SWPA4018S3R3MT Equivalent & Substitute Parts

Part Overview

The SWPA4018S3R3MT is a 3.3 µH shielded drum core wirewound inductor manufactured by Shenzhen Sunlord Electronics Co., Ltd. This surface mount component is rated for 1.23 A continuous current with a maximum DC resistance of 91 mOhm and operates across the temperature range of -40°C to 125°C. The part is actively produced and available in high volume inventory.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining mechanical compatibility with the application's physical constraints and thermal requirements.

Substiute Parts

SWPA4018S3R3MT

Shenzhen Sunlord Electronics Co., Ltd.In Stock: 3550SWPA4018S3R3MT Datasheet

Current PartRFQ

BWVS004040183R3M00

Pulse ElectronicsIn Stock: 11458BWVS004040183R3M00 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SWPA4018S3R3MT is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value must be 3.3 µH with ±20% tolerance
• Shielding type must be shielded to maintain electromagnetic containment
• Core material must be ferrite for consistent frequency response
• Inductance test frequency must be 100 kHz

Mechanical Compatibility Criteria:

• Mounting type must be surface mount
• Package footprint must be 4.00 mm × 4.00 mm
• Height must not exceed application clearance limits

Thermal and Reliability Criteria:

• Operating temperature range must encompass the application's thermal envelope
• Moisture sensitivity level must be MSL 1 or equivalent

Regulatory Compliance:

• ECCN and HTSUS classifications must align for supply chain consistency

The BWVS004040183R3M00 from Pulse Electronics meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SWPA4018S3R3MT

The SWPA4018S3R3MT is the specified component with active product status and established supply chain availability. Selection of this part is appropriate when:

• Original design specifications require the Sunlord Electronics manufacturer
• Supply chain continuity with existing inventory is required
• The application operates within the -40°C to 125°C temperature range

Substitute Part: BWVS004040183R3M00

The BWVS004040183R3M00 is a qualified substitute with active product status from Pulse Electronics. This part is suitable when:

• The primary part is unavailable or subject to extended lead times
• The application requires lower DC resistance (70 mOhm vs. 91 mOhm), resulting in reduced power dissipation
• The application can accommodate the increased current rating (2.1 A vs. 1.23 A)
• The application can accommodate the increased height (2.00 mm vs. 1.80 mm) within PCB clearance constraints
• Extended low-temperature operation to -55°C is beneficial

Both parts carry identical ECCN and HTSUS classifications, ensuring regulatory compliance consistency. Both parts are MSL 1 rated with unlimited shelf life. The BWVS004040183R3M00 carries ROHS3 and REACH compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can the BWVS004040183R3M00 be used as a direct replacement for the SWPA4018S3R3MT?

A: The BWVS004040183R3M00 is electrically equivalent for the same inductance value and tolerance. Both parts are shielded ferrite core inductors with identical footprints (4.00 × 4.00 mm) and mounting type. The substitute has superior electrical characteristics (lower DCR, higher current rating) and extended temperature range. The only physical difference is height: 2.00 mm versus 1.80 mm. Verify that the additional 0.20 mm height does not violate PCB clearance constraints in your application.

Q: What are the key electrical differences between these parts?

A: Both parts maintain the same 3.3 µH inductance at ±20% tolerance and 100 kHz test frequency. The BWVS004040183R3M00 has lower DC resistance (70 mOhm vs. 91 mOhm), resulting in approximately 23% less resistive loss. The substitute is rated for 2.1 A continuous current compared to 1.23 A for the main part. These differences make the substitute suitable for applications requiring higher current handling or lower power dissipation.

Q: Are there any thermal considerations when substituting?

A: The SWPA4018S3R3MT operates from -40°C to 125°C. The BWVS004040183R3M00 extends the low-temperature limit to -55°C, providing additional thermal margin for cold-environment applications. Both parts maintain the same upper temperature limit of 125°C. The lower DCR of the substitute generates less heat during operation, which may improve thermal performance in current-limited applications.

Q: Do both parts have the same packaging and handling requirements?

A: Yes. Both parts are supplied in Tape & Reel (TR) packaging and carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating unlimited shelf life without special storage requirements. Both parts are classified under the same ECCN (EAR99) and HTSUS (8504.50.8000) codes for regulatory and customs purposes.

Q: What is the saturation current difference, and does it matter?

A: The SWPA4018S3R3MT has a saturation current (Isat) of 2.9 A, while the BWVS004040183R3M00 has an Isat of 2.2 A. Saturation current represents the point at which the inductor's magnetic core begins to saturate, causing inductance to degrade. In applications where the current approaches or exceeds 2.2 A, the substitute part may exhibit reduced inductance. Verify that your application's peak current remains below the substitute's saturation limit.

Q: Can I use the BWVS004040183R3M00 in a design originally specified for the SWPA4018S3R3MT?

A: Substitution is permissible when all of the following conditions are met: (1) the application current does not exceed 2.1 A continuous or approach 2.2 A saturation; (2) PCB clearance accommodates the 2.00 mm height; (3) the extended low-temperature capability to -55°C does not conflict with design assumptions; (4) the lower DCR does not introduce unintended circuit behavior changes. Perform circuit simulation or testing to confirm performance equivalence in your specific application.