CMT-8114-B Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMT-8114-B is a 2-line common mode choke manufactured by Triad Magnetics, designed for power line filtering applications. This through-hole component features a 2.5 mH inductance at 1 kHz with a maximum current rating of 12.5A and 11 mOhm DC resistance. The part is currently active in production and maintains full compliance with international safety and environmental standards including UL, CSA, IEC, and VDE approvals. Substitute parts are identified when inventory constraints, lead time requirements, or application-specific parameter needs necessitate alternative component selection within the same functional category.

Substiute Parts

CMT-8114-B

Triad MagneticsIn Stock: 1180CMT-8114-B Datasheet

Current PartRFQ

CMT-8119-B

Triad MagneticsIn Stock: 976CMT-8119-B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMT-8114-B are identified based on the following criteria established for 2-line common mode choke components in the power line filter category:

Allowed Parameter Variations:

• Inductance: Higher values acceptable (2.5 mH baseline; up to 4 mH permitted)
• Current Rating: Equal or higher ratings acceptable (12.5A baseline; 14.5A acceptable)
• DC Resistance: Marginal increase acceptable (11 mOhm baseline; up to 12 mOhm acceptable)
• Physical Dimensions: Larger footprints acceptable for through-hole mounting
• Voltage Rating: Equal or higher ratings required (1500V minimum maintained)
• Operating Temperature: Range must equal or exceed baseline (-55°C ~ 105°C)

Non-Negotiable Parameters:

• Number of Lines: Must remain 2-line configuration
• Mounting Type: Must remain Through Hole
• Filter Type: Must remain Power Line
• Approval Agencies: Must maintain CSA, IEC, UL, VDE certifications
• RoHS Status: Must maintain ROHS3 Compliance
• Package Configuration: Must remain Vertical, 4 PC Pin

The CMT-8119-B qualifies as a parametric equivalent based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

CMT-8114-B Selection Criteria:

• Applications requiring 2.5 mH inductance at 1 kHz
• Systems with 12.5A maximum current requirements
• Space-constrained PCB layouts (smaller footprint: 36.83mm x 20.32mm)
• Lower DC resistance priority (11 mOhm)

CMT-8119-B Selection Criteria:

• Applications requiring higher inductance filtering (4 mH at 1 kHz)
• Systems with higher current capacity needs (14.5A maximum)
• PCB layouts with available space for larger component footprint (43.18mm x 22.86mm)
• Applications where slightly higher DC resistance (12 mOhm) is acceptable

Both parts maintain identical compliance certifications (CSA, IEC, UL, VDE), identical voltage ratings (1500V AC), identical operating temperature ranges (-55°C ~ 105°C), and identical RoHS3 compliance status. Both parts are currently active in production. Selection between these parts depends on circuit inductance requirements and current handling specifications rather than regulatory or environmental factors.

Frequently Asked Questions (FAQ)

Q: Can CMT-8119-B replace CMT-8114-B in all applications?

A: CMT-8119-B is a parametric equivalent with higher inductance (4 mH vs. 2.5 mH) and higher current rating (14.5A vs. 12.5A). Substitution is valid only when the application circuit can accommodate the higher inductance value. Higher inductance increases filtering effectiveness but may alter circuit frequency response characteristics. Current rating increase does not restrict substitution. Physical dimensions are larger; verify PCB layout compatibility.

Q: What are the key differences between these parts?

A: The primary differences are inductance (2.5 mH vs. 4 mH), current rating (12.5A vs. 14.5A), DC resistance (11 mOhm vs. 12 mOhm), and physical dimensions. All other parameters including voltage rating, operating temperature, mounting type, package configuration, and certifications are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both CMT-8114-B and CMT-8119-B are ROHS3 compliant and REACH unaffected.

Q: Do both parts have the same certifications?

A: Yes. Both parts carry identical approvals from CSA, IEC, UL, and VDE.

Q: What is the impact of higher inductance in CMT-8119-B?

A: Higher inductance (4 mH vs. 2.5 mH) provides increased common mode filtering effectiveness at the cost of potentially altered circuit impedance characteristics. Circuit design validation is necessary to confirm compatibility with the higher inductance value.

Q: Can CMT-8114-B replace CMT-8119-B?

A: CMT-8114-B has lower inductance (2.5 mH vs. 4 mH) and lower current rating (12.5A vs. 14.5A). Reverse substitution is not recommended for applications designed for the CMT-8119-B specifications, as filtering performance would be reduced.

Q: Are the physical dimensions compatible with the same PCB footprint?

A: No. CMT-8119-B is larger (43.18mm x 22.86mm vs. 36.83mm x 20.32mm) and taller (41.91mm vs. 38.10mm). PCB layout verification is required before substitution.

Q: What is the DC resistance difference?

A: CMT-8114-B has 11 mOhm maximum DC resistance; CMT-8119-B has 12 mOhm maximum. This 1 mOhm difference is marginal and typically does not impact circuit performance in power line filtering applications.