SPD73-224M

Part Overview

The SPD73-224M is a 220 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 374 mA with a maximum DC resistance of 1.65Ω. This part operates across the temperature range of -55°C to 125°C and is mounted via surface mount technology in a nonstandard 7.30mm × 7.30mm package. The product is currently obsolete, necessitating identification of equivalent substitute parts that maintain functional compatibility while meeting current operational requirements.

Substiute Parts

SPD73-224M

API Delevan Inc.In Stock: 1210SPD73-224M Datasheet

Current PartRFQ

CDRH73NP-221MC-B

Sumida America Components Inc.In Stock: 701CDRH73NP-221MC-B Datasheet

SimilarRFQ

SRR0745A-221M

Bourns Inc.In Stock: 2150SRR0745A-221M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPD73-224M must satisfy the following electrical and mechanical criteria:

Electrical Parameters:

• Inductance: 220 µH (matching value)
• Core Material: Ferrite
• Shielding: Shielded configuration
• Inductance Tolerance: ±20%
• Inductance Test Frequency: 1 kHz
• Mounting Type: Surface Mount

Mechanical Parameters:

• Package Footprint: 7.30mm × 7.30mm (X-Y dimensions)
• Height Constraint: Must accommodate PCB layout requirements

Current and Resistance Compatibility:

• Current Rating: Must equal or exceed 374 mA
• DC Resistance: Must equal or be lower than 1.65Ω Max (lower DCR improves efficiency)

Environmental Compliance:

• Operating Temperature: Must support the required range (-55°C to 125°C, or higher)

Two substitute parts meet these criteria: the CDRH73NP-221MC-B from Sumida America Components Inc. and the SRR0745A-221M from Bourns Inc. Both maintain the 220 µH inductance value, ferrite core construction, shielded design, and 7.30mm × 7.30mm footprint required for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

CDRH73NP-221MC-B (Sumida America Components Inc.): This substitute maintains electrical parity with the original SPD73-224M across inductance, tolerance, and DC resistance specifications. The current rating of 350 mA is 24 mA below the main part's specification. This part is active in production and ROHS3 compliant. The reduced package height of 3.40mm provides improved PCB layout flexibility. However, the operating temperature range is limited to -40°C to 100°C, which is narrower than the main part's range.

SRR0745A-221M (Bourns Inc.): This substitute provides superior electrical performance with a current rating of 420 mA and significantly lower DC resistance of 950mΩ compared to the main part's 1.65Ω. The operating temperature range extends to -40°C to 125°C, aligning with the upper temperature specification of the main part. This part carries AEC-Q200 automotive qualification and is ROHS3 compliant. The increased package height of 4.70mm requires clearance verification in the target application.

Frequently Asked Questions (FAQ)

Q: Can CDRH73NP-221MC-B directly replace SPD73-224M? A: The CDRH73NP-221MC-B shares identical inductance (220 µH), tolerance (±20%), DC resistance (1.65Ω Max), core material (ferrite), shielding, and footprint (7.30mm × 7.30mm). The primary design consideration is the 350 mA current rating, which is 24 mA lower than the main part. Applications operating below 350 mA are compatible. The operating temperature range (-40°C to 100°C) is narrower than the main part's specification.

Q: Can SRR0745A-221M directly replace SPD73-224M? A: Yes, the SRR0745A-221M meets all electrical substitution criteria with matching inductance (220 µH), tolerance (±20%), core material (ferrite), and shielding. Superior electrical performance is provided through 420 mA current rating and 950mΩ DC resistance. The operating temperature range of -40°C to 125°C covers the main part's full upper temperature specification. PCB layout must accommodate the increased height of 4.70mm.

Q: What is the impact of DC resistance differences? A: Lower DC resistance reduces power dissipation and heat generation. The SRR0745A-221M's 950mΩ resistance is significantly lower than both the main part and the CDRH73NP-221MC-B at 1.65Ω. This reduction improves efficiency in current-carrying applications but is inconsequential in applications with minimal DC current flow.

Q: Are temperature ranges critical for substitution? A: Temperature compatibility depends on the application's operational requirements. The CDRH73NP-221MC-B (-40°C to 100°C) is limited compared to the main part's -55°C to 125°C range and is unsuitable for applications requiring full temperature coverage. The SRR0745A-221M (-40°C to 125°C) covers the upper temperature requirement but not the lower -55°C specification.

Q: What is the significance of the footprint dimensions? A: All three parts share identical X-Y footprint dimensions of 7.30mm × 7.30mm, ensuring compatibility with existing PCB pad layouts. Height variations (3.40mm, 3.90mm, and 4.70mm) must be evaluated for vertical clearance in the target assembly.

Q: Does RoHS compliance affect substitution decisions? A: The main part SPD73-224M is RoHS non-compliant, whereas both substitute parts are ROHS3 compliant. Regulatory requirements for the end application determine whether RoHS compliance is mandatory.