Equivalent & Substitute Parts for CTX32T-8R2-R

Part Overview

The CTX32T-8R2-R is an 8.2 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 170 mA maximum current with 2 Ohm DC resistance in a 1210 (3225 Metric) package. The part is classified as obsolete, necessitating identification of active substitute components that maintain electrical and mechanical compatibility for new designs or production continuity.

Substiute Parts

CTX32T-8R2-R

Eaton - Electronics DivisionIn Stock: 1119CTX32T-8R2-R Datasheet

Current PartRFQ

1210-822J

API Delevan Inc.In Stock: 8341210-822J Datasheet

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CM322522-8R2JL

Bourns Inc.In Stock: 933CM322522-8R2JL Datasheet

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CM322522-8R2KL

Bourns Inc.In Stock: 1627CM322522-8R2KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CTX32T-8R2-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 8.2 µH (exact match required)
• DC Resistance: 2 Ohm Max (exact match required)
• Package / Case: 1210 (3225 Metric) (exact match required)
• Shielding: Unshielded (exact match required)
• Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Factors:

• Current Rating: Substitute must equal or exceed 170 mA
• Operating Temperature Range: Substitute must cover or exceed -25°C ~ 85°C
• Q @ Frequency: Substitute must maintain 30 @ 7.96 MHz or equivalent performance
• Self Resonant Frequency: Substitute must be 40 MHz or higher

The three substitute parts listed below satisfy all primary matching criteria and maintain electrical performance within acceptable tolerances for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

1210-822J (API Delevan Inc.)

This substitute provides the highest current rating at 305 mA, exceeding the original 170 mA specification. The part maintains standard 1210 (3225 Metric) package dimensions and unshielded configuration. Operating temperature range extends to -55°C ~ 125°C, covering the original -25°C ~ 85°C requirement. Inductance tolerance of ±5% is tighter than the original ±20%. However, self resonant frequency is 35 MHz, which is 5 MHz lower than the original 40 MHz specification. RoHS non-compliance status must be evaluated against application requirements.

CM322522-8R2JL (Bourns Inc.)

This substitute maintains exact electrical specifications including Q @ 7.96 MHz and 40 MHz self resonant frequency. Operating temperature range of -40°C ~ 125°C exceeds original requirements. Inductance tolerance of ±5% provides improved precision. Current rating of 140 mA is below the original 170 mA specification and represents a limitation for high-current applications. Package designation is listed as nonstandard, though physical dimensions (0.126" L x 0.098" W, 0.087" height) match the original. ROHS3 compliance and REACH unaffected status support regulatory requirements.

CM322522-8R2KL (Bourns Inc.)

This substitute provides identical electrical performance to CM322522-8R2JL with inductance tolerance of ±10% (versus ±5%). Current rating of 140 mA matches the JL variant and remains below the original 170 mA specification. Operating temperature range, self resonant frequency, and Q factor are equivalent to the JL variant. Physical dimensions and ROHS3 compliance are identical. This variant is suitable for applications where ±10% inductance tolerance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the 1210-822J substitute for CTX32T-8R2-R in all applications?

A: The 1210-822J matches all primary criteria (inductance, DCR, package, shielding) and exceeds current rating specifications. However, the self resonant frequency is 35 MHz versus the original 40 MHz. Applications sensitive to high-frequency performance above 35 MHz require evaluation. RoHS non-compliance status must be verified against design requirements.

Q: Why do the Bourns CM322522 variants show lower current ratings than the original?

A: The CM322522-8R2JL and CM322522-8R2KL are rated for 140 mA maximum current, which is 30 mA below the original CTX32T-8R2-R specification of 170 mA. These parts are suitable only for applications operating at or below 140 mA. For circuits requiring the full 170 mA rating, the 1210-822J is the appropriate substitute.

Q: What is the difference between CM322522-8R2JL and CM322522-8R2KL?

A: Both parts are electrically and mechanically identical except for inductance tolerance. The JL variant specifies ±5% tolerance, while the KL variant specifies ±10% tolerance. Selection depends on circuit tolerance requirements. The JL variant provides tighter inductance control for precision applications.

Q: Are the Bourns parts physically compatible with the original 1210 package?

A: The Bourns CM322522 variants are designated as nonstandard package, though physical dimensions (3.20mm L x 2.50mm W x 2.20mm height) match the original 1210 (3225 Metric) specification. PCB footprint compatibility should be verified before implementation.

Q: Which substitute is recommended for new designs?

A: Selection depends on current requirements and regulatory compliance. For applications requiring 170 mA or higher current capacity, the 1210-822J is the only suitable option. For applications operating at 140 mA or below, the Bourns CM322522-8R2KL or CM322522-8R2JL are preferred due to ROHS3 compliance and extended operating temperature range.

Q: Do all substitutes maintain the same operating temperature range as the original?

A: No. The original CTX32T-8R2-R operates from -25°C ~ 85°C. The 1210-822J extends to -55°C ~ 125°C, and both Bourns variants operate from -40°C ~ 125°C. All substitutes cover or exceed the original temperature range, providing improved thermal performance.