm)	Active	ROHS3 Compliant
35YXF33MEFC5X11	Rubycon	33	35	±20	5000 Hrs @ 105°C	-40 ~ 105	0.492" (12.50 mm)	Not For New Designs	ROHS3 Compliant
35YXG33MEFC5X11	Rubycon	33	35	±20	3000 Hrs @ 105°C	-40 ~ 105	0.492" (12.50 mm)	Not For New Designs	ROHS3 Compliant
EEU-FM1V330	Panasonic Electronic Components	33	35	±20	2000 Hrs @ 105°C	-40 ~ 105	0.492" (12.50 mm)	Active	ROHS3 Compliant
ESH336M035AC3AA	KEMET	33	35	±20	2000 Hrs @ 105°C	-40 ~ 105	0.492" (12.50 mm)	Active	ROHS3 Compliant
UHD1V330MDD	Nichicon	33	35	±20	2000 Hrs @ 105°C	-40 ~ 105	0.492" (12.50 mm)	Obsolete	ROHS3 Compliant
UPM1E330MDD	Nichicon	33	25	±20	2000 Hrs @ 105°C	-55 ~ 105	0.492" (12.50 mm)	Obsolete	ROHS3 Compliant
UPS1V330MDD	Nichicon	33	35	±20	2000 Hrs @ 105°C	-55 ~ 105	0.492" (12.50 mm)	Obsolete	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications):

UVR1A330MDD (Nichicon) serves as the primary direct equivalent to SK330M010ST. Both components share identical capacitance (33 µF), voltage rating (10 V), tolerance (±20%), and thermal lifetime (2000 Hrs @ 85°C). The height difference of 0.020" (0.50 mm) is within typical PCB clearance tolerances for most applications. However, UVR1A330MDD carries Obsolete product status, indicating limited future availability. This part is suitable for legacy system maintenance and repair applications where exact electrical matching is required.

For Enhanced Performance (Voltage Upgrade):

When circuit design permits higher voltage ratings, the following active-status components provide improved reliability margins:

25YXJ33M5X11 (Rubycon, Active): Recommended for applications requiring 25 V rating with extended thermal performance (5000 Hrs @ 105°C). Suitable for general purpose and consumer electronics where moderate voltage headroom is beneficial.
EEU-FM1V330 (Panasonic, Active): Recommended for 35 V applications with active product status and established supply chain availability. Provides 2000-hour lifetime at 105°C operating temperature.
ESH336M035AC3AA (KEMET, Active): Recommended for 35 V applications with active product status. Offers reliable supply availability and established manufacturing continuity.

For Extended Temperature Range Applications:

UKA1A330MDD (Nichicon, 10V) and UPM1E330MDD (Nichicon, 25V) extend the operating temperature range to -55°C to 105°C, compared to the original -40°C to 85°C specification. These components are suitable for automotive and industrial applications requiring wider temperature performance. Both carry Obsolete status.

Compliance Considerations:

All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, matching the regulatory requirements of the original SK330M010ST. All components are classified under HTSUS code 8532.22.0020 and carry EAR99 ECCN designation.

Height Clearance Verification:

The original SK330M010ST specifies a maximum seated height of 0.512" (13.00 mm). Most substitute parts measure 0.492" (12.50 mm), providing 0.020" additional clearance. In space-constrained designs, this dimensional difference may be advantageous. PCB layout verification is recommended before final component selection.

Frequently Asked Questions (FAQ)

Q1: Can I use a 35V-rated capacitor in place of the 10V SK330M010ST?

A: Yes. Higher voltage-rated capacitors are electrically compatible with lower voltage circuit requirements. A 35V capacitor will function correctly in a 10V application. The higher voltage rating provides additional safety margin and does not negatively affect circuit performance. However, physical dimensions must remain compatible with PCB layout and clearance requirements.

Q2: What is the difference between "Active," "Obsolete," and "Not For New Designs" product status?

A: Active status indicates the manufacturer continues production and supports the component for new designs. Obsolete status indicates the manufacturer has discontinued production; existing inventory may be available through distributors but future supply is not guaranteed. "Not For New Designs" indicates the manufacturer discourages use in new applications but may continue limited production for legacy support. For new designs, prioritize Active-status components.

Q3: Does the 0.020" height difference between SK330M010ST (0.512") and substitute parts (0.492") affect compatibility?

A: The height difference is typically not problematic for most applications. Standard PCB design practices include clearance margins that accommodate this variation. However, in space-constrained designs with tight component stacking or low-profile enclosures, physical verification is recommended. The original SK330M010ST's taller profile may actually be disadvantageous in compact layouts.

Q4: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance, matching the regulatory status of the original SK330M010ST. This ensures compatibility with modern manufacturing standards and environmental regulations.

Q5: What does ESR (Equivalent Series Resistance) indicate, and why does it matter?

A: ESR represents the internal resistance of the capacitor at a specified frequency. The original SK330M010ST specifies 7.64 Ohm @ 120 Hz. Lower ESR values indicate better high-frequency performance and reduced heat generation under ripple current conditions. Substitute parts with unspecified ESR values should be evaluated through manufacturer datasheets if ESR performance is critical to circuit function.

Q6: Can I substitute UVR1A330MDD (Obsolete) in a new product design?

A: UVR1A330MDD is not recommended for new product designs due to its Obsolete status. While electrically equivalent to SK330M010ST, obsolete components present supply chain risk. For new designs, select from Active-status alternatives such as EEU-FM1V330, ESH336M035AC3AA, or 25YXJ33M5X11.

Q7: What is the significance of "Ripple Current @ 120 Hz" and "Ripple Current @ 1 kHz" specifications?

A: These parameters define the maximum AC current the capacitor can safely handle at low and high frequencies without exceeding temperature limits. The original SK330M010ST supports 80 mA @ 120 Hz and 88 mA @ 1 kHz. Substitute parts with higher ripple current ratings provide additional design margin for power supply filtering and noise suppression applications.

Q8: Why do some substitute parts specify "Automotive" applications while others specify "General Purpose"?

A: Application classification reflects the intended use environment and associated qualification standards. Automotive-rated components (such as UPM1E330MDD with AEC-Q200 rating) undergo additional testing for temperature cycling, vibration, and reliability in vehicle environments. General Purpose components are suitable for consumer electronics and industrial applications with less stringent environmental requirements. Application classification does not prevent cross-use; it indicates the level of qualification testing performed.

Q9: What does "Moisture Sensitivity Level (MSL)" indicate?

A: MSL defines the component's sensitivity to moisture absorption during storage and handling. The original SK330M010ST specifies MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Most substitute parts specify "Not Applicable," indicating similar moisture-insensitive characteristics. This parameter is primarily relevant for surface-mount components; through-hole radial capacitors generally exhibit low moisture sensitivity.

Q10: Are there any electrical performance differences between Rubycon, Nichicon, Panasonic, KEMET, and Cornell Dubilier capacitors?

A: All manufacturers listed produce aluminum electrolytic capacitors meeting the specified electrical parameters (33 µF, ±20% tolerance, appropriate voltage ratings). Differences exist in ESR characteristics, ripple current handling, thermal performance, and manufacturing process consistency. Selection among manufacturers should be based on product status (Active vs. Obsolete), supply chain availability, cost considerations, and specific application requirements such as thermal lifetime or ripple current capacity.

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