CTX08-14729 Equivalent & Substitute Parts Reference

Part Overview

The CTX08-14729 is a 35 µH fixed inductor manufactured by Eaton - Electronics Division, designed for surface mount applications with a saturation current rating of 8.3 A. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support, production continuity, and component procurement.

The obsolete status of the CTX08-14729 necessitates the evaluation of substitute inductors that maintain electrical performance specifications while accommodating potential changes in package type, mounting configuration, and supplier availability.

Substiute Parts

CTX08-14729

Eaton - Electronics DivisionIn Stock: 877CTX08-14729 Datasheet

Current PartRFQ

ATCA-07-350M-V

Abracon LLCIn Stock: 945ATCA-07-350M-V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CTX08-14729 is determined by the following critical parameters:

Primary Electrical Criteria:

• Inductance value: 35 µH (exact match required)
• Current handling capability: minimum 8.3 A saturation current or equivalent current rating
• DC resistance: must support the intended circuit current without excessive power dissipation

Secondary Compatibility Criteria:

• Moisture Sensitivity Level: MSL 1 or better (lower MSL values are acceptable)
• Export control classification: EAR99 or equivalent unrestricted classification
• RoHS and REACH compliance status for regulatory alignment

Mechanical and Integration Considerations:

• Mounting type change from SMD to through-hole is permissible if circuit board layout accommodates the physical footprint
• Package configuration must be compatible with available board space and assembly processes

The substitute part ATCA-07-350M-V meets the core electrical requirements of 35 µH inductance and exceeds the saturation current specification at 10 A, while maintaining MSL 1 classification and EAR99 export status. The transition from SMD to through-hole toroidal configuration represents a mechanical change that requires board-level design verification.

Parameter Comparison

Engineering Selection Recommendations

Electrical Compatibility: The ATCA-07-350M-V provides electrical equivalence to the CTX08-14729 through matching inductance value (35 µH) and exceeding the saturation current requirement (10 A versus 8.3 A). The specified DC resistance of 10 mOhm maximum ensures acceptable power dissipation characteristics for the intended application current levels.

Regulatory and Compliance Alignment: Both components maintain MSL 1 classification, indicating unlimited moisture sensitivity protection suitable for standard manufacturing and storage environments. Both components carry EAR99 export classification, ensuring no additional export control restrictions. The ATCA-07-350M-V provides documented RoHS3 compliance and REACH unaffected status, supporting modern regulatory requirements.

Lifecycle and Availability: The CTX08-14729 is classified as obsolete, creating supply chain risk. The ATCA-07-350M-V is classified as active, ensuring continued availability and long-term procurement viability. Current inventory levels (840 pieces) support immediate component acquisition.

Design Integration Considerations: The primary design change involves transition from surface mount to through-hole mounting. This requires verification that the printed circuit board layout accommodates the toroidal package dimensions (36.00 mm length × 19.50 mm width) and radial lead configuration. The unshielded toroidal design may introduce different electromagnetic coupling characteristics compared to the original SMD component, requiring circuit-level validation in noise-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the ATCA-07-350M-V directly replace the CTX08-14729 without board redesign?

A: Direct replacement requires board-level modifications. The CTX08-14729 is a surface mount device, while the ATCA-07-350M-V is a through-hole toroidal inductor. PCB layout changes are necessary to accommodate the different mounting configuration and physical footprint (36.00 mm × 19.50 mm). Electrical performance is compatible; mechanical integration requires design verification.

Q: What is the significance of the ±20% tolerance specification on the ATCA-07-350M-V?

A: The ±20% inductance tolerance indicates the acceptable variation range around the nominal 35 µH value (28 µH to 42 µH). This tolerance must be evaluated against circuit design requirements. If the application requires tighter inductance control, additional component selection or circuit compensation may be necessary.

Q: Does the unshielded toroidal configuration of the ATCA-07-350M-V affect electromagnetic compatibility?

A: Unshielded inductors exhibit different electromagnetic field distribution compared to shielded designs. In applications with sensitive analog circuits or high-frequency signals, the unshielded configuration may introduce coupling effects. Circuit-level testing is recommended to verify electromagnetic compatibility in the target application environment.

Q: Are there any temperature operating range considerations for the ATCA-07-350M-V?

A: The ATCA-07-350M-V operates across -40°C to 105°C. This range is suitable for standard industrial and commercial applications. If the original application required operation outside this range, alternative components must be evaluated.

Q: What is the practical difference between saturation current (Isat) and current rating?

A: The CTX08-14729 specifies 8.3 A saturation current, representing the current level at which inductor core saturation begins, causing inductance degradation. The ATCA-07-350M-V specifies 10 A as the current rating, representing the maximum continuous current capacity. The ATCA-07-350M-V exceeds the original saturation specification, providing design margin.

Q: Is the 10 mOhm DC resistance of the ATCA-07-350M-V acceptable for the application?

A: DC resistance evaluation depends on circuit current levels and power dissipation budget. At 8.3 A, the ATCA-07-350M-V dissipates approximately 0.69 watts (I²R = 8.3² × 0.010). This value must be compared against thermal design requirements and component cooling provisions in the target application.