SPD74R-473M Equivalent & Substitute Parts

Part Overview

The SPD74R-473M is a 47 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.3 A continuous current with a maximum DC resistance of 260 mOhm. This surface mount component operates across the temperature range of -55°C to 125°C and is ROHS3 compliant. The part is currently active in production with substantial inventory availability. Equivalent and substitute parts may be required due to supply chain constraints, regional availability, or specific application requirements where alternative electrical or mechanical characteristics are acceptable within design tolerances.

Substiute Parts

SPD74R-473M

API Delevan Inc.In Stock: 39381SPD74R-473M Datasheet

Current PartRFQ

VLS5045EX-470M-H

TDK CorporationIn Stock: 3005VLS5045EX-470M-H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD74R-473M is determined by the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 47 µH (±20% tolerance band allows 37.6 µH to 56.4 µH)
• Current rating: Minimum 1.3 A continuous current capability
• DC resistance: Maximum 260 mOhm (lower values preferred for reduced power dissipation)
• Core type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration required
• Mounting: Surface mount technology
• Temperature range: Minimum -55°C to 125°C coverage

Secondary Compatibility Factors:

• Package classification: Nonstandard form factor
• RoHS compliance: ROHS3 required
• Moisture sensitivity: MSL 1 or equivalent

The VLS5045EX-470M-H from TDK Corporation qualifies as a substitute based on matching inductance (47 µH), ferrite shielded drum core construction, surface mount configuration, and ROHS3 compliance. However, the substitute exhibits reduced continuous current rating (1 A versus 1.3 A) and increased DC resistance (390 mOhm versus 260 mOhm maximum), which may impact thermal performance and current handling capacity in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the SPD74R-473M and VLS5045EX-470M-H are active production components with ROHS3 compliance and MSL 1 moisture sensitivity ratings, ensuring regulatory and environmental compatibility. The primary selection criterion depends on application current requirements and thermal constraints.

The SPD74R-473M is the preferred choice for applications requiring the full 1.3 A continuous current rating or where minimized DC resistance (260 mOhm maximum) is critical for reducing I²R losses and thermal generation. This part supports the extended lower temperature limit of -55°C, suitable for aerospace, military, or extreme environment applications.

The VLS5045EX-470M-H serves as a functional substitute for applications operating at or below 1 A continuous current, where the higher DC resistance (390 mOhm maximum) and reduced temperature range (-40°C to 125°C) are acceptable. The TDK component includes AEC-Q200 automotive qualification, making it suitable for automotive and industrial applications with automotive-grade reliability requirements.

Frequently Asked Questions (FAQ)

Q: Can the VLS5045EX-470M-H directly replace the SPD74R-473M in all applications?

A: Direct substitution is limited by current rating and DC resistance differences. The VLS5045EX-470M-H is suitable only for circuits operating at 1 A or below continuous current. Applications requiring 1.3 A operation or circuits sensitive to inductor losses require the SPD74R-473M.

Q: What is the impact of the 130 mOhm DC resistance difference between these parts?

A: At 1 A continuous current, the SPD74R-473M dissipates 260 mW while the VLS5045EX-470M-H dissipates 390 mW. This 50% increase in resistive losses generates additional heat and may require thermal management review in power-sensitive applications.

Q: Are both parts suitable for low-temperature operation below -40°C?

A: The SPD74R-473M operates to -55°C, supporting applications requiring extended low-temperature performance. The VLS5045EX-470M-H minimum operating temperature is -40°C, limiting its use in extreme cold environments.

Q: Do both inductors meet automotive qualification standards?

A: The VLS5045EX-470M-H carries AEC-Q200 automotive qualification. The SPD74R-473M does not list automotive certification in the provided specifications.

Q: Are the physical dimensions compatible for PCB layout?

A: The SPD74R-473M measures 7.30mm × 7.30mm × 4.70mm (height seated maximum). The VLS5045EX-470M-H measures 5.30mm × 5.00mm × 4.50mm (height seated maximum). The TDK component is physically smaller and may require PCB layout verification before substitution.

Q: What is the inductance tolerance band for both parts?

A: Both parts carry ±20% inductance tolerance, resulting in an acceptable range of 37.6 µH to 56.4 µH. This tolerance band must be evaluated against circuit design margins.