Equivalent & Substitute Parts for 74456033

Part Overview

The Würth Elektronik 74456033 is a 3.3 µH unshielded drum core wirewound inductor rated for 5.3 A continuous current with a maximum DC resistance of 15 mOhm. This component is designed for surface mount applications in the WE-PD4 series and maintains 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

74456033

Würth ElektronikIn Stock: 333174456033 Datasheet

Current PartRFQ

SDR1005-3R3ML

Bourns Inc.In Stock: 2498SDR1005-3R3ML Datasheet

DirectRFQ

P0751.332NL

Pulse ElectronicsIn Stock: 4123P0751.332NL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74456033 are qualified based on the following critical parameters:

• Inductance Value: 3.3 µH ±20% tolerance
• Current Rating: Minimum 5.0 A continuous current capability
• DC Resistance: Maximum 15 mOhm to 18 mOhm
• Saturation Current: Minimum 6.4 A
• Operating Temperature: -40°C to 125°C minimum
• Mounting Type: Surface mount configuration
• Core Type: Ferrite or equivalent unshielded construction
• Compliance: RoHS3 compliant, MSL 1 rating

The identified substitutes maintain electrical equivalence within these parameters while accommodating minor variations in physical dimensions and frequency characteristics that do not impact functional performance in typical applications.

Parameter Comparison

Engineering Selection Recommendations

All three components maintain active product status and full RoHS3 compliance with MSL 1 ratings, qualifying them for equivalent substitution in surface mount applications requiring 3.3 µH inductance.

74456033 (Würth Elektronik): Primary reference component with 5.3 A current rating and 7.0 A saturation current. Establishes baseline performance specifications.

SDR1005-3R3ML (Bourns Inc.): Direct substitute with matching 15 mOhm DC resistance and identical operating temperature range. Current rating of 5.0 A and saturation current of 6.4 A remain within acceptable margins for applications not requiring maximum current headroom. Inductance test frequency of 1 kHz differs from primary component but does not affect functional equivalence.

P0751.332NL (Pulse Electronics): Qualified substitute with 5.4 A current rating exceeding primary component specifications. DC resistance maximum of 18 mOhm represents a 3 mOhm increase from primary component. Extended operating temperature range to 130°C provides additional thermal margin. Physical dimensions vary slightly (12.95mm × 9.40mm × 5.46mm) compared to primary component (12.70mm × 10.00mm × 5.30mm).

Frequently Asked Questions (FAQ)

Q: Can SDR1005-3R3ML be used as a direct replacement for 74456033?

A: Yes. Both components share identical inductance value, tolerance, DC resistance specification, and operating temperature range. The 5.0 A current rating of the Bourns part is 0.3 A lower than the Würth component but remains suitable for applications within this current envelope.

Q: What is the significance of the different inductance test frequencies?

A: The 74456033 and P0751.332NL are tested at 100 kHz, while the SDR1005-3R3ML is tested at 1 kHz. Both test methods confirm the 3.3 µH ±20% specification. Test frequency differences do not affect component equivalence for DC and low-frequency AC applications.

Q: Is the 3 mOhm increase in DC resistance for P0751.332NL acceptable?

A: The P0751.332NL maximum DC resistance of 18 mOhm compared to 15 mOhm for the primary component represents a 20% increase. This difference is acceptable for applications where power dissipation margins permit the additional resistive loss. Thermal analysis of the specific application circuit is required to confirm suitability.

Q: Are there physical dimension constraints for substitution?

A: All three components are surface mount with nonstandard packages. The P0751.332NL dimensions (12.95mm × 9.40mm × 5.46mm) differ slightly from the 74456033 (12.70mm × 10.00mm × 5.30mm). PCB layout verification is necessary to confirm mechanical fit, particularly for height-constrained applications.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All three components are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings and REACH unaffected status. ECCN and HTSUS classifications are identical across all parts.