CTX50-2P-R Equivalent & Substitute Parts Reference

Part Overview

The CTX50-2P-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: 49.1 µH in parallel connection and 196.38 µH in series connection. The part is currently active in production with 941 pieces available in inventory.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances for parallel and series inductance values, current ratings, DC resistance, operating temperature range, and package compatibility. Alternative sources become necessary due to supply chain considerations, design phase transitions, or application-specific performance requirements.

Substiute Parts

CTX50-2P-R

Eaton - Electronics DivisionIn Stock: 956CTX50-2P-R Datasheet

Current PartRFQ

PM3602-50-RC

Bourns Inc.In Stock: 806PM3602-50-RC Datasheet

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SLF10145T-470M1R4-PF

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CTX50-2P-R is determined by the following criteria:

Primary Electrical Parameters:

• Inductance values in parallel and series configurations must fall within ±20% tolerance of the main part specifications
• Current ratings must support the application requirements in both parallel and series configurations
• DC resistance values must not exceed the maximum specifications to ensure thermal performance compatibility

Secondary Compatibility Parameters:

• Operating temperature range must encompass or exceed the application's thermal requirements
• Mounting type must be surface mount to ensure PCB assembly compatibility
• RoHS3 compliance is required for regulatory alignment
• Moisture sensitivity level must be acceptable for storage and handling conditions

Package Considerations:

• Physical dimensions and height must be compatible with PCB layout constraints
• Nonstandard package classification applies to all identified substitutes

The identified substitute parts meet these criteria within the specified tolerance bands and operational parameters.

Parameter Comparison

Engineering Selection Recommendations

PM3602-50-RC (Bourns Inc.):

This 2-coil inductor array provides the closest electrical equivalence to the CTX50-2P-R. Parallel inductance of 50 µH and series inductance of 200 µH fall within the ±20% tolerance specification. Current ratings of 780 mA (parallel) and 380 mA (series) are slightly lower than the main part but remain within acceptable operational margins for most applications. DC resistance values are superior, with 220 mOhm maximum in parallel configuration compared to 305 mOhm. The extended operating temperature range of -55 to 125°C provides additional thermal margin. Both parts maintain unshielded construction and identical moisture sensitivity classification. ROHS3 compliance is confirmed. This substitute is suitable for direct replacement in applications where the specified current and inductance tolerances are acceptable.

SLF10145T-470M1R4-PF (TDK Corporation):

This single-coil inductor differs fundamentally in architecture from the CTX50-2P-R, which is a 2-coil array. The SLF10145T-470M1R4-PF provides 47 µH inductance with 1.5 A current rating and shielded construction. This part is classified as "Not For New Designs" and represents a legacy product line. While the inductance value approximates the parallel configuration of the main part within tolerance, the absence of series configuration capability and the single-coil design limit its direct substitution applicability. The shielded construction differs from the unshielded specification of the CTX50-2P-R. This part is suitable only for applications requiring single-coil operation at 47 µH with higher current capacity and electromagnetic shielding requirements.

Frequently Asked Questions (FAQ)

Q: Can PM3602-50-RC replace CTX50-2P-R in all applications?

A: PM3602-50-RC is electrically compatible within the ±20% tolerance specification for both parallel (50 µH vs. 49.1 µH) and series (200 µH vs. 196.38 µH) configurations. Current ratings are slightly lower (780 mA parallel, 380 mA series) compared to the main part (820 mA, 410 mA). Verify that your application does not require the maximum current specifications of the CTX50-2P-R. Both parts are unshielded, surface mount, ROHS3 compliant, and MSL 1 rated. Physical dimensions differ slightly (PM3602-50-RC: 11.48mm x 8.99mm vs. CTX50-2P-R: 11.43mm x 11.43mm), requiring PCB layout verification.

Q: Why is SLF10145T-470M1R4-PF listed as a substitute if it is a single-coil inductor?

A: The SLF10145T-470M1R4-PF is included because it provides inductance value (47 µH) within tolerance of the CTX50-2P-R parallel configuration. However, this part is fundamentally different: it is a single-coil design without series configuration capability, features shielded construction, and carries "Not For New Designs" status. This part is suitable only for applications requiring single-coil operation at approximately 47 µH with shielding benefits. It is not a direct replacement for dual-configuration applications.

Q: What are the key differences in DC resistance between the main part and substitutes?

A: CTX50-2P-R parallel DCR is 305 mOhm maximum. PM3602-50-RC offers superior performance at 220 mOhm maximum, reducing resistive losses by approximately 28%. SLF10145T-470M1R4-PF provides 120 mOhm maximum, further reducing losses but applicable only to single-coil applications. Lower DCR values reduce heat generation and improve efficiency in current-carrying applications.

Q: Are there temperature range considerations for substitution?

A: CTX50-2P-R operates from -40°C to 85°C. PM3602-50-RC extends this range to -55°C to 125°C, providing additional thermal margin for extreme environment applications. SLF10145T-470M1R4-PF operates from -40°C to 105°C. If your application requires operation below -40°C or above 85°C, PM3602-50-RC is the appropriate choice.

Q: What is the significance of the ±20% tolerance specification?

A: The ±20% tolerance means actual inductance values may vary from nominal by up to 20% in either direction. For CTX50-2P-R at 49.1 µH parallel, acceptable range is 39.28 µH to 58.92 µH. PM3602-50-RC at 50 µH parallel has acceptable range of 40 µH to 60 µH. Both parts overlap significantly within this tolerance band, confirming electrical compatibility for applications designed to accommodate ±20% inductance variation.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Physical dimensions must be verified before PCB layout finalization. CTX50-2P-R dimensions are 11.43mm x 11.43mm x 5.97mm height. PM3602-50-RC dimensions are 11.48mm x 8.99mm x 5.72mm height. The width difference (11.43mm vs. 8.99mm) may affect PCB footprint compatibility. SLF10145T-470M1R4-PF dimensions are 10.10mm x 10.10mm x 4.80mm height, requiring different PCB landing pattern. Consult PCB design files and component datasheets before substitution.

Q: What is the inventory status of substitute parts?

A: CTX50-2P-R has 941 pieces in stock. PM3602-50-RC has 794 pieces available. SLF10145T-470M1R4-PF has 24,662 pieces in inventory. Availability should be verified with your component supplier for current stock levels and lead times.