SD52-680-R Equivalent & Substitute Parts

Part Overview

The SD52-680-R is a 68 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is designed for applications requiring fixed inductance with moderate current handling capability. The part is actively produced and RoHS compliant, making it suitable for modern electronic assemblies. Substitute parts may be required due to inventory constraints, supply chain considerations, or specific application requirements within the allowable parameter ranges.

Substiute Parts

SD52-680-R

Eaton - Electronics DivisionIn Stock: 1053SD52-680-R Datasheet

Current PartRFQ

SRU5018-680Y

Bourns Inc.In Stock: 5228SRU5018-680Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SD52-680-R with the SRU5018-680Y is based on the following alignment of critical electrical and mechanical parameters:

Matched Parameters:

• Inductance value: 68 µH (identical)
• Core type: Ferrite drum core, shielded (identical)
• Mounting: Surface mount (identical)
• Package footprint: 5.20 x 5.20 x 2.00 mm (identical)
• Operating temperature range: -40 to 125°C (identical)
• Inductance test frequency: 100 kHz (identical)
• RoHS compliance: Both parts meet environmental standards

Allowable Parameter Variations:

• Current rating: SD52-680-R rated at 470 mA; SRU5018-680Y rated at 370 mA (substitute has lower rating)
• DC resistance: SD52-680-R 682.9 mOhm; SRU5018-680Y 480 mOhm (substitute has lower resistance)
• Inductance tolerance: SD52-680-R ±20%; SRU5018-680Y ±30% (substitute has wider tolerance)
• Saturation current: SD52-680-R 420 mA; SRU5018-680Y 360 mA (substitute has lower saturation point)

The SRU5018-680Y is a valid substitute when application current requirements do not exceed 370 mA and the wider inductance tolerance is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SD52-680-R

The SD52-680-R remains the primary selection when application requirements include current levels up to 470 mA and tighter inductance tolerance of ±20% is required. This part is actively manufactured by Eaton and maintains full RoHS compliance.

Substitute Part: SRU5018-680Y

The SRU5018-680Y (Bourns Inc.) is an acceptable substitute when the following conditions are met:

• Maximum operating current does not exceed 370 mA
• Inductance tolerance of ±30% is acceptable for the application
• Saturation current margin of 360 mA is sufficient
• Lower DC resistance (480 mOhm versus 682.9 mOhm) is compatible with circuit design
• ROHS3 compliance meets or exceeds project environmental requirements

Both parts share identical physical footprints and thermal operating ranges, enabling direct PCB layout compatibility. The SRU5018-680Y offers higher inventory availability (5131 pieces in stock versus 995 pieces for the SD52-680-R).

Frequently Asked Questions (FAQ)

Q: Can the SRU5018-680Y be used as a direct replacement for the SD52-680-R in all applications?

A: No. The SRU5018-680Y has a lower current rating (370 mA versus 470 mA) and lower saturation current (360 mA versus 420 mA). Substitution is valid only when circuit current requirements remain below 370 mA continuous operation.

Q: What is the impact of the different DC resistance values?

A: The SRU5018-680Y has lower DC resistance (480 mOhm versus 682.9 mOhm). This results in lower resistive losses and reduced heat generation at equivalent current levels. Applications sensitive to resistive losses may benefit from this characteristic, provided current ratings are not exceeded.

Q: Does the wider inductance tolerance of the SRU5018-680Y affect circuit performance?

A: The SRU5018-680Y has ±30% tolerance compared to the SD52-680-R's ±20% tolerance. Applications with tight inductance specifications or resonant frequency requirements may require the tighter tolerance of the primary part. Verify tolerance requirements against circuit design specifications.

Q: Are the physical packages identical?

A: Yes. Both parts share identical surface mount package dimensions of 5.20 x 5.20 x 2.00 mm (L x W x H). PCB footprints and assembly processes are directly compatible.

Q: What are the compliance differences between these parts?

A: The SD52-680-R is RoHS Compliant. The SRU5018-680Y is ROHS3 Compliant, which represents a more recent revision of the RoHS standard. Both meet current environmental regulations for electronic component manufacturing and use.

Q: Can these parts be used interchangeably in high-frequency applications?

A: The SRU5018-680Y provides additional frequency performance data (Q @ 2.52 MHz = 12; Self Resonant Frequency = 16 MHz). The SD52-680-R does not specify these parameters. For applications operating near or above 10 MHz, verify frequency response requirements against available data before substitution.