SCB75F-180 Equivalent & Substitute Parts

Part Overview

The SCB75F-180 is a fixed inductance surface mount component manufactured by Signal Transformer. This 18 µH unshielded wirewound inductor is rated for 2.1 A continuous current with a maximum DC resistance of 100 mOhm. The component operates across the industrial temperature range of -40°C to 125°C and maintains active product status with ROHS3 compliance.

Substitute parts become necessary when addressing specific application requirements such as shielding characteristics, current saturation performance, or inventory availability across different manufacturing sources.

Substiute Parts

SCB75F-180

Signal TransformerIn Stock: 898SCB75F-180 Datasheet

Current PartRFQ

SRR0745A-180M

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCB75F-180 is determined by the following critical parameters:

• Inductance Value: Must match 18 µH at 1 kHz test frequency
• Inductance Tolerance: ±20% specification maintained
• Operating Temperature Range: -40°C to 125°C compatibility required
• Mounting Type: Surface mount configuration only
• Package Footprint: Physical dimensions must accommodate board layout constraints
• RoHS Compliance: ROHS3 status required for regulatory alignment

The SRR0745A-180M from Bourns Inc. qualifies as a substitute based on matching inductance value, tolerance, temperature range, mounting type, and RoHS compliance. Differences in shielding, current rating, DC resistance, and saturation current represent design trade-offs that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the SCB75F-180 and SRR0745A-180M maintain active product status and ROHS3 compliance, supporting long-term design continuity. The SRR0745A-180M carries AEC-Q200 qualification, indicating automotive-grade reliability screening.

Selection between these parts depends on application-specific constraints:

• Current Capacity: The SCB75F-180 supports 2.1 A continuous current versus 1.8 A for the SRR0745A-180M. Applications requiring the full 2.1 A rating must use the main part.
• Electromagnetic Shielding: The SRR0745A-180M provides shielded construction, beneficial in noise-sensitive circuits. The SCB75F-180 unshielded design may be preferred where shielding is unnecessary or space is constrained.
• DC Resistance: The SRR0745A-180M offers lower DCR (90 mOhm vs. 100 mOhm), reducing resistive losses in power applications.
• Physical Footprint: The SRR0745A-180M occupies slightly less board space (7.30mm vs. 7.40mm) with reduced height (4.70mm vs. 5.50mm).

Frequently Asked Questions (FAQ)

Q: Can the SRR0745A-180M replace the SCB75F-180 in all applications?

A: Substitution is valid only when circuit current requirements do not exceed 1.8 A. The SRR0745A-180M is rated for 1.8 A continuous current, below the SCB75F-180 specification of 2.1 A. Verify actual circuit current draw before substitution.

Q: What is the impact of shielding differences between these parts?

A: The SCB75F-180 is unshielded while the SRR0745A-180M is shielded. Shielding reduces electromagnetic radiation and susceptibility to external interference. Selection depends on circuit layout and EMI requirements. Unshielded inductors typically occupy less space and may be preferred in non-sensitive applications.

Q: Are both parts compatible with the same PCB footprint?

A: Both parts are surface mount with similar footprints (7.40mm vs. 7.30mm). The SRR0745A-180M is slightly smaller and lower profile (4.70mm vs. 5.50mm height). Verify PCB layout clearances before substitution, particularly for height-constrained designs.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity. The SRR0745A-180M additionally carries AEC-Q200 automotive qualification. For automotive or high-reliability applications, the SRR0745A-180M provides additional qualification documentation.

Q: What is the difference in DC resistance between these inductors?

A: The SCB75F-180 has a maximum DCR of 100 mOhm while the SRR0745A-180M is 90 mOhm. Lower resistance reduces power dissipation and heat generation. In power delivery applications, the SRR0745A-180M offers improved efficiency.