CM1011-255 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CM1011-255 is a 2.5 mH common mode choke (CMC) designed for two-line filtering applications in through-hole configurations. Manufactured by API Delevan Inc., this component operates across a temperature range of -55°C to 125°C with a maximum current rating of 2.8A and DC resistance of 73mOhm. The part is currently in active production status with 1005 units available in inventory.

Substitute parts become necessary when the original specification is unavailable, when design revisions require RoHS compliance, or when alternative sourcing is required to meet supply chain objectives while maintaining identical electrical and mechanical performance.

Substiute Parts

CM1011-255

API Delevan Inc.In Stock: 1096CM1011-255 Datasheet

Current PartRFQ

CM1011R-255

API Delevan Inc.In Stock: 1751CM1011R-255 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CM1011-255 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Inductance value: 2.5 mH @ 1 kHz
• Current rating: 2.8A maximum
• DC resistance: 73mOhm maximum
• Number of lines: 2-line configuration

Mechanical Parameters:

• Mounting type: Through Hole
• Package configuration: Horizontal, 4 PC Pin
• Physical dimensions: 1.098" L x 1.098" W (27.90mm x 27.90mm)
• Maximum height: 0.731" (18.56mm)

Environmental Parameters:

• Operating temperature range: -55°C ~ 125°C

The CM1011R-255 meets all specified electrical and mechanical parameters, providing direct functional equivalence. The primary distinction between the main part and its substitute relates to regulatory compliance status rather than performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

CM1011-255 Selection Criteria:

• Applications where RoHS non-compliant components are acceptable
• Legacy designs with established qualification history
• Current inventory availability: 1005 units

CM1011R-255 Selection Criteria:

• Designs requiring ROHS3 compliance
• New product development with regulatory compliance mandates
• Enhanced inventory availability: 1734 units
• Long-term supply chain stability for RoHS-compliant sourcing

Both parts maintain identical electrical performance, thermal characteristics, and mechanical compatibility. Selection between CM1011-255 and CM1011R-255 is determined by regulatory compliance requirements and inventory availability rather than functional performance differences.

Frequently Asked Questions (FAQ)

Q: Can CM1011R-255 be used as a direct replacement for CM1011-255?

A: Yes. The CM1011R-255 provides complete electrical and mechanical equivalence. All critical parameters including inductance, current rating, DC resistance, operating temperature range, and physical dimensions are identical. The primary difference is RoHS compliance status.

Q: What is the difference between CM1011-255 and CM1011R-255?

A: The CM1011R-255 is ROHS3 compliant, while the CM1011-255 is RoHS non-compliant. All electrical specifications, mechanical dimensions, and performance characteristics are identical between the two parts.

Q: Are the physical dimensions identical between both parts?

A: Yes. Both parts share identical dimensions: 1.098" L x 1.098" W (27.90mm x 27.90mm) with a maximum height of 0.731" (18.56mm). Both use horizontal, 4 PC pin through-hole packaging.

Q: Do both parts operate across the same temperature range?

A: Yes. Both CM1011-255 and CM1011R-255 operate across the identical temperature range of -55°C to 125°C.

Q: Which part should be selected for new designs?

A: CM1011R-255 is recommended for new designs due to ROHS3 compliance, which aligns with current regulatory requirements and ensures long-term design viability.

Q: Are there any performance differences in inductance or current handling?

A: No. Both parts deliver 2.5 mH inductance at 1 kHz, support 2.8A maximum current, and maintain 73mOhm maximum DC resistance.