SWS-1.81-18 Equivalent & Substitute Parts

Part Overview

The SWS-1.81-18 is an 18 µH unshielded toroidal inductor manufactured by Amgis, LLC, rated for 1.81 A with 60mOhm DC resistance. This component is designed for surface mount applications in power conversion and filtering circuits. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to address inventory availability, packaging preferences, or specific shielding requirements while maintaining electrical equivalence.

Substiute Parts

SWS-1.81-18

Amgis, LLCIn Stock: 920SWS-1.81-18 Datasheet

Current PartRFQ

PE-53825SNL

Pulse ElectronicsIn Stock: 2150PE-53825SNL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical electrical parameters: inductance value (18 µH), tolerance (±20%), current rating (1.81 A), and DC resistance (60mOhm). The PE-53825SNL qualifies as a direct electrical substitute based on these core specifications. Mechanical differences including shielding configuration, package dimensions, and packaging format (Tube vs. Tape & Reel) do not affect electrical equivalence but must be evaluated for physical fit and EMI performance requirements in the target application.

Parameter Comparison

Engineering Selection Recommendations

Both components maintain Active product status and full RoHS3 compliance with identical moisture sensitivity ratings. The PE-53825SNL operates across a wider temperature range (-40°C ~ 130°C vs. -40°C ~ 125°C), providing additional thermal margin in high-temperature applications. Selection between these parts depends on application-specific requirements: the SWS-1.81-18 is suitable for unshielded applications with space constraints due to its smaller footprint, while the PE-53825SNL offers shielded construction for EMI-sensitive circuits and is available in higher inventory quantities. Packaging format (Tape & Reel vs. Tube) should align with assembly line requirements and component handling procedures.

Frequently Asked Questions (FAQ)

Q: Are SWS-1.81-18 and PE-53825SNL electrically interchangeable? A: Yes. Both components share identical inductance (18 µH), tolerance (±20%), current rating (1.81 A), and DC resistance (60mOhm) specifications, making them electrically equivalent for circuit operation.

Q: What is the primary difference between these two inductors? A: The main difference is shielding configuration. The SWS-1.81-18 is unshielded, while the PE-53825SNL is shielded. The PE-53825SNL also has larger physical dimensions and operates to 130°C versus 125°C for the SWS-1.81-18.

Q: Will the PE-53825SNL fit in the same PCB footprint as the SWS-1.81-18? A: No. The PE-53825SNL has larger dimensions (0.570" x 0.565" vs. 0.504" x 0.504") and greater height (0.360" vs. 0.285"), requiring verification of available board space before substitution.

Q: When should I select the shielded PE-53825SNL over the unshielded SWS-1.81-18? A: Select the shielded variant when the application requires EMI containment or operates in electromagnetically noisy environments. Unshielded inductors are suitable for isolated circuits with minimal EMI concerns.

Q: Are there packaging considerations for these parts? A: Yes. The SWS-1.81-18 is supplied in Tape & Reel format for automated assembly, while the PE-53825SNL is supplied in Tube format. Verify compatibility with your assembly equipment and handling procedures.

Q: Do both parts meet the same compliance standards? A: Yes. Both components are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) ratings, ensuring equivalent regulatory compliance.