CTX32CT-100-R Equivalent & Substitute Parts Reference

Part Overview

The CTX32CT-100-R is a 10 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, designed for surface mount applications in the 1210 (3225 Metric) package format. This component is rated for 300 mA continuous current with a maximum DC resistance of 500 mOhm and operates across the temperature range of -25°C to 85°C.

The CTX32CT-100-R has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Substiute Parts

CTX32CT-100-R

Eaton - Electronics DivisionIn Stock: 836CTX32CT-100-R Datasheet

Current PartRFQ

CM322522-100JL

Bourns Inc.In Stock: 11998CM322522-100JL Datasheet

SimilarRFQ

CM322522-100KL

Bourns Inc.In Stock: 2227CM322522-100KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CTX32CT-100-R must satisfy the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

• Inductance value: 10 µH
• Package format: 1210 (3225 Metric) surface mount
• Physical dimensions: 0.126" L x 0.098" W (3.20mm x 2.50mm), Height 0.087" (2.20mm) maximum
• Mounting type: Surface Mount
• Core type: Drum Core, Wirewound
• Shielding configuration: Unshielded

Allowable Parameter Variations:

• Current rating: Substitute must support minimum 300 mA; higher ratings are acceptable
• DC resistance: Substitute must not exceed 500 mOhm maximum; lower values are acceptable
• Inductance tolerance: ±10% or tighter tolerance acceptable
• Operating temperature range: Substitute range must encompass or exceed -25°C to 85°C
• Self-resonant frequency: Substitute must meet or exceed 30 MHz
• Q factor: Higher Q values indicate improved performance

The Bourns CM322522 series parts (CM322522-100JL and CM322522-100KL) are identified as substitutes based on matching inductance, package dimensions, and core configuration. However, these substitutes operate at reduced current ratings (140 mA versus 300 mA) and exhibit higher DC resistance (2.1 Ohm versus 500 mOhm maximum).

Parameter Comparison

Engineering Selection Recommendations

Substitute Viability Assessment:

The CM322522-100JL and CM322522-100KL parts share identical electrical specifications and differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel). Both substitutes maintain the required 10 µH inductance value and physical footprint compatibility with the original CTX32CT-100-R design.

Critical Limitations:

The substitute parts operate at 140 mA maximum current rating, which is 53% lower than the original 300 mA specification. Applications requiring the full 300 mA current capacity cannot use these substitutes without circuit redesign or parallel configuration of multiple components.

The DC resistance of the substitutes (2.1 Ohm maximum) is significantly higher than the original specification (500 mOhm maximum), resulting in increased power dissipation and heat generation at equivalent current levels.

Compliance and Availability:

Both CM322522 variants are active products with ROHS3 compliance certification, ensuring regulatory alignment with current environmental standards. The Bourns CM322522 series demonstrates superior self-resonant frequency (36 MHz versus 30 MHz) and higher Q factor (30 versus 15 at 2.52 MHz), indicating improved high-frequency performance characteristics.

The extended operating temperature range (-40°C to 125°C) of the substitutes exceeds the original specification, providing additional thermal margin for applications operating at temperature extremes.

Selection Guidance:

• CM322522-100JL is suitable for applications requiring tape and reel packaging for automated assembly processes
• CM322522-100KL is suitable for applications requiring cut tape or Digi-Reel packaging for manual or semi-automated assembly
• Both substitutes are appropriate only for applications where current requirements do not exceed 140 mA
• Circuit validation is required to confirm acceptable performance with the higher DC resistance values

Frequently Asked Questions (FAQ)

Q: Can the CM322522-100JL or CM322522-100KL directly replace the CTX32CT-100-R in all applications?

A: Direct replacement is limited to applications where the circuit current requirement does not exceed 140 mA. The substitute parts are not suitable for designs requiring the full 300 mA current capacity of the original component. Additionally, the significantly higher DC resistance (2.1 Ohm versus 500 mOhm) will increase power dissipation and must be evaluated for thermal impact in the specific application.

Q: What is the difference between CM322522-100JL and CM322522-100KL?

A: Both parts are electrically identical with matching inductance (10 µH), current rating (140 mA), and DC resistance (2.1 Ohm maximum). The primary difference is packaging format: CM322522-100JL is supplied in Tape & Reel (TR) format, while CM322522-100KL is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements and handling preferences.

Q: Are the physical dimensions of the substitute parts compatible with the original PCB layout?

A: Yes. Both CM322522 variants maintain identical physical dimensions (0.126" L x 0.098" W, 3.20mm x 2.50mm) and maximum seated height (0.087", 2.20mm) as the CTX32CT-100-R. PCB footprints designed for the original component will accommodate the substitute parts without modification.

Q: What is the impact of the higher DC resistance in the substitute parts?

A: The DC resistance increase from 500 mOhm to 2.1 Ohm results in proportionally higher resistive losses. At 140 mA, the substitute generates approximately 0.41 mW of resistive power dissipation compared to 0.0098 mW for the original part. This difference must be considered in thermal budget calculations, particularly in high-density PCB designs or applications with limited thermal dissipation capability.

Q: Do the substitute parts meet the same environmental and compliance standards?

A: The CM322522 variants are ROHS3 compliant and REACH unaffected, meeting current environmental regulations. However, the Moisture Sensitivity Level (MSL) differs: the original CTX32CT-100-R is MSL 1 (unlimited shelf life), while the substitutes are MSL 3 (168 hours maximum exposure to 85°C/85% RH). Storage and handling procedures must account for this reduced moisture tolerance.

Q: What is the advantage of the higher Q factor in the substitute parts?

A: The CM322522 series exhibits a Q factor of 30 at 2.52 MHz compared to 15 for the original part, indicating lower losses and higher efficiency at the test frequency. This characteristic is beneficial for high-frequency filtering and impedance matching applications, though it does not offset the current rating limitation for applications requiring 300 mA operation.

Q: Can multiple CM322522 parts be paralleled to achieve the 300 mA current requirement?

A: Parallel configuration of inductors requires careful analysis of coupling effects and current distribution. While theoretically possible, this approach introduces design complexity, increased PCB area, and potential performance degradation. Circuit simulation and validation are necessary before implementing parallel configurations in production designs.