CMT1-2-R Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMT1-2-R is a 49 mH, 2-line common mode choke manufactured by Eaton - Electronics Division, designed for power line filtering applications in through-hole configurations. This component operates at 880mA maximum current with a typical DC resistance of 850mOhm and supports operating temperatures from -40°C to 125°C.

The CMT1-2-R is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

CMT1-2-R

Eaton - Electronics DivisionIn Stock: 1051CMT1-2-R Datasheet

Current PartRFQ

B82724B2152N020

EPCOS - TDK ElectronicsIn Stock: 918B82724B2152N020 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMT1-2-R is determined by the following critical parameters that must remain functionally equivalent:

Core Electrical Parameters:

• Inductance value: 49 mH @ 10 kHz (fixed requirement)
• Number of lines: 2-line configuration (fixed requirement)
• Filter type: Power line common mode choke (fixed requirement)
• Operating temperature range: -40°C ~ 125°C (minimum requirement)

Mechanical Compatibility Parameters:

• Mounting type: Through hole (fixed requirement)
• Pin configuration: 4 PC pin (fixed requirement)

Performance Tolerance Parameters:

• Current rating: Must equal or exceed 880mA
• DC resistance: Acceptable within typical engineering tolerances for the application

The substitute part B82724B2152N020 meets all core electrical and mechanical requirements. It maintains the same inductance value, line configuration, filter type, and operating temperature range. The substitute provides enhanced current rating (1.5A versus 880mA) and improved DC resistance characteristics (530mOhm versus 850mOhm), representing a performance upgrade while maintaining functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The B82724B2152N020 is a direct functional substitute for the CMT1-2-R based on matching core electrical specifications: identical inductance (49 mH @ 10 kHz), identical line configuration (2-line), identical filter type (power line), and identical operating temperature range (-40°C ~ 125°C).

Product Status Consideration:

The CMT1-2-R is obsolete, while the B82724B2152N020 is active. Selection of the active substitute ensures long-term supply chain availability and ongoing manufacturer support.

Compliance and Certification:

The B82724B2152N020 carries multiple international approvals (ENEC, UR, VDE) and is ROHS3 compliant and REACH affected, providing enhanced regulatory compliance documentation compared to the CMT1-2-R.

Performance Enhancement:

The substitute provides improved electrical performance: current rating increased from 880mA to 1.5A and DC resistance reduced from 850mOhm to 530mOhm. These improvements represent performance upgrades that do not compromise compatibility.

Mechanical Considerations:

The substitute differs in package orientation (horizontal versus vertical) and physical dimensions. PCB layout modifications may be required to accommodate the larger footprint (33.60mm x 32.60mm versus 29.50mm x 22.00mm) and different height profile (25.00mm versus 36.50mm). Pin configuration remains compatible (4 PC pin through-hole).

Frequently Asked Questions (FAQ)

Q: Can the B82724B2152N020 directly replace the CMT1-2-R without circuit modifications?

A: Electrical substitution is direct. The inductance value, line configuration, and operating temperature range are identical. However, mechanical substitution requires PCB layout evaluation due to differences in package orientation and physical dimensions.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) Product status—CMT1-2-R is obsolete while B82724B2152N020 is active; (2) Current rating—B82724B2152N020 supports 1.5A versus 880mA; (3) DC resistance—B82724B2152N020 has lower resistance (530mOhm versus 850mOhm); (4) Package orientation—B82724B2152N020 is horizontal while CMT1-2-R is vertical; (5) Physical dimensions—B82724B2152N020 is larger; (6) Certifications—B82724B2152N020 carries ENEC, UR, VDE approvals and ROHS3 compliance.

Q: Is the higher current rating of the B82724B2152N020 a concern for my application?

A: No. A higher current rating indicates the substitute can handle equal or greater current loads. If your application requires 880mA, the B82724B2152N020 rated for 1.5A will operate safely within its specifications.

Q: Will the lower DC resistance of the B82724B2152N020 affect circuit performance?

A: Lower DC resistance (530mOhm versus 850mOhm) reduces power dissipation and heat generation, representing an improvement. This change will not negatively impact circuit function.

Q: What PCB layout considerations apply to the B82724B2152N020?

A: The substitute has a larger footprint (33.60mm x 32.60mm versus 29.50mm x 22.00mm) and different height (25.00mm versus 36.50mm). Verify available PCB space and confirm the horizontal orientation is compatible with your board layout before implementation.

Q: Are there any regulatory compliance advantages to using the B82724B2152N020?

A: Yes. The B82724B2152N020 carries ENEC, UR, and VDE certifications and is ROHS3 compliant, providing documented regulatory compliance. The CMT1-2-R does not specify these certifications.

Q: Can I use the CMT1-2-R if I still have inventory?

A: Yes, if your application requirements are met by the CMT1-2-R specifications. However, given its obsolete status, transitioning to the active B82724B2152N020 is recommended for new designs and long-term production continuity.