CMF-2100 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMF-2100 is a 2-line common mode choke manufactured by Tamura, rated for 10 mH inductance at 1 kHz with a maximum current capacity of 2.2A and DC resistance of 300 mOhm. This component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent substitute parts with compatible electrical and mechanical specifications is essential for system redesign, production continuity, and component procurement planning.

Substiute Parts

CMF-2100

TamuraIn Stock: 1241CMF-2100 Datasheet

Current PartRFQ

8104-RC

Bourns Inc.In Stock: 12148104-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMF-2100 are identified based on strict alignment with the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Number of Lines: 2 (mandatory match)
• Inductance @ Frequency: 10 mH @ 1 kHz (mandatory match)
• Current Rating (Max): Equal to or greater than 2.2A
• DC Resistance (DCR) (Max): Equal to or less than 300 mOhm
• Voltage Rating - AC: Equal to or greater than 250V (where specified)

Mechanical Compatibility Criteria:

• Package / Case: Vertical, 4 PC Pin (mandatory match)
• Mounting Type: Through Hole or equivalent pin configuration
• Physical dimensions: Compatible with PCB layout constraints

The Bourns 8104-RC meets these substitution criteria with equivalent inductance and line configuration, improved current rating (2.4A vs. 2.2A), and superior DC resistance performance (170 mOhm vs. 300 mOhm).

Parameter Comparison

Engineering Selection Recommendations

For CMF-2100 Replacement:

The Bourns 8104-RC is a qualified substitute for the obsolete Tamura CMF-2100. Selection is based on the following engineering factors:

1. Electrical Equivalence: Both components provide identical inductance (10 mH @ 1 kHz) and 2-line configuration. The 8104-RC exceeds electrical requirements with higher current rating (2.4A vs. 2.2A) and lower DC resistance (170 mOhm vs. 300 mOhm), resulting in improved thermal performance and reduced power dissipation.

2. Product Status: The CMF-2100 is obsolete, making the active-status 8104-RC the appropriate long-term solution for production continuity and future procurement.

3. Compliance Alignment: Both components share identical ECCN classification (EAR99) and MSL rating (1 - Unlimited). The 8104-RC provides additional compliance documentation with ROHS3 certification and REACH unaffected status.

4. Physical Compatibility: Both components use vertical 4-pin through-hole mounting. The 8104-RC features a smaller footprint (30.48mm x 15.24mm vs. 38.50mm x 21.00mm) and lower profile (30.48mm vs. 33.50mm), which may provide PCB layout advantages in space-constrained applications.

5. Inventory Availability: Both components are currently in stock with comparable inventory levels (1173 pcs CMF-2100 vs. 1176 pcs 8104-RC).

Frequently Asked Questions (FAQ)

Q: Can the Bourns 8104-RC directly replace the Tamura CMF-2100 in existing designs?

A: Yes. Both components share identical electrical specifications (10 mH @ 1 kHz, 2-line configuration) and mechanical package (vertical 4-pin through-hole). The 8104-RC meets or exceeds all electrical requirements of the CMF-2100. PCB layout verification is recommended due to dimensional differences (the 8104-RC is smaller).

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (Tamura vs. Bourns), product status (obsolete vs. active), and performance characteristics. The 8104-RC provides superior current handling (2.4A vs. 2.2A), lower DC resistance (170 mOhm vs. 300 mOhm), and a smaller physical footprint. The CMF-2100 has a larger form factor (38.50mm x 21.00mm vs. 30.48mm x 15.24mm).

Q: Are there any compliance or certification differences?

A: Both components share EAR99 export classification and MSL-1 moisture sensitivity rating. The 8104-RC provides additional certifications: ROHS3 compliance and REACH unaffected status. The CMF-2100 does not specify these certifications in available documentation.

Q: Does the smaller size of the 8104-RC affect performance?

A: No. The 8104-RC maintains identical inductance and electrical performance despite its smaller physical dimensions. The reduced size results from improved design efficiency and does not compromise functional specifications.

Q: What is the operating temperature range for each component?

A: The CMF-2100 operating temperature is not specified in available documentation. The 8104-RC operates across -55°C to 105°C, providing a defined thermal operating window for system design.

Q: Are both components available in the same packaging format?

A: Yes. Both components use vertical 4-pin through-hole packaging. The 8104-RC is available in bulk packaging, while the CMF-2100 packaging format is not specified.

Q: Which component should be selected for new designs?

A: The Bourns 8104-RC is the appropriate selection for new designs. The CMF-2100 is obsolete and represents a legacy component. The 8104-RC provides active product status, superior electrical performance, and documented compliance certifications.