CMT-03110 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMT-03110 is a 10 mH common mode choke manufactured by Tamura, designed for two-line power line filtering applications in through-hole configurations. This component features a 1A maximum current rating and 550 mOhm DC resistance, with 250V AC voltage rating suitable for EMI suppression in electronic equipment.

The CMT-03110 is classified as obsolete. 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

CMT-03110

TamuraIn Stock: 1223CMT-03110 Datasheet

Current PartRFQ

SS21V-R110100

KEMETIn Stock: 787SS21V-R110100 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMT-03110 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 10 mH @ 1 kHz
• Number of lines: 2-line configuration
• Mounting type: Through Hole
• Voltage rating: 250V AC minimum
• Pin configuration: 4 PC Pin vertical orientation

Allowable Variation Parameters:

• Current rating: Substitute must equal or exceed 1A
• DC resistance: Substitute may be lower than 550 mOhm (improved performance)
• Physical dimensions: Minor variations acceptable if mounting footprint remains compatible
• Product status: Active status preferred for long-term availability

The SS21V-R110100 manufactured by KEMET meets all mandatory matching criteria and demonstrates improved electrical characteristics within allowable variation limits.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SS21V-R110100 (KEMET)

The SS21V-R110100 is the qualified substitute for the obsolete CMT-03110. Selection is based on the following engineering criteria:

Electrical Equivalence: Both components provide identical inductance (10 mH @ 1 kHz) and voltage rating (250V AC) for two-line common mode filtering. The SS21V-R110100 current rating of 1.1A exceeds the CMT-03110 requirement of 1A, providing design margin. The reduced DC resistance of 450 mOhm versus 550 mOhm results in lower power dissipation and improved thermal performance.

Mechanical Compatibility: Both components utilize through-hole mounting with 4-pin vertical configuration, supporting direct PCB footprint compatibility.

Compliance and Availability: The SS21V-R110100 maintains active product status with ROHS3 compliance and REACH unaffected designation, ensuring long-term supply chain stability and regulatory alignment. The CMT-03110 obsolete status necessitates transition to this active substitute.

Packaging Consideration: The SS21V-R110100 is supplied in Tray packaging (753 pieces in stock) versus the CMT-03110 original packaging format. Verify packaging requirements for your procurement process.

Frequently Asked Questions (FAQ)

Q: Can the SS21V-R110100 directly replace the CMT-03110 without PCB modification?

A: Yes. Both components share identical inductance values, voltage ratings, and through-hole 4-pin vertical mounting configuration. Physical dimensions differ slightly (SS21V-R110100: 20.50mm L × 16.50mm W × 24.50mm H versus CMT-03110: 32.00mm L × 22.00mm W × 32.00mm H), but the pin footprint remains compatible. Verify available PCB space for the substitute component dimensions.

Q: What is the significance of the lower DC resistance in the SS21V-R110100?

A: The SS21V-R110100 DC resistance of 450 mOhm is 100 mOhm lower than the CMT-03110 specification of 550 mOhm. This reduction decreases resistive power loss (I²R heating) at rated current, improving thermal performance and efficiency. This represents an engineering improvement with no negative impact on circuit function.

Q: Is the SS21V-R110100 suitable for applications requiring the CMT-03110 current rating of 1A?

A: Yes. The SS21V-R110100 current rating of 1.1A exceeds the 1A requirement, providing 10% design margin. This higher rating supports the same application without derating.

Q: What compliance differences exist between these components?

A: The CMT-03110 specifies MSL 1 (Unlimited moisture sensitivity). The SS21V-R110100 lists MSL as Not Applicable, indicating no moisture sensitivity restriction. The SS21V-R110100 includes ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The CMT-03110 compliance status is not specified in available documentation.

Q: Are there any operating temperature differences?

A: The CMT-03110 operating temperature range is not specified. The SS21V-R110100 operates across -25°C to 120°C. Verify that this temperature range meets your application requirements.

Q: How does packaging format affect component selection?

A: The CMT-03110 original packaging format is not specified. The SS21V-R110100 is supplied in Tray format with 753 pieces currently in stock. Confirm that Tray packaging is acceptable for your procurement and assembly processes. Reel or tube packaging may require special order.