CM9900-156 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CM9900-156 is a 15 mH common mode choke (CMC) designed for two-line filtering applications in through-hole configurations. This component operates at 1 kHz with a maximum current rating of 270 mA and a DC resistance of 2.24 Ohm. The part is currently active in production and available in bulk packaging with 769 pieces in stock.

Equivalent and substitute parts are identified when components share compatible electrical and mechanical parameters within the allowed specifications for this product category. Substitutes enable design flexibility, support supply chain continuity, and provide alternative sourcing options when the primary part becomes unavailable.

Substiute Parts

CM9900-156

API Delevan Inc.In Stock: 854CM9900-156 Datasheet

Current PartRFQ

CM9900R-126

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CM9900-156 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Number of Lines: 2 (must match exactly)
• Current Rating (Max): 270 mA (must match exactly)
• Mounting Type: Through Hole (must match exactly)
• Package / Case: Vertical, 4 PC Pin (must match exactly)
• Physical Dimensions: 0.839" L x 0.740" W x 0.669" H maximum (must match exactly)
• Operating Temperature Range: -55°C ~ 125°C (must match exactly)

Allowable Variation Parameters:

• Inductance @ Frequency: Variation permitted within application tolerance
• DC Resistance (DCR): Variation permitted within application tolerance

The CM9900R-126 qualifies as a parametric equivalent because it maintains identical values for all mandatory compatibility parameters while offering different inductance (12 mH versus 15 mH) and DC resistance (1.98 Ohm versus 2.24 Ohm) specifications.

Parameter Comparison

Engineering Selection Recommendations

CM9900-156 Selection Criteria:

• Primary choice when 15 mH inductance specification is required
• Suitable for applications requiring RoHS non-compliant components
• Current product status is Active with established supply availability

CM9900R-126 Selection Criteria:

• Suitable when 12 mH inductance meets application requirements
• Preferred for designs requiring ROHS3 compliance
• Lower DC resistance (1.98 Ohm) reduces power dissipation compared to CM9900-156
• Current product status is Active with higher inventory availability (1001 pieces)
• Both parts share identical mechanical footprint and pin configuration, enabling direct board-level substitution

Both parts maintain identical operating temperature ranges, current ratings, and physical dimensions, ensuring compatibility within the same circuit board layout.

Frequently Asked Questions (FAQ)

Q: Can CM9900R-126 replace CM9900-156 in existing designs?

A: Direct substitution is mechanically and electrically feasible only if the application tolerates the inductance difference (12 mH versus 15 mH) and the lower DC resistance (1.98 Ohm versus 2.24 Ohm). Both components share identical pin configuration, mounting type, and physical dimensions.

Q: What is the primary difference between these two parts?

A: The CM9900-156 provides 15 mH inductance with 2.24 Ohm DCR, while the CM9900R-126 provides 12 mH inductance with 1.98 Ohm DCR. The CM9900R-126 also offers ROHS3 compliance, whereas the CM9900-156 is RoHS non-compliant.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.839" L x 0.740" W (21.30 mm x 18.80 mm) with a maximum height of 0.669" (17.00 mm). Both use Vertical, 4 PC Pin packaging for through-hole mounting.

Q: Do both parts support the same current rating?

A: Yes. Both CM9900-156 and CM9900R-126 are rated for a maximum current of 270 mA.

Q: What is the operating temperature range for both parts?

A: Both parts operate across the temperature range of -55°C to 125°C.

Q: Which part should be selected for new designs?

A: Selection depends on inductance requirements and compliance specifications. If ROHS3 compliance is required, CM9900R-126 is the appropriate choice. If 15 mH inductance is mandatory, CM9900-156 must be used.