SN220M025ST Equivalent & Substitute Parts Reference

Part Overview

The SN220M025ST is a 22 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and component procurement.

The SN220M025ST serves general-purpose applications requiring through-hole mounting with bi-polar polarization. Due to its obsolete status, sourcing direct replacements from active product lines is necessary to maintain supply chain continuity and ensure long-term availability for repair, maintenance, and new production builds.

Substiute Parts

SN220M025ST

Cornell Dubilier Electronics (CDE)In Stock: 919SN220M025ST Datasheet

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ECE-A1HN220U

Panasonic Electronic ComponentsIn Stock: 2056ECE-A1HN220U Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN220M025ST is determined by strict alignment of the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Capacitance value: 22 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage rating: Equal to or greater than 25 V
• Operating temperature range: -40°C ~ 85°C (minimum requirement)
• Polarization: Bi-Polar (exact match required)

Mechanical Compatibility Criteria:

• Mounting type: Through Hole (exact match required)
• Package / Case: Radial, Can (exact match required)
• Lead spacing: 0.138" (3.50 mm) (exact match required)
• Size / Dimension: 0.315" Dia (8.00 mm) (exact match required)
• Height - Seated (Max): 0.453" (11.50 mm) (exact match required)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant (minimum requirement)

The ECE-A1HN220U from Panasonic Electronic Components meets all substitution criteria. This part maintains identical mechanical dimensions and lead spacing, ensuring direct board-level compatibility. The rated voltage of 50 V exceeds the original 25 V specification, providing enhanced voltage margin. The capacitance value, tolerance, polarization, and mounting configuration are identical to the SN220M025ST.

Parameter Comparison

Engineering Selection Recommendations

The ECE-A1HN220U is a direct functional substitute for the SN220M025ST based on the following engineering criteria:

Electrical Equivalence: Both components share identical capacitance (22 µF), tolerance (±20%), and bi-polar polarization. The ECE-A1HN220U operates across the same temperature range (-40°C ~ 85°C) as the original part.

Mechanical Compatibility: Lead spacing, package dimensions, and mounting configuration are identical between the two parts, enabling direct board-level replacement without PCB modification.

Voltage Margin: The ECE-A1HN220U is rated for 50 V, compared to the SN220M025ST's 25 V rating. This higher voltage rating provides additional safety margin in applications operating at or near the original 25 V specification.

Reliability Enhancement: The ECE-A1HN220U offers 2000 hours lifetime at 85°C, compared to 1000 hours for the SN220M025ST, indicating improved long-term reliability characteristics.

Compliance Status: The ECE-A1HN220U maintains ROHS3 compliance and is currently in active production, ensuring sustained availability for procurement and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the ECE-A1HN220U be used as a direct replacement for the SN220M025ST on existing PCBs?

A: Yes. The ECE-A1HN220U is mechanically and electrically compatible with the SN220M025ST. Both components have identical lead spacing (0.138" / 3.50 mm), package dimensions (0.315" Dia / 8.00 mm), and height (0.453" / 11.50 mm). No PCB modification is required.

Q: What is the significance of the higher voltage rating on the ECE-A1HN220U?

A: The ECE-A1HN220U is rated for 50 V, while the SN220M025ST is rated for 25 V. In applications operating at 25 V or below, the higher voltage rating of the substitute part provides additional voltage margin and does not negatively impact performance. The capacitance and tolerance remain identical.

Q: Are there any differences in ripple current handling between these two parts?

A: The ripple current specifications are comparable. The SN220M025ST handles 86 mA @ 120 Hz, while the ECE-A1HN220U handles 90 mA @ 120 Hz. Both parts are suitable for general-purpose applications with similar ripple current requirements.

Q: Why is the ECE-A1HN220U recommended over the obsolete SN220M025ST?

A: The SN220M025ST is classified as obsolete, making long-term procurement difficult. The ECE-A1HN220U is in active production status, ensuring reliable availability for current and future orders. Additionally, the ECE-A1HN220U offers improved lifetime characteristics (2000 Hrs @ 85°C vs. 1000 Hrs @ 85°C).

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN220M025ST and ECE-A1HN220U are ROHS3 compliant. Both carry the same ECCN (EAR99) and HTSUS (8532.22.0020) classifications.

Q: What is the lead spacing specification, and why is it important for substitution?

A: Both parts have a lead spacing of 0.138" (3.50 mm). This specification is critical for substitution because it determines whether the component will fit into existing through-hole PCB footprints without modification. Identical lead spacing ensures direct board-level compatibility.