Würth Elektronik 74457033 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74457033 is a 3.3 µH unshielded drum core wirewound inductor rated for 9 A continuous current with a maximum DC resistance of 9 mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is designed for applications requiring stable inductance at 100 kHz test frequency. The part is active in production status and available in Tape & Reel packaging. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the same nonstandard package class.

Substiute Parts

74457033

Würth ElektronikIn Stock: 133274457033 Datasheet

Current PartRFQ

P1252.332NL

Pulse ElectronicsIn Stock: 1964P1252.332NL Datasheet

DirectRFQ

P1252.332NLT

Pulse ElectronicsIn Stock: 2299P1252.332NLT Datasheet

DirectRFQ

SDR2207-3R3ML

Bourns Inc.In Stock: 1336SDR2207-3R3ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74457033 are qualified based on the following critical parameters:

• Inductance value: 3.3 µH with ±20% tolerance
• Current rating: minimum 9 A continuous
• Saturation current: 17 A
• DC resistance: maximum 9 mOhm
• Shielding configuration: Unshielded
• Core type: Wirewound construction
• Operating temperature range: -40°C to 125°C minimum
• Mounting: Surface mount, nonstandard package
• Test frequency: 100 kHz
• Compliance: ROHS3, MSL 1, REACH Unaffected

The identified substitutes maintain electrical equivalence within these parameters while accommodating minor variations in physical dimensions and DC resistance values that remain within acceptable operating margins.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain ROHS3 compliance, MSL 1 rating, and REACH Unaffected status, meeting the regulatory requirements of the original 74457033.

The SDR2207-3R3ML from Bourns Inc. provides the closest physical and electrical match, with identical dimensions, height, self-resonant frequency, and operating temperature range. The DC resistance of 7.8 mOhm is lower than the 9 mOhm maximum specification, resulting in reduced power dissipation.

The P1252.332NLT from Pulse Electronics offers Tape & Reel packaging identical to the original part and provides a 10 A current rating with 8.6 mOhm DC resistance. The physical dimensions are within 0.33mm length and 0.14mm width tolerances, and the seated height is 0.31mm lower. The operating temperature range extends to 130°C.

The P1252.332NL from Pulse Electronics is functionally equivalent to the P1252.332NLT but supplied in bulk packaging rather than Tape & Reel format.

Frequently Asked Questions (FAQ)

Q: Can the P1252.332NL and P1252.332NLT be used interchangeably with the 74457033?

A: Yes. Both parts meet the electrical specifications of the 74457033, including inductance, current rating, saturation current, and DC resistance limits. The primary difference is packaging format: P1252.332NL is supplied in bulk, while P1252.332NLT is supplied in Tape & Reel. The P1252.332NLT matches the original packaging specification.

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

A: The substitute parts feature DC resistance values of 8.6 mOhm (Pulse Electronics) and 7.8 mOhm (Bourns Inc.), compared to the 9 mOhm maximum of the original part. Lower DC resistance reduces resistive losses and heat generation during operation, which is beneficial for circuit performance and thermal management.

Q: Are there physical compatibility concerns with the substitute parts?

A: The SDR2207-3R3ML maintains identical dimensions and height to the 74457033. The P1252.332NL and P1252.332NLT have minor dimensional variations: length increases by 0.33mm and width by 0.14mm, while seated height decreases by 0.31mm. These variations are within typical PCB layout tolerances for nonstandard packages.

Q: Do all substitute parts support the same operating temperature range?

A: The 74457033 and SDR2207-3R3ML operate from -40°C to 125°C. The P1252.332NL and P1252.332NLT extend the upper limit to 130°C, providing additional thermal margin for high-temperature applications.

Q: Are all parts compliant with current regulatory standards?

A: Yes. All parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH Unaffected, meeting the regulatory requirements of the original component.