CM9900-124 Equivalent & Substitute Parts

Part Overview

The CM9900-124 is a 120 µH common mode choke (CMC) designed for two-line filtering applications in through-hole configurations. This component is rated for 2.8A maximum current with a DC resistance of 28mOhm and operates across the temperature range of -55°C to 125°C. The part is currently active in production and available in bulk packaging with 671 pieces in stock. Substitute parts are identified when design requirements allow for alternative inductance values while maintaining compatibility with the same mechanical footprint, current rating, and mounting configuration.

Substiute Parts

CM9900-124

API Delevan Inc.In Stock: 778CM9900-124 Datasheet

Current PartRFQ

CM9900-104

API Delevan Inc.In Stock: 1315CM9900-104 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The CM9900-124 belongs to the CM9900 series of common mode chokes with the following critical substitution parameters:

• Mechanical Compatibility: Identical footprint (0.839" L x 0.740" W, 17.00mm height), vertical 4-pin configuration, and through-hole mounting
• Electrical Performance: Same current rating (2.8A maximum), two-line configuration, and operating temperature range (-55°C ~ 125°C)
• Inductance Tolerance: Substitute parts must maintain the same inductance measurement frequency (1 kHz) with allowable variation in inductance value
• DC Resistance: Substitute parts may have lower DC resistance values while maintaining the same or lower maximum specification

The CM9900-104 qualifies as a parametric equivalent based on these criteria, with the primary difference being a reduced inductance value (100 µH versus 120 µH) and correspondingly lower DC resistance (25mOhm versus 28mOhm).

Parameter Comparison

Engineering Selection Recommendations

Both the CM9900-124 and CM9900-104 maintain active product status with identical compliance profiles. The CM9900-104 offers improved DC resistance characteristics (25mOhm versus 28mOhm) while maintaining the same current rating and mechanical compatibility. Selection between these parts depends on the specific inductance requirement of the application circuit. The CM9900-104 is currently available in higher inventory (1243 pieces) compared to the CM9900-124 (671 pieces). Both parts carry identical RoHS non-compliant and REACH Unaffected designations, requiring equivalent compliance consideration in system design.

Frequently Asked Questions (FAQ)

Q: Can the CM9900-104 be used as a direct replacement for the CM9900-124?

A: The CM9900-104 is mechanically and electrically compatible in terms of mounting, current rating, and temperature range. The primary difference is inductance value (100 µH versus 120 µH). Substitution is valid only if the circuit design tolerates the lower inductance specification.

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

A: The CM9900-124 provides 120 µH inductance with 28mOhm DC resistance, while the CM9900-104 provides 100 µH inductance with 25mOhm DC resistance. Both share identical mechanical dimensions, current ratings, and operating temperature ranges.

Q: Are there any compliance differences between the CM9900-124 and CM9900-104?

A: No. Both parts carry identical RoHS non-compliant and REACH Unaffected designations. Compliance considerations are equivalent for both parts.

Q: What is the significance of the inductance difference?

A: Inductance value directly affects the filtering performance of the common mode choke. The 20 µH difference between these parts will impact attenuation characteristics at specific frequencies. Circuit design requirements determine which inductance value is appropriate.

Q: Are both parts available in the same packaging?

A: Yes. Both the CM9900-124 and CM9900-104 are supplied in bulk packaging with vertical, 4-pin through-hole configuration and identical physical dimensions.