UEP1A331MPD Equivalent & Substitute Parts

Part Overview

The UEP1A331MPD is a 330 µF, 10 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. The part delivers 1000 hours of operational life at 105°C and is suitable for general-purpose applications requiring through-hole mounting.

Finding equivalent substitute parts is necessary due to the product's discontinued status and potential supply constraints. Suitable alternatives must maintain the same capacitance value, tolerance, physical dimensions, and mounting configuration while meeting or exceeding the original voltage and thermal specifications.

Substiute Parts

UEP1A331MPD

NichiconIn Stock: 971UEP1A331MPD Datasheet

Current PartRFQ

25NXA330MEFC10X16

RubyconIn Stock: 117825NXA330MEFC10X16 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the UEP1A331MPD is determined by the following critical parameters:

• Capacitance Value: Must be 330 µF to maintain circuit functionality
• Tolerance: Must be ±20% to ensure specification compliance
• Physical Dimensions: Lead spacing (5.00 mm), diameter (10.00 mm), and height (17.50 mm) must match for PCB compatibility
• Mounting Type: Must be through-hole radial configuration
• Voltage Rating: Must be equal to or greater than 10 V to ensure safe operation
• Thermal Performance: Must support 1000 hours minimum lifetime at 105°C
• Operating Temperature Range: Must cover -55°C to 105°C
• Compliance: Must maintain ROHS3 compliance and REACH Unaffected status

The substitute part 25NXA330MEFC10X16 (Rubycon NXA series) meets all these criteria with an upgraded voltage rating of 25 V, providing enhanced margin for circuit protection.

Parameter Comparison

Engineering Selection Recommendations

The 25NXA330MEFC10X16 (Rubycon NXA series) is the qualified substitute for the UEP1A331MPD. Selection is based on the following engineering criteria:

• Product Status: The substitute is Active, ensuring continued availability and supply chain stability, whereas the original part is Not For New Designs
• Compliance Alignment: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements
• Electrical Equivalence: Identical capacitance (330 µF) and tolerance (±20%) ensure circuit performance parity
• Physical Compatibility: Matching lead spacing, diameter, and height enable direct PCB footprint compatibility without layout modifications
• Voltage Margin: The 25 V rating of the substitute provides enhanced operational margin over the original 10 V specification
• Thermal Performance: Both parts deliver equivalent 1000-hour lifetime at 105°C, maintaining thermal reliability

Frequently Asked Questions (FAQ)

Q: Can the 25NXA330MEFC10X16 be used as a direct replacement for the UEP1A331MPD?

A: Yes. Both parts share identical capacitance (330 µF), tolerance (±20%), physical dimensions (10.00 mm diameter, 5.00 mm lead spacing, 17.50 mm height), and thermal performance (1000 Hrs @ 105°C). The substitute's higher voltage rating (25 V vs. 10 V) is compatible with circuits designed for the original 10 V part.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (Nichicon vs. Rubycon), product status (Not For New Designs vs. Active), voltage rating (10 V vs. 25 V), and ripple current specifications at high frequency (360 mA vs. 296.4 mA @ 10 kHz). All other electrical and mechanical parameters are equivalent.

Q: Will the substitute part fit the existing PCB layout?

A: Yes. The substitute maintains identical physical dimensions and lead spacing, ensuring compatibility with existing through-hole PCB footprints without modification.

Q: Are there any compliance concerns with substitution?

A: No. Both parts are ROHS3 compliant and REACH Unaffected, maintaining full regulatory alignment.

Q: Why is the substitute rated for 25 V instead of 10 V?

A: The higher voltage rating provides additional operational margin and protection against voltage transients. This does not affect compatibility in circuits designed for 10 V operation.