CTX32CT-1R0-R Equivalent & Substitute Parts

Part Overview

The CTX32CT-1R0-R is a 1 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 850 mA continuous current with a maximum DC resistance of 150 mOhm, housed in a 1210 (3225 Metric) package. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements. Substitute components must maintain the same inductance value, physical footprint, and mounting characteristics while accommodating variations in current rating, DC resistance, and core material properties.

Substiute Parts

CTX32CT-1R0-R

Eaton - Electronics DivisionIn Stock: 755CTX32CT-1R0-R Datasheet

Current PartRFQ

CM322522-1R0JL

Bourns Inc.In Stock: 747CM322522-1R0JL Datasheet

SimilarRFQ

CM322522-1R0KL

Bourns Inc.In Stock: 2013CM322522-1R0KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution analysis for the CTX32CT-1R0-R is based on the following critical parameters: inductance value (1 µH), physical package dimensions (1210 / 3225 Metric), surface mount compatibility, and unshielded drum core construction. The identified substitute parts—CM322522-1R0JL and CM322522-1R0KL from Bourns Inc.—share identical inductance specifications and package footprints. However, these substitutes operate at reduced current ratings (230 mA versus 850 mA) and exhibit higher DC resistance (690 mOhm versus 150 mOhm). Substitution is permissible only in applications where the circuit design accommodates the lower current capacity and increased resistive losses. Both Bourns alternatives feature ferrite core construction (versus ceramic in the original), operate across an extended temperature range (-40°C ~ 125°C), and maintain the same test frequency (7.96 MHz) and self-resonant frequency characteristics (115 MHz versus 100 MHz).

Parameter Comparison

Engineering Selection Recommendations

The CTX32CT-1R0-R is classified as obsolete, making the active Bourns CM322522 series (CM322522-1R0JL and CM322522-1R0KL) the primary alternatives for ongoing production and design continuity. Both Bourns substitutes maintain ROHS3 compliance and REACH unaffected status, supporting modern regulatory requirements. The selection between CM322522-1R0JL (±5% tolerance) and CM322522-1R0KL (±10% tolerance) depends on circuit tolerance requirements; the tighter tolerance variant (JL) is appropriate for precision applications, while the KL variant accommodates broader tolerance specifications. Critical design consideration: the Bourns alternatives operate at 230 mA maximum current versus the original 850 mA rating. Applications requiring the full 850 mA capacity cannot use these substitutes. Additionally, the increased DC resistance (690 mOhm versus 150 mOhm) introduces higher resistive losses; thermal and power dissipation analysis is required for current-limited applications. The ferrite core construction in Bourns parts provides superior Q factor (30 versus 10 at 7.96 MHz) and extended temperature range (-40°C ~ 125°C versus -25°C ~ 85°C), offering performance advantages in demanding thermal environments.

Frequently Asked Questions (FAQ)

Q: Can CM322522-1R0JL or CM322522-1R0KL directly replace CTX32CT-1R0-R in all applications?

A: Direct replacement is limited to applications where circuit current requirements do not exceed 230 mA. The original part supports 850 mA; substitutes are rated for 230 mA maximum. Additionally, the increased DC resistance (690 mOhm versus 150 mOhm) affects power dissipation and must be evaluated in thermal analysis.

Q: What is the difference between CM322522-1R0JL and CM322522-1R0KL?

A: Both parts are functionally identical except for inductance tolerance. CM322522-1R0JL specifies ±5% tolerance, while CM322522-1R0KL specifies ±10% tolerance. Selection depends on circuit tolerance requirements; precision applications benefit from the tighter JL tolerance.

Q: Are the physical dimensions identical between the original and substitute parts?

A: Yes. All three parts share identical external dimensions: 0.126" L x 0.098" W (3.20mm x 2.50mm) with maximum seated height of 0.087" (2.20mm). PCB footprint compatibility is maintained.

Q: What are the compliance differences?

A: The Bourns CM322522 series (both variants) are ROHS3 compliant and REACH unaffected. The original CTX32CT-1R0-R compliance status is not specified. Both Bourns parts carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original.

Q: How do core material differences affect performance?

A: The original uses ceramic core material; Bourns substitutes use ferrite core. Ferrite cores provide higher Q factor (30 versus 10 at 7.96 MHz), resulting in lower losses and better frequency response characteristics. Self-resonant frequency is slightly higher in Bourns parts (115 MHz versus 100 MHz).

Q: Can these substitutes operate in the original temperature range?

A: The Bourns substitutes support an extended temperature range (-40°C ~ 125°C) that encompasses the original specification (-25°C ~ 85°C). Applications within the original range are fully supported; extended temperature operation is available with the substitutes.