SK331M025ST Equivalent & Substitute Parts Reference

Part Overview

The SK331M025ST is a 330 µF, 25 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, through-hole configuration. This component is classified as Active product status and serves general-purpose applications requiring stable capacitance and extended operational life. The SK series capacitor features a 560 mOhm equivalent series resistance (ESR) and 2000-hour lifetime rating at 85°C, making it suitable for power supply filtering, energy storage, and signal coupling applications in industrial and consumer electronics.

Substitute parts become necessary when the primary SK331M025ST reaches end-of-life inventory constraints, when supply chain disruptions occur, or when design flexibility permits selection from alternative manufacturers offering equivalent electrical and mechanical performance within the same parameter envelope.

Substiute Parts

SK331M025ST

Cornell Dubilier Electronics (CDE)In Stock: 705SK331M025ST Datasheet

Current PartRFQ

UVR1E331MPD

NichiconIn Stock: 10752UVR1E331MPD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SK331M025ST is determined by strict alignment with the following electrical and mechanical parameters:

Electrical Criteria:

• Capacitance value must equal 330 µF
• Voltage rating must equal or exceed 25 V
• Tolerance must be ±20% or tighter
• Operating temperature range must encompass -40°C to 85°C
• Lifetime rating must meet or exceed 2000 hours at 85°C

Mechanical Criteria:

• Lead spacing must equal 0.197" (5.00 mm) for PCB hole alignment
• Diameter must equal 0.394" (10.00 mm)
• Height must not exceed 0.591" (15.00 mm) to ensure clearance compatibility
• Mounting type must be Through Hole
• Package configuration must be Radial, Can

Compliance Criteria:

• RoHS3 compliance required
• REACH Unaffected status required

The substitute part UVR1E331MPD from Nichicon meets all electrical and mechanical criteria. Although classified as "Not For New Designs," this part maintains full parameter equivalence with the SK331M025ST and serves as a direct functional replacement for existing applications and inventory replenishment.

Parameter Comparison

Engineering Selection Recommendations

For Active Production and New Designs: The SK331M025ST remains the primary component selection due to its Active product status, ensuring long-term availability and manufacturer support. This part is recommended for all new circuit designs and production builds where supply is available.

For Inventory Replenishment and Existing Applications: The UVR1E331MPD serves as a direct electrical and mechanical equivalent when SK331M025ST inventory is constrained. Despite its "Not For New Designs" classification, this Nichicon part maintains full parameter compliance and RoHS3 certification, making it suitable for replacement in existing applications and field service scenarios.

Compliance Verification: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for industrial and consumer electronics applications. The UVR1E331MPD's reduced height (0.551" versus 0.591") provides additional clearance margin in space-constrained PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can UVR1E331MPD be used as a direct replacement for SK331M025ST in existing circuit boards?

A: Yes. The UVR1E331MPD matches all critical electrical parameters (330 µF, 25 V, ±20% tolerance, 2000 Hrs @ 85°C) and mechanical specifications (lead spacing, diameter, through-hole mounting, radial can package). The substitute part's reduced height (0.551" versus 0.591") ensures compatibility with existing PCB layouts.

Q: Why is UVR1E331MPD marked "Not For New Designs"?

A: This classification reflects Nichicon's product lifecycle management and does not indicate technical deficiency. The part meets all electrical and mechanical requirements. The designation typically indicates the manufacturer's intention to phase out this series in favor of newer alternatives. For existing applications and inventory replenishment, this part remains fully functional and compliant.

Q: Are there differences in ESR (Equivalent Series Resistance) between these parts?

A: The SK331M025ST specifies 560 mOhm ESR. The UVR1E331MPD ESR value is not provided in the available technical data. ESR differences may affect ripple current handling and thermal performance in high-frequency switching applications. Verify ESR specifications with the manufacturer if ripple current performance is critical to your application.

Q: Do both parts have identical lead spacing for PCB hole alignment?

A: Yes. Both parts specify 0.197" (5.00 mm) lead spacing, ensuring direct PCB compatibility without layout modifications.

Q: What is the moisture sensitivity level for these capacitors?

A: The SK331M025ST has MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The UVR1E331MPD lists MSL as Not Applicable, which is consistent with through-hole aluminum electrolytic capacitors that do not require moisture-controlled storage.

Q: Are both parts suitable for high-temperature applications?

A: Both parts operate across -40°C to 85°C and maintain 2000-hour lifetime at 85°C. For applications requiring extended operation at maximum temperature, verify that the circuit design accounts for capacitance drift and ESR increase at elevated temperatures.