Equivalent & Substitute Parts for UVR2A331MHD

Part Overview

The UVR2A331MHD is a 330 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 2000 hours at 85°C and is designed for general-purpose applications. The part is classified as "Not For New Designs," indicating it has been superseded. Identifying equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where original components may be unavailable or where design flexibility permits alternative series selection.

Substiute Parts

UVR2A331MHD

NichiconIn Stock: 1446UVR2A331MHD Datasheet

Current PartRFQ

UFW2A331MHD

NichiconIn Stock: 1235UFW2A331MHD Datasheet

UpgradeRFQ

UKW2A331MHD

NichiconIn Stock: 1415UKW2A331MHD Datasheet

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UKL2A331MHD

NichiconIn Stock: 1425UKL2A331MHD Datasheet

SimilarRFQ

URS2A331MHD

NichiconIn Stock: 2196URS2A331MHD Datasheet

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UVK2A331MHD

NichiconIn Stock: 1042UVK2A331MHD Datasheet

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ECA-2AM331

Panasonic Electronic ComponentsIn Stock: 961ECA-2AM331 Datasheet

DirectRFQ

ESMG101ELL331MK25S

Chemi-ConIn Stock: 1635ESMG101ELL331MK25S Datasheet

DirectRFQ

ECA-2AM331B

Panasonic Electronic ComponentsIn Stock: 1175ECA-2AM331B Datasheet

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SK331M100ST

Cornell Dubilier Electronics (CDE)In Stock: 778SK331M100ST Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the UVR2A331MHD is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 100 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime: 2000 Hrs @ 85°C (exact match required)
• Operating Temperature: -40°C ~ 85°C (exact match required)
• Polarization: Polar (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Type: Radial, Can (exact match required)

Secondary Mechanical Considerations:

• Lead Spacing: 0.197" (5.00mm) — exact match for direct PCB compatibility
• Diameter: 0.492" (12.50mm) — exact match for space constraints
• Height: 0.984" (25.00mm) — exact match for clearance requirements

Parts are grouped into three categories based on their relationship to the main part:

Upgrade Parts (UFW2A331MHD, UKW2A331MHD): Identical electrical specifications with audio-grade applications. These parts meet all primary substitution criteria and share identical mechanical dimensions with the main part.

Similar Parts (UKL2A331MHD, URS2A331MHD, UVK2A331MHD, ECA-2AM331B): Meet all primary electrical criteria but differ in mechanical dimensions (lead spacing, diameter, and/or height). These require PCB layout verification before substitution.

Direct Alternatives (ECA-2AM331, ESMG101ELL331MK25S, SK331M100ST): Parts from alternative manufacturers meeting all primary electrical specifications. Mechanical dimensions vary; verification is required.

Parameter Comparison

Engineering Selection Recommendations

For Direct PCB Compatibility (No Layout Modification Required):

UFW2A331MHD and UKW2A331MHD are direct mechanical and electrical equivalents to UVR2A331MHD, sharing identical lead spacing (0.197" / 5.00mm), diameter (0.492" / 12.50mm), and height (0.984" / 25.00mm). Both are ROHS3 compliant. UFW2A331MHD and UKW2A331MHD are rated for audio applications and exhibit slightly lower ripple current specifications (750 mA @ 120 Hz, 1.125 A @ 10 kHz) compared to the main part (760 mA @ 120 Hz, 1.14 A @ 10 kHz), which remains within acceptable tolerance for general-purpose circuits.

For Active Product Status:

URS2A331MHD is the only Nichicon part with Active product status. It meets all primary electrical specifications but requires PCB layout verification due to different mechanical dimensions: lead spacing 0.295" (7.50mm), diameter 0.709" (18.00mm), and height 0.650" (16.50mm).

ECA-2AM331 and ECA-2AM331B (Panasonic) and ESMG101ELL331MK25S (Chemi-Con) are Active products meeting all electrical specifications. ECA-2AM331 and ECA-2AM331B share identical mechanical dimensions with UVK2A331MHD (lead spacing 0.197" / 5.00mm, diameter 0.492" / 12.50mm, height 1.063" / 27.00mm). ESMG101ELL331MK25S has height 1.043" (26.50mm), requiring clearance verification.

SK331M100ST (Cornell Dubilier Electronics) is Active and ROHS3 compliant with ESR specification of 320 mOhm @ 120 Hz. Mechanical dimensions differ significantly (lead spacing 0.295" / 7.50mm, diameter 0.630" / 16.00mm, height 1.063" / 27.00mm).

For Legacy System Maintenance:

UVK2A331MHD, UKL2A331MHD, and ECA-2AM331B are classified as "Not For New Designs" or are available in alternative packaging (Cut Tape). These remain suitable for repair and replacement in existing systems where the original UVR2A331MHD is unavailable.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can UFW2A331MHD or UKW2A331MHD be used as direct replacements for UVR2A331MHD without PCB modification?

A: Yes. UFW2A331MHD and UKW2A331MHD are mechanically and electrically equivalent to UVR2A331MHD. They share identical lead spacing (0.197" / 5.00mm), diameter (0.492" / 12.50mm), and height (0.984" / 25.00mm). All three parts meet the same electrical specifications: 330 µF, 100 V, ±20% tolerance, 2000 Hrs @ 85°C, and -40°C ~ 85°C operating temperature range. No PCB layout changes are required.

Q: What is the difference between UVR2A331MHD and URS2A331MHD?

A: Both parts are Nichicon 330 µF, 100 V aluminum electrolytic capacitors with identical electrical specifications. The primary differences are: (1) URS2A331MHD has Active product status, while UVR2A331MHD is "Not For New Designs"; (2) mechanical dimensions differ—URS2A331MHD has lead spacing 0.295" (7.50mm), diameter 0.709" (18.00mm), and height 0.650" (16.50mm), compared to UVR2A331MHD's 0.197" (5.00mm) lead spacing, 0.492" (12.50mm) diameter, and 0.984" (25.00mm) height. PCB layout verification is required before substitution.

Q: Can I use ECA-2AM331 or ECA-2AM331B (Panasonic) as replacements?

A: Yes, with height verification. ECA-2AM331 and ECA-2AM331B meet all electrical specifications (330 µF, 100 V, ±20%, 2000 Hrs @ 85°C). Lead spacing and diameter are identical to UVR2A331MHD (0.197" / 5.00mm and 0.492" / 12.50mm, respectively). However, height is 1.063" (27.00mm) compared to UVR2A331MHD's 0.984" (25.00mm). Verify clearance in your application before substitution. Both parts are Active and ROHS3 compliant.

Q: Why do some substitute parts have different lead spacing and diameter?

A: Lead spacing and diameter are determined by the capacitor series design. While all substitute parts maintain the same electrical specifications (330 µF, 100 V, ±20%, 2000 Hrs @ 85°C), different series may use different physical form factors. UKL2A331MHD, URS2A331MHD, and SK331M100ST have larger lead spacing (0.295" / 7.50mm) and diameter (0.630" to 0.709" / 16.00mm to 18.00mm), which affects PCB hole spacing and component placement. Verify your PCB layout before selecting these alternatives.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed—UFW2A331MHD, UKW2A331MHD, UKL2A331MHD, URS2A331MHD, UVK2A331MHD, ECA-2AM331, ESMG101ELL331MK25S, ECA-2AM331B, and SK331M100ST—are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the difference between ECA-2AM331 and ECA-2AM331B?

A: Both are Panasonic 330 µF, 100 V aluminum electrolytic capacitors with identical electrical and mechanical specifications. The primary difference is packaging: ECA-2AM331 is supplied in Bulk packaging, while ECA-2AM331B is supplied in Cut Tape (CT) packaging. Electrical performance and physical dimensions are identical.

Q: Can I use SK331M100ST (Cornell Dubilier Electronics) as a replacement?

A: Yes, with PCB layout verification. SK331M100ST meets all electrical specifications (330 µF, 100 V, ±20%, 2000 Hrs @ 85°C) and is Active with ROHS3 compliance. However, mechanical dimensions differ significantly: lead spacing is 0.295" (7.50mm), diameter is 0.630" (16.00mm), and height is 1.063" (27.00mm). Additionally, SK331M100ST specifies ESR of 320 mOhm @ 120 Hz. Verify PCB hole spacing and clearance requirements before substitution.

Q: What ripple current specifications should I consider when selecting a substitute?

A: Ripple current specifications are provided at two frequencies: 120 Hz (low frequency) and 10 kHz or higher (high frequency). UVR2A331MHD is rated for 760 mA @ 120 Hz and 1.14 A @ 10 kHz. UFW2A331MHD and UKW2A331MHD are rated for 750 mA @ 120 Hz and 1.125 A @ 10 kHz—slightly lower but within acceptable tolerance. ECA-2AM331 and ECA-2AM331B are rated for 700 mA @ 120 Hz and 1.19 A @ 10 kHz. SK331M100ST is rated for 860 mA @ 120 Hz and 1.118 A @ 1 kHz. Select a substitute with ripple current ratings equal to or exceeding your circuit requirements.

Q: Which substitute part should I choose for new designs?

A: For new designs, select from Active product status parts: URS2A331MHD (Nichicon), ECA-2AM331 or ECA-2AM331B (Panasonic), ESMG101ELL331MK25S (Chemi-Con), or SK331M100ST (Cornell Dubilier Electronics). All are ROHS3 compliant and currently in production. Verify mechanical dimensions against your PCB layout requirements before final selection.