CDRH124NP-181MC Equivalent & Substitute Parts

Part Overview

The CDRH124NP-181MC is a 180 µH shielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring moderate current handling at 850 mA with a maximum DC resistance of 620 mOhm. The component operates across an industrial temperature range of -40°C to 100°C and maintains Active product status with full RoHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative electrical characteristics better suit specific application requirements.

Substiute Parts

CDRH124NP-181MC

Sumida America Components Inc.In Stock: 1206CDRH124NP-181MC Datasheet

Current PartRFQ

SRR1240-181K

Bourns Inc.In Stock: 1490SRR1240-181K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDRH124NP-181MC is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 180 µH (fixed requirement)
• Shielding type: 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)
• Inductance test frequency: 100 kHz (measurement standard)

Secondary Compatibility Parameters:

• Current rating: Substitute must equal or exceed 850 mA
• DC resistance: Substitute must not exceed 620 mOhm maximum
• Operating temperature range: Substitute must cover or exceed -40°C to 100°C
• RoHS compliance: ROHS3 Compliant (regulatory requirement)
• Moisture sensitivity: MSL 1 (Unlimited) preferred for handling consistency

The SRR1240-181K from Bourns Inc. meets all primary equivalence criteria and exceeds secondary compatibility parameters, qualifying as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

CDRH124NP-181MC (Primary Part): The CDRH124NP-181MC maintains Active product status with confirmed inventory availability of 1165 pieces. This part is suitable for applications where the specified 850 mA current rating and 620 mOhm DCR maximum are acceptable design parameters. The component carries full RoHS3 compliance and operates within the -40°C to 100°C industrial temperature range. Selection of this part is appropriate when supply chain continuity with Sumida America Components Inc. is prioritized.

SRR1240-181K (Substitute Part): The SRR1240-181K from Bourns Inc. qualifies as a direct substitute with superior electrical characteristics across multiple parameters. This part provides higher current rating capability (980 mA versus 850 mA), lower DC resistance (550 mOhm versus 620 mOhm maximum), tighter inductance tolerance (±10% versus ±20%), and extended operating temperature range (-40°C to 125°C versus -40°C to 100°C). The SRR1240-181K maintains Active product status with 1451 pieces in inventory and carries identical RoHS3 compliance and MSL 1 rating. This substitute is appropriate when enhanced performance margins or extended temperature operation are required, or when Bourns supply chain availability is preferred.

Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification, ensuring equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRR1240-181K replace the CDRH124NP-181MC in existing designs?

A: Yes. Both inductors share identical inductance values (180 µH), core material (Ferrite), shielding type (Shielded), mounting type (Surface Mount), and package classification (Nonstandard). The SRR1240-181K provides equal or superior performance across all critical parameters including current rating, DC resistance, and operating temperature range.

Q: What are the physical dimension differences between these parts?

A: The CDRH124NP-181MC measures 0.472" L x 0.472" W x 0.177" H (12.00mm x 12.00mm x 4.50mm). The SRR1240-181K measures 0.492" L x 0.492" W x 0.177" H (12.50mm x 12.50mm x 4.50mm). Both share identical height, but the SRR1240-181K has slightly larger length and width dimensions. PCB layout verification is required to confirm footprint compatibility.

Q: How do the inductance tolerances differ?

A: The CDRH124NP-181MC specifies ±20% inductance tolerance, while the SRR1240-181K specifies ±10%. The tighter tolerance of the substitute part provides improved consistency and may benefit applications with strict inductance specifications.

Q: Are there differences in DC resistance specifications?

A: The CDRH124NP-181MC specifies 620 mOhm maximum DC resistance. The SRR1240-181K specifies 550 mOhm maximum DC resistance. The lower resistance of the substitute reduces power dissipation and heat generation in the inductor.

Q: Do both parts have identical RoHS and moisture sensitivity compliance?

A: Yes. Both the CDRH124NP-181MC and SRR1240-181K are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity level, ensuring identical handling, storage, and assembly requirements.

Q: What is the current saturation rating of the SRR1240-181K?

A: The SRR1240-181K specifies a saturation current (Isat) of 950 mA, indicating the current level at which the inductor begins to lose inductance due to core saturation. This parameter is not specified for the CDRH124NP-181MC.

Q: Can the CDRH124NP-181MC be used in applications requiring the extended temperature range of the SRR1240-181K?

A: No. The CDRH124NP-181MC operates only to 100°C maximum, while the SRR1240-181K operates to 125°C. Applications requiring operation above 100°C must use the SRR1240-181K or equivalent parts with extended temperature ratings.