SPD73-223M Equivalent & Substitute Parts

Part Overview

The SPD73-223M is a 22 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.1 A with a maximum DC resistance of 190 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across the temperature range of -55°C to 125°C and is mounted as a surface mount device in a nonstandard package configuration.

Substiute Parts

SPD73-223M

API Delevan Inc.In Stock: 853SPD73-223M Datasheet

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SCRH73-220

Signal TransformerIn Stock: 983SCRH73-220 Datasheet

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SCRH73B-220

Signal TransformerIn Stock: 830SCRH73B-220 Datasheet

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SRR0745A-220M

Bourns Inc.In Stock: 6287SRR0745A-220M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD73-223M is determined by the following critical parameters: inductance value (22 µH), tolerance (±20%), shielding requirement (shielded), mounting type (surface mount), and inductance test frequency (1 kHz). All identified substitute parts meet these core electrical specifications. Current rating and DC resistance are secondary selection criteria; substitutes with equal or higher current ratings and equal or lower DC resistance values provide direct functional equivalence or performance improvement. Operating temperature range and RoHS compliance status are additional factors for design validation and regulatory conformance.

Parameter Comparison

Engineering Selection Recommendations

SCRH73-220 and SCRH73B-220 (Signal Transformer) provide direct electrical equivalence to the SPD73-223M with matching inductance, tolerance, current rating, and DC resistance specifications. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), supporting modern procurement and regulatory requirements. The primary distinction between these two Signal Transformer options is series designation; both are functionally interchangeable for the SPD73-223M application.

SRR0745A-220M (Bourns Inc.) offers enhanced performance characteristics with 1.65 A current rating and 96 mOhm maximum DC resistance, representing a 50% improvement in current capacity and 49% reduction in resistance compared to the original part. This substitute is suitable for applications requiring higher current handling or lower power dissipation. The SRR0745A-220M carries AEC-Q200 automotive qualification and ROHS3 compliance. Operating temperature range is limited to -40°C to 125°C, which is narrower than the original SPD73-223M specification by 15°C at the lower bound.

For applications requiring the full -55°C to 125°C operating range of the original part, SCRH73-220 or SCRH73B-220 are the appropriate selections. For applications operating within -40°C to 125°C with higher current or lower resistance requirements, SRR0745A-220M is the preferred substitute.

Frequently Asked Questions (FAQ)

Q: Can SCRH73-220 and SCRH73B-220 be used interchangeably with SPD73-223M?

A: Yes. Both parts meet all critical electrical parameters: 22 µH inductance, ±20% tolerance, 1.07 A current rating (within 3% of the original 1.1 A), 190 mOhm maximum DC resistance, shielded configuration, and 1 kHz test frequency. Both are active products with ROHS3 compliance, providing superior procurement availability compared to the obsolete SPD73-223M.

Q: What is the difference between SCRH73-220 and SCRH73B-220?

A: Both parts are manufactured by Signal Transformer with identical electrical specifications and physical dimensions. The difference is series designation (SCRH73 versus SCRH73B). From an engineering standpoint, they are functionally equivalent for the SPD73-223M application.

Q: When should SRR0745A-220M be selected instead of the Signal Transformer options?

A: SRR0745A-220M is selected when the application requires higher current capacity (1.65 A versus 1.07 A) or lower DC resistance (96 mOhm versus 190 mOhm). This substitute reduces power dissipation and provides additional current margin. The trade-off is a narrower operating temperature range (-40°C to 125°C versus -55°C to 125°C).

Q: Are there physical dimension differences between these substitutes?

A: Yes. SPD73-223M and SRR0745A-220M share identical length and width (0.287" × 0.287" or 7.30mm × 7.30mm), but differ in height: SPD73-223M is 0.154" (3.90mm) while SRR0745A-220M is 0.185" (4.70mm). SCRH73-220 and SCRH73B-220 have slightly larger footprints (0.307" × 0.307" or 7.80mm × 7.80mm) with reduced height (0.138" or 4.60mm). PCB layout verification is required when substituting between these options.

Q: What is the RoHS compliance status of these parts?

A: SPD73-223M is RoHS non-compliant. All three substitute parts (SCRH73-220, SCRH73B-220, and SRR0745A-220M) are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and procurement.