SPD74R-683M Equivalent & Substitute Parts

Part Overview

The SPD74R-683M is a 68 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications with a current rating of 1.05 A and maximum DC resistance of 380 mOhm. This component is classified as Active product status and is ROHS3 compliant. Substitute parts may be required due to inventory constraints, supply chain discontinuities, or application-specific performance requirements while maintaining equivalent electrical and mechanical functionality.

Substiute Parts

SPD74R-683M

API Delevan Inc.In Stock: 1155SPD74R-683M Datasheet

Current PartRFQ

VLS5045EX-680M-H

TDK CorporationIn Stock: 3004VLS5045EX-680M-H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPD74R-683M with the VLS5045EX-680M-H is based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Inductance value: 68 µH (both parts)
• Inductance tolerance: ±20% (both parts)
• Core type: Ferrite shielded drum core wirewound
• Mounting: Surface mount
• RoHS compliance: ROHS3 compliant
• Moisture sensitivity: MSL 1 (Unlimited)
• REACH status: REACH Unaffected

Substitution Constraints: The VLS5045EX-680M-H operates within the same inductance specification and tolerance band. However, the substitute part exhibits different current ratings, DC resistance, and physical dimensions, which must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (SPD74R-683M): The SPD74R-683M is the specified component and should be used when available. It provides a current rating of 1.05 A with 380 mOhm maximum DC resistance, operating across -55°C to 125°C. This part is ROHS3 compliant and maintains Active product status.

Substitute Part (VLS5045EX-680M-H): The VLS5045EX-680M-H from TDK Corporation is electrically equivalent in inductance value and tolerance. Selection of this substitute requires verification that the application can accommodate the following differences:

• Reduced current rating: 900 mA versus 1.05 A
• Increased DC resistance: 533 mOhm versus 380 mOhm
• Reduced operating temperature minimum: -40°C versus -55°C
• Smaller physical footprint: 5.30 mm × 5.00 mm versus 7.30 mm × 7.30 mm
• Higher saturation current: 1.1 A versus 1.05 A

Both parts are ROHS3 compliant, Active status, and suitable for surface mount assembly. The VLS5045EX-680M-H includes AEC-Q200 automotive qualification, which may provide additional reliability assurance for specific applications.

Frequently Asked Questions (FAQ)

Q: Can the VLS5045EX-680M-H directly replace the SPD74R-683M in all applications?

A: Direct replacement is possible only when the application current requirement does not exceed 900 mA and the operating temperature range does not require operation below -40°C. The increased DC resistance of 533 mOhm versus 380 mOhm will result in higher power dissipation at rated current.

Q: What is the impact of the 153 mOhm increase in DC resistance?

A: At the substitute part's rated current of 900 mA, power dissipation increases from 0.308 mW (main part at 1.05 A) to 0.432 mW. Thermal management and circuit performance must be evaluated accordingly.

Q: Are the physical dimensions compatible with the PCB layout?

A: The VLS5045EX-680M-H is smaller (5.30 mm × 5.00 mm × 4.50 mm) compared to the SPD74R-683M (7.30 mm × 7.30 mm × 4.70 mm). PCB footprints must be verified for compatibility. The smaller footprint may allow for improved board density.

Q: What is the significance of the different inductance test frequencies?

A: The main part is tested at 1 kHz while the substitute is tested at 100 kHz. Both parts maintain the same ±20% tolerance specification. Frequency-dependent inductance behavior should be evaluated for applications operating at frequencies significantly different from the test conditions.

Q: Are both parts suitable for automotive applications?

A: The VLS5045EX-680M-H carries AEC-Q200 automotive qualification. The SPD74R-683M does not list automotive certification in the provided specifications. Application requirements should determine the necessity of automotive-grade components.

Q: What is the moisture sensitivity level for both parts?

A: Both the SPD74R-683M and VLS5045EX-680M-H are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.