CTX32CT-4R7-R Equivalent & Substitute Parts

Part Overview

The CTX32CT-4R7-R is a 4.7 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 430 mA continuous current with a maximum DC resistance of 340 mOhm, housed in a 1210 (3225 Metric) package. The part is classified as obsolete, necessitating identification of active equivalent components for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±20%
Current Rating	430 mA
DC Resistance (DCR)	340 mOhm Max
Core Material	Ceramic
Shielding	Unshielded
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-25°C ~ 85°C
Q @ 7.96 MHz	15
Self Resonant Frequency	46 MHz
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CTX32CT-4R7-R is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 4.7 µH (exact match required)
Inductance tolerance: ±20% or tighter
Mounting type: Surface Mount
Package footprint: 1210 (3225 Metric) or compatible nonstandard equivalent
Shielding configuration: Unshielded

Secondary Compatibility Factors:

Current rating: Must equal or exceed 430 mA
DC resistance: Must not exceed 340 mOhm Max
Operating temperature range: Must encompass -25°C ~ 85°C minimum
Core material: Ceramic or ferrite acceptable
Moisture sensitivity: MSL 1 or equivalent

The substitute parts listed below satisfy the primary matching criteria. Variations in secondary parameters reflect different design approaches while maintaining functional equivalence within the specified electrical envelope.

Parameter Comparison

Parameter	CTX32CT-4R7-R (Main)	CM322522-4R7JL	CM322522-4R7KL	NLCV32T-4R7M-PFR
Manufacturer	Eaton - Electronics Division	Bourns Inc.	Bourns Inc.	TDK Corporation
Inductance	4.7 µH	4.7 µH	4.7 µH	4.7 µH
Inductance Tolerance	±20%	±5%	±10%	±20%
Current Rating (Amps)	430 mA	165 mA	165 mA	900 mA
DC Resistance (DCR)	340 mOhm Max	1.5 Ohm Max	1.5 Ohm Max	240 mOhm Max
Core Material	Ceramic	Ferrite	Ferrite	Ferrite
Shielding	Unshielded	Unshielded	Unshielded	Unshielded
Package / Case	1210 (3225 Metric)	Nonstandard	Nonstandard	1210 (3225 Metric)
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.50mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)	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)	0.087" (2.20mm)	0.087" (2.20mm)	0.094" (2.40mm)
Operating Temperature Range	-25°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Q @ 7.96 MHz	15	30	30	15
Self Resonant Frequency	46 MHz	55 MHz	55 MHz	46 MHz
Product Status	Obsolete	Active	Active	Not For New Designs
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

NLCV32T-4R7M-PFR (TDK Corporation) - Primary Substitute

The NLCV32T-4R7M-PFR provides the closest electrical and mechanical alignment to the CTX32CT-4R7-R. Both components feature identical inductance (4.7 µH), matching ±20% tolerance, identical package designation (1210 / 3225 Metric), and equivalent self-resonant frequency (46 MHz). The TDK part delivers superior current handling (900 mA versus 430 mA) with lower DC resistance (240 mOhm Max versus 340 mOhm Max), providing enhanced performance margin. The part is ROHS3 compliant and REACH unaffected. However, the product status is classified as "Not For New Designs," indicating this is a transitional option suitable for legacy system support and existing production runs.

CM322522-4R7JL and CM322522-4R7KL (Bourns Inc.) - Secondary Substitutes

Both Bourns components share identical inductance (4.7 µH), unshielded drum core construction, and footprint dimensions (3.20mm x 2.50mm). These parts are active products with ROHS3 compliance. However, both exhibit significant limitations: current rating of 165 mA (61% of the main part requirement) and DC resistance of 1.5 Ohm Max (4.4 times higher than the main part). These components are suitable only for applications where current demand does not exceed 165 mA and where higher DC resistance is acceptable. The CM322522-4R7JL offers tighter inductance tolerance (±5%) compared to CM322522-4R7KL (±10%).

Recommendation Summary:

For direct replacement in existing designs operating at or near 430 mA current levels, the NLCV32T-4R7M-PFR is the appropriate selection. For new designs, consult TDK for current-generation alternatives to the NLCV-PF series. The Bourns CM322522 variants are applicable only to reduced-current applications below 165 mA.

Frequently Asked Questions (FAQ)

Q: Can CM322522-4R7JL or CM322522-4R7KL directly replace CTX32CT-4R7-R in existing circuits?

A: Direct replacement is not recommended. Both Bourns parts are rated for 165 mA maximum current, which is 38% below the CTX32CT-4R7-R specification of 430 mA. Additionally, the DC resistance of 1.5 Ohm Max is significantly higher than the 340 mOhm Max of the main part. These components are suitable only for applications with current requirements below 165 mA and where increased DC resistance is acceptable.

Q: What is the difference between CM322522-4R7JL and CM322522-4R7KL?

A: Both parts are electrically and mechanically identical except for inductance tolerance. CM322522-4R7JL specifies ±5% tolerance, while CM322522-4R7KL specifies ±10% tolerance. Selection depends on circuit tolerance requirements. Both are active products with identical current ratings, DC resistance, and operating temperature ranges.

Q: Is NLCV32T-4R7M-PFR suitable for new product designs?

A: The NLCV32T-4R7M-PFR is classified as "Not For New Designs" by TDK Corporation. This part is appropriate for legacy system support, maintenance, and existing production continuity. For new designs, contact TDK directly to identify current-generation 4.7 µH inductor alternatives in the 1210 package with equivalent or superior current handling capability.

Q: Are all substitute parts compatible with the original PCB layout?

A: All substitute parts share the same footprint dimensions (0.126" L x 0.098" W / 3.20mm x 2.50mm). The NLCV32T-4R7M-PFR and CTX32CT-4R7-R have identical seated height (0.087" / 2.20mm). The Bourns CM322522 variants also match this height specification. PCB layout compatibility is confirmed for all listed substitutes.

Q: What is the operating temperature range difference between the main part and substitutes?

A: The CTX32CT-4R7-R operates from -25°C to 85°C. All substitute parts extend the lower temperature limit to -40°C and the upper limit to 125°C, providing broader environmental coverage. Circuits designed for the original -25°C to 85°C range will operate within the substitute parts' specifications.

Q: Are the substitute parts RoHS compliant?

A: Yes. NLCV32T-4R7M-PFR, CM322522-4R7JL, and CM322522-4R7KL are all ROHS3 compliant. The main part CTX32CT-4R7-R does not specify RoHS status in the provided data.

Q: What does "Not For New Designs" mean for NLCV32T-4R7M-PFR?

A: This designation indicates that TDK has transitioned this product to end-of-life status and does not recommend its use in new product development. The part remains available for existing production support and legacy system maintenance. For new designs, alternative current-generation inductors should be evaluated.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message