SD52-470-R Equivalent & Substitute Parts

Part Overview

The SD52-470-R is a 47 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 580 mA continuous current with a DC resistance of 446.5 mOhm and operates across the temperature range of -40°C to 125°C. The part is RoHS compliant and currently active in production with 1079 pieces available in inventory.

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter tolerances for this inductor category, particularly when the main part faces supply constraints or when alternative sourcing is required for procurement optimization.

Substiute Parts

SD52-470-R

Eaton - Electronics DivisionIn Stock: 1091SD52-470-R Datasheet

Current PartRFQ

SRU5018-470Y

Bourns Inc.In Stock: 3114SRU5018-470Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD52-470-R is determined by the following criteria:

Primary Electrical Parameters:

• Inductance value: 47 µH (exact match required)
• Core material: Ferrite shielded drum core (exact match required)
• Mounting type: Surface Mount (exact match required)

Secondary Electrical Parameters (Allowable Variance):

• Current rating: Substitute must support minimum 540 mA (≥93% of main part rating)
• DC resistance: Substitute must not exceed 330 mOhm (lower DCR acceptable)
• Saturation current: Substitute must support minimum 450 mA (≥90% of main part saturation)
• Inductance tolerance: ±30% acceptable for substitution purposes
• Operating temperature range: Must cover -40°C to 125°C minimum

Compliance & Packaging:

• RoHS compliance required (RoHS3 or equivalent)
• Tape & Reel packaging required
• Physical dimensions: 5.20 x 5.20 x 2.00 mm (exact match)
• Moisture Sensitivity Level: MSL 1 (Unlimited)

The SRU5018-470Y from Bourns Inc. meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

SD52-470-R (Eaton - Electronics Division):

• Primary selection when available from inventory
• Active product status with established supply chain
• RoHS compliant with standard compliance documentation
• Tighter inductance tolerance (±20%) suitable for precision applications

SRU5018-470Y (Bourns Inc.):

• Qualified substitute when SD52-470-R availability is constrained
• Active product status with higher inventory availability (3100 pieces)
• ROHS3 compliant with REACH unaffected status
• Superior DC resistance performance (330 mOhm vs 446.5 mOhm) reduces power dissipation
• Acceptable current rating variance (540 mA vs 580 mA) for applications not requiring maximum current headroom
• Wider inductance tolerance (±30%) acceptable for general-purpose filtering and energy storage applications

Both parts are surface mount compatible with identical physical dimensions and thermal operating ranges, enabling direct PCB layout substitution without redesign.

Frequently Asked Questions (FAQ)

Q: Can SRU5018-470Y directly replace SD52-470-R on existing PCBs?

A: Yes. Both inductors share identical physical dimensions (5.20 x 5.20 x 2.00 mm), surface mount footprints, and operating temperature ranges (-40°C to 125°C). No PCB layout modifications are required.

Q: What is the impact of the 40 mA current rating difference?

A: The SRU5018-470Y is rated for 540 mA versus the SD52-470-R at 580 mA. This 7% reduction is acceptable for applications operating below 540 mA continuous current. Applications requiring the full 580 mA rating must use the SD52-470-R.

Q: How does the lower DC resistance of SRU5018-470Y affect circuit performance?

A: The SRU5018-470Y exhibits 26% lower DC resistance (330 mOhm vs 446.5 mOhm). This reduces resistive losses and heat generation, improving efficiency. No circuit redesign is required; the lower resistance is a performance benefit.

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

A: The SRU5018-470Y provides measured Q factor (13 @ 2.52 MHz) and self-resonant frequency (18 MHz) data. The SD52-470-R does not provide these parameters. For applications requiring high-frequency performance specifications, the SRU5018-470Y offers documented frequency response characteristics.

Q: What is the difference in inductance tolerance between these parts?

A: SD52-470-R specifies ±20% tolerance; SRU5018-470Y specifies ±30% tolerance. For applications requiring tighter inductance control, the SD52-470-R is preferred. For general-purpose filtering and energy storage, the ±30% tolerance is acceptable.

Q: Are both parts RoHS compliant?

A: Yes. SD52-470-R is RoHS compliant; SRU5018-470Y is ROHS3 compliant. Both meet current RoHS requirements. The SRU5018-470Y additionally carries REACH unaffected status.

Q: What is the saturation current difference and its significance?

A: SD52-470-R saturates at 500 mA; SRU5018-470Y saturates at 450 mA. This 10% difference means the SRU5018-470Y reaches saturation at lower current levels. Applications operating near saturation limits should verify the 450 mA threshold is acceptable.

Q: Can these parts be used interchangeably in production?

A: Substitution is permissible when current requirements do not exceed 540 mA and inductance tolerance of ±30% is acceptable. Verify application-specific requirements for current rating, saturation behavior, and inductance tolerance before implementing substitution in production designs.