CTX32T-1R2-R Equivalent & Substitute Parts

Part Overview

The CTX32T-1R2-R is a 1.2 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 390 mA continuous current with a maximum DC resistance of 750 mOhm and operates across the temperature range of -25°C to 85°C. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

CTX32T-1R2-R

Eaton - Electronics DivisionIn Stock: 1032CTX32T-1R2-R Datasheet

Current PartRFQ

1210-122J

API Delevan Inc.In Stock: 11461210-122J Datasheet

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1210R-122J

API Delevan Inc.In Stock: 16831210R-122J Datasheet

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CM322522-1R2JL

Bourns Inc.In Stock: 1120CM322522-1R2JL Datasheet

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CM322522-1R2KL

Bourns Inc.In Stock: 10698CM322522-1R2KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CTX32T-1R2-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 1.2 µH
• Package / Case: 1210 (3225 Metric) surface mount form factor
• DC Resistance: 750 mOhm maximum
• Shielding configuration: Unshielded
• Self Resonant Frequency: 100 MHz

Secondary Compatibility Factors:

• Current Rating: Substitute must support minimum 390 mA
• Operating Temperature Range: Substitute must cover or exceed the application temperature window
• Q Factor @ 7.96 MHz: 30 (reference specification)

Four substitute parts meet these electrical and mechanical criteria. All substitutes maintain the 1.2 µH inductance, 750 mOhm maximum DC resistance, unshielded configuration, and 100 MHz self-resonant frequency. Current ratings and temperature ranges vary among substitutes, with all exceeding or matching the original 390 mA requirement.

Parameter Comparison

Engineering Selection Recommendations

API Delevan Inc. 1210-122J and 1210R-122J:

Both API Delevan parts provide 497 mA current rating, exceeding the original 390 mA specification. The 1210R-122J variant is ROHS3 compliant and represents the preferred selection for new designs requiring regulatory compliance. The 1210-122J is RoHS non-compliant but remains available for legacy system support. Both parts maintain standard 1210 (3225 Metric) package geometry and operate across -55°C to 125°C, providing extended temperature coverage. Inductance tolerance improves to ±5% compared to the original ±20%.

Bourns Inc. CM322522-1R2JL and CM322522-1R2KL:

Both Bourns parts are ROHS3 compliant and active products. These drum core wirewound inductors match the original construction type and physical dimensions (0.126" L x 0.098" W, 0.087" seated height). Current rating is 215 mA, which is below the original 390 mA specification. The CM322522-1R2JL offers ±5% tolerance, while the CM322522-1R2KL provides ±10% tolerance. Operating temperature range extends to -40°C to 125°C. Package designation is nonstandard, though physical dimensions align with 1210 form factor.

Selection Priority:

For applications requiring full current capacity (390 mA or higher), select 1210R-122J for compliance-critical designs or 1210-122J for legacy support. For applications with current requirements below 215 mA, Bourns CM322522 variants are suitable alternatives with improved compliance status and active product availability.

Frequently Asked Questions (FAQ)

Q: Can the CM322522-1R2JL or CM322522-1R2KL substitute for the CTX32T-1R2-R in all applications?

A: No. The Bourns CM322522 variants are rated for 215 mA maximum current, which is below the original 390 mA specification. These parts are suitable only for applications where the actual current requirement does not exceed 215 mA. Verify circuit current demands before selection.

Q: What is the difference between 1210-122J and 1210R-122J?

A: Both parts are electrically identical with 1.2 µH inductance, 497 mA current rating, and 750 mOhm DC resistance. The primary difference is regulatory compliance: 1210R-122J is ROHS3 compliant, while 1210-122J is RoHS non-compliant. For new designs, 1210R-122J is the preferred choice.

Q: Are the Bourns CM322522 parts in standard 1210 package?

A: The CM322522 parts are designated as nonstandard package, though physical dimensions (0.126" L x 0.098" W, 0.087" height) match the 1210 (3225 Metric) form factor. Verify PCB footprint compatibility before design implementation.

Q: Does the improved inductance tolerance of substitute parts affect circuit performance?

A: The substitute parts offer ±5% or ±10% tolerance compared to the original ±20%. Tighter tolerance improves circuit predictability and reduces performance variation. This is a beneficial characteristic for most applications.

Q: What is the impact of extended operating temperature range in substitute parts?

A: API Delevan and Bourns substitutes operate across wider temperature ranges (-55°C to 125°C or -40°C to 125°C) compared to the original -25°C to 85°C. This provides design flexibility for applications in extreme environments and improves long-term reliability margins.

Q: Can I use the CM322522-1R2KL in place of CM322522-1R2JL?

A: Yes. Both parts are electrically equivalent with identical inductance, current rating, and DC resistance. The difference is inductance tolerance: ±5% for JL variant and ±10% for KL variant. Selection depends on circuit tolerance requirements.