Würth Elektronik 744870003 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744870003 is a shielded 2-coil inductor array designed for surface mount applications. This component provides dual inductance configurations: 13.2 µH when coils are connected in series and 3.3 µH when connected in parallel. The part is classified as Active status and is ROHS3 compliant. Substitute parts are identified to provide equivalent electrical performance and mechanical compatibility for applications requiring alternative sourcing or inventory management.

Substiute Parts

744870003

Würth ElektronikIn Stock: 1419744870003 Datasheet

Current PartRFQ

SRF1280-3R3Y

Bourns Inc.In Stock: 2325SRF1280-3R3Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744870003 is determined by the following critical parameters:

• Inductance values: 3.3 µH (parallel) and 13.2 µH (series) configuration
• Tolerance: ±30%
• Number of coils: 2
• Shielding: Shielded construction
• Mounting type: Surface Mount
• Package footprint: 12.50 mm x 12.50 mm
• Operating temperature range: -40°C to 125°C
• Compliance: ROHS3 and REACH Unaffected

The Bourns Inc. SRF1280-3R3Y meets all critical electrical and mechanical parameters. Both parts share identical inductance specifications, tolerance, coil configuration, shielding type, and footprint dimensions. Both are Active status products with equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 744870003 and SRF1280-3R3Y are Active status products with ROHS3 compliance and REACH Unaffected designation. The SRF1280-3R3Y provides improved electrical performance characteristics, including higher current ratings and saturation current limits in both parallel and series configurations, along with lower DC resistance in the parallel configuration. Both parts maintain identical footprint dimensions and operating temperature specifications, ensuring mechanical and thermal compatibility. Selection between these parts should be based on application current requirements and available inventory.

Frequently Asked Questions (FAQ)

Q: Can the SRF1280-3R3Y replace the 744870003 in existing designs?

A: Yes. Both parts share identical inductance values (3.3 µH parallel, 13.2 µH series), tolerance (±30%), coil configuration (2 coils), shielding type (shielded), footprint (12.50 mm x 12.50 mm), and operating temperature range (-40°C to 125°C). The SRF1280-3R3Y has a 0.50 mm height difference (8.00 mm vs 8.50 mm), which must be evaluated for PCB assembly clearance.

Q: What are the key differences between these parts?

A: The SRF1280-3R3Y provides higher current ratings (10.4 A parallel vs 7.1 A, and 5.23 A series vs 4.65 A) and higher saturation current limits. The SRF1280-3R3Y also has lower DC resistance in parallel configuration (11 mOhm vs 21 mOhm). The 744870003 has a 0.50 mm greater height.

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

A: Yes. Both the 744870003 and SRF1280-3R3Y are supplied in Tape & Reel (TR) packaging for automated assembly.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH Unaffected, and classified as Active status products with MSL rating 1 (Unlimited).

Q: What should be considered when substituting these parts?

A: Verify PCB assembly clearance due to the 0.50 mm height difference. Confirm that the application current requirements are within the ratings of the selected part. Both parts are mechanically and electrically compatible for the specified inductance and configuration requirements.