SDS680R-152M Equivalent & Substitute Parts

Part Overview

The SDS680R-152M is a 1.5 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 2.8 A continuous current with a maximum DC resistance of 45 mOhm. This surface mount component is designed for applications requiring compact, shielded inductance in the microhenry range with controlled impedance characteristics. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent parts are identified based on matching electrical specifications, mechanical dimensions, and environmental operating ranges to ensure direct functional substitution in circuit designs.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Inductance	1.5	µH	Critical - must match exactly
Current Rating	2.8	A	Critical - minimum acceptable rating
DC Resistance (DCR)	45	mOhm Max	Critical - affects power dissipation
Tolerance	±20%	%	Critical - defines accuracy class
Shielding	Shielded	-	Critical - EMI containment requirement
Core Material	Ferrite	-	Important - affects frequency response
Operating Temperature	-40 to 85	°C	Important - thermal environment compatibility
Mounting Type	Surface Mount	-	Critical - PCB assembly requirement
Package Dimensions	6.60 x 4.45 x 2.92	mm	Critical - physical fit on PCB
RoHS3 Compliance	Compliant	-	Important - regulatory requirement

Substitute Part Grouping Explanation

Substitution eligibility for the SDS680R-152M is determined by strict equivalence across the following parameters:

Electrical Equivalence Requirements:

Inductance value: 1.5 µH (exact match)
Current rating: minimum 2.8 A
DC resistance: maximum 45 mOhm
Tolerance: ±20%
Shielding: shielded configuration required

Mechanical Equivalence Requirements:

Mounting type: surface mount only
Package dimensions: 6.60 mm L × 4.45 mm W × 2.92 mm H (maximum seated height)
Core type: drum core wirewound construction

Environmental & Compliance Requirements:

Operating temperature range: minimum -40°C to 85°C
RoHS3 compliance: required
Moisture sensitivity level: MSL 1 (unlimited)

The substitute part 74451015 (Würth Elektronik WE-PD3 series) meets all critical electrical and mechanical parameters for direct substitution in the SDS680R-152M application.

Parameter Comparison

Parameter	SDS680R-152M (API Delevan)	74451015 (Würth Elektronik)	Match Status
Inductance	1.5 µH	1.5 µH	Exact Match
Current Rating	2.8 A	2.8 A	Exact Match
DC Resistance (DCR)	45 mOhm Max	45 mOhm Max	Exact Match
Tolerance	±20%	±20%	Exact Match
Shielding	Shielded	Shielded	Exact Match
Core Type	Drum Core, Wirewound	Drum Core, Wirewound	Exact Match
Mounting Type	Surface Mount	Surface Mount	Exact Match
Package Dimensions	6.60 x 4.45 x 2.92 mm	6.60 x 4.45 x 2.92 mm	Exact Match
Operating Temperature	-40 to 85°C	-40 to 125°C	Compatible (substitute exceeds range)
Frequency - Self Resonant	125 MHz	80 MHz	Substitute Lower
RoHS3 Compliance	Compliant	Compliant	Exact Match
MSL Rating	1 (Unlimited)	1 (Unlimited)	Exact Match
Product Status	Active	Active	Exact Match

Engineering Selection Recommendations

Primary Selection: SDS680R-152M

The SDS680R-152M remains the preferred component when available. It is manufactured by API Delevan Inc., maintains Active product status, and carries full RoHS3 compliance with MSL 1 rating. The part is currently in stock with 694 units available.

Substitute Selection: 74451015

The Würth Elektronik 74451015 (WE-PD3 series) is a qualified equivalent for direct substitution. This part satisfies all critical electrical parameters (1.5 µH inductance, 2.8 A current rating, 45 mOhm DCR, ±20% tolerance) and maintains identical mechanical dimensions (6.60 × 4.45 × 2.92 mm). Both components feature shielded drum core wirewound construction with surface mount packaging.

Compliance & Availability:

Both parts are RoHS3 compliant, REACH unaffected, and classified under EAR99 export control. The 74451015 offers extended operating temperature range (-40 to 125°C versus -40 to 85°C), providing additional thermal margin in applications approaching the upper temperature limit. The substitute part is currently in stock with 1,245 units available, offering superior supply continuity.

Functional Differences:

The 74451015 exhibits a lower self-resonant frequency (80 MHz versus 125 MHz). This difference is relevant only in applications where the inductor operates near or above its self-resonant frequency. For standard DC-biased or low-frequency AC applications, this parameter does not affect functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the 74451015 be used as a direct replacement for the SDS680R-152M on existing PCBs?

A: Yes. Both components share identical mechanical dimensions (6.60 × 4.45 × 2.92 mm) and surface mount packaging. No PCB layout modifications are required. The footprint and solder pad pattern are compatible.

Q: What is the significance of the different self-resonant frequencies (125 MHz vs. 80 MHz)?

A: Self-resonant frequency defines the frequency at which the inductor's parasitic capacitance begins to dominate its behavior. For applications operating below 50 MHz, this difference is negligible. Applications operating in the 80–125 MHz range should verify that the lower self-resonant frequency of the 74451015 does not affect circuit performance. Standard power supply and filtering applications are unaffected.

Q: Are both parts suitable for high-reliability applications?

A: Both the SDS680R-152M and 74451015 are Active products with RoHS3 compliance and MSL 1 (unlimited moisture sensitivity). Both are suitable for industrial and commercial applications. Specific reliability requirements (such as AEC-Q qualification or military specifications) should be verified against application requirements, as these parameters are not provided in the component data.

Q: Why does the 74451015 have a higher maximum operating temperature (125°C vs. 85°C)?

A: The extended temperature range reflects the thermal design of the Würth Elektronik component. This provides additional operational margin in applications with elevated ambient temperatures or self-heating from current flow. The SDS680R-152M's 85°C maximum is sufficient for standard industrial temperature environments (-40 to 85°C).

Q: What is the current saturation specification, and why is it listed for only one part?

A: Current saturation (Isat) indicates the current level at which the inductor's core begins to saturate, causing inductance to degrade. The 74451015 specifies Isat at 1.13 A. The SDS680R-152M does not provide this specification in the available data. For applications requiring saturation margin analysis, the 74451015's saturation specification should be evaluated against circuit peak current requirements.

Q: Can these inductors be used in high-frequency switching applications?

A: Both components are suitable for switching power supply applications within their specified frequency ranges. The SDS680R-152M's higher self-resonant frequency (125 MHz) provides better high-frequency performance. For applications operating above 80 MHz, the SDS680R-152M is preferred. For standard switching frequencies (100 kHz to 10 MHz), both parts perform equivalently.

Q: Are there any supply chain considerations when selecting between these parts?

A: The 74451015 currently has higher inventory availability (1,245 units versus 694 units for the SDS680R-152M). For applications with extended lead time requirements or high-volume production, the Würth Elektronik part may offer supply continuity advantages. Both parts are Active products with established manufacturing processes.

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