Equivalent & Substitute Parts for 405QPC400KB8A5L

Part Overview

The 405QPC400KB8A5L is a 4 µF film capacitor rated for 400V AC operation, manufactured by Cornell Dubilier / Illinois Capacitor. This chassis-mounted component features polyester metallized dielectric construction with a rectangular box package and 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

405QPC400KB8A5L

Cornell Dubilier / Illinois CapacitorIn Stock: 1175405QPC400KB8A5L Datasheet

Current PartRFQ

EEC2G405HQA405

NichiconIn Stock: 1184EEC2G405HQA405 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 405QPC400KB8A5L is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance value: 4 µF (exact match required)
• Voltage rating: 400V AC minimum (equal or higher acceptable)
• Dielectric material: Film-based (polyester or polypropylene acceptable for motor run applications)

Mechanical Compatibility Requirements:

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

Regulatory & Environmental Requirements:

• RoHS3 compliance mandatory
• Operating temperature range: Minimum -25°C to 70°C
• REACH unaffected status

The substitute part EEC2G405HQA405 satisfies all electrical and regulatory requirements while offering improved operating temperature range (-25°C to 85°C) and alternative termination technology (quick connect/disconnect).

Parameter Comparison

Engineering Selection Recommendations

The EEC2G405HQA405 qualifies as a functional equivalent for the 405QPC400KB8A5L based on the following engineering criteria:

Electrical Compatibility: Both components maintain identical 4 µF capacitance and 400V AC voltage rating specifications. The tolerance specifications (-5%, +10% for the substitute versus ±10% for the main part) remain within acceptable motor run circuit parameters. Polypropylene dielectric material in the substitute provides equivalent performance characteristics to polyester in motor run applications.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements for component selection.

Operational Advantages: The substitute part offers an extended operating temperature range (85°C maximum versus 70°C), providing additional thermal margin in applications subject to elevated ambient conditions.

Physical Integration Considerations: The substitute part exhibits different dimensional characteristics (smaller length, greater width and height). Physical mounting space availability must be confirmed prior to implementation. Termination interface differs (quick connect/disconnect versus push-in spring), requiring assessment of connection compatibility with existing circuit board or chassis mounting infrastructure.

Frequently Asked Questions (FAQ)

Q: Can the EEC2G405HQA405 directly replace the 405QPC400KB8A5L without circuit modification?

A: Electrical substitution is valid. The 4 µF capacitance and 400V AC rating are identical. However, physical mounting and termination interface differences require mechanical assessment. The quick connect/disconnect termination differs from the push-in spring design, necessitating evaluation of connection compatibility with existing mounting hardware.

Q: What is the significance of the dielectric material difference (polyester versus polypropylene)?

A: Both polyester and polypropylene metallized film dielectrics are acceptable for motor run capacitor applications. Polypropylene offers slightly superior electrical characteristics and extended temperature capability. No circuit performance degradation results from this substitution in motor run service.

Q: Are the dimensional differences critical for this substitution?

A: Physical dimensions differ significantly. The substitute is shorter (37.00mm versus 46.00mm length) but taller (34.00mm versus 24.50mm height) and wider (19.50mm versus 13.00mm width). Available mounting space must accommodate these dimensional changes. Verify clearance in the target application before implementation.

Q: Does the tolerance specification difference affect circuit performance?

A: The substitute tolerance range (-5%, +10%) is tighter on the lower bound than the main part (±10%). For motor run applications, both tolerance specifications remain within acceptable operating parameters. No functional circuit impact results from this tolerance difference.

Q: What is the significance of the extended temperature range in the substitute part?

A: The substitute operates to 85°C versus 70°C for the main part. This provides additional thermal margin in applications subject to elevated ambient temperatures or internal heat generation. The extended range does not introduce compatibility issues in standard temperature environments.

Q: Are both parts suitable for the same motor run applications?

A: Both components are specified for motor run applications with identical electrical ratings. Mechanical mounting compatibility must be confirmed based on available space and termination interface requirements in the specific application.