SPD125-563M Equivalent & Substitute Parts

Part Overview

The SPD125-563M is a 56 µH shielded inductor manufactured by API Delevan Inc., rated for 1.6 A with a maximum DC resistance of 135 mOhm. This surface mount component features a ferrite core and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of suitable equivalent components essential for ongoing design support and procurement continuity.

Substiute Parts

SPD125-563M

API Delevan Inc.In Stock: 1028SPD125-563M Datasheet

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SRR1206-560YL

Bourns Inc.In Stock: 2601SRR1206-560YL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The SRR1206-560YL qualifies as a substitute for the SPD125-563M based on the following critical parameters:

• Inductance Match: Both components provide 56 µH inductance at 1 kHz test frequency
• Shielding: Both are shielded designs, maintaining electromagnetic isolation requirements
• Core Material: Both utilize ferrite core construction
• Mounting Type: Both are surface mount components
• Physical Compatibility: Dimensional footprint is comparable (12.70mm x 12.70mm vs. 12.00mm x 12.00mm), with acceptable height variation (6.50mm vs. 6.00mm)
• Current Handling: The SRR1206-560YL rated current of 1.45 A is within acceptable tolerance of the 1.6 A requirement for most applications, with saturation current of 2.5 A providing additional margin

Parameter Comparison

Engineering Selection Recommendations

The SRR1206-560YL is an active product with ROHS3 compliance, providing regulatory advantage over the obsolete SPD125-563M. The substitute maintains identical inductance and shielding characteristics while offering improved tolerance (±15% vs. ±20%) and higher saturation current (2.5 A vs. 1.6 A).

The rated current differential of 0.15 A (1.45 A vs. 1.6 A) and DCR increase of 20 mOhm require circuit-level evaluation to confirm acceptability within thermal and loss budgets. The operating temperature range of the substitute is narrower at the lower end (-40°C vs. -55°C), which may be a limiting factor for applications requiring extended low-temperature operation.

Physical dimensions show a 0.70mm increase in length and width, with 0.50mm additional height. PCB layout verification is necessary to confirm mechanical fit within the existing footprint.

Frequently Asked Questions (FAQ)

Q: Can the SRR1206-560YL directly replace the SPD125-563M without circuit modification?

A: Direct replacement is possible if the application operates within the SRR1206-560YL's rated current of 1.45 A and does not require operation below -40°C. The slightly higher DCR (155 mOhm vs. 135 mOhm) and lower current rating require verification against thermal and loss specifications.

Q: What is the impact of the 20 mOhm increase in DC resistance?

A: The DCR increase results in proportionally higher resistive losses. At rated current, this translates to approximately 15% additional power dissipation. Thermal analysis is required to confirm the component remains within acceptable operating limits.

Q: Are there mechanical compatibility concerns with the larger footprint?

A: The SRR1206-560YL is 0.70mm larger in length and width, with 0.50mm additional height. PCB layout must be verified to ensure clearance from adjacent components and that the increased height does not violate assembly constraints.

Q: Does the SRR1206-560YL meet the same environmental specifications?

A: The substitute operates from -40°C to 125°C, compared to the original -55°C to 125°C. Applications requiring operation below -40°C cannot use this substitute. Both components are rated for unlimited moisture sensitivity (MSL 1).

Q: What is the advantage of the SRR1206-560YL's higher saturation current?

A: The 2.5 A saturation current (vs. 1.6 A for the original) provides additional margin against inductance degradation under transient overcurrent conditions, improving circuit robustness.

Q: Is RoHS compliance a requirement for this substitution?

A: The SRR1206-560YL is ROHS3 compliant, while the SPD125-563M is non-compliant. If RoHS compliance is mandated by design or regulatory requirements, the substitute is the appropriate choice.