CTX32CT-2R2-R Equivalent & Substitute Parts

Part Overview

The CTX32CT-2R2-R is a 2.2 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 600 mA continuous current with a maximum DC resistance of 230mOhm and operates across the temperature range of -25°C to 85°C. The part is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain the 2.2 µH inductance specification while accommodating application-specific current and resistance requirements.

Substiute Parts

CTX32CT-2R2-R

Eaton - Electronics DivisionIn Stock: 1253CTX32CT-2R2-R Datasheet

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CM322522-2R2JL

Bourns Inc.In Stock: 981CM322522-2R2JL Datasheet

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CM322522-2R2KL

Bourns Inc.In Stock: 9083CM322522-2R2KL Datasheet

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NLCV32T-2R2M-PF

TDK CorporationIn Stock: 51221NLCV32T-2R2M-PF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CTX32CT-2R2-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 2.2 µH (exact match required)
• Mounting type: Surface Mount
• Physical footprint compatibility: 1210 (3225 Metric) package dimensions (0.126" L x 0.098" W)
• Shielding configuration: Unshielded

Secondary Compatibility Factors:

• Current rating must equal or exceed application requirements
• DC resistance must be acceptable for circuit performance
• Operating temperature range must encompass application environment
• Self-resonant frequency and Q factor must support intended frequency of operation

The substitute parts listed below maintain the 2.2 µH inductance and surface mount configuration. Variations in current rating, DC resistance, core material, and product status reflect different design approaches and availability considerations. Selection depends on whether the application current requirement aligns with each substitute's rated capacity and whether the DCR specification is compatible with circuit design parameters.

Parameter Comparison

Engineering Selection Recommendations

CM322522-2R2JL and CM322522-2R2KL (Bourns Inc.)

Both Bourns CM322522 variants are active products with RoHS3 compliance and REACH unaffected status. These parts feature ferrite core construction with improved Q factor (30 @ 7.96MHz) compared to the original CTX32CT-2R2-R. However, the current rating of 190 mA is significantly lower than the original 600 mA specification. These substitutes are suitable only for applications where the circuit current requirement does not exceed 190 mA. The higher DCR of 950mOhm Max versus the original 230mOhm Max must be evaluated for circuit performance impact. The CM322522-2R2KL offers ±10% tolerance versus ±5% for the CM322522-2R2JL, providing a middle ground for inductance accuracy. Both parts are supplied in nonstandard packaging configurations.

NLCV32T-2R2M-PF (TDK Corporation)

The TDK NLCV32T-2R2M-PF is classified as "Not For New Designs" but remains available with 51,200 pieces in stock. This part provides the highest current rating at 770 mA, exceeding the original 600 mA specification. The DCR of 169mOhm Max is superior to the original 230mOhm Max, offering lower power dissipation. The ferrite core construction delivers Q factor of 10 @ 7.96MHz, matching the original part. The operating temperature range extends to -40°C to 105°C, providing broader low-temperature capability than the original -25°C specification. The package is standard 1210 (3225 Metric) with a maximum seated height of 0.094" (2.40mm), which is 0.007" taller than the original. RoHS3 compliance and REACH unaffected status are confirmed. This part is suitable for applications requiring higher current capacity and lower resistance characteristics.

Product Status Considerations

The CTX32CT-2R2-R is obsolete, making the active-status Bourns CM322522 variants the preferred choice for new production when current requirements are below 190 mA. For applications requiring the original 600 mA capacity, the TDK NLCV32T-2R2M-PF provides superior electrical performance despite its "Not For New Designs" classification, with substantial inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the Bourns CM322522-2R2JL or CM322522-2R2KL be used as direct replacements for the CTX32CT-2R2-R?

A: Direct replacement is possible only if the application current requirement does not exceed 190 mA. Both Bourns parts are rated for 190 mA continuous current, compared to the original 600 mA rating. If the circuit draws more than 190 mA, these substitutes will not function within specification. The higher DCR of 950mOhm Max versus 230mOhm Max in the original part will increase power dissipation and must be evaluated for thermal impact.

Q: What is the difference between CM322522-2R2JL and CM322522-2R2KL?

A: Both parts are identical except for inductance tolerance. The CM322522-2R2JL offers ±5% tolerance, while the CM322522-2R2KL offers ±10% tolerance. Selection depends on the circuit's inductance accuracy requirements. The CM322522-2R2KL has significantly higher inventory availability (9,069 pieces versus 915 pieces).

Q: Is the TDK NLCV32T-2R2M-PF suitable for new designs?

A: The TDK NLCV32T-2R2M-PF is classified as "Not For New Designs," indicating that TDK does not recommend this part for new product development. However, it remains available for legacy system support and maintenance applications. For new designs, the active-status Bourns CM322522 variants are the recommended choice, subject to current rating compatibility.

Q: What does the "Nonstandard" package designation mean for the Bourns parts?

A: The Bourns CM322522 series uses a nonstandard package configuration despite maintaining the same physical footprint dimensions (0.126" L x 0.098" W) and height (0.087" max) as the original CTX32CT-2R2-R. This designation indicates the package does not conform to standard industry specifications but is mechanically compatible with 1210 (3225 Metric) PCB land patterns.

Q: How does the ferrite core material in the substitute parts compare to the ceramic core in the original?

A: The original CTX32CT-2R2-R uses ceramic core material, while all substitute parts use ferrite core construction. Ferrite cores typically provide higher Q factors (30 for Bourns versus 10 for the original) and better frequency stability. The self-resonant frequency increases from 68MHz to 80MHz in the Bourns parts, which may affect high-frequency circuit behavior. The TDK part maintains 68MHz self-resonant frequency, matching the original.

Q: What is the impact of the higher DCR in the Bourns substitutes?

A: The Bourns CM322522 parts have DCR of 950mOhm Max compared to 230mOhm Max in the original CTX32CT-2R2-R. This 4.1x increase in DC resistance will result in proportionally higher power dissipation at the same current level. For a 100 mA current, the Bourns part dissipates approximately 95 mW compared to 23 mW in the original. This must be evaluated for thermal management and circuit performance.

Q: Can the TDK NLCV32T-2R2M-PF handle higher currents than the original part?

A: Yes. The TDK NLCV32T-2R2M-PF is rated for 770 mA continuous current, compared to 600 mA for the original CTX32CT-2R2-R. Additionally, the TDK part has lower DCR of 169mOhm Max, resulting in lower power dissipation and better thermal performance at equivalent current levels.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance certification. The original CTX32CT-2R2-R does not specify RoHS status in the provided data.

Q: What is the height difference between the TDK part and the original?

A: The TDK NLCV32T-2R2M-PF has a maximum seated height of 0.094" (2.40mm), compared to 0.087" (2.20mm) for the original CTX32CT-2R2-R. This 0.007" (0.20mm) difference must be verified for PCB clearance and assembly compatibility, particularly in space-constrained applications.