CMT2-2-R Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMT2-2-R is a 20 mH common mode choke manufactured by Eaton - Electronics Division, designed for two-line power line filtering applications in through-hole configurations. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and legacy system support.

Substiute Parts

CMT2-2-R

Eaton - Electronics DivisionIn Stock: 1121CMT2-2-R Datasheet

Current PartRFQ

EV35-2.0-02-20M

Schaffner EMC Inc.In Stock: 898EV35-2.0-02-20M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMT2-2-R is determined by the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 20 mH nominal
• Number of lines: 2-line configuration
• Mounting type: Through hole
• Package configuration: Vertical, 4 PC pin
• Filter application: Power line common mode filtering

Secondary Compatibility Parameters:

• Current rating: Substitute must support minimum 1.95A
• DC resistance: Lower DCR values are acceptable
• Operating temperature range: Substitute must cover or exceed the application temperature requirements
• Physical dimensions: Substitute footprint must be compatible with existing PCB layouts

The EV35-2.0-02-20M from Schaffner EMC Inc. meets these substitution criteria with equivalent inductance, line configuration, and mounting specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: EV35-2.0-02-20M

The EV35-2.0-02-20M is the direct functional equivalent for the obsolete CMT2-2-R. Selection of this substitute is based on:

• Identical inductance specification (20 mH)
• Matching two-line configuration and through-hole mounting
• Higher current rating (2A vs. 1.95A) provides design margin
• Lower DC resistance (150mOhm vs. 220mOhm) reduces power dissipation
• Active product status ensures ongoing availability
• ROHS3 compliance supports modern manufacturing and environmental standards

Temperature Range Consideration:

The EV35-2.0-02-20M operates within -25°C to 100°C, which is narrower than the CMT2-2-R range of -40°C to 125°C. Applications requiring operation below -25°C or above 100°C must evaluate alternative sources or confirm that the EV35-2.0-02-20M meets specific system requirements.

Physical Dimensions:

Both parts maintain similar footprints (CMT2-2-R: 36.50mm L × 26.50mm W; EV35-2.0-02-20M: 36.00mm L × 24.50mm W), ensuring compatibility with existing through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the EV35-2.0-02-20M directly replace the CMT2-2-R without PCB modifications?

A: Yes. Both components share identical mounting type (through hole), package configuration (vertical, 4 PC pin), and equivalent physical dimensions. No PCB layout changes are required.

Q: What is the significance of the different frequency specifications (10 kHz vs. 400 Hz)?

A: The inductance value of 20 mH is specified at different measurement frequencies. Both parts deliver 20 mH inductance for power line filtering applications. The frequency specification indicates the test condition used by each manufacturer; both are suitable for common mode choke applications.

Q: Is the lower DC resistance of the EV35-2.0-02-20M an advantage?

A: Yes. The EV35-2.0-02-20M exhibits 150mOhm typical DCR compared to 220mOhm for the CMT2-2-R. Lower DCR reduces resistive losses and heat generation, improving overall circuit efficiency.

Q: Does the narrower operating temperature range of the EV35-2.0-02-20M affect compatibility?

A: The EV35-2.0-02-20M operates from -25°C to 100°C, compared to the CMT2-2-R range of -40°C to 125°C. For applications operating within the -25°C to 100°C window, the substitute is fully compatible. Applications requiring extended temperature operation must verify system requirements against the substitute's specifications.

Q: What compliance advantages does the EV35-2.0-02-20M offer?

A: The EV35-2.0-02-20M is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The CMT2-2-R compliance status is not specified in available documentation.

Q: Are there inventory considerations for this substitution?

A: The CMT2-2-R has 1065 pieces in stock (obsolete status). The EV35-2.0-02-20M has 811 pieces available (active product). For new designs, the active EV35-2.0-02-20M is recommended to ensure long-term supply continuity.