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SCB75C-150 Equivalent & Substitute Parts
Part Overview
The SCB75C-150 is a 15 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring moderate current handling and low DC resistance. This component is classified as Active product status with full RoHS3 compliance. Substitute parts become necessary when addressing supply chain constraints, lead time requirements, or specific packaging preferences while maintaining electrical and mechanical compatibility within defined tolerance ranges.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 15 µH |
| Inductance Tolerance | ±20% |
| Current Rating | 2.1 A |
| DC Resistance (DCR) | 80 mOhm Max |
| Shielding | Shielded |
| Operating Temperature Range | -40°C to 125°C |
| Mounting Type | Surface Mount |
| Package Type | Nonstandard |
| Size | 7.40mm x 7.40mm x 5.50mm (Max Height) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the SCB75C-150 is determined by the following critical parameters:
- Inductance value of 15 µH within ±20% tolerance
- Shielded construction to maintain electromagnetic isolation
- Surface mount configuration for PCB assembly compatibility
- Operating temperature range of -40°C to 125°C minimum
- RoHS3 compliance for regulatory alignment
- Physical dimensions compatible with 7.40mm x 7.40mm footprint tolerance
- DC resistance not exceeding 80 mOhm to ensure thermal performance
The SRR0745A-150M from Bourns Inc. meets all substitution criteria within these defined parameters.
Parameter Comparison
| Parameter | SCB75C-150 (Signal Transformer) | SRR0745A-150M (Bourns Inc.) | Compatibility |
|---|---|---|---|
| Inductance | 15 µH | 15 µH | Matched |
| Inductance Tolerance | ±20% | ±20% | Matched |
| Current Rating (Amps) | 2.1 A | 1.9 A | SRR0745A-150M rated lower; verify application current requirements |
| DC Resistance (DCR) | 80 mOhm Max | 75 mOhm Max | SRR0745A-150M superior; within acceptable range |
| Shielding | Shielded | Shielded | Matched |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C | Matched |
| Mounting Type | Surface Mount | Surface Mount | Matched |
| Size (L x W) | 7.40mm x 7.40mm | 7.30mm x 7.30mm | Footprint compatible within tolerance |
| Height (Max) | 5.50mm | 4.70mm | SRR0745A-150M lower profile; compatible |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Matched |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | Matched |
Engineering Selection Recommendations
The SRR0745A-150M qualifies as a direct substitute for the SCB75C-150 based on matched electrical specifications and compliance certifications. Both components maintain ROHS3 compliance, identical operating temperature ranges, and equivalent inductance values with matching tolerance bands. The SRR0745A-150M demonstrates superior DC resistance performance at 75 mOhm maximum versus 80 mOhm maximum, reducing thermal dissipation. The substitute component features a lower saturation current rating of 1.9 A compared to 2.1 A; circuit design must confirm that application current requirements do not exceed 1.9 A continuous operation. Physical dimensions are compatible, with the SRR0745A-150M offering a reduced height profile of 4.70mm maximum, which may provide layout advantages in space-constrained applications. Both components carry AEC-Q200 qualification on the substitute part, indicating automotive-grade reliability standards.
Frequently Asked Questions (FAQ)
Q: Can the SRR0745A-150M replace the SCB75C-150 in all applications?
A: The SRR0745A-150M is electrically compatible when circuit current requirements remain at or below 1.9 A. The lower current rating is the primary constraint. All other electrical and mechanical parameters align within acceptable substitution criteria.
Q: What is the impact of the 0.1 A difference in current rating?
A: The SCB75C-150 supports 2.1 A while the SRR0745A-150M supports 1.9 A. Applications operating above 1.9 A continuous current require the original SCB75C-150 to prevent thermal stress and component degradation.
Q: Are the physical dimensions compatible for PCB layout?
A: Yes. The SRR0745A-150M footprint of 7.30mm x 7.30mm is compatible with the SCB75C-150 footprint of 7.40mm x 7.40mm. The reduced height of 4.70mm versus 5.50mm provides additional clearance in vertical space-constrained designs.
Q: Do both parts meet the same compliance standards?
A: Both components are ROHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity). The SRR0745A-150M carries additional AEC-Q200 automotive qualification, which may be beneficial for automotive or high-reliability applications.
Q: What is the DC resistance difference, and does it matter?
A: The SRR0745A-150M has 75 mOhm maximum DCR versus 80 mOhm maximum for the SCB75C-150. The 5 mOhm improvement reduces resistive losses and heat generation, providing a marginal thermal advantage in the substitute component.
Q: Can packaging format affect substitution decisions?
A: The SCB75C-150 uses standard packaging while the SRR0745A-150M is supplied in Tape & Reel format. Verify that your assembly process accommodates reel-based component feeding before selecting the substitute.
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