CM9900R-186 Equivalent & Substitute Parts

Part Overview

The CM9900R-186 is a 2-line common mode choke (CMC) designed for through-hole mounting applications. This component provides 18 mH inductance at 1 kHz with a maximum current rating of 270 mA and a DC resistance of 2.45 Ohm. The part is manufactured by API Delevan Inc. and maintains Active product status. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit applications while maintaining functional performance and compliance requirements.

Substiute Parts

CM9900R-186

API Delevan Inc.In Stock: 997CM9900R-186 Datasheet

Current PartRFQ

CM9900R-126

API Delevan Inc.In Stock: 1105CM9900R-126 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CM9900R-186 are identified based on the following critical parameters that determine functional equivalence:

Mechanical Compatibility Parameters:

• Mounting Type: Through Hole
• Package / Case: Vertical, 4 PC Pin
• Physical Dimensions: 0.839" L x 0.740" W (21.30 mm x 18.80 mm)
• Height (Max): 0.669" (17.00 mm)

Electrical Compatibility Parameters:

• Number of Lines: 2 (Common Mode Choke configuration)
• Current Rating (Max): 270 mA
• Operating Temperature Range: -55°C ~ 125°C

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• Product Status: Active

The CM9900R-126 qualifies as a parametric equivalent substitute because it maintains identical mechanical form factor, identical current rating, identical operating temperature range, identical compliance certifications, and identical mounting configuration. The inductance value differs (12 mH versus 18 mH), which represents a lower inductance specification within the same product family and physical envelope.

Parameter Comparison

Engineering Selection Recommendations

Both CM9900R-186 and CM9900R-126 maintain Active product status from API Delevan Inc., ensuring continued availability and manufacturing support. Both parts are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic component procurement.

The selection between these parts depends on circuit inductance requirements. The CM9900R-186 provides 18 mH inductance, while the CM9900R-126 provides 12 mH inductance. Both share identical current handling capacity (270 mA), identical physical form factor, and identical thermal operating range (-55°C ~ 125°C).

The CM9900R-126 exhibits lower DC resistance (1.98 Ohm versus 2.45 Ohm), resulting in reduced power dissipation in applications where this parameter is critical. The mechanical and electrical compatibility of both parts within the same series and package configuration allows substitution based on specific inductance value requirements of the application circuit.

Frequently Asked Questions (FAQ)

Q: Can CM9900R-126 be used as a direct replacement for CM9900R-186?

A: CM9900R-126 can be used as a substitute when the circuit application permits operation with 12 mH inductance instead of 18 mH. Both parts share identical current rating (270 mA), identical mounting type (Through Hole), identical physical dimensions, and identical operating temperature range (-55°C ~ 125°C). The substitution is mechanically and electrically compatible at the package level. Circuit-level compatibility depends on whether the lower inductance value meets application requirements.

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

A: The primary differences are inductance value (18 mH for CM9900R-186 versus 12 mH for CM9900R-126) and DC resistance (2.45 Ohm versus 1.98 Ohm). All other parameters including current rating, mounting configuration, physical dimensions, temperature range, and compliance certifications are identical.

Q: Are both parts available in the same package configuration?

A: Yes. Both CM9900R-186 and CM9900R-126 use identical packaging: Vertical, 4 PC Pin through-hole configuration with dimensions of 0.839" L x 0.740" W (21.30 mm x 18.80 mm) and maximum height of 0.669" (17.00 mm).

Q: Do both parts meet the same compliance requirements?

A: Yes. Both parts are ROHS3 Compliant and REACH Unaffected. Both maintain Active product status from API Delevan Inc.

Q: What is the impact of different DC resistance values?

A: The CM9900R-126 has lower DC resistance (1.98 Ohm) compared to CM9900R-186 (2.45 Ohm). Lower DC resistance results in reduced power dissipation and heat generation during operation at the same current levels. This difference may be relevant in applications with thermal constraints or high-frequency switching conditions.

Q: Can these parts be used interchangeably in PCB designs?

A: Both parts use identical through-hole pin configurations and physical dimensions, allowing direct PCB footprint compatibility. Circuit-level interchangeability depends on whether the application circuit can function with the different inductance values (18 mH versus 12 mH) specified for each part.