CDRR157NP-220MC Equivalent & Substitute Parts

Part Overview

The CDRR157NP-220MC is a 22 µH shielded inductor manufactured by Sumida America Components Inc., designed for surface mount applications requiring moderate current handling and low DC resistance. This fixed inductor operates across industrial temperature ranges and is classified as an active product with full RoHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications where the primary part becomes unavailable or where alternative sourcing is required.

Substiute Parts

CDRR157NP-220MC

Sumida America Components Inc.In Stock: 1142CDRR157NP-220MC Datasheet

Current PartRFQ

SRR1806-220M

Bourns Inc.In Stock: 2304SRR1806-220M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDRR157NP-220MC is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 22 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance band)
• Shielding classification: Shielded (electromagnetic containment requirement)
• Core material: Ferrite (magnetic performance and frequency response)
• Mounting type: Surface Mount (PCB assembly compatibility)
• Package classification: Nonstandard (physical footprint compatibility)

Secondary Compatibility Parameters:

• Current rating: Minimum 3.0 A (operational current capacity)
• DC resistance: Maximum 53 mOhm (thermal and efficiency considerations)
• Operating temperature range: Minimum -40°C ~ 100°C coverage
• RoHS3 compliance: Required for regulatory alignment

The SRR1806-220M from Bourns Inc. meets all primary and secondary criteria, establishing it as a direct functional equivalent within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The CDRR157NP-220MC remains the specified component when available. It is an active product with full RoHS3 compliance and REACH unaffected status, supporting long-term supply chain stability.

Substitute Part Selection: The SRR1806-220M is selected as the equivalent substitute based on the following engineering factors:

• Both parts are active products with confirmed RoHS3 compliance
• Electrical parameters align within acceptable engineering tolerances
• Physical dimensions are compatible with standard PCB assembly processes
• The substitute demonstrates superior saturation current (6.2 A vs. 4.2 A), providing additional design margin
• Extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 100°C) supports broader application environments
• Both components carry identical ECCN and HTSUS classifications, ensuring regulatory consistency

Application Constraints: Substitution is valid for applications where the current requirement does not exceed 3.0 A continuous operation. For applications requiring the full 3.5 A rating of the primary part, the substitute must be evaluated against specific thermal and reliability requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRR1806-220M be used as a direct replacement for the CDRR157NP-220MC in all applications?

A: The SRR1806-220M is functionally equivalent for applications operating at or below 3.0 A continuous current. Applications requiring sustained operation at 3.0 A to 3.5 A must account for the substitute's lower current rating and higher DC resistance (53 mOhm vs. 47 mOhm), which may result in increased power dissipation.

Q: What are the physical compatibility considerations?

A: Both parts are classified as nonstandard package types with dimensions of approximately 18mm × 15mm and 7mm height. The SRR1806-220M dimensions (18.30mm × 14.00mm × 7.10mm) are within standard PCB assembly tolerances and are compatible with footprints designed for the CDRR157NP-220MC.

Q: Are there temperature range differences that affect substitution?

A: The SRR1806-220M operates across -40°C ~ 125°C, compared to the primary part's -40°C ~ 100°C range. This extended upper temperature limit provides additional design margin for thermal environments but does not restrict substitution in applications within the primary part's temperature specification.

Q: How do the DC resistance values affect circuit performance?

A: The primary part specifies 47 mOhm maximum DCR, while the substitute is rated at 53 mOhm. This 6 mOhm difference results in approximately 12.8% higher resistive losses at rated current. For power-sensitive applications, thermal analysis is required to confirm acceptable performance.

Q: Are both parts RoHS3 compliant?

A: Yes, both the CDRR157NP-220MC and SRR1806-220M are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity), supporting identical handling and storage requirements.

Q: What is the saturation current difference, and does it matter for substitution?

A: The primary part saturates at 4.2 A, while the substitute saturates at 6.2 A. The substitute's higher saturation current provides additional margin above the 3.0 A continuous rating, reducing the risk of inductance collapse in transient current conditions.