SC1608C-3R3 Equivalent & Substitute Parts

Part Overview

The SC1608C-3R3 is a 3.3 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 2.61 A and maximum DC resistance of 55mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across the temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SC1608C-3R3

Signal TransformerIn Stock: 912SC1608C-3R3 Datasheet

Current PartRFQ

SC1608F-3R3

Signal TransformerIn Stock: 826SC1608F-3R3 Datasheet

MFR RecommendedRFQ

CDRH5D14NP-3R3NC

Sumida America Components Inc.In Stock: 878CDRH5D14NP-3R3NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SC1608C-3R3 is determined by the following critical parameters:

• Inductance value: 3.3 µH (fixed requirement)
• Inductance tolerance: ±30% (fixed requirement)
• Mounting type: Surface Mount (fixed requirement)
• Shielding configuration: Shielded (electromagnetic containment requirement)
• Current rating: Minimum 2.61 A (operational requirement)
• DC resistance: Maximum 55mOhm (thermal and efficiency requirement)
• Operating temperature range: -40°C ~ 125°C (environmental requirement)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

Two substitute parts meet these criteria with acceptable parameter variations within engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

SC1608F-3R3 substitution requires design review due to two parameter deviations: current rating reduced to 2 A (below the 2.61 A requirement) and unshielded configuration (versus shielded). This part is suitable only if circuit design permits reduced current capacity and electromagnetic shielding is not critical to system performance.

CDRH5D14NP-3R3NC is the preferred substitute. It maintains shielded configuration, exceeds minimum current rating at 2.4 A, and provides superior DC resistance at 53.7mOhm Max (lower than the 55mOhm maximum). The operating temperature range is reduced to -40°C ~ 105°C, which is acceptable for applications not requiring the full 125°C upper limit. Physical dimensions differ slightly, requiring PCB layout verification. Both substitute parts are active products with ROHS3 compliance and full inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SC1608F-3R3 replace SC1608C-3R3 in all applications?

A: No. SC1608F-3R3 has a lower current rating (2 A versus 2.61 A) and is unshielded. Use only if your circuit operates below 2 A and electromagnetic shielding is not required.

Q: Why is CDRH5D14NP-3R3NC the preferred substitute?

A: CDRH5D14NP-3R3NC maintains shielded configuration, meets the 2.61 A current requirement with 2.4 A rating, and provides lower DC resistance (53.7mOhm). It is an active product with confirmed inventory.

Q: Does the reduced operating temperature range of CDRH5D14NP-3R3NC affect compatibility?

A: CDRH5D14NP-3R3NC operates to 105°C maximum versus 125°C for the original part. Verify your application's maximum operating temperature requirement before selection.

Q: Are there physical footprint differences between substitutes?

A: Yes. CDRH5D14NP-3R3NC has different dimensions (0.240" L x 0.228" W, 0.059" height) compared to SC1608C-3R3 (0.260" L x 0.175" W, 0.115" height). PCB layout verification is required. SC1608F-3R3 shares identical footprint dimensions with the original part.

Q: Are all substitute parts RoHS compliant?

A: Yes. Both SC1608F-3R3 and CDRH5D14NP-3R3NC are ROHS3 compliant, matching the original SC1608C-3R3 certification.