Würth Elektronik 744776212 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744776212 is a 120 µH unshielded drum core wirewound inductor rated for 940 mA continuous current with a maximum DC resistance of 400mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is part of the WE-PD2 series. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory availability, or specific performance characteristics within the defined electrical and mechanical parameter space.

Substiute Parts

744776212

Würth ElektronikIn Stock: 1200744776212 Datasheet

Current PartRFQ

SDR1006-121KL

Bourns Inc.In Stock: 61225SDR1006-121KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Würth Elektronik 744776212 is determined by strict alignment of the following electrical and mechanical parameters:

• Inductance value: 120 µH with ±10% tolerance
• Current rating: minimum 890 mA (substitute parts must support the application's current requirements)
• DC resistance: 400mOhm maximum
• Core type: Ferrite, unshielded drum core wirewound construction
• Mounting: Surface mount, nonstandard package
• Operating temperature range: -40°C to 125°C minimum
• Compliance: ROHS3 compliant, REACH unaffected

The Bourns Inc. SDR1006-121KL meets these substitution criteria with equivalent inductance, matching DC resistance specification, compatible current rating, and identical compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744776212 and Bourns Inc. SDR1006-121KL are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts is based on:

• Current requirement alignment: The Würth part supports 940 mA continuous current, while the Bourns substitute supports 890 mA. Applications requiring the full 940 mA rating must use the Würth part. Applications operating at or below 890 mA may use either part.
• Saturation current: The Bourns SDR1006-121KL provides higher saturation current (1.5 A vs. 990 mA), offering additional margin in transient conditions.
• Physical dimensions: Both parts fit nonstandard surface mount packages with minimal height difference (5.90mm vs. 5.80mm). PCB layout compatibility should be verified for the specific application.
• Inventory and supply chain: Selection may be influenced by part availability and lead time from respective manufacturers.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR1006-121KL replace the Würth Elektronik 744776212 in all applications?

A: The Bourns part is suitable for applications operating at 890 mA or below. Applications requiring the full 940 mA continuous current rating of the Würth part must use the original component.

Q: Are the physical dimensions compatible for PCB layout?

A: The parts have similar nonstandard package dimensions (Würth: 10.00mm x 9.00mm x 5.90mm; Bourns: 9.80mm x 9.80mm x 5.80mm). PCB footprint and placement clearance must be verified for the specific design.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the Würth Elektronik 744776212 and Bourns Inc. SDR1006-121KL are ROHS3 compliant, REACH unaffected, and rated for -40°C to 125°C operation with MSL 1 (unlimited moisture sensitivity).

Q: What is the key electrical difference between these inductors?

A: The primary difference is the continuous current rating: Würth 940 mA versus Bourns 890 mA. Both maintain identical 120 µH inductance, ±10% tolerance, and 400mOhm maximum DC resistance.

Q: Are tape and reel packages available for both parts?

A: Yes. Both parts are supplied in Tape & Reel (TR) packaging suitable for automated assembly processes.