SWPA8040S331MT Equivalent & Substitute Parts

Part Overview

The SWPA8040S331MT is a 330 µH shielded drum core wirewound inductor manufactured by Shenzhen Sunlord Electronics Co., Ltd. This surface mount component is rated for 640 mA continuous current with a maximum DC resistance of 1.156 Ohm and operates across the temperature range of -40°C to 125°C. The part is currently active in production and available in tape and reel packaging.

Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as shielding type, current rating variations, or availability constraints.

Substiute Parts

SWPA8040S331MT

Shenzhen Sunlord Electronics Co., Ltd.In Stock: 3020SWPA8040S331MT Datasheet

Current PartRFQ

SDCH1V8040-331M-R

Eaton - Electronics DivisionIn Stock: 1791SDCH1V8040-331M-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SWPA8040S331MT is determined by strict alignment of the following critical parameters:

Inductance Value and Tolerance: The substitute part must provide 330 µH inductance with ±20% tolerance, measured at 100 kHz test frequency.

Current Rating and Saturation Current: The substitute must support continuous current operation at or above 640 mA, with saturation current (Isat) at or above 680 mA to maintain performance under transient conditions.

DC Resistance: The substitute DC resistance must not exceed 1.156 Ohm maximum to ensure equivalent power dissipation and thermal characteristics.

Core Material and Shielding: Both the main part and substitute utilize ferrite core material. The main part is fully shielded; substitutes with semi-shielded or shielded configurations are acceptable based on application electromagnetic compatibility requirements.

Operating Temperature Range: The substitute must support the full -40°C to 125°C operating temperature range.

Mounting and Package: Both parts are surface mount components with identical physical dimensions (8.00 x 8.00 x 4.20 mm) and nonstandard package classification.

Moisture Sensitivity: The substitute must maintain MSL 1 (Unlimited) rating for equivalent handling and storage requirements.

Parameter Comparison

Engineering Selection Recommendations

SDCH1V8040-331M-R as Substitute for SWPA8040S331MT:

The SDCH1V8040-331M-R from Eaton - Electronics Division qualifies as a functional substitute based on matched inductance value, tolerance, core material, operating temperature range, and physical package dimensions. Both parts are active products with current manufacturing status and unlimited moisture sensitivity classification.

The substitute exhibits a continuous current rating of 600 mA, which is 40 mA lower than the main part's 640 mA rating. Applications operating at or below 600 mA continuous current are fully compatible. The saturation current of 700 mA in the substitute exceeds the main part's 680 mA specification, providing equivalent transient performance margin.

DC resistance specifications are equivalent: the substitute's 1.15 Ohm maximum is within the tolerance band of the main part's 1.156 Ohm maximum specification.

The primary design consideration is shielding configuration. The main part provides full shielding, while the substitute provides semi-shielded construction. Applications requiring full electromagnetic shielding must evaluate whether semi-shielded performance is acceptable for the specific circuit environment and EMI/RFI requirements.

Both parts comply with ECCN EAR99 and HTSUS 8504.50.8000 classifications. The substitute carries ROHS3 compliance and REACH Unaffected status certifications.

Frequently Asked Questions (FAQ)

Q: Can the SDCH1V8040-331M-R substitute for SWPA8040S331MT in all applications?

A: The substitute is compatible for applications operating at continuous currents of 600 mA or below. If your application requires the full 640 mA continuous current rating of the main part, the substitute is not suitable. Additionally, applications with strict electromagnetic shielding requirements must evaluate whether the semi-shielded construction of the substitute meets EMI/RFI specifications.

Q: What is the difference between shielded and semi-shielded inductors?

A: Shielded inductors provide complete electromagnetic containment, minimizing radiated emissions and external field coupling. Semi-shielded inductors provide partial shielding, offering reduced EMI performance compared to fully shielded designs but with potentially lower cost and smaller profile. Selection depends on circuit-level EMI/RFI requirements.

Q: Are the physical dimensions identical between the main part and substitute?

A: Yes. Both SWPA8040S331MT and SDCH1V8040-331M-R are packaged in 8.00 x 8.00 x 4.20 mm nonstandard surface mount packages with identical footprints and mounting heights. PCB layout and assembly processes require no modification.

Q: What is the significance of the ±20% inductance tolerance?

A: The ±20% tolerance indicates that the actual inductance value may vary between 264 µH and 396 µH from the nominal 330 µH specification. Both the main part and substitute share this tolerance band, ensuring equivalent circuit performance predictability.

Q: How do the DC resistance specifications compare?

A: The main part specifies 1.156 Ohm maximum; the substitute specifies 1.15 Ohm maximum. These values are equivalent within engineering tolerance and produce identical power dissipation and thermal characteristics in circuit operation.

Q: Are both parts available in tape and reel packaging?

A: Yes. Both SWPA8040S331MT and SDCH1V8040-331M-R are supplied in tape and reel (TR) packaging suitable for automated assembly processes.

Q: What compliance certifications apply to the substitute part?

A: The SDCH1V8040-331M-R carries ROHS3 compliance and REACH Unaffected status. Both parts are classified under ECCN EAR99 and HTSUS 8504.50.8000 for export and tariff purposes.