CM9900R-154 Equivalent & Substitute Parts

Part Overview

The CM9900R-154 is a 2-line common mode choke (CMC) designed for through-hole mounting applications. This component provides 150 µH inductance at 1 kHz with a maximum current rating of 2.8A and 30mOhm DC resistance. The part is currently active in production and maintains RoHS3 compliance. Substitute parts may be required due to inventory constraints, design revisions, or application-specific parameter adjustments while maintaining functional compatibility within the CM9900 series.

Substiute Parts

CM9900R-154

API Delevan Inc.In Stock: 793CM9900R-154 Datasheet

Current PartRFQ

CM9900-104

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the CM9900 series is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Number of Lines: 2 (fixed requirement)
• Mounting Type: Through Hole (fixed requirement)
• Package / Case: Vertical, 4 PC Pin (fixed requirement)
• Operating Temperature Range: -55°C ~ 125°C (fixed requirement)
• Size / Dimension: 0.839" L x 0.740" W (21.30mm x 18.80mm) (fixed requirement)
• Height (Max): 0.669" (17.00mm) (fixed requirement)

Variable Parameters Defining Substitution:

• Inductance @ Frequency (150 µH vs. 100 µH)
• DC Resistance (30mOhm vs. 25mOhm)
• Current Rating (2.8A - consistent across series)
• RoHS Compliance Status

The CM9900-104 qualifies as a parametric equivalent within the CM9900 series due to identical mechanical form factor, pin configuration, thermal range, and current rating. The primary differences are reduced inductance (100 µH vs. 150 µH) and lower DC resistance (25mOhm vs. 30mOhm).

Parameter Comparison

Engineering Selection Recommendations

CM9900R-154 (Primary Selection):

• Maintains RoHS3 compliance for regulated applications
• Specified inductance of 150 µH at 1 kHz
• Higher DC resistance (30mOhm) suitable for applications requiring specific impedance characteristics
• Recommended for new designs and applications with RoHS compliance requirements

CM9900-104 (Substitute Selection):

• Lower inductance value (100 µH) requires circuit-level validation
• Reduced DC resistance (25mOhm) results in lower power dissipation
• RoHS non-compliant status restricts use in regulated markets
• Suitable only for applications where RoHS compliance is not mandated and lower inductance is acceptable
• Both parts share identical mechanical footprint, pin configuration, and thermal operating range, enabling direct PCB compatibility

Selection between these parts must be based on specific inductance requirements and regulatory compliance obligations of the target application.

Frequently Asked Questions (FAQ)

Q: Can CM9900-104 be used as a direct replacement for CM9900R-154?

A: Direct replacement is not recommended without circuit validation. While both parts share identical mechanical form factor, pin configuration, and current rating, the CM9900-104 provides 100 µH inductance compared to the CM9900R-154's 150 µH. This 33% inductance reduction will alter circuit performance. Additionally, CM9900-104 is RoHS non-compliant, which may violate application requirements.

Q: What are the key compatibility parameters between these parts?

A: Compatibility is ensured by: 2-line configuration, through-hole mounting, vertical 4-pin package, identical physical dimensions (0.839" L x 0.740" W x 0.669" H), -55°C to 125°C operating temperature range, and 2.8A current rating. These parameters are fixed across both parts.

Q: How does the inductance difference affect circuit performance?

A: The CM9900-104's 100 µH inductance is 50 µH lower than the CM9900R-154's 150 µH specification. This affects common mode filtering effectiveness, impedance characteristics, and frequency response. Circuit-level analysis is required to determine if this reduction is acceptable for the intended application.

Q: What is the significance of the DC resistance difference?

A: The CM9900-104 has 25mOhm DCR versus the CM9900R-154's 30mOhm. Lower resistance reduces power dissipation and heat generation but may affect impedance matching in specific circuit designs. The 5mOhm difference is approximately 17% lower resistance.

Q: Are there any compliance considerations when selecting between these parts?

A: Yes. The CM9900R-154 is RoHS3 compliant, meeting regulatory requirements for restricted substances in electrical and electronic equipment. The CM9900-104 is RoHS non-compliant and cannot be used in applications subject to RoHS regulations. Verify compliance requirements before selection.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes, from a mechanical and electrical interface perspective. Both parts use identical through-hole pin configuration and physical dimensions, allowing direct PCB compatibility. However, circuit performance differences due to inductance variation must be validated before implementation.