SCR74B-680 Equivalent & Substitute Parts

Part Overview

The SCR74B-680 is a 68 µH shielded inductor manufactured by Signal Transformer, rated for 1.32 A continuous current with a maximum DC resistance of 330mOhm. This component is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The part operates across the industrial temperature range of -40°C to 125°C and is housed in a nonstandard surface mount package measuring 8.30mm × 7.50mm × 5.00mm (max height).

Substiute Parts

SCR74B-680

Signal TransformerIn Stock: 1014SCR74B-680 Datasheet

Current PartRFQ

ASPIAIG-S8050-680M-T

Abracon LLCIn Stock: 813ASPIAIG-S8050-680M-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASPIAIG-S8050-680M-T from Abracon LLC qualifies as a direct substitute based on the following critical parameters:

• Inductance Match: Both parts specify 68 µH with ±20% tolerance
• Shielding Configuration: Both are shielded inductors, maintaining electromagnetic isolation requirements
• Temperature Range Compatibility: Both operate across -40°C to 125°C
• Surface Mount Technology: Both use surface mount packaging for PCB integration
• Regulatory Compliance: Both are ROHS3 compliant and REACH unaffected

The substitute part demonstrates improved electrical performance characteristics while maintaining functional equivalence within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

The ASPIAIG-S8050-680M-T is the qualified substitute for the obsolete SCR74B-680. Selection is based on:

• Product Status: The substitute is active and in production, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements
• AEC-Q200 Certification: The substitute carries AEC-Q200 automotive-grade qualification, providing additional reliability assurance for critical applications
• Electrical Performance: The substitute exceeds the original part specifications in current rating (1.45 A vs. 1.32 A), saturation current (2 A vs. 680 mA), and offers lower DC resistance (252 mOhm vs. 330 mOhm), resulting in reduced power dissipation

Frequently Asked Questions (FAQ)

Q: Can the ASPIAIG-S8050-680M-T directly replace the SCR74B-680 in existing designs?

A: Yes. Both parts share identical inductance values (68 µH ±20%), operating temperature ranges (-40°C to 125°C), shielding configuration, and surface mount technology. The substitute meets or exceeds all critical electrical parameters.

Q: What are the physical dimension differences between these parts?

A: The SCR74B-680 measures 8.30mm L × 7.50mm W × 5.00mm H (max). The ASPIAIG-S8050-680M-T measures 8.00mm L × 8.00mm W × 5.20mm H (max). Both are nonstandard packages; verify PCB layout compatibility before implementation.

Q: Does the lower DC resistance of the substitute part affect circuit performance?

A: The ASPIAIG-S8050-680M-T exhibits 252 mOhm DC resistance compared to 330 mOhm maximum for the original part. Lower resistance reduces I²R losses and heat generation, providing improved efficiency without altering the inductive function.

Q: Are there packaging differences between these parts?

A: The SCR74B-680 is supplied as standard inventory. The ASPIAIG-S8050-680M-T is supplied in Tape & Reel (TR) packaging. Verify reel specifications and handling requirements for your production process.

Q: What is the significance of the AEC-Q200 rating on the substitute part?

A: AEC-Q200 certification indicates the part meets automotive-grade reliability standards. This qualification is not present on the original part but provides additional assurance for applications requiring enhanced reliability documentation.