Equivalent & Substitute Parts for 405QPC250KA3A1LL

Part Overview

The 405QPC250KA3A1LL is a 4 µF film capacitor rated for 250V AC operation, manufactured by Cornell Dubilier / Illinois Capacitor. This chassis mount component features polyester metallized dielectric construction in a rectangular box configuration with screwless push-in spring termination. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing maintenance and repair applications in motor run circuits.

Substiute Parts

405QPC250KA3A1LL

Cornell Dubilier / Illinois CapacitorIn Stock: 970405QPC250KA3A1LL Datasheet

Current PartRFQ

EEC2E405HQA401

NichiconIn Stock: 1328EEC2E405HQA401 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 405QPC250KA3A1LL is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance value: 4 µF (exact match required)
• Voltage rating: 250V AC minimum (equal or higher acceptable)
• Tolerance: ±10% or tighter (substitute tolerance of -5%, +10% is acceptable)

Mechanical & Mounting Compatibility:

• Mounting type: Chassis mount configuration
• Package form: Rectangular box
• Termination: Quick connect or push-in spring acceptable for motor run applications
• Physical dimensions: Substitute dimensions must accommodate existing mounting footprint

Environmental & Compliance:

• Operating temperature: Substitute range must encompass or exceed -25°C ~ 70°C
• RoHS3 compliance required
• REACH unaffected status required

The substitute part EEC2E405HQA401 meets these criteria through equivalent capacitance, voltage rating, chassis mount configuration, and compliance certifications, with polypropylene dielectric as an acceptable alternative to polyester in motor run service.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: EEC2E405HQA401 (Nichicon)

The EEC2E405HQA401 qualifies as a direct functional substitute based on:

• Identical capacitance (4 µF) and voltage rating (250V AC)
• Tighter tolerance specification (-5%, +10% vs. ±10%)
• Extended operating temperature range (-25°C ~ 85°C vs. -25°C ~ 70°C)
• Equivalent chassis mount rectangular box configuration
• Full ROHS3 compliance and REACH unaffected status
• Polypropylene metallized dielectric acceptable for motor run applications

Mechanical Considerations:

The substitute features different termination (quick connect/disconnect vs. screwless push-in spring) and reduced footprint dimensions (37.00mm x 11.50mm vs. 46.00mm x 13.00mm). Physical mounting verification is required to confirm accommodation within existing circuit board or chassis layout. The substitute's slightly greater height (26.00mm vs. 24.50mm) must be evaluated against available clearance.

Compliance Status:

Both components maintain ROHS3 compliance and REACH unaffected status, supporting continued use in regulated applications without additional environmental documentation.

Frequently Asked Questions (FAQ)

Q: Can EEC2E405HQA401 directly replace 405QPC250KA3A1LL in motor run applications?

A: Electrical substitution is valid. Both components provide 4 µF capacitance at 250V AC with metallized film dielectric suitable for motor run service. Physical mounting compatibility must be verified due to different termination styles and reduced footprint dimensions of the substitute.

Q: What is the significance of the different dielectric materials (polyester vs. polypropylene)?

A: Both polyester and polypropylene metallized films are established dielectric materials for motor run capacitors. Polypropylene offers extended temperature capability (85°C vs. 70°C) and is widely used in equivalent motor run applications. Material substitution does not affect functional performance in this application class.

Q: Does the substitute's tighter tolerance (-5%, +10%) provide any advantage?

A: Tighter tolerance reduces capacitance variation across the specified range, potentially improving circuit performance consistency. The substitute's tolerance is within acceptable bounds for motor run applications where ±10% tolerance is standard.

Q: Are the dimensional differences critical for substitution?

A: The substitute is physically smaller in length and width (37.00mm x 11.50mm vs. 46.00mm x 13.00mm) but slightly taller (26.00mm vs. 24.50mm). Space availability in the target application must be confirmed. The reduced footprint may provide installation advantages in space-constrained designs.

Q: What is the impact of different termination types?

A: The main part uses screwless push-in spring termination; the substitute uses quick connect/disconnect termination. Both are standard chassis mount connection methods. Terminal compatibility with existing circuit board or chassis receptacles must be verified before installation.

Q: Are both components suitable for continued procurement?

A: Both components are classified as obsolete. Inventory availability should be confirmed with suppliers before design decisions. The substitute (EEC2E405HQA401) shows higher current stock levels (1223 pcs vs. 954 pcs), potentially offering better long-term availability.