SPD125R-563M Equivalent & Substitute Parts

Part Overview

The SPD125R-563M is a 56 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.6 A continuous current with a maximum DC resistance of 135 mOhm. This Surface Mount Device (SMD) component is designed for applications requiring fixed inductance with ferrite core shielding in a nonstandard 12.00mm x 12.00mm x 6.00mm package. The part is currently active in production and widely available. Identifying equivalent or substitute inductors is essential when the primary part becomes unavailable, when design optimization requires different electrical characteristics, or when sourcing from alternative manufacturers is necessary for supply chain resilience.

Substiute Parts

SPD125R-563M

API Delevan Inc.In Stock: 652SPD125R-563M Datasheet

Current PartRFQ

SRR1206-560YL

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Inductors can be substituted when substitute parts maintain electrical equivalence within acceptable system tolerances. The primary electrical parameters determining substitution validity for the SPD125R-563M are:

• Inductance Value: Must be 56 µH (matching the original specification)
• Current Rating: Must support at least 1.6 A continuous current to maintain thermal and performance margins
• DC Resistance: Lower or equal resistance maximizes efficiency; higher resistance increases heating and power loss
• Core Type and Shielding: Ferrite core with shielding maintains electromagnetic containment and noise characteristics
• Package Dimensions: Surface mount form factor with compatible footprint ensures assembly compatibility
• Tolerance: ±20% or tighter ensures inductance value remains within acceptable system range
• Operating Temperature Range: Must extend from at least -55°C to 125°C for environmental compatibility
• Compliance: RoHS3 compliance and REACH unaffected status ensure regulatory alignment

The SRR1206-560YL from Bourns Inc. meets these substitution criteria with comparable electrical characteristics and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the SPD125R-563M and SRR1206-560YL are active production components with ROHS3 compliance and REACH unaffected status, ensuring continued availability and regulatory alignment. The SRR1206-560YL offers a tighter inductance tolerance (±15% versus ±20%), which benefits applications requiring more precise inductance values. The SPD125R-563M provides a 150 mA current rating advantage and lower DC resistance (135 mOhm versus 155 mOhm), resulting in reduced power dissipation for high-current applications.

Design considerations include package size differences: the SRR1206-560YL is slightly larger at 12.70mm x 12.70mm x 6.50mm compared to 12.00mm x 12.00mm x 6.00mm for the SPD125R-563M. The SPD125R-563M supports a wider operating temperature range (-55°C to 125°C), while the SRR1206-560YL operates from -40°C to 125°C. Application requirements determine which device best suits system needs.

Frequently Asked Questions (FAQ)

Q: Can the SRR1206-560YL directly replace the SPD125R-563M in existing designs? A: The SRR1206-560YL provides equivalent 56 µH inductance with compatible shielded ferrite core construction and surface mount packaging. However, the larger package footprint (12.70mm x 12.70mm versus 12.00mm x 12.00mm) requires PCB layout validation. The 1.45 A current rating is 150 mA lower than the original specification, necessitating thermal analysis for applications operating near maximum current. The slightly higher DC resistance (155 mOhm versus 135 mOhm) increases power dissipation by approximately 20 mW per ampere squared.

Q: What are the key differences between these inductors? A: Both inductors share identical 56 µH inductance and ferrite shielded drum core construction. The SPD125R-563M excels in high-current and low-loss applications with 1.6 A rating and 135 mOhm maximum resistance. The SRR1206-560YL provides tighter inductance tolerance (±15% versus ±20%) and higher saturation current (2.5 A versus 1.6 A), benefiting designs requiring margin against saturation. Package dimensions and temperature ranges differ as detailed in the parameter comparison table.

Q: Are both parts compliant with current regulations? A: Both the SPD125R-563M and SRR1206-560YL are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for commercial and industrial applications.

Q: How does the inductance tolerance affect component selection? A: The SRR1206-560YL's ±15% tolerance is tighter than the SPD125R-563M's ±20% tolerance. This tighter tolerance reduces the inductance variation across the manufacturing population, benefiting circuits with stringent frequency response or impedance matching requirements. The SPD125R-563M's wider tolerance requires larger design margins in filter or tuning applications.

Q: What considerations apply to thermal design when substituting? A: The SRR1206-560YL's higher DC resistance (155 mOhm versus 135 mOhm) generates additional heat at equivalent current levels. For applications running continuously at 1.6 A, the substitute inductor dissipates approximately 43.2 mW additional power compared to the original part. Thermal management evaluation is necessary for high-frequency or high-current applications approaching the 1.45 A rating of the substitute.