Equivalent & Substitute Parts for SN221M025ST

Part Overview

The SN221M025ST is a 220 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing applications. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 1000 hours at 85°C and an equivalent series resistance of 900 mOhm at 120 Hz. Substitution is required due to product discontinuation while maintaining functional compatibility in general-purpose applications.

Substiute Parts

SN221M025ST

Cornell Dubilier Electronics (CDE)In Stock: 933SN221M025ST Datasheet

Current PartRFQ

ECE-A1VN221U

Panasonic Electronic ComponentsIn Stock: 1057ECE-A1VN221U Datasheet

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ECE-A1EN221U

Panasonic Electronic ComponentsIn Stock: 9912ECE-A1EN221U Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN221M025ST is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance value: 220 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage rating: 25 V minimum (equal or higher voltage rating acceptable)
• Package type: Radial, Can (exact match required)
• Mounting type: Through Hole (exact match required)
• Lead spacing: 0.197" (5.00 mm) (exact match required)
• Operating temperature range: -40°C to 85°C (minimum requirement)
• Polarization: Bi-Polar (exact match required)
• RoHS compliance: ROHS3 Compliant (required for regulatory alignment)

Substitute Categories:

Upgrade Substitute: ECE-A1VN221U provides identical capacitance and tolerance with elevated voltage rating (35 V) and extended lifetime (2000 hours at 85°C). This part is suitable for applications where higher voltage margin and improved reliability are beneficial.

Similar Substitute: ECE-A1EN221U provides identical capacitance, tolerance, and voltage rating (25 V) with extended lifetime (2000 hours at 85°C) and improved ripple current specifications. This part maintains electrical equivalence with enhanced performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Electrical Equivalence):

ECE-A1EN221U is the direct electrical equivalent of SN221M025ST. Both parts share identical capacitance (220 µF), tolerance (±20%), and voltage rating (25 V). The ECE-A1EN221U is manufactured by Panasonic Electronic Components with active product status, ensuring long-term availability. Both parts are ROHS3 compliant and maintain the same operating temperature range (-40°C to 85°C). The ECE-A1EN221U provides extended lifetime (2000 hours at 85°C versus 1000 hours) and improved ripple current specifications at high frequency (544 mA @ 10 kHz). Physical dimensions differ slightly; the ECE-A1EN221U has a smaller diameter (0.394" versus 0.512") and reduced height (0.630" versus 0.787"), which may require PCB layout verification.

For Upgraded Performance:

ECE-A1VN221U offers elevated voltage rating (35 V versus 25 V) with extended lifetime (2000 hours at 85°C). This part is suitable for applications requiring additional voltage margin or enhanced reliability. The ECE-A1VN221U maintains identical capacitance and tolerance with the same lead spacing and through-hole mounting configuration. Physical dimensions are intermediate between the main part and the similar substitute (0.492" diameter, 0.787" height). ROHS3 compliance and active product status ensure regulatory alignment and supply continuity.

Compliance and Availability:

Both substitute parts are ROHS3 compliant and manufactured by Panasonic Electronic Components with active product status. Inventory availability is confirmed for both alternatives, supporting immediate component procurement.

Frequently Asked Questions (FAQ)

Q: Can ECE-A1VN221U be used as a direct replacement for SN221M025ST?

A: ECE-A1VN221U is functionally compatible as a substitute. Both parts share identical capacitance (220 µF), tolerance (±20%), and lead spacing (0.197" / 5.00 mm). The ECE-A1VN221U provides higher voltage rating (35 V versus 25 V), which is acceptable in applications designed for 25 V operation. Physical dimensions differ slightly; verification of PCB layout clearance is required before implementation.

Q: What is the difference between ECE-A1VN221U and ECE-A1EN221U?

A: Both parts are Panasonic aluminum electrolytic capacitors with 220 µF capacitance and ±20% tolerance. ECE-A1VN221U has 35 V rating with 0.492" diameter and 0.787" height. ECE-A1EN221U has 25 V rating (matching the original part) with 0.394" diameter and 0.630" height. Both provide 2000-hour lifetime at 85°C. Selection depends on voltage requirement and available PCB space.

Q: Are the substitute parts physically compatible with the original PCB layout?

A: Lead spacing (0.197" / 5.00 mm) is identical for all three parts, ensuring through-hole compatibility. However, can diameter and height differ. SN221M025ST: 0.512" diameter, 0.787" height. ECE-A1VN221U: 0.492" diameter, 0.787" height. ECE-A1EN221U: 0.394" diameter, 0.630" height. PCB layout verification is required to confirm clearance around component mounting area.

Q: Do the substitute parts meet RoHS requirements?

A: Both ECE-A1VN221U and ECE-A1EN221U are ROHS3 compliant, matching the compliance status of the original SN221M025ST. All three parts are suitable for applications requiring RoHS compliance.

Q: What is the product status of the substitute parts?

A: SN221M025ST is obsolete. ECE-A1VN221U and ECE-A1EN221U are both active products manufactured by Panasonic Electronic Components, ensuring long-term availability and supply continuity.

Q: How do ripple current specifications compare?

A: SN221M025ST: 390 mA @ 120 Hz. ECE-A1VN221U: 360 mA @ 120 Hz, 612 mA @ 10 kHz. ECE-A1EN221U: 320 mA @ 120 Hz, 544 mA @ 10 kHz. Ripple current capacity is application-dependent; selection should be based on actual circuit requirements.

Q: Can both substitute parts be used interchangeably in the same application?

A: Both parts are functionally compatible with SN221M025ST based on capacitance, tolerance, voltage rating, and mounting configuration. Selection between ECE-A1VN221U and ECE-A1EN221U depends on voltage margin requirements and available PCB space. Physical dimensions must be verified against PCB layout constraints.