CMT4-1-R Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMT4-1-R is a 5.4 mH, 2-line common mode choke manufactured by Eaton - Electronics Division, designed for power line filtering applications in through-hole mounting configurations. This component operates at a maximum current rating of 2A with a typical DC resistance of 120mOhm and functions across an operating temperature range of -40°C to 125°C.

The CMT4-1-R has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

CMT4-1-R

Eaton - Electronics DivisionIn Stock: 1087CMT4-1-R Datasheet

Current PartRFQ

8106-RC

Bourns Inc.In Stock: 18138106-RC Datasheet

SimilarRFQ

SS30V-300054

KEMETIn Stock: 1276SS30V-300054 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMT4-1-R common mode choke are identified based on strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Number of Lines: 2 (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• Package / Case: Vertical, 4 PC Pin (mandatory match)
• Inductance Range: 5.0 mH to 5.4 mH (functional equivalence)
• Current Rating: Equal to or greater than 2A (design compatibility)
• DC Resistance: Within acceptable operating parameters
• Operating Temperature Range: Compatibility with application requirements

Secondary Considerations:

• Product Status: Active status preferred for ongoing availability
• Moisture Sensitivity Level: MSL 1 acceptable
• ECCN Classification: EAR99 maintained across substitutes

Two substitute parts meet these criteria and are listed in the CMT4-1-R substitution field.

Parameter Comparison

Engineering Selection Recommendations

8106-RC (Bourns Inc.) - Primary Substitute

The 8106-RC is an active product with current manufacturing support. It meets all mandatory substitution criteria: 2-line configuration, through-hole mounting, vertical 4-pin package, and 5 mH inductance within functional range. The current rating of 3.7A exceeds the CMT4-1-R requirement of 2A, providing design margin. DC resistance of 70mOhm is lower than the CMT4-1-R specification, resulting in reduced power dissipation. Operating temperature range of -55°C to 105°C covers the lower end of the CMT4-1-R range but does not extend to the upper 125°C limit. Physical dimensions are larger, requiring PCB layout verification.

SS30V-300054 (KEMET) - Secondary Substitute

The SS30V-300054 is an active product with current manufacturing support. It matches all mandatory substitution criteria and maintains identical inductance of 5.4 mH and DC resistance of 120mOhm to the CMT4-1-R. Current rating of 3A exceeds the 2A requirement. Operating temperature range of -25°C to 120°C does not extend to the lower -40°C limit of the CMT4-1-R. AC voltage rating of 250V is specified. Physical dimensions are larger, requiring PCB layout verification. RoHS3 compliance and REACH unaffected status are documented.

Selection Basis:

Both substitute parts are active products with documented availability, addressing the obsolescence of the CMT4-1-R. Selection between 8106-RC and SS30V-300054 depends on specific application requirements regarding operating temperature extremes and physical space constraints on the PCB.

Frequently Asked Questions (FAQ)

Q: Can the 8106-RC or SS30V-300054 be used as direct replacements for the CMT4-1-R?

A: Both parts meet the core functional and mechanical requirements for substitution: 2-line common mode choke configuration, through-hole mounting, vertical 4-pin package, and inductance values within the 5.0-5.4 mH range. However, physical dimensions differ. The 8106-RC measures 1.200" L x 0.600" W x 1.200" H, and the SS30V-300054 measures 1.220" L x 0.886" W x 1.299" H, compared to the CMT4-1-R at 0.984" L x 0.606" W x 1.004" H. PCB layout verification is required to confirm fit within available space.

Q: What are the key differences in current rating between the CMT4-1-R and its substitutes?

A: The CMT4-1-R is rated for 2A maximum current. The 8106-RC is rated for 3.7A, and the SS30V-300054 is rated for 3A. Both substitutes exceed the original specification, providing additional design margin for current handling capacity.

Q: How do the DC resistance values compare?

A: The CMT4-1-R specifies 120mOhm typical DC resistance. The 8106-RC has 70mOhm DC resistance, resulting in lower power dissipation. The SS30V-300054 maintains 120mOhm DC resistance, matching the original specification exactly.

Q: Are there operating temperature limitations with the substitute parts?

A: The CMT4-1-R operates from -40°C to 125°C. The 8106-RC operates from -55°C to 105°C, which does not reach the upper 125°C limit. The SS30V-300054 operates from -25°C to 120°C, which does not reach the lower -40°C limit. Application requirements must be evaluated against these ranges.

Q: What is the inductance measurement frequency for each part?

A: The CMT4-1-R specifies 5.4 mH @ 10 kHz. The 8106-RC specifies 5 mH @ 1 kHz. The SS30V-300054 specifies 5.4 mH @ 1 kHz. Inductance values vary with frequency; these measurements are taken at different reference frequencies.

Q: Are both substitute parts RoHS compliant?

A: The 8106-RC RoHS status is not specified in the provided data. The SS30V-300054 is RoHS3 compliant. Compliance verification is required for the 8106-RC if RoHS compliance is a design requirement.

Q: What packaging is available for these substitute parts?

A: The CMT4-1-R is available in bulk packaging. The 8106-RC is available in bulk packaging. The SS30V-300054 is available in bulk packaging. All three parts use vertical, 4-pin package configuration.