Würth Elektronik 74458001 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74458001 is a 1 µH unshielded drum core wirewound inductor rated for 8.6 A continuous current with 9 mOhm maximum DC resistance. This component is designed for surface mount applications requiring low inductance values with high current handling capability. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory management, or specific performance trade-offs within the defined electrical and mechanical parameter space.

Substiute Parts

74458001

Würth ElektronikIn Stock: 100174458001 Datasheet

Current PartRFQ

P0250.102NL

Pulse ElectronicsIn Stock: 877P0250.102NL Datasheet

MFR RecommendedRFQ

SDR1806-1R0ML

Bourns Inc.In Stock: 946SDR1806-1R0ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74458001 are qualified based on the following critical parameters:

• Inductance value: 1 µH (exact match required)
• Current rating: minimum 8.6 A continuous
• DC resistance: maximum 9 mOhm
• Shielding configuration: unshielded
• Mounting type: surface mount
• Operating temperature range: minimum -40°C to 125°C coverage
• Inductance test frequency: 100 kHz

The identified substitutes maintain these core electrical specifications while allowing variation in saturation current, self-resonant frequency, and physical dimensions within acceptable mechanical tolerances for the nonstandard package category.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status and ROHS3 compliance, qualifying them for equivalent use in applications meeting the specified electrical parameters.

The Pulse Electronics P0250.102NL provides tighter inductance tolerance (±15% versus ±20%) and extended operating temperature range to 130°C, with identical current rating and DC resistance specifications. Physical dimensions vary slightly within the nonstandard package category.

The Bourns SDR1806-1R0ML offers superior DC resistance performance at 4 mOhm maximum (55% lower than the primary part) and higher current rating at 10 A, with increased saturation current of 30 A. These characteristics provide enhanced thermal performance and headroom for transient current conditions. Physical dimensions are comparable to the primary part.

Selection between substitutes depends on application requirements for inductance tolerance, thermal performance, and DC resistance losses. All parts satisfy the core 1 µH, 8.6 A, 9 mOhm specification envelope.

Frequently Asked Questions (FAQ)

Q: Can P0250.102NL be used as a direct replacement for 74458001?

A: Yes. Both parts share identical inductance (1 µH), current rating (8.6 A), and DC resistance (9 mOhm maximum). The P0250.102NL provides tighter tolerance and higher temperature rating. Physical dimensions differ slightly but remain within nonstandard package specifications.

Q: What are the advantages of SDR1806-1R0ML over the primary part?

A: The SDR1806-1R0ML provides lower DC resistance (4 mOhm versus 9 mOhm), reducing I²R losses by approximately 55%. It also offers higher current rating (10 A versus 8.6 A) and saturation current (30 A versus 25 A), providing greater margin for transient conditions.

Q: Are all three parts ROHS3 compliant?

A: Yes. The 74458001, P0250.102NL, and SDR1806-1R0ML are all ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity).

Q: What is the significance of inductance tolerance differences?

A: The P0250.102NL specifies ±15% tolerance compared to ±20% for the primary part and Bourns substitute. Tighter tolerance reduces inductance variation across production batches, beneficial for applications with strict frequency or impedance requirements.

Q: Do physical dimension differences affect PCB layout compatibility?

A: Physical dimensions vary within the nonstandard package category. The 74458001 measures 18.54mm × 15.24mm × 7.11mm (height), while P0250.102NL measures 18.62mm × 15.14mm × 7.36mm and SDR1806-1R0ML measures 18.30mm × 14.00mm × 6.90mm. PCB footprint and clearance requirements must be verified for each substitute.

Q: Which part should be selected for high-temperature applications?

A: The P0250.102NL supports operation to 130°C, compared to 125°C for both the primary part and Bourns substitute. For applications approaching 125°C, the P0250.102NL provides additional thermal margin.