SWS-4.3-10 Equivalent & Substitute Parts

Part Overview

The SWS-4.3-10 is a 10 µH unshielded toroidal inductor manufactured by Amgis, LLC, designed for surface mount applications with a current rating of 4.3 A and DC resistance of 26mOhm. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

SWS-4.3-10

Amgis, LLCIn Stock: 1174SWS-4.3-10 Datasheet

Current PartRFQ

P0845SNL

Pulse ElectronicsIn Stock: 991P0845SNL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SWS-4.3-10 is determined by the following critical parameters:

• Inductance value within ±20% tolerance (10 µH nominal allows 8–12 µH range)
• Current rating equal to or greater than 4.3 A
• Operating temperature range covering -40°C ~ 130°C
• Surface mount toroidal configuration
• Nonstandard package compatibility
• ROHS3 compliance

The substitute part P0845SNL meets these criteria with an inductance of 10.2 µH (within tolerance), matching current rating of 4.3 A, and identical operating temperature range. Variations in DC resistance and shielding characteristics do not disqualify substitution when primary electrical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Both the SWS-4.3-10 and P0845SNL maintain Active product status with full ROHS3 and REACH compliance. Selection between these parts should account for the following provided specifications:

The P0845SNL exhibits higher DC resistance (50mOhm versus 26mOhm), which results in increased power dissipation in the component. The inductance differential of 0.2 µH falls within the ±20% tolerance band and is electrically equivalent for most applications. The P0845SNL provides shielded construction compared to the unshielded SWS-4.3-10, which may be advantageous in noise-sensitive circuits. Physical dimensions differ slightly, with the P0845SNL measuring 15.75mm x 15.24mm and seated height of 9.91mm compared to 15.00mm x 15.00mm and 8.25mm respectively. PCB layout and thermal management considerations should account for these dimensional variations.

Frequently Asked Questions (FAQ)

Q: Can P0845SNL directly replace SWS-4.3-10 in all applications?

A: Substitution is valid when the application tolerates the inductance variation of 0.2 µH within the ±20% tolerance specification and the increased DC resistance of 50mOhm does not exceed thermal or efficiency requirements. Physical dimensions must be verified for PCB layout compatibility.

Q: What is the significance of the shielding difference?

A: The SWS-4.3-10 is unshielded while P0845SNL is shielded. Shielded construction reduces electromagnetic interference emission and susceptibility. Selection depends on circuit requirements for EMI performance and board layout constraints.

Q: How does the DC resistance difference affect performance?

A: The P0845SNL DCR of 50mOhm is 24mOhm higher than the SWS-4.3-10 at 26mOhm. This increases resistive losses proportional to I²R. At the 4.3 A rating, the P0845SNL dissipates approximately 0.925 W compared to 0.481 W for the SWS-4.3-10. Thermal management and efficiency specifications must be evaluated for the target application.

Q: Are there packaging or mounting differences?

A: Both components use surface mount toroidal configuration with nonstandard packages. The P0845SNL is supplied in Tube packaging while SWS-4.3-10 uses Tape & Reel. Physical dimensions differ by approximately 0.75mm in length and 0.24mm in width, with seated height difference of 1.66mm. PCB footprint and assembly equipment compatibility should be confirmed.

Q: Do both parts meet regulatory requirements?

A: Both SWS-4.3-10 and P0845SNL are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8504.50.4000. Moisture sensitivity level is 1 (Unlimited) for both components.