SN100M025ST Equivalent & Substitute Parts

Part Overview

The SN100M025ST is a 10 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 and substitute parts essential for ongoing system support and component procurement.

The SN100M025ST serves general-purpose applications requiring through-hole mounting with bi-polar polarization. Due to its obsolete status, sourcing alternatives from active product lines is necessary to maintain supply chain continuity and ensure long-term availability for maintenance and production requirements.

Substiute Parts

SN100M025ST

Cornell Dubilier Electronics (CDE)In Stock: 837SN100M025ST Datasheet

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ECE-A1HN100U

Panasonic Electronic ComponentsIn Stock: 50096ECE-A1HN100U Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN100M025ST is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Capacitance: 10 µF (exact match required)
• Tolerance: ±20% (matching tolerance specification)
• Operating Temperature Range: -40°C ~ 85°C (minimum requirement)
• Polarization: Bi-Polar (functional requirement)
• Mounting Type: Through Hole (mechanical requirement)
• Package / Case: Radial, Can (form factor requirement)
• Lead Spacing: 0.098" (2.50mm) (PCB layout requirement)

Allowable Substitution Parameter:

• Voltage - Rated: The substitute part may have equal or higher voltage rating than the original 25 V specification. Higher voltage ratings provide enhanced electrical margin and are functionally compatible in circuits designed for 25 V operation.

The ECE-A1HN100U from Panasonic Electronic Components meets all mandatory criteria and provides an upgraded voltage rating of 50 V, making it a direct substitute for the obsolete SN100M025ST.

Parameter Comparison

Engineering Selection Recommendations

The ECE-A1HN100U is the qualified substitute for the obsolete SN100M025ST based on the following engineering factors:

Compliance and Availability: The ECE-A1HN100U maintains ROHS3 compliance, matching the environmental and regulatory requirements of the original part. As an active product from Panasonic Electronic Components, it provides assured long-term availability and supply chain stability, addressing the critical limitation of the obsolete SN100M025ST.

Electrical Compatibility: Both parts share identical capacitance (10 µF), tolerance (±20%), operating temperature range (-40°C ~ 85°C), and polarization (Bi-Polar). The ECE-A1HN100U provides a 50 V rated voltage compared to the original 25 V specification. This higher voltage rating is functionally compatible and introduces no adverse effects in circuits designed for 25 V operation.

Mechanical Compatibility: Lead spacing (0.098" / 2.50mm) is identical, ensuring direct PCB footprint compatibility. Physical dimensions show minor increases in diameter (6.30mm vs. 6.00mm) and height (11.20mm vs. 11.00mm), which remain within typical PCB layout tolerances for through-hole radial capacitors.

Certification Status: Both parts are ROHS3 compliant. The substitute part carries REACH Unaffected status, providing additional regulatory assurance for applications subject to chemical substance restrictions.

Frequently Asked Questions (FAQ)

Q: Can the ECE-A1HN100U directly replace the SN100M025ST without PCB modifications?

A: Yes. The ECE-A1HN100U maintains identical lead spacing (0.098" / 2.50mm) and through-hole mounting configuration. Physical dimension increases (diameter and height) are minor and compatible with standard PCB layout tolerances for radial capacitors. No PCB rework is required.

Q: Why does the substitute part have a higher voltage rating (50 V vs. 25 V)?

A: Higher voltage ratings in capacitors provide increased electrical margin and reliability in the application circuit. A 50 V rated capacitor functions correctly in a 25 V circuit and introduces no compatibility issues. This is a standard engineering practice for component substitution.

Q: Are there any performance differences between the SN100M025ST and ECE-A1HN100U?

A: Both parts share identical capacitance (10 µF), tolerance (±20%), and operating temperature range (-40°C ~ 85°C). The ECE-A1HN100U specifies a lifetime of 2000 Hrs @ 85°C compared to 1000 Hrs @ 85°C for the original part, indicating enhanced reliability. Ripple current specifications are identical at 50 mA @ 120 Hz.

Q: What is the significance of the "Active" product status for the ECE-A1HN100U?

A: Active product status indicates that the ECE-A1HN100U is currently manufactured and supported by Panasonic Electronic Components. This ensures ongoing availability for procurement, technical support, and supply chain continuity. The obsolete status of the SN100M025ST makes this substitution necessary for long-term system support.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN100M025ST and ECE-A1HN100U are ROHS3 compliant. The substitute part additionally carries REACH Unaffected status, providing compliance with additional regulatory frameworks.

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

A: Both parts specify 0.098" (2.50mm) lead spacing, which defines the distance between the two radial leads. This specification is critical for PCB footprint compatibility and ensures that the substitute part fits existing circuit board designs without modification.