CTX32T-820-R Equivalent & Substitute Parts Reference

Part Overview

The CTX32T-820-R is an 82 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This component is rated for 45 mA maximum current with 10 Ohm DC resistance in a 1210 (3225 Metric) surface mount package. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

CTX32T-820-R

Eaton - Electronics DivisionIn Stock: 1058CTX32T-820-R Datasheet

Current PartRFQ

CM322522-820JL

Bourns Inc.In Stock: 783CM322522-820JL Datasheet

DirectRFQ

CM322522-820KL

Bourns Inc.In Stock: 1026CM322522-820KL Datasheet

DirectRFQ

1210-823J

API Delevan Inc.In Stock: 10291210-823J Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CTX32T-820-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 82 µH (exact match required)
• DC Resistance: 10 Ohm Max (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 45 mA minimum
• Operating Temperature Range: Substitute must support the application's thermal requirements
• Package dimensions: Physical compatibility with 1210 form factor or equivalent footprint
• Tolerance: ±10% or tighter acceptable

The identified substitutes meet the primary matching criteria. Variations in core material (ceramic versus ferrite), current rating capacity, and operating temperature ranges are secondary considerations that depend on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

CM322522-820JL and CM322522-820KL (Bourns Inc.): Both Bourns substitutes are active products with ROHS3 compliance and REACH unaffected status. These parts maintain identical inductance, DCR, and physical dimensions to the original CTX32T-820-R. The CM322522-820JL offers ±5% tolerance with 60 mA current rating, while CM322522-820KL provides ±10% tolerance matching the original specification. Both support extended operating temperature range (-40°C ~ 125°C) and are available in Tape & Reel packaging. The ferrite core construction differs from the original ceramic core but maintains equivalent electrical performance at the specified test frequency.

1210-823J (API Delevan Inc.): This substitute provides the highest current rating (136 mA) and widest operating temperature range (-55°C ~ 125°C). The 1210 (3225 Metric) package designation matches the original form factor precisely. However, this part exhibits slightly different physical dimensions (height 0.101" versus 0.087") and lower self-resonant frequency (9MHz versus 11MHz). RoHS non-compliance status requires evaluation against application regulatory requirements.

Selection Criteria:

• For applications requiring active product status and compliance certifications: Select CM322522-820JL or CM322522-820KL
• For applications with extended temperature or current requirements: Evaluate 1210-823J with consideration of RoHS compliance impact
• For applications with strict dimensional constraints: Verify PCB layout compatibility with height variations

Frequently Asked Questions (FAQ)

Q: Can CM322522-820JL or CM322522-820KL directly replace CTX32T-820-R in existing designs?

A: Both Bourns parts maintain the same inductance (82 µH), DC resistance (10 Ohm Max), and physical footprint dimensions (3.20mm x 2.50mm x 2.20mm max height). The primary difference is core material (ferrite versus ceramic) and extended operating temperature range. Electrical performance at the specified test frequency (2.52 MHz) is equivalent. Verification of application-specific thermal and frequency requirements is necessary.

Q: What is the difference between CM322522-820JL and CM322522-820KL?

A: Both parts are manufactured by Bourns Inc. in the CM322522 series with identical inductance, current rating, and physical dimensions. The primary distinction is inductance tolerance: CM322522-820JL specifies ±5% tolerance, while CM322522-820KL specifies ±10% tolerance matching the original CTX32T-820-R specification.

Q: Why does 1210-823J have different physical dimensions?

A: The 1210-823J manufactured by API Delevan Inc. exhibits a maximum seated height of 0.101" (2.57mm) compared to 0.087" (2.20mm) for the original part. Length and width dimensions are nominally equivalent (0.128" x 0.095" versus 0.126" x 0.098"). PCB layout clearance must be verified before substitution.

Q: Are all substitute parts available in the same packaging format?

A: The Bourns CM322522 series parts are supplied in Tape & Reel (TR) packaging. The API Delevan 1210-823J is also available in Tape & Reel format. The original CTX32T-820-R packaging format is not specified in available data.

Q: What is the impact of core material differences on circuit performance?

A: The original CTX32T-820-R uses ceramic core material, while all identified substitutes employ ferrite core construction. Both materials achieve equivalent Q factor (30 @ 2.52MHz) and self-resonant frequency characteristics (11MHz for Bourns parts, 9MHz for API Delevan). Core material selection affects temperature stability and frequency response characteristics; application-specific performance testing is recommended for critical circuits.

Q: Which substitute offers the best compliance profile?

A: CM322522-820JL and CM322522-820KL both carry ROHS3 compliance and REACH unaffected status with active product designation. The 1210-823J is RoHS non-compliant, requiring evaluation against application regulatory requirements and customer specifications.