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SC1608C-471 Equivalent & Substitute Parts
Part Overview
The SC1608C-471 is a 470 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 320 mA continuous current with a maximum DC resistance of 2.85 Ohm. This component is classified as obsolete, making substitute part identification necessary for ongoing production and maintenance applications. The shielded design and current rating define its primary application parameters.
Substiute Parts
Key Parameters
| Parameter | SC1608C-471 |
|---|---|
| Inductance | 470 µH |
| Current Rating | 320 mA |
| DC Resistance (DCR) | 2.85 Ohm Max |
| Shielding | Shielded |
| Tolerance | ±30% |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
| Package Size | 0.260" L x 0.175" W (6.60mm x 4.45mm) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute part identification for the SC1608C-471 is based on the following critical parameters:
- Inductance Value: 470 µH (exact match required)
- Current Rating: Minimum 320 mA to maintain circuit performance
- DC Resistance: Lower DCR values improve efficiency; higher values increase power dissipation
- Shielding Configuration: Shielded design reduces electromagnetic interference
- Package Footprint: 0.260" L x 0.175" W (6.60mm x 4.45mm) for PCB compatibility
- Operating Temperature Range: -40°C ~ 125°C for thermal compatibility
- Surface Mount Configuration: Required for automated assembly processes
The SC1608F-471 shares the same inductance value, package footprint, operating temperature range, and surface mount configuration. However, it presents trade-offs in current rating, DC resistance, and shielding characteristics that must be evaluated against specific circuit requirements.
Parameter Comparison
| Parameter | SC1608C-471 (Main) | SC1608F-471 (Substitute) |
|---|---|---|
| Inductance | 470 µH | 470 µH |
| Tolerance | ±30% | ±20% |
| Current Rating (Amps) | 320 mA | 180 mA |
| Current - Saturation (Isat) | 60 mA | 160 mA |
| DC Resistance (DCR) | 2.85 Ohm Max | 7.25 Ohm Max |
| Shielding | Shielded | Unshielded |
| Type | Shielded Inductor | Wirewound |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package Size | 0.260" L x 0.175" W (6.60mm x 4.45mm) | 0.260" L x 0.175" W (6.60mm x 4.45mm) |
| Product Status | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The SC1608F-471 is an active product from Signal Transformer with identical inductance and package footprint to the obsolete SC1608C-471. Both components meet ROHS3 compliance and operate within the same temperature range.
Critical Differences for Selection:
The SC1608F-471 has a reduced current rating of 180 mA compared to the SC1608C-471's 320 mA rating. This 44% reduction in current capacity makes the SC1608F-471 unsuitable for circuits requiring the full 320 mA specification. Additionally, the DC resistance increases from 2.85 Ohm to 7.25 Ohm, resulting in 2.5 times higher resistive losses. The SC1608F-471 is unshielded, eliminating electromagnetic interference suppression provided by the shielded SC1608C-471 design.
Selection of the SC1608F-471 is limited to applications where circuit current requirements do not exceed 180 mA, electromagnetic shielding is not required, and increased power dissipation is acceptable.
Frequently Asked Questions (FAQ)
Q: Can the SC1608F-471 directly replace the SC1608C-471 in all applications?
A: No. The SC1608F-471 has a lower current rating (180 mA vs. 320 mA) and higher DC resistance (7.25 Ohm vs. 2.85 Ohm). Direct substitution is only valid for circuits operating below 180 mA continuous current and where shielding is not required.
Q: What is the impact of the increased DC resistance in the SC1608F-471?
A: Higher DC resistance increases power dissipation in the inductor. At 180 mA, the SC1608F-471 dissipates approximately 234 mW compared to 163 mW for the SC1608C-471 at the same current level. This affects thermal performance and circuit efficiency.
Q: Are both parts compatible with the same PCB footprint?
A: Yes. Both the SC1608C-471 and SC1608F-471 share identical package dimensions of 0.260" L x 0.175" W (6.60mm x 4.45mm) and surface mount configuration, allowing physical interchangeability on the PCB.
Q: Does the shielding difference affect circuit performance?
A: Yes. The SC1608C-471 is shielded to reduce electromagnetic interference, while the SC1608F-471 is unshielded. In circuits sensitive to EMI or operating in electromagnetically noisy environments, the unshielded SC1608F-471 may introduce coupling effects not present with the shielded SC1608C-471.
Q: What is the tolerance difference between these parts?
A: The SC1608C-471 has ±30% inductance tolerance, while the SC1608F-471 has ±20% tolerance. The tighter tolerance of the SC1608F-471 provides better inductance accuracy for precision applications.
Q: Are both parts RoHS compliant?
A: Yes. Both the SC1608C-471 and SC1608F-471 are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.
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