SD52-100-R Equivalent & Substitute Parts

Part Overview

The SD52-100-R is a 10 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.11 A continuous current with a DC resistance of 121.5 mOhm and operates across the temperature range of -40°C to 125°C. The part is RoHS compliant and currently active in production with 4900 pieces available in inventory.

Substitute parts are identified when design requirements allow tolerance in inductance value, current rating, or DC resistance while maintaining core electrical and mechanical compatibility. The SD52-100-R operates at 100 kHz inductance test frequency and is packaged in a nonstandard 5.20mm × 5.20mm surface mount form factor with a maximum seated height of 2.00mm.

Substiute Parts

SD52-100-R

Eaton - Electronics DivisionIn Stock: 4919SD52-100-R Datasheet

Current PartRFQ

SRU5018-100Y

Bourns Inc.In Stock: 16823SRU5018-100Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD52-100-R is determined by the following criteria:

Core Electrical Parameters: Inductance value must remain 10 µH. Current rating must equal or exceed 1.11 A to support the same load conditions. DC resistance must be evaluated against circuit requirements; lower DCR values reduce power dissipation.

Mechanical Compatibility: All substitute parts must maintain surface mount configuration with identical package footprint (5.20mm × 5.20mm) and maximum seated height of 2.00mm to ensure PCB assembly compatibility without design modification.

Material and Construction: Ferrite core material with shielding is required to maintain electromagnetic performance and minimize coupling to adjacent components.

Environmental and Compliance: Operating temperature range must span -40°C to 125°C. RoHS compliance status must be verified for regulatory requirements.

The SRU5018-100Y from Bourns Inc. meets these substitution criteria with equivalent inductance, higher current rating (1.25 A), lower DC resistance (65 mOhm), identical core material, shielding, mounting type, and package dimensions.

Parameter Comparison

Engineering Selection Recommendations

SD52-100-R Selection Criteria: Choose the SD52-100-R when the design requires the specified 121.5 mOhm DC resistance and 1.11 A saturation current. This part is RoHS compliant and suitable for applications requiring strict adherence to Eaton component specifications. The ±20% inductance tolerance provides tighter control for precision circuits.

SRU5018-100Y Selection Criteria: The SRU5018-100Y from Bourns Inc. is suitable as a substitute when the application can tolerate the ±30% inductance tolerance and benefits from the lower 65 mOhm DC resistance, which reduces power dissipation by approximately 46% compared to the SD52-100-R. The higher 1.25 A current rating provides additional design margin. The SRU5018-100Y is ROHS3 compliant and carries REACH Unaffected status, meeting current regulatory requirements.

Both parts share identical package footprint, operating temperature range, shielding configuration, and core material. Selection between these parts depends on tolerance requirements, power dissipation constraints, and supplier availability.

Frequently Asked Questions (FAQ)

Q: Can the SRU5018-100Y directly replace the SD52-100-R without PCB modification?

A: Yes. Both parts have identical package dimensions (5.20mm × 5.20mm × 2.00mm maximum height) and surface mount configuration. No PCB layout changes are required for physical substitution.

Q: What is the impact of the ±30% inductance tolerance on the SRU5018-100Y compared to the ±20% tolerance of the SD52-100-R?

A: The SRU5018-100Y has a wider tolerance band. In applications where inductance value is critical to circuit performance, the tighter ±20% tolerance of the SD52-100-R may be preferred. For applications with tolerance margins, the SRU5018-100Y is acceptable.

Q: Why is the DC resistance of the SRU5018-100Y significantly lower than the SD52-100-R?

A: The SRU5018-100Y exhibits 65 mOhm DC resistance compared to 121.5 mOhm for the SD52-100-R. This difference reflects different winding designs and wire gauges. Lower DC resistance reduces I²R power dissipation in the inductor, which may be advantageous in high-current applications.

Q: Is the saturation current difference between these parts significant?

A: The SD52-100-R has a saturation current of 1.11 A, while the SRU5018-100Y saturates at 1.05 A. For applications operating at or near 1.11 A, the SD52-100-R provides additional margin before saturation occurs. The SRU5018-100Y is suitable for applications operating below 1.05 A.

Q: Are both parts compliant with current environmental regulations?

A: Yes. The SD52-100-R is RoHS compliant. The SRU5018-100Y is ROHS3 compliant and REACH Unaffected, meeting current and anticipated regulatory requirements.

Q: What is the difference in Q factor between these inductors?

A: The SD52-100-R does not provide Q factor data. The SRU5018-100Y specifies Q of 12 at 2.52 MHz. Q factor is not a substitution criterion for this comparison.

Q: Can these parts be used interchangeably in all applications?

A: Interchangeability depends on specific circuit requirements. Both parts are suitable for applications requiring 10 µH inductance in a 5.20mm × 5.20mm surface mount package. Circuit simulation or testing is necessary to confirm performance when tolerance, DC resistance, or saturation current differences are critical to design function.