CTX50-1P-R Equivalent & Substitute Parts

Part Overview

The CTX50-1P-R is an unshielded 2-coil inductor array manufactured by Eaton - Electronics Division, part of the Econo-Pac™ series. This surface mount component provides dual inductance configurations: 202.07 µH in series connection and 50.52 µH in parallel connection. The part is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances. The primary substitute identified is the SLF10145T-470M1R4-PF from TDK Corporation, though this part carries a Not For New Designs status and represents a different inductor architecture (drum core, wirewound versus array configuration).

Substiute Parts

CTX50-1P-R

Eaton - Electronics DivisionIn Stock: 889CTX50-1P-R Datasheet

Current PartRFQ

SLF10145T-470M1R4-PF

TDK CorporationIn Stock: 24747SLF10145T-470M1R4-PF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the CTX50-1P-R is constrained by its unique dual-coil array architecture and specific inductance values in both series and parallel configurations. The identified substitute, SLF10145T-470M1R4-PF, operates under the following substitution criteria:

Electrical Parameters for Substitution:

• Inductance value within ±20% tolerance band
• Current rating sufficient for application requirements
• DC resistance (DCR) within acceptable limits for thermal and efficiency performance
• Operating temperature range compatibility

Mechanical Parameters for Substitution:

• Surface mount technology compatibility
• Nonstandard package footprint accommodation
• Physical dimensions permitting board layout integration

Compliance Parameters:

• RoHS3 compliance maintained
• MSL 1 rating (unlimited moisture sensitivity)
• REACH unaffected status

The SLF10145T-470M1R4-PF presents a 47 µH single inductor (drum core, wirewound) with 1.5 A current rating and 120 mOhm DCR. This substitute differs fundamentally in architecture (single coil versus dual-coil array) and inductance configuration capability. Substitution is valid only when application requirements can be met by a single 47 µH inductor without requiring the dual-configuration flexibility of the CTX50-1P-R.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Selection: The CTX50-1P-R maintains Active product status and is the preferred choice for new design implementations. This part provides dual-configuration flexibility (series and parallel inductance values) within a single component, reducing board complexity and component count.

For Substitute Consideration: The SLF10145T-470M1R4-PF carries Not For New Designs status and should be considered only for legacy system maintenance, repair, or retrofit applications where the CTX50-1P-R is unavailable. This substitute is suitable only when application requirements are limited to a single 47 µH inductance value without requiring series/parallel configuration switching.

Compliance Verification: Both parts maintain ROHS3 compliance and unlimited MSL rating (1), ensuring compatibility with standard surface mount assembly processes and storage conditions. No additional compliance documentation is required for either part.

Temperature Consideration: The SLF10145T-470M1R4-PF provides extended operating temperature range (-40°C ~ 105°C) compared to the CTX50-1P-R (-40°C ~ 85°C). Selection should account for application thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the SLF10145T-470M1R4-PF directly replace the CTX50-1P-R in all applications?

A: No. The SLF10145T-470M1R4-PF is a single-coil inductor with fixed 47 µH inductance, while the CTX50-1P-R is a dual-coil array offering both 50.52 µH (parallel) and 202.07 µH (series) configurations. Substitution is valid only when the application requires a single inductance value of approximately 47 µH and does not utilize the series configuration capability.

Q: What is the inductance tolerance relationship between these parts?

A: Both parts specify ±20% tolerance. The 47 µH value of the SLF10145T-470M1R4-PF falls within the ±20% tolerance band of the CTX50-1P-R's 50.52 µH parallel configuration (tolerance range: 40.42 µH to 60.62 µH).

Q: Are there package footprint compatibility concerns?

A: Both parts are classified as nonstandard packages. The CTX50-1P-R measures 0.450" × 0.450" × 0.165" height, while the SLF10145T-470M1R4-PF measures 0.398" × 0.398" × 0.189" height. Physical dimensions differ; board layout verification is required before substitution.

Q: Does the shielding difference affect substitution suitability?

A: The CTX50-1P-R is unshielded while the SLF10145T-470M1R4-PF is shielded. Shielding affects electromagnetic interference (EMI) characteristics. Applications sensitive to EMI performance or crosstalk may experience different behavior with the shielded substitute.

Q: What is the significance of the "Not For New Designs" status on the TDK part?

A: This status indicates the SLF10145T-470M1R4-PF is in mature/legacy phase and may have limited future availability or support. For new product development, the CTX50-1P-R (Active status) is the recommended selection to ensure long-term supply chain stability.

Q: Can current ratings be directly compared between these parts?

A: The CTX50-1P-R specifies 700 mA (parallel) and 350 mA (series) ratings. The SLF10145T-470M1R4-PF specifies 1.5 A with saturation current (Isat) of 1.4 A. The TDK part provides higher current capacity; however, application current requirements must be verified against the specific configuration being used.

Q: Are there packaging format differences?

A: Yes. The CTX50-1P-R is supplied in Tape & Reel (TR) format, while the SLF10145T-470M1R4-PF is supplied in Cut Tape (CT) & Digi-Reel® format. Procurement and assembly processes may differ accordingly.