CMF-6056 Equivalent & Substitute Parts Reference

Part Overview

The CMF-6056 is a 2-line common mode choke manufactured by Tamura, rated for 5.6 mH inductance at 1 kHz with a maximum current rating of 1A and DC resistance of 300 mOhm. This component is designed for electromagnetic interference (EMI) suppression in power line applications.

The CMF-6056 carries an obsolete product status. Identifying equivalent 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

CMF-6056

TamuraIn Stock: 757CMF-6056 Datasheet

Current PartRFQ

ALFT-03A-8

Abracon LLCIn Stock: 1237ALFT-03A-8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMF-6056 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value within acceptable tolerance: 5.5–5.6 mH @ 1 kHz
• Number of lines: 2-line configuration
• Current rating: 1A minimum
• Package configuration: Vertical, 4-pin through-hole or surface-mount equivalent
• Moisture sensitivity: MSL 1 or better

Secondary Compatibility Factors:

• DC resistance: Substitute parts with DCR ≤ 750 mOhm are acceptable (higher DCR increases power dissipation but maintains functional EMI suppression)
• Voltage rating: AC or DC voltage rating ≥ 250V
• Physical dimensions: Footprint compatibility with PCB layout constraints

The ALFT-03A-8 from Abracon LLC meets these substitution criteria with inductance of 5.5 mH @ 1 kHz, 1A current rating, 2-line configuration, and identical pin configuration.

Parameter Comparison

Engineering Selection Recommendations

ALFT-03A-8 Suitability:

The ALFT-03A-8 is a direct functional substitute for the CMF-6056 based on the following engineering factors:

1. Electrical Equivalence: Inductance values differ by 1.8% (5.5 mH vs. 5.6 mH), which is within acceptable tolerance for common mode choke applications. Both components maintain 1A current rating and 2-line configuration.

2. Product Status Advantage: The ALFT-03A-8 is in active production status, ensuring long-term availability and supply chain stability compared to the obsolete CMF-6056.

3. Compliance and Certification: The ALFT-03A-8 carries RoHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. Both components are MSL 1 rated.

4. Physical Compatibility: Both parts use identical 4-pin vertical through-hole package configuration. The ALFT-03A-8 has a slightly smaller height (21.60 mm vs. 28.00 mm), which may provide PCB layout advantages.

5. DC Resistance Trade-off: The ALFT-03A-8 exhibits higher DCR (750 mOhm vs. 300 mOhm). In applications where thermal dissipation is critical, this parameter must be evaluated against the specific circuit design. For standard EMI suppression applications, this difference is operationally acceptable.

Frequently Asked Questions (FAQ)

Q: Can the ALFT-03A-8 be used as a direct replacement for the CMF-6056 without circuit modification?

A: Yes, for standard common mode choke applications. Both components share identical electrical ratings (1A, 2-line, ~5.5–5.6 mH), pin configuration, and package type. However, the higher DCR of the ALFT-03A-8 (750 mOhm vs. 300 mOhm) will increase power dissipation. Verify thermal performance in your specific circuit design.

Q: What is the inductance tolerance difference between these parts?

A: The CMF-6056 specifies 5.6 mH and the ALFT-03A-8 specifies 5.5 mH at 1 kHz. This 1.8% variance is typical for common mode choke manufacturing and does not affect EMI suppression performance in standard applications.

Q: Are there physical mounting differences?

A: Both parts use vertical 4-pin through-hole mounting. The ALFT-03A-8 is 6.4 mm shorter in height (21.60 mm vs. 28.00 mm) and 1.4 mm longer in length (23.90 mm vs. 22.50 mm). Verify PCB layout compatibility before substitution.

Q: Does the ALFT-03A-8 meet current regulatory standards?

A: Yes. The ALFT-03A-8 is RoHS3 compliant and REACH unaffected, meeting current environmental and safety regulations. The obsolete CMF-6056 may not meet modern compliance requirements for new designs.

Q: What is the impact of higher DC resistance on circuit performance?

A: Higher DCR increases resistive power loss (P = I²R). At 1A, the ALFT-03A-8 dissipates 0.75W compared to 0.3W for the CMF-6056. For low-frequency or continuous-operation circuits, thermal management must be evaluated. For transient or intermittent applications, the difference is negligible.

Q: Can I use the ALFT-03A-8 in high-temperature environments?

A: The ALFT-03A-8 is rated for –25°C to +85°C operation. The CMF-6056 operating temperature range is not specified in available documentation. Verify your application's temperature requirements against the ALFT-03A-8 specification.