CDH113NP-180MC Equivalent & Substitute Parts

Part Overview

The CDH113NP-180MC is an 18 µH unshielded wirewound surface mount inductor manufactured by Sumida America Components Inc. This component is rated for 1.45 A maximum current with a DC resistance of 78 mOhm maximum and operates across a temperature range of -30°C to 100°C. The part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

CDH113NP-180MC

Sumida America Components Inc.In Stock: 772CDH113NP-180MC Datasheet

Current PartRFQ

SCRH103R-180

Signal TransformerIn Stock: 1087SCRH103R-180 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH113NP-180MC is determined by the following critical parameters:

Inductance Value: Both the main part and substitute must maintain 18 µH inductance to ensure circuit functionality.

Current Rating: The substitute must support the application's current requirements. The CDH113NP-180MC is rated for 1.45 A; substitutes with equal or higher current ratings are acceptable.

DC Resistance: The substitute's DCR must not exceed the maximum allowable resistance for the application. The CDH113NP-180MC specifies 78 mOhm maximum.

Mounting Type: Both components must be surface mount to maintain PCB compatibility.

Environmental Compliance: Both components must meet ROHS3 compliance requirements for regulatory acceptance.

Physical Dimensions: Components must fit within the available PCB footprint space.

The SCRH103R-180 from Signal Transformer meets the core substitution criteria of matching inductance value and surface mount configuration while providing enhanced current handling capability.

Parameter Comparison

Engineering Selection Recommendations

The SCRH103R-180 is an active product from Signal Transformer and serves as a functional substitute for the obsolete CDH113NP-180MC. Both components share identical inductance specifications of 18 µH and are configured for surface mount applications.

The SCRH103R-180 provides superior current handling at 2 A compared to the CDH113NP-180MC's 1.45 A rating, offering design margin for applications requiring the original part. The substitute operates across an extended temperature range of -40°C to 125°C, exceeding the original part's -30°C to 100°C specification.

Both components maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring regulatory and environmental compatibility.

The SCRH103R-180 incorporates shielding, whereas the CDH113NP-180MC is unshielded. This difference may affect electromagnetic interference characteristics in the application circuit and should be evaluated based on specific design requirements.

The DC resistance of the SCRH103R-180 is specified at 116 mOhm maximum, which is higher than the original part's 78 mOhm maximum. This parameter difference may impact power dissipation and thermal performance in current-sensitive applications.

Physical dimensions of the SCRH103R-180 are slightly smaller than the CDH113NP-180MC, with reduced height, allowing for improved PCB layout flexibility.

Frequently Asked Questions (FAQ)

Q: Can the SCRH103R-180 directly replace the CDH113NP-180MC in all applications?

A: Both components share the same 18 µH inductance value and surface mount configuration. However, differences in DC resistance (116 mOhm vs. 78 mOhm), shielding characteristics (shielded vs. unshielded), and tolerance (±30% vs. ±20%) must be evaluated against specific circuit requirements before substitution.

Q: What is the significance of the higher DC resistance in the SCRH103R-180?

A: The SCRH103R-180 exhibits 38 mOhm higher maximum DC resistance than the CDH113NP-180MC. In applications where inductor losses directly impact efficiency or thermal performance, this difference should be calculated and compared against design margins.

Q: Does the shielding difference between these components affect substitution?

A: The SCRH103R-180 is shielded while the CDH113NP-180MC is unshielded. Shielding reduces electromagnetic radiation and susceptibility to external fields. Applications sensitive to EMI may benefit from the shielded design, while applications requiring minimal shielding effects should account for this difference.

Q: Are the physical dimensions compatible with the original PCB footprint?

A: The SCRH103R-180 is slightly smaller in length and width (10.50mm x 10.30mm vs. 11.20mm x 11.00mm) and has reduced height (3.10mm vs. 3.70mm). These dimensions are generally compatible with footprints designed for the CDH113NP-180MC, but PCB layout verification is necessary.

Q: What is the tolerance difference between these components?

A: The CDH113NP-180MC specifies ±20% tolerance while the SCRH103R-180 specifies ±30% tolerance. Applications requiring tighter inductance accuracy should account for this wider tolerance range in the substitute part.

Q: Is the SCRH103R-180 available in the same packaging format?

A: The SCRH103R-180 is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production. The original part's packaging format was not specified in available documentation.

Q: What is the current saturation rating of the SCRH103R-180?

A: The SCRH103R-180 has a saturation current (Isat) of 1.9 A. This specification indicates the current level at which the inductor's inductance begins to degrade due to core saturation. The original CDH113NP-180MC does not specify this parameter.