SCB75F-101 Equivalent & Substitute Parts

Part Overview

The SCB75F-101 is a 100 µH unshielded wirewound surface mount inductor manufactured by Signal Transformer, rated for 850 mA continuous current with a maximum DC resistance of 550mOhm. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent inductance values, current ratings, and mounting specifications align within acceptable tolerance ranges, enabling direct replacement in circuit applications where the original part becomes unavailable or when alternative sourcing is required.

Substiute Parts

SCB75F-101

Signal TransformerIn Stock: 764SCB75F-101 Datasheet

Current PartRFQ

SPD74R-104M

API Delevan Inc.In Stock: 1736SPD74R-104M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCB75F-101 is determined by the following critical parameters:

• Inductance Value: Must be 100 µH with ±20% tolerance
• Current Rating: Minimum 850 mA continuous current capability
• DC Resistance: Maximum 550 mOhm to maintain circuit performance
• Mounting Type: Surface mount configuration required
• Operating Temperature: Must support -40°C ~ 125°C range
• Compliance: ROHS3 and REACH compliance maintained
• Physical Footprint: Dimensions and height must accommodate PCB layout constraints

The SPD74R-104M meets these substitution criteria with equivalent inductance, superior current rating (860 mA), and compatible surface mount packaging, despite differences in shielding configuration and core material.

Parameter Comparison

Engineering Selection Recommendations

Both the SCB75F-101 and SPD74R-104M maintain Active product status and full ROHS3 compliance with REACH unaffected classification. The SPD74R-104M provides equivalent inductance and superior saturation current performance (860 mA vs. 510 mA), with extended lower temperature operating range (-55°C vs. -40°C). The primary design consideration is the shielding difference: the SPD74R-104M features shielded drum core construction compared to the unshielded wirewound design of the SCB75F-101. DC resistance is marginally higher (610 mOhm vs. 550 mOhm), and physical dimensions are slightly reduced. Component selection should be based on electromagnetic interference requirements and PCB layout constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the SPD74R-104M directly replace the SCB75F-101 in all applications?

A: Both parts share identical inductance (100 µH) and tolerance (±20%), equivalent current ratings (850 mA / 860 mA), and compatible surface mount packaging. The primary difference is shielding configuration. Applications sensitive to electromagnetic interference may benefit from the shielded SPD74R-104M design. DC resistance difference (60 mOhm) should be evaluated against circuit power dissipation requirements.

Q: What is the significance of the saturation current difference?

A: The SPD74R-104M saturation current (860 mA) exceeds the SCB75F-101 (510 mA), indicating superior core material performance and reduced inductance degradation under peak current conditions. This provides additional design margin in applications approaching maximum current ratings.

Q: Are there physical footprint compatibility concerns?

A: The SPD74R-104M dimensions (7.30mm x 7.30mm x 4.70mm) are slightly smaller than the SCB75F-101 (7.40mm x 7.40mm x 5.50mm). PCB layout verification is required to confirm clearance and mounting compatibility, particularly for height-constrained applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SCB75F-101 and SPD74R-104M are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level), ensuring equivalent regulatory and environmental compliance.

Q: How does shielding affect circuit performance?

A: Shielded inductors reduce radiated electromagnetic interference and susceptibility to external fields. The SPD74R-104M shielded design is advantageous in noise-sensitive applications. Unshielded designs like the SCB75F-101 may be preferred in space-constrained or cost-optimized applications where EMI is not a primary concern.