CMT-02203 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMT-02203 is a 3 mH common mode choke manufactured by Tamura, designed for two-line filtering applications in through-hole configurations. This component features a 2A maximum current rating and 200 mOhm DC resistance, operating at 250V AC. The CMT-02203 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

CMT-02203

TamuraIn Stock: 943CMT-02203 Datasheet

Current PartRFQ

PE-62912NL

Pulse ElectronicsIn Stock: 966PE-62912NL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMT-02203 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Number of Lines: 2
• Inductance @ Frequency: 3 mH @ 1 kHz
• Mounting Type: Through Hole
• Package Configuration: 4 PC Pin vertical orientation

Allowable Parameter Variations:

• Current Rating (Max): Substitute must equal or exceed 2A
• DC Resistance (DCR) (Max): Substitute may be lower than 200 mOhm (improved performance)
• Voltage Rating - AC: Substitute must equal or exceed 250V
• Product Status: Active status preferred for long-term availability

The PE-62912NL from Pulse Electronics meets all mandatory matching criteria and demonstrates improved electrical characteristics with higher current capacity (3.5A) and lower DC resistance (60 mOhm), while maintaining identical inductance and line configuration.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PE-62912NL (Pulse Electronics)

The PE-62912NL is the qualified substitute for the obsolete CMT-02203. Selection is based on the following engineering criteria:

1. Functional Equivalence: Identical inductance (3 mH @ 1 kHz) and line configuration (2-line) ensure direct functional replacement in common mode filtering applications.

2. Enhanced Electrical Performance: The PE-62912NL provides superior current handling (3.5A versus 2A) and significantly reduced DC resistance (60 mOhm versus 200 mOhm), resulting in lower insertion loss and improved thermal characteristics.

3. Product Status: The PE-62912NL maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete CMT-02203.

4. Compliance: The PE-62912NL is RoHS Compliant and REACH Unaffected, meeting modern regulatory requirements.

5. Physical Compatibility: Dimensional variations (approximately 1.2mm in length and 1.5mm in height) are within acceptable tolerances for through-hole PCB applications and do not require board redesign.

6. Packaging: Both components feature identical 4 PC pin vertical configurations with MSL 1 rating, ensuring handling and storage compatibility.

Frequently Asked Questions (FAQ)

Q: Can the PE-62912NL directly replace the CMT-02203 without PCB modification?

A: Yes. Both components feature identical 4 PC pin through-hole configurations with compatible vertical mounting orientations. Dimensional variations are minimal and do not require PCB layout changes.

Q: What is the significance of the lower DC resistance in the PE-62912NL?

A: The PE-62912NL's 60 mOhm DCR compared to the CMT-02203's 200 mOhm DCR results in reduced power dissipation and lower insertion loss. This represents improved performance within the same functional specification.

Q: Is the higher current rating of the PE-62912NL (3.5A) a concern for circuits designed for 2A operation?

A: No. A higher current rating indicates greater thermal and electrical margin. The component will operate safely in applications rated for 2A maximum current.

Q: Are there any voltage rating differences between these components?

A: The CMT-02203 specifies 250V AC rating. The PE-62912NL does not specify an AC voltage rating in the provided data. For applications requiring explicit 250V AC confirmation, this parameter should be verified with the manufacturer.

Q: What is the impact of the 1.2mm length and 1.5mm height difference?

A: These dimensional variations are negligible for standard through-hole PCB applications. Verify clearance in confined board areas, but redesign is not typically required.

Q: Does the RoHS compliance of the PE-62912NL affect compatibility?

A: RoHS compliance indicates adherence to hazardous substance restrictions and represents a regulatory advantage. It does not affect electrical or mechanical compatibility with the CMT-02203 footprint.

Q: Can multiple CMT-02203 units be replaced with a single PE-62912NL?

A: No. Substitution is one-to-one. The PE-62912NL is designed as a direct replacement for individual CMT-02203 components, not as a consolidated solution for multiple units.