CTX32T-151-R Equivalent & Substitute Parts

Part Overview

The CTX32T-151-R is a 150 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 65 mA continuous current with a maximum DC resistance of 15 ohms and operates across a temperature range of -25°C to 85°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain the core inductance value, DC resistance specification, and physical form factor while accommodating variations in current rating and core material composition.

Substiute Parts

CTX32T-151-R

Eaton - Electronics DivisionIn Stock: 1014CTX32T-151-R Datasheet

Current PartRFQ

CM322522-151JL

Bourns Inc.In Stock: 1092CM322522-151JL Datasheet

SimilarRFQ

CM322522-151KL

Bourns Inc.In Stock: 5977CM322522-151KL Datasheet

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NLCV32T-151K-PF

TDK CorporationIn Stock: 22649NLCV32T-151K-PF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CTX32T-151-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 150 µH (fixed requirement)
• DC resistance: 15 Ohm maximum (fixed requirement)
• Shielding configuration: Unshielded (fixed requirement)
• Physical dimensions: 0.126" L x 0.098" W (3.20mm x 2.50mm) (fixed requirement)
• Mounting type: Surface Mount (fixed requirement)
• Q factor @ 796 kHz: 20 (fixed requirement)
• Self resonant frequency: 8 MHz (fixed requirement)

Allowable Variation Parameters:

• Current rating: Substitutes with equal or higher current capacity are acceptable
• Core material: Ceramic or ferrite core materials are interchangeable
• Inductance tolerance: ±5% or ±10% are both acceptable
• Operating temperature range: Extended ranges are acceptable
• Package designation: 1210 (3225 Metric) or equivalent nonstandard packages with identical physical dimensions are acceptable
• Product status: Active or Not For New Designs status substitutes are acceptable for obsolete parts

Parameter Comparison

Engineering Selection Recommendations

CM322522-151KL (Bourns Inc.) - Primary Substitute

The CM322522-151KL is the recommended primary substitute for the CTX32T-151-R. This part maintains all critical electrical parameters including 150 µH inductance, 15 Ohm maximum DC resistance, and identical physical dimensions. The part carries Active product status and ROHS3 compliance certification. The 50 mA current rating is lower than the original 65 mA specification; applications operating at or below 50 mA continuous current are fully compatible. The extended operating temperature range of -40°C to 125°C provides superior thermal performance compared to the original -25°C to 85°C range.

CM322522-151JL (Bourns Inc.) - Secondary Substitute

The CM322522-151JL is functionally equivalent to the CM322522-151KL with the exception of inductance tolerance specification (±5% versus ±10%). This part is suitable for applications requiring tighter inductance tolerance control. The same current rating limitation of 50 mA applies. Active product status and ROHS3 compliance are maintained.

NLCV32T-151K-PF (TDK Corporation) - Alternative Substitute

The NLCV32T-151K-PF provides superior current handling capability at 100 mA, exceeding the original 65 mA rating. The DC resistance is reduced to 7.93 Ohm maximum, providing lower power dissipation characteristics. Physical dimensions remain compatible with the original package footprint, though seated height increases to 0.094" (2.40mm) from the original 0.087" (2.20mm). Product status is classified as Not For New Designs; this part is suitable for replacement and maintenance applications but not recommended for new design implementations. ROHS3 compliance and REACH unaffected status are confirmed.

Frequently Asked Questions (FAQ)

Q: Can CM322522-151KL be used as a direct replacement for CTX32T-151-R in all applications?

A: The CM322522-151KL is electrically and mechanically compatible with the CTX32T-151-R for applications operating at continuous currents of 50 mA or below. If the original design requires the full 65 mA current rating, the NLCV32T-151K-PF with 100 mA rating is the appropriate substitute. All three substitute parts maintain the 150 µH inductance, 15 Ohm DC resistance, and identical physical footprint dimensions.

Q: What is the difference between CM322522-151JL and CM322522-151KL?

A: Both parts are manufactured by Bourns Inc. and share identical electrical performance and physical characteristics. The primary difference is inductance tolerance: CM322522-151JL specifies ±5% tolerance while CM322522-151KL specifies ±10% tolerance. Selection between these parts depends on application tolerance requirements. Both maintain 50 mA current rating and 15 Ohm maximum DC resistance.

Q: Why does NLCV32T-151K-PF have lower DC resistance than the original part?

A: The NLCV32T-151K-PF uses ferrite core material with optimized winding geometry to achieve 7.93 Ohm maximum DC resistance compared to the 15 Ohm specification of the CTX32T-151-R. This lower resistance results in reduced power dissipation and improved thermal performance. The part is suitable for applications where lower DC resistance is beneficial or neutral to circuit operation.

Q: Are there height clearance concerns with the NLCV32T-151K-PF substitute?

A: The NLCV32T-151K-PF has a maximum seated height of 0.094" (2.40mm) compared to 0.087" (2.20mm) for the original CTX32T-151-R. This 0.007" (0.20mm) increase must be evaluated against available PCB clearance in the target application. The lateral dimensions (0.126" L x 0.098" W) remain identical, so footprint compatibility is maintained.

Q: What is the significance of the "Not For New Designs" status on NLCV32T-151K-PF?

A: The "Not For New Designs" classification indicates that TDK Corporation does not recommend this part for incorporation into new product designs. However, the part remains suitable for replacement, repair, and maintenance of existing equipment. For new design implementations, CM322522-151KL or CM322522-151JL with Active product status are the preferred selections.

Q: Do all substitute parts meet RoHS and REACH compliance requirements?

A: CM322522-151JL and CM322522-151KL are certified ROHS3 compliant. NLCV32T-151K-PF is ROHS3 compliant with REACH unaffected status. The original CTX32T-151-R compliance status is not specified in the provided documentation. All three substitute parts meet current regulatory compliance standards for electronic component manufacturing and distribution.

Q: Can these inductors be used interchangeably in RF and high-frequency applications?

A: All substitute parts maintain the same Q factor of 20 at 796 kHz and self-resonant frequency of 8 MHz as the original CTX32T-151-R. These electrical characteristics are preserved across all substitute options, ensuring compatibility in RF and high-frequency circuit applications where these parameters are critical.