SPD73R-473M Equivalent & Substitute Parts

Part Overview

The SPD73R-473M is a 47 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.16 A with a maximum DC resistance of 360 mOhm. This surface mount component operates across the temperature range of -55°C to 125°C and is ROHS3 compliant. The part is currently active in production with 1061 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

SPD73R-473M

API Delevan Inc.In Stock: 1163SPD73R-473M Datasheet

Current PartRFQ

SRR0745A-470M

Bourns Inc.In Stock: 21224SRR0745A-470M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD73R-473M is determined by the following critical parameters:

• Inductance Value: 47 µH with ±20% tolerance
• Current Rating: Minimum 1.16 A saturation current
• DC Resistance: Maximum 360 mOhm
• Shielding: Shielded construction required
• Core Material: Ferrite core
• Package Footprint: 7.30mm x 7.30mm surface mount
• Temperature Range: Operating capability within -55°C to 125°C
• Compliance: ROHS3 compliant

The SRR0745A-470M from Bourns Inc. meets these substitution criteria with matching inductance, shielded ferrite core construction, identical package footprint, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The SRR0745A-470M qualifies as a direct substitute based on matching inductance value, tolerance, shielded ferrite core construction, identical package footprint, and ROHS3 compliance. Both parts are active products with established supply availability.

The SRR0745A-470M exhibits lower DC resistance (210 mOhm versus 360 mOhm maximum), which provides improved efficiency characteristics. The saturation current of 1.2 A exceeds the SPD73R-473M specification of 1.16 A. However, the continuous current rating of the substitute is 1.05 A, which is lower than the original part's 1.16 A rating.

The operating temperature range of the substitute is -40°C to 125°C, which is narrower than the original part's -40°C to 125°C specification at the lower bound. Applications requiring operation below -40°C must retain the SPD73R-473M.

Both parts carry AEC-Q200 automotive qualification where applicable and maintain equivalent regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the SRR0745A-470M replace the SPD73R-473M in all applications?

A: The SRR0745A-470M is electrically and mechanically compatible for applications operating within -40°C to 125°C. Applications requiring operation below -40°C must use the SPD73R-473M. The substitute's lower continuous current rating (1.05 A versus 1.16 A) must be evaluated against circuit requirements.

Q: What is the significance of the DC resistance difference?

A: The SRR0745A-470M has a maximum DC resistance of 210 mOhm compared to 360 mOhm for the SPD73R-473M. Lower DC resistance reduces power dissipation and heat generation, which is advantageous in most applications. This difference does not affect substitution eligibility.

Q: Are the package dimensions identical?

A: Yes. Both parts measure 7.30mm x 7.30mm in footprint. The SRR0745A-470M has a seated height of 4.70mm compared to 3.90mm for the SPD73R-473M. Verify clearance in applications with height constraints.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. The SRR0745A-470M carries AEC-Q200 automotive qualification.

Q: What is the inductance tolerance for both parts?

A: Both parts are specified with ±20% inductance tolerance at 1 kHz test frequency.