CMF-0330 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMF-0330 is a 33 mH common mode choke manufactured by Tamura, designed for two-line filtering applications in power line environments. This component features a through-hole mounting configuration with a 200 mA current rating and 5.4 Ohm DC resistance. The CMF-0330 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

CMF-0330

TamuraIn Stock: 1089CMF-0330 Datasheet

Current PartRFQ

UU10LFNP-B333

Sumida America Components Inc.In Stock: 932UU10LFNP-B333 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMF-0330 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 33 mH @ 1 kHz
• Number of lines: 2-line configuration
• Current rating: 200 mA maximum
• Mounting type: Through hole
• Package configuration: Vertical, 4 PC pin

Allowable Variation Parameters:

• DC Resistance (DCR): Maximum 5.74 Ohm (tolerance band permits variation from 5.4 Ohm to 5.74 Ohm)
• Physical dimensions: Minor variations acceptable within standard PCB footprint compatibility
• AC voltage rating: Substitute may differ if equal to or exceeding 250 V
• RoHS compliance status: Substitute may exceed compliance level of original part

The UU10LFNP-B333 manufactured by Sumida America Components Inc. meets all mandatory matching parameters and falls within allowable variation ranges for DC resistance and physical dimensions.

Parameter Comparison

Engineering Selection Recommendations

The UU10LFNP-B333 is a direct functional equivalent for the obsolete CMF-0330. Selection of this substitute is supported by the following engineering factors:

Electrical Equivalence: Both components maintain identical inductance values at 1 kHz and support the same 200 mA current rating. The DC resistance variation of 0.34 Ohm (5.4 Ohm to 5.74 Ohm) represents a 6.3% increase and remains within acceptable tolerance bands for common mode choke applications.

Mechanical Compatibility: The UU10LFNP-B333 maintains the same through-hole, vertical 4-pin package configuration. Physical dimension increases (0.039" length, 0.039" width, 0.099" height) are within standard PCB layout tolerances and do not preclude direct substitution in existing designs.

Compliance Status: The UU10LFNP-B333 achieves ROHS3 compliance, providing regulatory advantage over the non-compliant CMF-0330 for new production and long-term supply chain sustainability.

Availability: The UU10LFNP-B333 maintains active product status with 873 units in current inventory, ensuring procurement reliability for the obsolete CMF-0330.

Frequently Asked Questions (FAQ)

Q: Can the UU10LFNP-B333 be used as a direct replacement for the CMF-0330 without circuit modification?

A: Yes. The UU10LFNP-B333 meets all mandatory electrical parameters (33 mH inductance, 200 mA current rating, 2-line configuration) and maintains compatible through-hole packaging. The 0.34 Ohm increase in DC resistance does not require circuit redesign for standard power line filtering applications.

Q: What is the significance of the DC resistance difference between the two parts?

A: The CMF-0330 specifies 5.4 Ohm maximum DCR, while the UU10LFNP-B333 specifies 5.74 Ohm maximum DCR. This 6.3% variation is typical within common mode choke manufacturing tolerances and does not affect filtering performance or thermal characteristics in 200 mA applications.

Q: Are there physical dimension concerns when substituting the UU10LFNP-B333?

A: The UU10LFNP-B333 is slightly larger in all dimensions (length +0.039", width +0.039", height +0.099"). These increases remain within standard PCB layout clearances. Verify available board space and component clearance before final design confirmation.

Q: Does the RoHS3 compliance of the UU10LFNP-B333 affect compatibility?

A: No. RoHS3 compliance of the substitute part represents an upgrade from the non-compliant CMF-0330. This improves regulatory compliance for new production and does not introduce compatibility issues.

Q: What is the packaging difference between the two parts?

A: The CMF-0330 is supplied in bulk packaging, while the UU10LFNP-B333 is also supplied in bulk packaging. Both maintain identical through-hole, vertical 4-pin package configurations suitable for standard PCB assembly processes.