744776282 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744776282 is a 820 µH unshielded drum core wirewound inductor rated for 320 mA continuous current with a maximum DC resistance of 2.55Ohm. This surface mount component operates across the temperature range of -40°C to 125°C and is classified as Active product status with full ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and current rating category.

Substiute Parts

744776282

Würth ElektronikIn Stock: 2451744776282 Datasheet

Current PartRFQ

SDR1006-821KL

Bourns Inc.In Stock: 1880SDR1006-821KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 744776282 is determined by the following critical parameters:

• Inductance Value: 820 µH with ±10% tolerance
• DC Resistance: 2.55Ohm maximum
• Core Type: Ferrite drum core, unshielded configuration
• Mounting: Surface mount, nonstandard package
• Temperature Range: -40°C to 125°C operational capability
• Compliance: ROHS3 and REACH requirements

The Bourns SDR1006-821KL meets these substitution criteria with matching inductance, DC resistance, core material, shielding configuration, temperature range, and regulatory compliance. Differences in current rating (240 mA vs. 320 mA) and saturation current do not preclude substitution when the application current requirement does not exceed the substitute part's 240 mA rating.

Parameter Comparison

Engineering Selection Recommendations

Both the 744776282 and SDR1006-821KL are Active status products with full ROHS3 compliance and REACH unaffected designation. Selection between these parts depends on application current requirements. The 744776282 supports continuous operation at 320 mA, while the SDR1006-821KL is rated for 240 mA continuous current. For applications requiring current levels between 240 mA and 320 mA, the 744776282 is the appropriate selection. For applications operating at or below 240 mA, either part satisfies electrical and regulatory requirements. Physical dimensions differ slightly (744776282: 10.00mm × 9.00mm × 5.90mm vs. SDR1006-821KL: 9.80mm × 9.80mm × 5.80mm), requiring PCB layout verification for mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can SDR1006-821KL replace 744776282 in all applications?

A: Substitution is valid only when the application current requirement does not exceed 240 mA. The SDR1006-821KL has a lower continuous current rating (240 mA vs. 320 mA). If your circuit draws more than 240 mA, the 744776282 must be used.

Q: Are the physical dimensions compatible?

A: Both parts are surface mount with nonstandard packages. The 744776282 measures 10.00mm × 9.00mm × 5.90mm, while the SDR1006-821KL measures 9.80mm × 9.80mm × 5.80mm. PCB footprint and clearance must be verified before substitution.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 744776282 and SDR1006-821KL are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory standards.

Q: What is the difference in saturation current between these parts?

A: The 744776282 has a saturation current of 410 mA, while the SDR1006-821KL has 560 mA. This difference reflects different core designs but does not affect substitution eligibility when continuous current ratings are respected.

Q: Are the inductance values and tolerances identical?

A: Yes. Both parts provide 820 µH inductance with ±10% tolerance and identical DC resistance of 2.55Ohm maximum, ensuring equivalent electrical performance in the circuit.