337CKS063M Equivalent & Substitute Parts Reference

Part Overview

The 337CKS063M is a 330 µF, 63 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the CKS series. This radial, through-hole component is rated for 2000 hours at 85°C and is designed for general-purpose applications requiring stable capacitance and low equivalent series resistance. The part is currently active in production with 772 pieces in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand enhanced thermal performance, or when supply chain optimization requires alternative sourcing from qualified manufacturers. This reference provides direct substitutes, upgraded alternatives with improved thermal ratings, and parametric equivalents that maintain functional compatibility.

Substiute Parts

337CKS063M

Cornell Dubilier / Illinois CapacitorIn Stock: 875337CKS063M Datasheet

Current PartRFQ

ECA-1JM331

Panasonic Electronic ComponentsIn Stock: 4564ECA-1JM331 Datasheet

DirectRFQ

UVR1J331MPD

NichiconIn Stock: 13482UVR1J331MPD Datasheet

DirectRFQ

63PX330MEFC10X20

RubyconIn Stock: 109263PX330MEFC10X20 Datasheet

UpgradeRFQ

ECA-1JHG331

Panasonic Electronic ComponentsIn Stock: 72622ECA-1JHG331 Datasheet

UpgradeRFQ

ESMG630ELL331MJ20S

Chemi-ConIn Stock: 3350ESMG630ELL331MJ20S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 337CKS063M is determined by the following mandatory parameters:

Core Compatibility Parameters:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 63 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can (exact match required)
• Lead Spacing: 0.197" (5.00 mm) (exact match required)
• Size / Dimension: 0.394" Dia (10.00 mm) (exact match required)

Thermal and Lifetime Considerations:

• Lifetime @ Temperature: 2000 Hrs @ 85°C (minimum requirement)
• Operating Temperature Range: -40°C ~ 85°C (minimum requirement)

Substitute parts are classified into three categories:

Direct Substitutes: Parts meeting all core compatibility parameters with identical thermal ratings (2000 Hrs @ 85°C, -40°C ~ 85°C).

Upgrade Substitutes: Parts meeting all core compatibility parameters with enhanced thermal performance (2000 Hrs @ 105°C, -55°C ~ 105°C), providing superior reliability in elevated temperature environments.

Parametric Equivalents: Parts meeting all core compatibility parameters with identical thermal ratings but potentially different electrical characteristics (ESR, ripple current) due to manufacturing differences.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Thermal Performance):

ECA-1JM331 (Panasonic) is the primary direct substitute. It maintains the 2000 Hrs @ 85°C thermal rating and -40°C ~ 85°C operating range. This part is currently active in production with substantial inventory (4502 pieces). Height difference of 0.020" (0.50 mm) is within typical PCB layout tolerances for through-hole radial capacitors.

ESMG630ELL331MJ20S (Chemi-Con) is a parametric equivalent with identical thermal specifications. However, this part is discontinued at DiGi Electronics and should be used only when existing inventory is available and long-term supply is not required.

UVR1J331MPD (Nichicon) meets all core compatibility parameters but carries a "Not For New Designs" product status. This designation indicates the manufacturer is phasing out this part. Use only for legacy system maintenance or when no other alternatives are available.

For Enhanced Thermal Performance (Upgrade Path):

ECA-1JHG331 (Panasonic NHG-A series) provides upgraded thermal performance with 2000 Hrs @ 105°C rating and extended operating range (-55°C ~ 105°C). This part is active in production with the highest inventory level (72555 pieces), ensuring long-term availability. Height difference of 0.020" (0.50 mm) requires PCB layout verification.

63PX330MEFC10X20 (Rubycon PX series) offers equivalent upgraded thermal performance (2000 Hrs @ 105°C, -55°C ~ 105°C) with identical height to the main part (0.846"). This option is suitable when PCB space constraints require exact dimensional matching.

Compliance and Regulatory Status:

All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the 337CKS063M. All parts carry EAR99 export classification and identical HTSUS tariff codes (8532.22.0020).

Frequently Asked Questions (FAQ)

Q: Can ECA-1JM331 be used as a direct replacement for 337CKS063M in existing designs?

A: Yes. ECA-1JM331 meets all core compatibility parameters: 330 µF capacitance, 63 V voltage rating, ±20% tolerance, polar configuration, through-hole mounting, radial can package, and 5.00 mm lead spacing. Thermal specifications are identical (2000 Hrs @ 85°C, -40°C ~ 85°C). The height difference of 0.020" (0.50 mm) is within standard PCB layout tolerances for radial capacitors.

Q: What is the difference between direct substitutes and upgrade substitutes?

A: Direct substitutes (ECA-1JM331, UVR1J331MPD, ESMG630ELL331MJ20S) maintain the original thermal rating of 2000 Hrs @ 85°C with operating range -40°C ~ 85°C. Upgrade substitutes (ECA-1JHG331, 63PX330MEFC10X20) provide enhanced thermal performance with 2000 Hrs @ 105°C rating and extended operating range -55°C ~ 105°C. Upgrade substitutes are suitable for applications requiring higher reliability margins or operation in elevated temperature environments.

Q: Why is UVR1J331MPD marked "Not For New Designs"?

A: This designation indicates that Nichicon is discontinuing this part number. While UVR1J331MPD meets all electrical and mechanical compatibility requirements, it should not be selected for new product designs due to uncertain long-term availability. Use this part only for maintenance of existing systems where inventory is already committed.

Q: Is ESMG630ELL331MJ20S still available?

A: ESMG630ELL331MJ20S is discontinued at DiGi Electronics, though 3251 pieces remain in current inventory. This part should be used only when existing stock is available and long-term supply is not a requirement. For new designs or long-term production, select an active part such as ECA-1JM331 or ECA-1JHG331.

Q: What is the height difference between substitute parts, and does it matter?

A: The 337CKS063M has a maximum seated height of 0.846" (21.50 mm). ECA-1JM331 and UVR1J331MPD are 0.020" (0.50 mm) taller at 0.866" (22.00 mm). ECA-1JHG331 is also 0.866" (22.00 mm). 63PX330MEFC10X20 matches the original height at 0.846" (21.50 mm). Height differences of 0.50 mm are typically accommodated in PCB layout for through-hole components, but verification is required for space-constrained applications.

Q: Should I use an upgrade substitute (105°C rated) instead of a direct substitute?

A: Upgrade substitutes provide superior reliability margins and are recommended for applications operating near maximum temperature limits or requiring extended service life. However, direct substitutes are functionally adequate for applications operating within the -40°C ~ 85°C range. Selection depends on system thermal environment and reliability requirements, not on component availability alone.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the 337CKS063M. All parts carry identical export classification (EAR99) and tariff codes (8532.22.0020).

Q: Can I mix different substitute parts in the same circuit board?

A: Yes, provided all parts meet the core compatibility parameters. All listed substitutes are electrically and mechanically compatible with the 337CKS063M. However, for production consistency and supply chain management, using a single substitute part number across a design is recommended.