SWPA4018S150MT Equivalent & Substitute Parts

Part Overview

The SWPA4018S150MT is a 15 µH shielded drum core wirewound inductor manufactured by Shenzhen Sunlord Electronics Co., Ltd. This surface mount component is rated for 650 mA continuous current with a maximum DC resistance of 325 mOhm and operates across the temperature range of -40°C to 125°C. The part is currently active in production with 865 units in stock.

Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, or address specific application requirements where alternative electrical or mechanical characteristics are acceptable within the design parameters.

Substiute Parts

SWPA4018S150MT

Shenzhen Sunlord Electronics Co., Ltd.In Stock: 898SWPA4018S150MT Datasheet

Current PartRFQ

BWVS00404018150M00

Pulse ElectronicsIn Stock: 2000BWVS00404018150M00 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SWPA4018S150MT is based on the following critical parameters that must remain constant or within acceptable design margins:

Fixed Parameters (Must Match):

• Inductance value: 15 µH
• Inductance tolerance: ±20%
• Core material: Ferrite
• Shielding: Shielded
• Mounting type: Surface Mount
• Package footprint: 4.00 x 4.00 mm
• Inductance test frequency: 100 kHz

Variable Parameters (Acceptable Substitution Range):

• Current rating: Substitute must equal or exceed 650 mA
• DC resistance: Substitute must equal or be lower than 325 mOhm
• Saturation current: Substitute must equal or exceed 940 mA
• Operating temperature range: Substitute must cover or exceed -40°C to 125°C
• Maximum height: Substitute must not exceed 1.80 mm for PCB clearance compatibility

The BWVS00404018150M00 qualifies as a substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

SWPA4018S150MT (Primary Selection)

The SWPA4018S150MT is the specified component and remains the primary selection. It is actively manufactured by Shenzhen Sunlord Electronics Co., Ltd., with 865 units currently in stock. This part meets all design requirements with a maximum height of 1.80 mm and DC resistance of 325 mOhm maximum.

BWVS00404018150M00 (Substitute Selection)

The BWVS00404018150M00 manufactured by Pulse Electronics is electrically compatible as a substitute. Key advantages include:

• Lower DC resistance of 250 mOhm (compared to 325 mOhm maximum), resulting in reduced power dissipation
• Higher current rating of 1 A (compared to 650 mA), providing additional design margin
• Extended operating temperature range of -55°C to 125°C (compared to -40°C to 125°C)
• Higher inventory availability with 1928 units in stock
• RoHS3 compliance and REACH unaffected status

Critical Consideration:

The BWVS00404018150M00 has a maximum seated height of 2.00 mm, which exceeds the SWPA4018S150MT by 0.20 mm. This height difference must be evaluated against PCB layout constraints, component clearance requirements, and mechanical assembly specifications. If vertical clearance is limited to 1.80 mm or less, the BWVS00404018150M00 is not suitable for direct substitution.

Both parts are actively produced and available in tape and reel packaging suitable for automated assembly.

Frequently Asked Questions (FAQ)

Q: Can the BWVS00404018150M00 be used as a direct replacement for the SWPA4018S150MT?

A: Electrical substitution is valid provided that the additional 0.20 mm height (2.00 mm versus 1.80 mm) does not violate PCB clearance or mechanical assembly constraints. All electrical parameters are compatible or superior in the substitute part.

Q: What is the significance of the lower DC resistance in the BWVS00404018150M00?

A: The 250 mOhm DC resistance of the substitute is lower than the 325 mOhm maximum of the primary part. Lower DC resistance reduces resistive losses and heat generation during operation, which is favorable for thermal performance and efficiency.

Q: Are both parts suitable for the same operating temperature range?

A: The SWPA4018S150MT operates from -40°C to 125°C. The BWVS00404018150M00 operates from -55°C to 125°C, providing a wider low-temperature range. Both cover the standard -40°C to 125°C industrial range. Selection depends on whether extended low-temperature operation is required.

Q: Do both parts have the same inductance value and tolerance?

A: Yes. Both the SWPA4018S150MT and BWVS00404018150M00 are specified at 15 µH with ±20% tolerance, measured at 100 kHz. Inductance values are identical.

Q: What is the difference in current handling capability?

A: The SWPA4018S150MT is rated for 650 mA continuous current with a saturation current of 940 mA. The BWVS00404018150M00 is rated for 1 A continuous current with a saturation current of 1 A. The substitute provides higher current capacity, offering additional design margin for applications requiring sustained or peak current levels.

Q: Are both parts available in the same packaging format?

A: Yes. Both the SWPA4018S150MT and BWVS00404018150M00 are supplied in Tape & Reel (TR) packaging, suitable for automated pick-and-place assembly processes.

Q: What compliance certifications apply to each part?

A: The SWPA4018S150MT is classified as EAR99 for export control purposes. The BWVS00404018150M00 is RoHS3 compliant, REACH unaffected, and also classified as EAR99. Compliance requirements should be verified against specific application and regional regulations.

Q: How does the package footprint compare between the two parts?

A: Both parts have identical footprints of 4.00 mm length by 4.00 mm width. PCB layout compatibility is maintained. The only dimensional difference is the seated height: 1.80 mm for the SWPA4018S150MT and 2.00 mm for the BWVS00404018150M00.