SPD125-223M Equivalent & Substitute Parts

Part Overview

The SPD125-223M is a 22 µH shielded inductor manufactured by API Delevan Inc., rated for 2.8 A with a maximum DC resistance of 75mOhm. This surface mount component features a ferrite core and operates across the temperature range of -55°C to 125°C. The part is currently classified as obsolete, making identification of equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

SPD125-223M

API Delevan Inc.In Stock: 1116SPD125-223M Datasheet

Current PartRFQ

DR125-220-R

Eaton - Electronics DivisionIn Stock: 3087DR125-220-R Datasheet

DirectRFQ

SRR1206-220ML

Bourns Inc.In Stock: 1687SRR1206-220ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD125-223M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 22 µH (exact match required)
• Tolerance: ±20% (matching specification)
• Shielding: Shielded configuration
• Core material: Ferrite
• Mounting type: Surface Mount
• Package classification: Nonstandard

Secondary Compatibility Factors:

• Current rating: Substitute must meet or exceed 2.8 A minimum
• DC resistance: Lower DCR values are acceptable; higher values require circuit validation
• Operating temperature range: Minimum -40°C to 125°C acceptable for most applications
• Physical dimensions: Footprint compatibility within 12.00mm to 12.70mm length/width range

The two identified substitutes—DR125-220-R and SRR1206-220ML—satisfy the primary matching criteria and maintain functional equivalence within the specified electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

DR125-220-R (Eaton - Electronics Division): This substitute provides superior electrical performance with a current rating of 3.7 A and saturation current of 4.71 A, exceeding the SPD125-223M requirements. The DC resistance of 39.6mOhm is significantly lower, reducing power dissipation. The part is ROHS3 compliant and maintains active product status, ensuring long-term availability. Physical dimensions (12.50mm x 12.50mm x 6.00mm) are compatible with the original footprint. This option is suitable for applications requiring enhanced thermal performance and regulatory compliance.

SRR1206-220ML (Bourns Inc.): This substitute meets the minimum current requirement at 2.3 A with saturation current of 3.8 A. The DC resistance of 62mOhm Max is lower than the original specification, providing improved efficiency. The part is ROHS3 compliant and maintains active product status. Physical dimensions (12.70mm x 12.70mm x 6.50mm) represent a minor increase in footprint and height. This option provides a balanced alternative with established supply chain availability.

Both substitutes maintain the 22 µH inductance, ±20% tolerance, shielded ferrite core configuration, and surface mount characteristics of the original part. Selection between these options depends on specific circuit requirements regarding current headroom, thermal dissipation, and physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can the DR125-220-R or SRR1206-220ML be used as direct replacements for the SPD125-223M?

A: Both parts satisfy the core electrical specifications: 22 µH inductance, ±20% tolerance, shielded ferrite core, and surface mount configuration. The DR125-220-R provides higher current capacity (3.7 A vs. 2.8 A) and lower DCR (39.6mOhm vs. 75mOhm). The SRR1206-220ML operates at 2.3 A with 62mOhm DCR. Substitution is valid when circuit design accommodates the physical dimension differences and the lower operating temperature minimum (-40°C vs. -55°C).

Q: What are the physical dimension differences between these parts?

A: The SPD125-223M measures 12.00mm x 12.00mm with 6.00mm maximum height. The DR125-220-R is 12.50mm x 12.50mm with 6.00mm height. The SRR1206-220ML is 12.70mm x 12.70mm with 6.50mm maximum height. These differences require PCB layout verification to confirm footprint compatibility.

Q: How do the DC resistance values affect circuit performance?

A: The SPD125-223M specifies 75mOhm maximum DCR. The DR125-220-R provides 39.6mOhm, and the SRR1206-220ML provides 62mOhm maximum. Lower DCR values reduce resistive losses and heat generation. In high-current applications, the improved DCR of the substitutes results in lower power dissipation and improved efficiency.

Q: Are there compliance differences between the original and substitute parts?

A: The SPD125-223M is RoHS non-compliant. Both DR125-220-R and SRR1206-220ML are ROHS3 compliant. If regulatory compliance is required, either substitute satisfies current environmental standards. Both parts are REACH unaffected and classified as EAR99 for export control purposes.

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

A: The SPD125-223M inductance is tested at 1 kHz, while the DR125-220-R is tested at 100 kHz. The SRR1206-220ML uses 1 kHz testing. Test frequency can affect measured inductance values due to core material characteristics. For applications operating at frequencies significantly different from the test frequency, frequency-dependent behavior should be evaluated through component datasheets.

Q: Can the SRR1206-220ML be used in applications requiring the full -55°C to 125°C temperature range?

A: The SRR1206-220ML operates from -40°C to 125°C, which does not cover the full lower temperature range of the original SPD125-223M (-55°C). If operation below -40°C is required, the SRR1206-220ML is not suitable. The DR125-220-R also operates from -40°C to 125°C. For full temperature range coverage, alternative components must be evaluated.