CTX32T-150-R Equivalent & Substitute Parts

Part Overview

The CTX32T-150-R is a 15 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, rated for 130 mA maximum current with 2.8 Ohm maximum DC resistance in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Inductance	15 µH
Current Rating	130 mA
DC Resistance (Max)	2.8 Ohm
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Shielding	Unshielded
Operating Temperature Range	-25°C ~ 85°C
Q @ Frequency	30 @ 2.52 MHz
Frequency - Self Resonant	30 MHz
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CTX32T-150-R is determined by strict equivalence across the following critical parameters: inductance value (15 µH), DC resistance maximum (2.8 Ohm), package form factor (1210 / 3225 Metric), mounting type (surface mount), and shielding configuration (unshielded). The current rating and operating temperature range define the operational envelope within which substitutes must function. All identified substitute parts maintain the core electrical specifications of 15 µH inductance and 2.8 Ohm maximum DC resistance, ensuring functional compatibility at the circuit level. Variations in current rating, tolerance, core material, and temperature range are secondary parameters that must be evaluated against specific application requirements.

Parameter Comparison

Parameter	CTX32T-150-R (Eaton)	1210-153J (API Delevan)	CM322522-150JL (Bourns)	CM322522-150KL (Bourns)
Inductance	15 µH	15 µH	15 µH	15 µH
Tolerance	±10%	±5%	±5%	±10%
Current Rating (Amps)	130 mA	257 mA	120 mA	120 mA
DC Resistance (Max)	2.8 Ohm	2.8 Ohm	2.8 Ohm	2.8 Ohm
Q @ Frequency	30 @ 2.52 MHz	30 @ 2.5 MHz	30 @ 2.52 MHz	30 @ 2.52 MHz
Frequency - Self Resonant	30 MHz	25 MHz	30 MHz	30 MHz
Operating Temperature Range	-25°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)	Nonstandard	Nonstandard
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.50mm)	0.128" L x 0.095" W (3.25mm x 2.42mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max)	0.087" (2.20mm)	0.101" (2.57mm)	0.087" (2.20mm)	0.087" (2.20mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Shielding	Unshielded	Unshielded	Unshielded	Unshielded
Product Status	Obsolete	Active	Active	Active
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

1210-153J (API Delevan Inc.): This substitute offers active product status with higher current rating capability (257 mA versus 130 mA), providing design margin for applications requiring increased current capacity. The ±5% inductance tolerance provides tighter specification control compared to the original ±10% tolerance. Extended operating temperature range (-55°C ~ 125°C) accommodates broader environmental conditions. Physical dimensions are nominally equivalent with minor variations (0.128" L x 0.095" W versus 0.126" L x 0.098" W). Self-resonant frequency is reduced to 25 MHz. RoHS non-compliance status requires evaluation against regulatory requirements for the target application.

CM322522-150JL (Bourns Inc.): This substitute maintains active product status with ROHS3 compliance and REACH unaffected status, suitable for regulated applications. Current rating of 120 mA is below the original 130 mA specification, requiring verification that application current demands do not exceed this limit. Inductance tolerance of ±5% provides improved specification control. Operating temperature range extends to -40°C ~ 125°C. Physical dimensions and height are identical to the original part. Nonstandard package classification requires confirmation of PCB footprint compatibility.

CM322522-150KL (Bourns Inc.): This substitute provides active product status with ROHS3 compliance and REACH unaffected status. Inductance tolerance matches the original ±10% specification. Current rating of 120 mA is below the original 130 mA specification. Operating temperature range extends to -40°C ~ 125°C. Physical dimensions and height are identical to the original part. Nonstandard package classification requires confirmation of PCB footprint compatibility. Cut Tape and Digi-Reel packaging offers high inventory availability (20,817 pieces in stock).

Frequently Asked Questions (FAQ)

Q: Can the 1210-153J substitute for the CTX32T-150-R in all applications?

A: The 1210-153J maintains electrical equivalence at the core specifications (15 µH inductance, 2.8 Ohm DC resistance). The higher current rating (257 mA) provides additional design margin. However, the reduced self-resonant frequency (25 MHz versus 30 MHz) and RoHS non-compliance status must be evaluated against specific circuit requirements and regulatory constraints.

Q: Why do the Bourns CM322522 parts have lower current ratings than the original?

A: The CM322522-150JL and CM322522-150KL are rated for 120 mA maximum current, which is below the original 130 mA specification. These parts are suitable only for applications where circuit current demands do not exceed 120 mA. Applications requiring the full 130 mA capability must use the 1210-153J or confirm that actual operating current remains below 120 mA.

Q: What is the significance of "Nonstandard" package classification for the Bourns parts?

A: The CM322522-150JL and CM322522-150KL are classified as nonstandard package types despite maintaining identical physical dimensions (0.126" L x 0.098" W, 3.20mm x 2.50mm) and height (0.087", 2.20mm) to the original part. PCB footprint compatibility must be confirmed with the component manufacturer or through physical verification before design implementation.

Q: Are all substitute parts RoHS compliant?

A: The 1210-153J is RoHS non-compliant. The CM322522-150JL and CM322522-150KL are ROHS3 compliant. Applications subject to RoHS regulations must use the Bourns CM322522 series parts or confirm exemption applicability for the API Delevan 1210-153J.

Q: How do inductance tolerances affect circuit performance?

A: The original CTX32T-150-R specifies ±10% inductance tolerance. The 1210-153J and CM322522-150JL offer tighter ±5% tolerance, reducing inductance variation across production batches. The CM322522-150KL maintains ±10% tolerance matching the original specification. Tighter tolerances reduce circuit performance variation but do not alter functional compatibility.

Q: What is the impact of different operating temperature ranges?

A: The original part operates from -25°C to 85°C. The 1210-153J extends this to -55°C to 125°C, and the Bourns parts extend to -40°C to 125°C. These extended ranges provide capability for broader environmental conditions but do not restrict use in the original temperature envelope. Applications operating within -25°C to 85°C are compatible with all substitutes.

Q: Can packaging type affect PCB assembly compatibility?

A: The 1210-153J uses standard 1210 (3225 Metric) package classification. The Bourns CM322522 parts use nonstandard package classification despite identical physical dimensions. Packaging classification may affect automated assembly equipment recognition and placement accuracy. Confirmation with assembly partners is recommended before production implementation.

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