Equivalent & Substitute Parts for 338CKE050M

Part Overview

The 338CKE050M is a 3300 µF, 50 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the CKE series. This radial, through-hole component is designed for bypass and decoupling applications with a rated lifetime of 2000 hours at 105°C. The part is currently active and in stock with 651 units available.

Substitute parts are identified when they share identical or compatible electrical and mechanical specifications, including capacitance, voltage rating, tolerance, package type, lead spacing, and physical dimensions. Equivalent components enable design flexibility, supply chain continuity, and component availability across multiple manufacturers.

Substiute Parts

338CKE050M

Cornell Dubilier / Illinois CapacitorIn Stock: 672338CKE050M Datasheet

Current PartRFQ

50PX3300MEFC18X35.5

RubyconIn Stock: 96550PX3300MEFC18X35.5 Datasheet

DirectRFQ

UKA1H332MHD

NichiconIn Stock: 1537UKA1H332MHD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 338CKE050M is determined by the following critical parameters:

Electrical Compatibility:

• Capacitance: 3300 µF (exact match required)
• Voltage Rating: 50 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime: 2000 Hrs @ 105°C (exact match required)
• Polarization: Polar (exact match required)

Mechanical Compatibility:

• Package Type: Radial, Can (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.295" (7.50mm) (exact match required)
• Diameter: 0.709" (18.00mm) (exact match required)
• Height: Maximum 1.457" (37.00mm) acceptable (main part: 1.437")

Regulatory & Environmental:

• RoHS3 Compliance (required)
• REACH Unaffected status (required)

Two substitute parts meet these criteria: 50PX3300MEFC18X35.5 (Rubycon) and UKA1H332MHD (Nichicon).

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: 338CKE050M (Cornell Dubilier)

The 338CKE050M remains the primary choice for new designs. It is actively manufactured, maintains full product support, and is currently in stock with 651 units available. This part is suitable for all new applications requiring 3300 µF, 50 V aluminum electrolytic capacitors in radial through-hole configuration.

First Substitute: 50PX3300MEFC18X35.5 (Rubycon)

The Rubycon 50PX3300MEFC18X35.5 is the recommended substitute for the 338CKE050M. This part is actively manufactured and maintains identical electrical and mechanical specifications. It is ROHS3 compliant and REACH unaffected. The part is in stock with 872 units available. The operating temperature range extends to -55°C, providing broader environmental coverage than the main part. Height is 0.020" (0.50mm) greater, which remains acceptable for standard through-hole PCB layouts.

Secondary Substitute: UKA1H332MHD (Nichicon)

The Nichicon UKA1H332MHD meets all electrical and mechanical substitution criteria. However, this part carries a "Not For New Designs" product status designation. It is suitable only for replacement, repair, or legacy system applications where the original part specification must be maintained. The part is in stock with 1463 units available. The operating temperature range extends to -55°C. Height is 0.020" (0.50mm) greater than the main part.

Frequently Asked Questions (FAQ)

Q: Can 50PX3300MEFC18X35.5 be used as a direct replacement for 338CKE050M?

A: Yes. Both parts share identical capacitance (3300 µF), voltage rating (50 V), tolerance (±20%), lifetime (2000 Hrs @ 105°C), lead spacing (0.295" / 7.50mm), diameter (0.709" / 18.00mm), and package type (radial through-hole). The height difference of 0.020" (0.50mm) is within acceptable PCB layout tolerances for standard through-hole applications. Both parts are ROHS3 compliant and actively manufactured.

Q: Why is UKA1H332MHD marked "Not For New Designs"?

A: The "Not For New Designs" status indicates that Nichicon has discontinued active development and marketing of this part for new applications. While the part meets all electrical and mechanical specifications and remains in stock, it is intended for legacy system support, repair, and replacement only. For new designs, use 338CKE050M or 50PX3300MEFC18X35.5.

Q: What is the maximum acceptable height difference for PCB compatibility?

A: The main part 338CKE050M has a maximum seated height of 1.437" (36.50mm). Both substitute parts have a maximum seated height of 1.457" (37.00mm), a difference of 0.020" (0.50mm). This difference is acceptable for standard through-hole PCB designs with typical component clearance specifications. Verify clearance in applications with height-constrained layouts.

Q: Are all three parts ROHS3 compliant?

A: Yes. The 338CKE050M, 50PX3300MEFC18X35.5, and UKA1H332MHD are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What is the difference in operating temperature range?

A: The 338CKE050M operates from -40°C to 105°C. Both substitute parts (50PX3300MEFC18X35.5 and UKA1H332MHD) operate from -55°C to 105°C, providing an extended lower temperature range of 15°C. For applications requiring operation below -40°C, the substitute parts offer superior performance.

Q: Can these parts be used interchangeably in bypass and decoupling applications?

A: Yes. All three parts are rated for bypass and decoupling applications (or general purpose applications in the case of substitutes) with identical electrical specifications. They are suitable for power supply filtering, signal coupling, and noise suppression circuits requiring 3300 µF capacitance at 50 V.