CTX8-2A-R Equivalent & Substitute Parts

Part Overview

The CTX8-2A-R is an unshielded 2-coil inductor array manufactured by Eaton - Electronics Division, part of the OCTA-PAC® PLUS series. This component provides dual inductance configurations: 31.6 µH in series connection and 7.9 µH in parallel connection, with a maximum DC resistance of 32 mOhm in parallel configuration. The part is classified as obsolete, making identification of equivalent substitutes necessary for ongoing design support and procurement continuity.

Substiute Parts

CTX8-2A-R

Eaton - Electronics DivisionIn Stock: 784CTX8-2A-R Datasheet

Current PartRFQ

P0398NL

Pulse ElectronicsIn Stock: 1532P0398NL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CTX8-2A-R is determined by the following critical parameters:

Inductance Values: The substitute must provide 7.9 µH in parallel configuration and 31.5–31.6 µH in series configuration, with tolerance variations not exceeding ±25% from the original specification.

Coil Configuration: The substitute must be a 2-coil inductor array with identical series and parallel connection capability.

Current Handling: The substitute must support a minimum current rating of 3.5 A in parallel configuration and 1.75 A in series configuration to maintain electrical performance under design load conditions.

DC Resistance: The substitute's DCR must not exceed 32 mOhm in parallel configuration, as higher resistance values introduce unacceptable power loss and thermal effects.

Mounting and Environmental: The substitute must be surface-mount compatible, unshielded, and rated for the operating temperature range of -40°C to 85°C or higher.

Packaging: Physical dimensions and height must accommodate the original PCB layout constraints.

The P0398NL from Pulse Electronics meets these substitution criteria across all critical parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: P0398NL (Pulse Electronics)

The P0398NL is the qualified substitute for the obsolete CTX8-2A-R. This substitution is supported by:

Electrical Equivalence: Inductance values match within 0.3% for series configuration and exactly for parallel configuration. Current ratings and DC resistance specifications of the P0398NL exceed the original part requirements, providing improved electrical performance and reduced power dissipation.

Product Status: The P0398NL is actively manufactured and available in production quantities (1497 pcs in stock), ensuring long-term procurement reliability compared to the obsolete CTX8-2A-R.

Compliance and Certification: The P0398NL carries ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. Both parts share identical MSL 1 moisture sensitivity ratings.

Environmental Performance: The P0398NL's extended operating temperature range (-40°C to 130°C) provides additional thermal margin beyond the original specification (-40°C to 85°C).

Physical Compatibility Consideration: The P0398NL has larger physical dimensions (18.16mm L x 14.99mm W x 7.87mm H) compared to the CTX8-2A-R (11.43mm L x 11.43mm W x 5.97mm H). PCB layout verification is required to confirm fit within the original mounting footprint.

Frequently Asked Questions (FAQ)

Q: Can the P0398NL be used as a direct replacement for the CTX8-2A-R without circuit modification?

A: The P0398NL is electrically equivalent in inductance and current handling. However, physical dimensions differ significantly. PCB layout must be verified to confirm the larger package (18.16mm x 14.99mm) fits the available space. No circuit modifications are required if physical fit is confirmed.

Q: What is the significance of the lower DC resistance in the P0398NL?

A: The P0398NL exhibits 53% lower DC resistance in parallel configuration (14.94 mOhm vs. 32 mOhm) and 54% lower in series configuration (59.7 mOhm vs. 129 mOhm). This reduces resistive losses, heat generation, and improves overall circuit efficiency. This is a performance advantage, not a compatibility concern.

Q: Why is the CTX8-2A-R classified as obsolete?

A: The CTX8-2A-R is no longer manufactured by Eaton. The P0398NL from Pulse Electronics provides equivalent functionality with active production status and modern compliance certifications, making it the recommended long-term solution.

Q: Are there any compliance differences between the two parts?

A: The P0398NL carries ROHS3 compliance and REACH unaffected certification. The CTX8-2A-R compliance status is not specified in available documentation. Both parts share MSL 1 moisture sensitivity and identical ECCN/HTSUS classifications.

Q: What packaging format is the P0398NL supplied in?

A: The P0398NL is supplied in tube packaging, whereas the CTX8-2A-R packaging format is listed as nonstandard. Verify tube packaging compatibility with your assembly process requirements.

Q: Does the extended temperature range of the P0398NL affect substitution suitability?

A: The P0398NL's extended operating range (-40°C to 130°C) is a superset of the original specification (-40°C to 85°C). This provides additional thermal margin and does not create compatibility issues. The part remains suitable for all applications within the original temperature range.

Q: What tolerance difference exists between the two parts?

A: The CTX8-2A-R specifies ±25% tolerance, while the P0398NL specifies ±20% tolerance. The tighter tolerance of the P0398NL provides improved inductance consistency and may enhance circuit performance in applications sensitive to inductance variation.