74458010 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74458010 is a 10 µH unshielded drum core wirewound inductor rated for 4.3 A continuous current with a maximum DC resistance of 31 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is part of the WE-PD4 series. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit applications.

Substiute Parts

74458010

Würth ElektronikIn Stock: 720974458010 Datasheet

Current PartRFQ

SDR1806-100ML

Bourns Inc.In Stock: 1405SDR1806-100ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns Inc. SDR1806-100ML qualifies as a substitute for the 74458010 based on the following critical parameters:

• Inductance Match: Both parts specify 10 µH with ±20% tolerance at 100 kHz test frequency
• Core Technology: Both utilize ferrite unshielded drum core wirewound construction
• Temperature Range: Identical operating range of -40°C to 125°C
• Saturation Current: Both rated at 10 A Isat
• Mounting and Package: Both are surface mount components with nonstandard package geometry
• Compliance: Both are ROHS3 compliant with MSL 1 rating and REACH unaffected status

The substitute part demonstrates improved electrical performance in current rating (5.3 A vs 4.3 A) and lower DC resistance (25 mOhm vs 31 mOhm), making it suitable for applications where the original part is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the 74458010 and SDR1806-100ML are active production components with equivalent regulatory compliance. The SDR1806-100ML offers superior electrical characteristics with higher current rating capacity and reduced DC resistance, resulting in lower power dissipation. Selection between these parts should be based on circuit current requirements, thermal management constraints, and PCB layout compatibility with the nonstandard package dimensions. Both parts maintain identical temperature operating ranges and compliance certifications, ensuring functional equivalence in industrial applications.

Frequently Asked Questions (FAQ)

Q: Can the SDR1806-100ML directly replace the 74458010 in existing designs?

A: Yes. Both parts share identical inductance values, tolerance specifications, saturation current ratings, and operating temperature ranges. The substitute part provides improved current handling and lower resistance characteristics.

Q: What are the physical dimension differences between these parts?

A: The 74458010 measures 0.730" L × 0.600" W × 0.280" H (18.54mm × 15.24mm × 7.11mm). The SDR1806-100ML measures 0.720" L × 0.551" W × 0.272" H (18.30mm × 14.00mm × 6.90mm). Verify PCB footprint compatibility before substitution.

Q: Are there compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 moisture sensitivity ratings. Regulatory requirements are equivalent.

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

A: The SDR1806-100ML exhibits 25 mOhm maximum resistance compared to 31 mOhm in the 74458010. This 19% reduction in DC resistance decreases resistive losses and heat generation during operation, particularly beneficial in high-current applications.

Q: How do the self-resonant frequencies compare?

A: The 74458010 has a self-resonant frequency of 20 MHz, while the SDR1806-100ML reaches 25 MHz. Both values are suitable for standard switching power supply and filtering applications within typical operating frequency ranges.