CMT2-1-R Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMT2-1-R is a 30 mH common mode choke manufactured by Eaton - Electronics Division, designed for two-line power line filtering applications. This component operates at 1.5A maximum current with a typical DC resistance of 350 mOhm and is rated for operating temperatures between -40°C and 125°C. The CMT2-1-R carries an obsolete product status, making identification of functionally equivalent substitute components necessary for ongoing system support and procurement planning.

Substiute Parts

CMT2-1-R

Eaton - Electronics DivisionIn Stock: 701CMT2-1-R Datasheet

Current PartRFQ

SS35V-15300

KEMETIn Stock: 935SS35V-15300 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMT2-1-R is determined by the following critical parameters:

Core Functional Requirements:

• Filter Type: Power Line
• Number of Lines: 2
• Current Rating: 1.5A minimum
• Mounting Type: Through Hole

Electrical Compatibility Criteria:

• Inductance: 30 mH (measured at specified frequency)
• DC Resistance: Must not exceed application tolerance limits
• Operating Temperature Range: Must encompass or match the required operating envelope

Physical Compatibility:

• Package configuration must accommodate board layout constraints
• Pin count and spacing must be compatible with existing PCB designs

The SS35V-15300 from KEMET meets the core functional requirements as a two-line, 30 mH common mode choke rated for 1.5A through-hole mounting. Variations in inductance measurement frequency (1 kHz vs. 10 kHz), DC resistance (480 mOhm vs. 350 mOhm), and operating temperature range represent measurable differences that must be evaluated within specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

CMT2-1-R (Eaton) - Obsolete Status: The CMT2-1-R is classified as obsolete, indicating discontinued manufacturing and limited availability for future procurement. Existing inventory of 672 pieces supports short-term replacement and repair applications only. Long-term system designs should not incorporate this component.

SS35V-15300 (KEMET) - Active Status: The SS35V-15300 maintains active product status with confirmed inventory of 825 pieces, ensuring availability for current and future procurement cycles. This component carries ROHS3 compliance certification and REACH unaffected status, meeting modern regulatory requirements. The SS35V-15300 is suitable for new designs and ongoing production support.

Key Differences Requiring Evaluation:

1. DC Resistance: The SS35V-15300 exhibits 480 mOhm maximum resistance compared to 350 mOhm typical for the CMT2-1-R. This 130 mOhm increase affects power dissipation and thermal performance in current-limited applications.

2. Operating Temperature Range: The SS35V-15300 operates from -25°C to 120°C, compared to -40°C to 125°C for the CMT2-1-R. Applications requiring full -40°C operation or sustained 125°C performance must account for this reduced range.

3. Pin Configuration: The SS35V-15300 uses a 6-pin vertical package versus the 4-pin configuration of the CMT2-1-R. PCB layout modifications are required for physical accommodation.

4. Inductance Measurement Frequency: Inductance is specified at 1 kHz for the SS35V-15300 and 10 kHz for the CMT2-1-R. Frequency-dependent inductance variation must be considered for applications with specific frequency-dependent filtering requirements.

5. AC Voltage Rating: The SS35V-15300 includes a 250V AC rating specification absent from the CMT2-1-R documentation.

Frequently Asked Questions (FAQ)

Q: Can the SS35V-15300 directly replace the CMT2-1-R without PCB modification?

A: Physical substitution requires PCB layout changes. The SS35V-15300 uses a 6-pin vertical package compared to the CMT2-1-R's 4-pin configuration. Footprint redesign is necessary. Dimensional differences (height: 41.00mm vs. 44.50mm) may affect board clearance.

Q: How does the higher DC resistance of the SS35V-15300 affect circuit performance?

A: The SS35V-15300 exhibits 480 mOhm maximum resistance versus 350 mOhm typical for the CMT2-1-R. At 1.5A continuous current, this represents an additional 195 mW power dissipation. Thermal analysis is required for applications operating at maximum current ratings.

Q: Are there temperature range limitations when substituting the SS35V-15300?

A: The SS35V-15300 operates from -25°C to 120°C, compared to -40°C to 125°C for the CMT2-1-R. Applications requiring operation below -25°C or above 120°C cannot use the SS35V-15300 as a substitute.

Q: What is the significance of the different inductance measurement frequencies?

A: The CMT2-1-R specifies 30 mH @ 10 kHz while the SS35V-15300 specifies 30 mH @ 1 kHz. Common mode chokes exhibit frequency-dependent inductance characteristics. Applications with specific frequency-dependent filtering requirements must evaluate inductance performance across the operating frequency range.

Q: Does the SS35V-15300 meet current regulatory compliance requirements?

A: The SS35V-15300 carries ROHS3 compliance certification and REACH unaffected status. The CMT2-1-R compliance status is not specified in available documentation. For applications subject to ROHS3 or REACH requirements, the SS35V-15300 provides documented compliance.

Q: What is the impact of the 250V AC rating on the SS35V-15300?

A: The SS35V-15300 includes a 250V AC voltage rating specification. The CMT2-1-R voltage rating is not specified. For applications operating at AC voltages, the SS35V-15300 provides explicit voltage rating documentation.

Q: Is the SS35V-15300 suitable for new product designs?

A: The SS35V-15300 maintains active product status with confirmed ongoing availability. The CMT2-1-R is obsolete. New designs should incorporate the SS35V-15300 to ensure long-term component availability and manufacturing support.