SWT-0.25-256 Equivalent & Substitute Parts

Part Overview

The SWT-0.25-256 is a 256 µH unshielded toroidal inductor manufactured by Amgis, LLC, rated for 250 mA with 2.2Ω DC resistance. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates across the temperature range of -40°C to 125°C and meets ROHS3 compliance standards.

Substiute Parts

SWT-0.25-256

Amgis, LLCIn Stock: 794SWT-0.25-256 Datasheet

Current PartRFQ

SH150T-0.25-256

Amgis, LLCIn Stock: 788SH150T-0.25-256 Datasheet

SimilarRFQ

PE-53809NL

Pulse ElectronicsIn Stock: 2399PE-53809NL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SWT-0.25-256 are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 256 µH
• Inductance tolerance: ±20%
• Current rating: 250 mA
• DC resistance: 2.2Ω
• Mounting type: Through Hole
• Component type: Toroidal inductor

Secondary Considerations:

• Operating temperature range compatibility
• RoHS and regulatory compliance
• Physical package dimensions and terminal configuration
• Core material and shielding characteristics

Two substitute parts meet these criteria with variations in shielding and terminal orientation that do not affect electrical substitutability for applications where the core electrical specifications are the primary requirement.

Parameter Comparison

Engineering Selection Recommendations

SH150T-0.25-256 (Amgis, LLC): This substitute maintains identical electrical specifications and operating temperature range as the SWT-0.25-256. The part is active in production with ROHS3 compliance. The primary difference is terminal configuration (corner terminals versus open terminals) and slightly larger physical dimensions. This part is suitable for direct substitution where PCB layout accommodates the dimensional change.

PE-53809NL (Pulse Electronics): This substitute matches all core electrical parameters and extends the operating temperature range to -40°C ~ 130°C. The key distinction is shielded construction versus unshielded, which affects electromagnetic interference characteristics. This part is active in production with ROHS3 compliance. Selection of this part should account for the shielding difference and vertical terminal orientation, which may require PCB layout modification.

Both substitutes are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for the SWT-0.25-256 application space.

Frequently Asked Questions (FAQ)

Q: Can SH150T-0.25-256 replace SWT-0.25-256 directly on the PCB?

A: Electrical substitution is valid. Physical substitution requires verification of PCB footprint compatibility. The SH150T-0.25-256 has corner terminals and slightly larger dimensions (11.00mm x 11.20mm versus 8.60mm x 8.60mm), which may require PCB layout adjustment.

Q: What is the difference between shielded and unshielded versions?

A: The PE-53809NL is shielded, reducing electromagnetic radiation and susceptibility to external fields. The SWT-0.25-256 and SH150T-0.25-256 are unshielded. Selection depends on application EMI requirements and circuit board layout constraints.

Q: Are all three parts ROHS3 compliant?

A: Yes. SWT-0.25-256, SH150T-0.25-256, and PE-53809NL are all ROHS3 compliant and REACH unaffected.

Q: Which substitute has the widest operating temperature range?

A: PE-53809NL operates from -40°C to 130°C, extending 5°C above the original SWT-0.25-256 specification of -40°C to 125°C.

Q: Do the substitutes have the same inductance tolerance?

A: Yes. All three parts maintain ±20% inductance tolerance at 10 kHz test frequency.