SN331M010ST Equivalent & Substitute Parts

Part Overview

The SN331M010ST is a 330 µF, 10 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can package configuration. This component is designated as obsolete product status. Finding substitute components is necessary due to the obsolescence of this original part number, requiring equivalent alternatives that meet the electrical and mechanical requirements of the original design.

Substiute Parts

SN331M010ST

Cornell Dubilier Electronics (CDE)In Stock: 1145SN331M010ST Datasheet

Current PartRFQ

ECE-A1CN331U

Panasonic Electronic ComponentsIn Stock: 1096ECE-A1CN331U Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN331M010ST is based on matching the following critical electrical and mechanical parameters:

Electrical Parameters:

• Capacitance: 330 µF (required)
• Tolerance: ±20% (required)
• Voltage rating: Equal to or greater than 10 V (minimum requirement)
• Operating temperature range: -40°C ~ 85°C (required)
• Polarization: Bi-Polar (required)

Mechanical Parameters:

• Package type: Radial, Can (required)
• Mounting type: Through Hole (required)
• Lead spacing: 0.197" (5.00mm) (required)
• Size / Dimension: 0.394" Dia (10.00mm) (required)
• RoHS Status: ROHS3 Compliant (required)

The ECE-A1CN331U meets all critical substitution criteria while providing enhanced specifications in voltage rating and lifetime, making it a direct replacement for the SN331M010ST in the same form factor.

Parameter Comparison

Engineering Selection Recommendations

The ECE-A1CN331U serves as a qualified substitute for the SN331M010ST based on the following engineering considerations:

Compliance: Both components are ROHS3 compliant, meeting regulatory requirements for use in compliant applications.

Product Status: The ECE-A1CN331U is actively manufactured by Panasonic Electronic Components, providing assured long-term availability and supply chain reliability compared to the obsolete SN331M010ST.

Electrical Compatibility: The ECE-A1CN331U provides the same 330 µF capacitance and ±20% tolerance with a higher voltage rating (16 V versus 10 V), making it suitable for replacement in applications requiring the 10 V specification.

Mechanical Compatibility: The substitute maintains identical lead spacing (0.197" / 5.00mm) and identical diameter (0.394" / 10.00mm), ensuring PCB footprint compatibility. The reduced height (0.630" versus 0.787") requires verification that clearance constraints in the application are satisfied.

Lifetime Enhancement: The ECE-A1CN331U offers extended operational lifetime (2000 Hrs @ 85°C versus 1000 Hrs @ 85°C), providing improved reliability margins for the design.

Frequently Asked Questions (FAQ)

Q: Can the ECE-A1CN331U directly replace the SN331M010ST on the same PCB footprint?

A: The ECE-A1CN331U matches the critical footprint dimensions: lead spacing of 0.197" (5.00mm) and diameter of 0.394" (10.00mm). However, the reduced height (0.630" versus 0.787") must be verified against application clearance requirements. Physical space constraints above the capacitor on the PCB or enclosure must be confirmed to be adequate.

Q: Is the 16 V rating on the substitute part acceptable for a 10 V application?

A: The higher voltage rating (16 V) on the ECE-A1CN331U is fully acceptable in a 10 V application. Components are designed to operate safely at voltages below their rated maximum, and the higher rating provides enhanced design margin and reliability.

Q: What is the impact of the different ripple current specifications?

A: The main part specifies 380 mA at 120 Hz, while the substitute specifies 330 mA at 120 Hz. Application designs must confirm that circuit ripple current demands do not exceed the substitute's 330 mA specification at low frequency. The substitute additionally specifies 561 mA at 10 kHz high-frequency ripple current.

Q: Are both parts suitable for the same operating temperature range?

A: Both the SN331M010ST and ECE-A1CN331U operate across the identical temperature range of -40°C to 85°C, ensuring thermal compatibility for equivalent application environments.

Q: Why is the ESR (Equivalent Series Resistance) not specified for the substitute part?

A: The ECE-A1CN331U specification does not provide ESR data in the supplied parameters. If ESR is a critical design parameter for the application, the manufacturer datasheet must be consulted or an alternative substitute with specified ESR must be selected.