UES1E331MHM Equivalent & Substitute Parts

Part Overview

The UES1E331MHM is a 330 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 1000 hours at 85°C and is designed for audio applications. The part carries a "Not For New Designs" status, indicating it is obsolete or superseded. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance.

Substiute Parts

UES1E331MHM

NichiconIn Stock: 1184UES1E331MHM Datasheet

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50NXA330MEFC12.5X25

RubyconIn Stock: 92450NXA330MEFC12.5X25 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the UES1E331MHM is determined by the following critical parameters:

• Capacitance: Must be 330 µF (exact match required)
• Tolerance: Must be ±20% (exact match required)
• Polarization: Must be Bi-Polar (exact match required)
• Lead Spacing: Must be 0.197" (5.00 mm) (exact match required)
• Size / Dimension: Must be 0.492" Dia (12.50 mm) (exact match required)
• Mounting Type: Must be Through Hole (exact match required)
• Package / Case: Must be Radial, Can (exact match required)

The substitute part 50NXA330MEFC12.5X25 (Rubycon NXA series) meets all critical mechanical and electrical parameters. The substitute provides a higher rated voltage (50 V vs. 25 V) and improved thermal performance (1000 Hrs @ 105°C vs. 1000 Hrs @ 85°C), making it suitable for applications requiring enhanced reliability margins.

Parameter Comparison

Engineering Selection Recommendations

The 50NXA330MEFC12.5X25 is the qualified substitute for the UES1E331MHM. Both parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements. The substitute part carries an Active product status, ensuring long-term availability and supply chain stability compared to the obsolete UES1E331MHM.

The substitute provides superior performance characteristics: a 50 V rated voltage (double the original 25 V specification) and extended thermal performance (105°C vs. 85°C operating maximum). The physical footprint remains compatible, with a maximum height difference of 0.020" (0.50 mm), which is negligible for through-hole PCB applications. Selection of the substitute part is appropriate for both legacy system maintenance and new design implementations requiring this capacitance and voltage class.

Frequently Asked Questions (FAQ)

Q: Can the 50NXA330MEFC12.5X25 be used as a direct replacement for the UES1E331MHM?

A: Yes. Both parts share identical capacitance (330 µF), tolerance (±20%), polarization (Bi-Polar), lead spacing (5.00 mm), and package type (Radial, Can). The substitute fits the same PCB footprint and mounting configuration.

Q: What is the significance of the higher 50 V rating on the substitute part?

A: The substitute's 50 V rating provides a higher voltage margin than the original 25 V specification. This does not affect compatibility; the part operates safely at the original 25 V design voltage and provides additional headroom for transient voltage conditions.

Q: Does the 0.020" height difference affect PCB compatibility?

A: No. The height difference (1.063" vs. 1.043") is 0.020" (0.50 mm) and is within typical PCB clearance tolerances for through-hole radial capacitors. No PCB redesign is required.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the UES1E331MHM and 50NXA330MEFC12.5X25 are ROHS3 compliant and REACH unaffected, meeting current electronic component regulatory requirements.

Q: Why is the original part marked "Not For New Designs"?

A: The UES1E331MHM is obsolete. The Nichicon UES series has been superseded. The Rubycon NXA series substitute is an active product with ongoing manufacturer support and guaranteed supply availability.