UHE2A331MHD6 Equivalent & Substitute Parts

Part Overview

The UHE2A331MHD6 is a 330 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 10,000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is classified as "Not For New Designs," making identification of equivalent alternatives essential for ongoing production support and design updates.

Substiute Parts

UHE2A331MHD6

NichiconIn Stock: 4310UHE2A331MHD6 Datasheet

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UHE2A331MHD

NichiconIn Stock: 2521UHE2A331MHD Datasheet

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EKZE101ELL331MK35S

Chemi-ConIn Stock: 777EKZE101ELL331MK35S Datasheet

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EKZE101ELL331MM20S

Chemi-ConIn Stock: 17917EKZE101ELL331MM20S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UHE2A331MHD6 is determined by the following critical parameters:

• Electrical Match: Capacitance (330 µF), voltage rating (100 V), and tolerance (±20%) must be identical
• Thermal Performance: Lifetime rating and operating temperature range must meet or exceed the original specification
• Physical Compatibility: Lead spacing, case dimensions, and mounting type must accommodate existing PCB layouts
• Regulatory Compliance: RoHS3 compliance is required; REACH status is noted for supply chain considerations

Based on these criteria, three substitute parts are identified:

Group 1 - Nichicon UHE Series (Same Manufacturer)

• UHE2A331MHD: Identical electrical and thermal specifications with different physical dimensions (smaller diameter, taller height)

Group 2 - Chemi-Con KZE Series (Active Production)

• EKZE101ELL331MM20S: Matches lead spacing and physical footprint; reduced lifetime (5,000 hrs @ 105°C)
• EKZE101ELL331MK35S: Compact form factor with reduced lifetime (5,000 hrs @ 105°C)

Parameter Comparison

Engineering Selection Recommendations

For Direct PCB Replacement (No Layout Modification) EKZE101ELL331MM20S is the preferred substitute. It maintains identical lead spacing (0.295" / 7.50mm) and similar physical dimensions to the UHE2A331MHD6, ensuring compatibility with existing through-hole PCB layouts. This part is in active production status and carries ROHS3 compliance. The reduced lifetime rating (5,000 hrs @ 105°C versus 10,000 hrs) must be evaluated against application duty cycle requirements.

For Nichicon-Only Supply Chain Requirements UHE2A331MHD provides equivalent electrical and thermal performance but requires PCB layout modification due to different lead spacing (0.197" / 5.00mm) and physical dimensions. This part remains in the same UHE series and maintains 10,000-hour lifetime rating.

For Space-Constrained Applications EKZE101ELL331MK35S offers a compact form factor with reduced physical footprint. Lead spacing (0.197" / 5.00mm) and dimensions differ from the original, requiring PCB redesign. Active production status and ROHS3 compliance are confirmed.

All substitute parts maintain the required 100 V rating, 330 µF capacitance, ±20% tolerance, and -40°C to 105°C operating temperature range. Selection should prioritize PCB layout compatibility and thermal performance requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can EKZE101ELL331MM20S be used as a direct drop-in replacement for UHE2A331MHD6? A: Yes, for PCB layout purposes. Both parts share identical lead spacing (0.295" / 7.50mm) and similar physical dimensions. However, the EKZE101ELL331MM20S has a reduced lifetime rating of 5,000 hours at 105°C compared to 10,000 hours for the UHE2A331MHD6. Verify that your application's thermal duty cycle is compatible with this reduced rating.

Q: What is the impact of the reduced lifetime rating on the Chemi-Con KZE series parts? A: The KZE series (EKZE101ELL331MM20S and EKZE101ELL331MK35S) are rated for 5,000 hours at 105°C versus 10,000 hours for the Nichicon UHE series. This affects long-term reliability in high-temperature environments. Applications requiring extended operational life at elevated temperatures should prioritize the UHE2A331MHD for equivalent thermal performance.

Q: Do all substitute parts meet RoHS3 compliance? A: Yes. All listed substitutes—UHE2A331MHD, EKZE101ELL331MM20S, and EKZE101ELL331MK35S—are ROHS3 compliant and suitable for regulated supply chains.

Q: Which substitute requires PCB layout modification? A: UHE2A331MHD and EKZE101ELL331MK35S both require layout changes due to different lead spacing (0.197" / 5.00mm) and physical dimensions. EKZE101ELL331MM20S maintains the original lead spacing and can be used without PCB modification.

Q: What is the difference between EKZE101ELL331MM20S and EKZE101ELL331MK35S? A: Both are Chemi-Con KZE series parts with identical electrical specifications. The primary differences are physical dimensions and height: EKZE101ELL331MM20S has a height of 0.846" (21.50mm), while EKZE101ELL331MK35S is taller at 1.437" (36.50mm). Lead spacing also differs: 0.295" (7.50mm) for MM20S and 0.197" (5.00mm) for MK35S.

Q: Is the UHE2A331MHD a suitable alternative if I need to maintain Nichicon sourcing? A: Yes, UHE2A331MHD is a Nichicon part with identical electrical and thermal specifications (10,000 hrs @ 105°C). However, it has different physical dimensions and lead spacing (0.197" / 5.00mm), requiring PCB layout verification and potential redesign.