SPD127R-183M Equivalent & Substitute Parts

Part Overview

The SPD127R-183M is an 18 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications requiring moderate current handling and low DC resistance. This component operates across the industrial temperature range of -55°C to 125°C and is RoHS3 compliant. The part is currently active in production with 828 pieces available in inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Substiute Parts

SPD127R-183M

API Delevan Inc.In Stock: 848SPD127R-183M Datasheet

Current PartRFQ

SRR1208-180ML

Bourns Inc.In Stock: 3277SRR1208-180ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD127R-183M is determined by the following critical parameters:

Inductance Value: 18 µH with ±20% tolerance is the primary electrical specification. Substitute parts must match this inductance value within the tolerance band.

Current Rating: The main part supports 3.9 A continuous current. Substitute parts must maintain equal or greater current capacity to ensure thermal and electrical performance equivalence.

DC Resistance: The 52 mOhm maximum specification defines power dissipation characteristics. Substitute parts with lower DCR values provide improved efficiency and are acceptable; higher DCR values are not acceptable.

Core Type and Shielding: Ferrite core material with shielding is required for electromagnetic compatibility and performance consistency. Both attributes must be maintained in substitute parts.

Mounting and Package: Surface mount configuration with tape and reel packaging ensures mechanical and assembly compatibility with the original application.

Compliance: RoHS3 compliance is mandatory for regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

SRR1208-180ML (Bourns Inc.) qualifies as a direct substitute for the SPD127R-183M based on the following criteria:

Both parts are active production components with RoHS3 compliance and identical inductance specifications of 18 µH at ±20% tolerance. The SRR1208-180ML provides superior DC resistance performance at 40 mOhm maximum compared to 52 mOhm maximum, resulting in lower power dissipation. Current ratings are equivalent within acceptable margins (3.8 A versus 3.9 A), with saturation current of 4.0 A providing additional headroom. Both components feature ferrite cores with shielding, surface mount configuration, and tape and reel packaging.

The operating temperature range of the SRR1208-180ML extends to -40°C minimum, which is narrower than the SPD127R-183M range of -55°C to 125°C. This difference is relevant only for applications requiring operation below -40°C. For standard industrial applications within the -40°C to 125°C range, the SRR1208-180ML provides equivalent or superior performance.

Both parts maintain MSL 1 (Unlimited) moisture sensitivity classification, ensuring identical handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRR1208-180ML replace the SPD127R-183M in all applications?

A: The SRR1208-180ML is electrically and mechanically compatible for applications operating within -40°C to 125°C. Applications requiring operation below -40°C must retain the SPD127R-183M due to its extended lower temperature rating of -55°C.

Q: What is the significance of the lower DC resistance in the SRR1208-180ML?

A: The SRR1208-180ML exhibits 40 mOhm maximum DC resistance compared to 52 mOhm maximum in the SPD127R-183M. Lower DC resistance reduces I²R power losses, resulting in improved thermal performance and efficiency. This is a beneficial characteristic for substitution.

Q: Are the physical dimensions compatible between these parts?

A: The SPD127R-183M measures 12.00mm × 12.00mm × 8.00mm (height seated max), while the SRR1208-180ML measures 12.70mm × 12.70mm × 8.50mm. The SRR1208-180ML is slightly larger in all dimensions. PCB layout and clearance verification is required before substitution to confirm mechanical fit within the application.

Q: Do both parts meet the same compliance standards?

A: Both the SPD127R-183M and SRR1208-180ML are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS code 8504.50.4000. Compliance equivalence is confirmed.

Q: What is the current saturation difference between these inductors?

A: The SPD127R-183M has saturation current (Isat) of 3.9 A, while the SRR1208-180ML has saturation current of 4.0 A. Both values exceed the continuous current ratings, indicating adequate saturation margin for normal operation.

Q: Are packaging and handling requirements identical?

A: Both parts are supplied in tape and reel (TR) packaging with MSL 1 (Unlimited) moisture sensitivity level. Handling, storage, and assembly processes are equivalent.