CDRH127NP-181MC Equivalent & Substitute Parts

Part Overview

The CDRH127NP-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 (1.3 A) with controlled DC resistance (350mOhm Max). The component operates across the industrial temperature range of -40°C to 100°C and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining mechanical compatibility and compliance certifications.

Substiute Parts

CDRH127NP-181MC

Sumida America Components Inc.In Stock: 1094CDRH127NP-181MC Datasheet

Current PartRFQ

SRR1280-181K

Bourns Inc.In Stock: 2018SRR1280-181K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDRH127NP-181MC is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value must be 180 µH
• Current rating must meet or exceed 1.3 A
• DC resistance must not exceed 350mOhm
• Shielding configuration must be shielded

Mechanical Compatibility Criteria:

• Mounting type must be surface mount
• Package footprint must accommodate 12.00mm x 12.00mm base dimensions
• Height must not exceed 8.00mm seated height

Compliance Requirements:

• RoHS3 compliance mandatory
• Moisture Sensitivity Level 1 or equivalent

The substitute part SRR1280-181K meets all electrical and mechanical criteria with enhanced performance characteristics in current rating and DC resistance.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: CDRH127NP-181MC

Use the CDRH127NP-181MC when the original design specification requires the exact footprint dimensions of 12.00mm x 12.00mm and the operating temperature range does not exceed 100°C. This part is RoHS3 compliant and carries MSL 1 rating, suitable for standard assembly processes.

Substitute Part: SRR1280-181K

The SRR1280-181K by Bourns Inc. is a qualified substitute when:

• The PCB layout can accommodate a 12.50mm x 12.50mm footprint
• The application benefits from lower DC resistance (300mOhm vs 350mOhm)
• Higher current margin is required (1.75 A vs 1.3 A)
• Extended operating temperature range to 125°C is advantageous
• Tighter inductance tolerance (±10% vs ±20%) improves circuit performance

Both parts maintain RoHS3 compliance and MSL 1 rating. The substitute part offers superior electrical performance with marginally larger footprint dimensions.

Frequently Asked Questions (FAQ)

Q: Can SRR1280-181K replace CDRH127NP-181MC in all applications?

A: Substitution is valid when the PCB layout accommodates the 12.50mm x 12.50mm footprint of the SRR1280-181K. The electrical parameters are compatible, with the substitute offering improved performance in current rating and DC resistance. Verify PCB routing and component placement clearances before implementation.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The SRR1280-181K has 300mOhm maximum DC resistance compared to 350mOhm in the CDRH127NP-181MC. Lower DC resistance reduces power dissipation and heat generation in the inductor, improving circuit efficiency and thermal performance.

Q: Are both parts suitable for high-temperature applications?

A: The CDRH127NP-181MC operates to 100°C maximum. The SRR1280-181K extends to 125°C, providing additional thermal margin for applications approaching the upper temperature limit. Both parts maintain performance across the -40°C to 100°C range.

Q: How do the inductance tolerances affect circuit design?

A: The CDRH127NP-181MC has ±20% tolerance, while the SRR1280-181K has ±10% tolerance. Tighter tolerance in the substitute part reduces inductance variation across production batches, improving circuit consistency and reducing design margin requirements.

Q: What is the impact of the footprint size difference?

A: The substitute part is 0.50mm larger in both length and width (12.50mm vs 12.00mm). This requires verification of PCB layout spacing, trace routing, and adjacent component placement. Height remains identical at 8.00mm maximum.

Q: Are both parts RoHS3 compliant?

A: Yes. Both CDRH127NP-181MC and SRR1280-181K are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, suitable for standard surface mount assembly processes without special handling requirements.