SPD73R-224M Equivalent & Substitute Parts

Part Overview

The SPD73R-224M is a 220 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 570 mA continuous current with a maximum DC resistance of 1.65Ohm. This component is designed for surface mount applications in nonstandard package configurations and operates across the industrial temperature range of -55°C to 125°C. The part maintains active product status with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within relaxed electrical parameters while maintaining functional equivalence in shielded inductor applications.

Substiute Parts

SPD73R-224M

API Delevan Inc.In Stock: 965SPD73R-224M Datasheet

Current PartRFQ

SRR0745A-221M

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD73R-224M is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 220 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance band)
• Shielding type: Shielded (electromagnetic containment requirement)
• Core material: Ferrite (magnetic performance characteristic)
• Mounting type: Surface Mount (assembly compatibility)
• Package footprint: 7.30mm x 7.30mm (PCB layout constraint)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

Secondary Compatibility Parameters:

• Current rating: Substitute must support minimum 420 mA (relaxed from 570 mA primary rating)
• DC resistance: Substitute maximum 950mOhm acceptable (relaxed from 1.65Ohm primary rating)
• Operating temperature: Minimum -40°C to 125°C acceptable (relaxed from -55°C to 125°C primary range)
• Height seated: Maximum 4.70mm acceptable (relaxed from 3.90mm primary height)

The SRR0745A-221M from Bourns Inc. qualifies as a direct substitute based on matching inductance, tolerance, shielding, core material, mounting type, and footprint dimensions, while operating within acceptable relaxed electrical and thermal parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (SPD73R-224M): Select the SPD73R-224M when circuit design requires the full 570 mA current rating, extended low-temperature operation to -55°C, or when the 3.90mm maximum height is a critical PCB assembly constraint. This part maintains active product status with ROHS3 compliance and AEC-Q200 certification is not required.

Substitute Part Selection (SRR0745A-221M): Select the SRR0745A-221M when circuit operation permits 420 mA maximum current rating, operating temperature minimum of -40°C is acceptable, and the increased height of 4.70mm does not conflict with PCB assembly requirements. This substitute offers improved DC resistance performance (950mOhm versus 1.65Ohm) and maintains active product status with ROHS3 compliance and AEC-Q200 automotive qualification.

Both parts are ROHS3 compliant, carry unlimited moisture sensitivity rating, and are classified as REACH Unaffected with identical ECCN and HTSUS codes, confirming regulatory equivalence for component selection purposes.

Frequently Asked Questions (FAQ)

Q: Can the SRR0745A-221M replace the SPD73R-224M in all applications?

A: Substitution is valid only when circuit design permits operation at 420 mA maximum current (versus 570 mA primary rating), minimum operating temperature of -40°C (versus -55°C primary range), and when the increased component height of 4.70mm does not create PCB assembly conflicts. Verify these parameters against your specific circuit requirements before substitution.

Q: What is the impact of the lower current rating on the substitute part?

A: The SRR0745A-221M is rated for 420 mA continuous current with 500 mA saturation current, compared to the SPD73R-224M at 570 mA continuous. If your circuit operates below 420 mA, the substitute performs identically. If circuit current exceeds 420 mA, the substitute will saturate prematurely and is not suitable.

Q: Does the improved DC resistance of the substitute part affect circuit performance?

A: The SRR0745A-221M exhibits lower DC resistance (950mOhm maximum versus 1.65Ohm maximum), which reduces resistive losses and heat generation. This represents an improvement over the primary part and is beneficial for power efficiency in most applications.

Q: Are there height clearance considerations for PCB assembly?

A: The SRR0745A-221M seated height is 4.70mm maximum, compared to 3.90mm for the SPD73R-224M. Verify that your PCB layout and component placement allow for the additional 0.80mm height before substitution.

Q: Do both parts meet the same regulatory and compliance standards?

A: Both parts are ROHS3 compliant, carry MSL Level 1 (unlimited moisture sensitivity), and are REACH Unaffected. The SRR0745A-221M additionally carries AEC-Q200 automotive qualification. Both parts share identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications.

Q: What is the footprint compatibility between these parts?

A: Both parts share identical package footprints of 7.30mm x 7.30mm, ensuring direct PCB layout compatibility. No redesign of component placement is required for footprint accommodation.