SCB75C-180 Equivalent & Substitute Parts

Part Overview

The SCB75C-180 is a 18 µH shielded inductor manufactured by Signal Transformer, rated for 1.89 A continuous current with a maximum DC resistance of 90 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and maintains ROHS3 compliance. The part is currently active in production with 707 units available in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Substiute Parts

SCB75C-180

Signal TransformerIn Stock: 737SCB75C-180 Datasheet

Current PartRFQ

SRR0745A-180M

Bourns Inc.In Stock: 6650SRR0745A-180M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR0745A-180M from Bourns Inc. qualifies as an equivalent substitute based on the following critical parameters:

• Inductance Value: Both parts specify 18 µH at 1 kHz test frequency with ±20% tolerance
• DC Resistance: Both maintain 90 mOhm maximum DC resistance
• Shielding Configuration: Both are shielded inductors
• Operating Temperature: Both support -40°C to 125°C range
• Mounting Technology: Both are surface mount components
• Compliance Standards: Both are ROHS3 compliant with MSL 1 rating

The SRR0745A-180M current rating of 1.8 A is within acceptable substitution parameters for applications rated at or below 1.8 A. The saturation current (Isat) of 1.95 A in the substitute part exceeds the 1.26 A saturation current of the main part, providing equivalent or improved performance margin in this parameter.

Parameter Comparison

Engineering Selection Recommendations

Both the SCB75C-180 and SRR0745A-180M are active production components with full ROHS3 compliance and unlimited moisture sensitivity ratings. The SRR0745A-180M carries AEC-Q200 automotive qualification, providing additional reliability documentation for applications requiring automotive-grade components.

The dimensional difference of 0.10mm in length and width, combined with the 0.80mm reduction in seated height for the SRR0745A-180M, must be evaluated against specific PCB layout constraints. The substitute part's lower profile may provide advantages in space-constrained designs.

Selection between these parts should be based on application current requirements, PCB layout compatibility, and any specific qualification or supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRR0745A-180M replace the SCB75C-180 in all applications?

A: The SRR0745A-180M is suitable for applications where the circuit current does not exceed 1.8 A. Applications requiring the full 1.89 A rating of the SCB75C-180 must use the original part or confirm the substitute's adequacy through circuit analysis.

Q: What are the physical compatibility considerations?

A: Both parts are surface mount inductors with nonstandard packages. The SRR0745A-180M has a smaller footprint (7.30mm x 7.30mm versus 7.40mm x 7.40mm) and lower profile (4.70mm versus 5.50mm seated height). PCB layout and component clearance requirements must be verified for the substitute part.

Q: Are there compliance differences between these parts?

A: Both parts meet ROHS3 compliance and carry MSL 1 ratings. The SRR0745A-180M additionally carries AEC-Q200 automotive qualification, which may be required for specific applications but is not mandatory for general industrial use.

Q: How do the saturation current ratings affect substitution?

A: The SRR0745A-180M has a higher saturation current (1.95 A) compared to the SCB75C-180 (1.26 A). This provides improved performance margin and does not restrict substitution from a saturation perspective.

Q: What is the inductance tolerance impact on circuit design?

A: Both parts specify ±20% inductance tolerance at 1 kHz. Circuit designs must account for this tolerance range regardless of which part is selected.