SC1608C-680 Equivalent & Substitute Parts Reference

Part Overview

The SC1608C-680 is a 68 µH shielded inductor manufactured by Signal Transformer, rated for 800 mA continuous current with a maximum DC resistance of 340 mOhm. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant.

Substiute Parts

SC1608C-680

Signal TransformerIn Stock: 1003SC1608C-680 Datasheet

Current PartRFQ

IDCS2512ER680M

Vishay DaleIn Stock: 1183IDCS2512ER680M Datasheet

MFR RecommendedRFQ

SD7030-680-R

Eaton - Electronics DivisionIn Stock: 960SD7030-680-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC1608C-680 are qualified based on the following critical parameters:

• Inductance Value: 68 µH nominal (tolerance range acceptable within ±30%)
• Current Rating: Minimum 800 mA continuous current capability
• DC Resistance: Maximum 340 mOhm to maintain equivalent power dissipation characteristics
• Shielding: Shielded construction required
• Operating Temperature: -40°C to 125°C range
• Mounting Type: Surface mount configuration
• Physical Footprint: Compatible with 6.60mm x 4.45mm x 2.92mm envelope

Two qualified substitutes meet these criteria with acceptable trade-offs in specific parameters.

Parameter Comparison

Engineering Selection Recommendations

IDCS2512ER680M (Vishay Dale) is suitable for applications where the current requirement does not exceed 400 mA. This substitute offers improved inductance tolerance (±20% versus ±30%) and lower DC resistance (290 mOhm), resulting in reduced power dissipation. The part maintains identical physical dimensions and temperature range. Product status is active with ongoing availability.

SD7030-680-R (Eaton - Electronics Division) is the preferred substitute for applications requiring the full 800 mA current rating or higher. This part exceeds the original current specification at 850 mA and provides superior saturation current performance (650 mA). DC resistance remains within acceptable limits at 304 mOhm. The physical footprint is slightly larger (7.00mm x 7.00mm), requiring PCB layout verification. Product status is active with RoHS compliance confirmed.

Selection between substitutes depends on circuit current requirements and available PCB space. Both substitutes maintain the required shielding, operating temperature range, and inductance value within acceptable tolerance.

Frequently Asked Questions (FAQ)

Q: Can IDCS2512ER680M replace SC1608C-680 in all applications?

A: No. The IDCS2512ER680M is rated for 400 mA maximum continuous current, compared to the original 800 mA rating. Use this substitute only in circuits where the actual current demand does not exceed 400 mA. Exceeding this limit will cause inductor saturation and potential thermal failure.

Q: What is the physical footprint difference between substitutes?

A: The SC1608C-680 and IDCS2512ER680M share identical dimensions (6.60mm x 4.45mm x 2.92mm). The SD7030-680-R is larger at 7.00mm x 7.00mm x 3.00mm. Verify PCB layout compatibility before selecting SD7030-680-R, particularly in space-constrained designs.

Q: Are both substitutes RoHS compliant?

A: SD7030-680-R is confirmed RoHS compliant. IDCS2512ER680M RoHS status is not specified in available documentation. Verify compliance requirements with your supply chain before final selection.

Q: How do inductance tolerances affect circuit performance?

A: The SC1608C-680 and SD7030-680-R both carry ±30% tolerance. The IDCS2512ER680M offers tighter tolerance at ±20%. In filter and resonant circuits, tighter tolerance may improve frequency response consistency. In current-limiting applications, tolerance impact is typically minimal.

Q: What does DC resistance (DCR) mean for inductor selection?

A: DC resistance represents resistive losses in the inductor coil. Lower DCR reduces power dissipation and heat generation. IDCS2512ER680M (290 mOhm) and SD7030-680-R (304 mOhm) both offer lower losses than the original SC1608C-680 (340 mOhm), improving overall circuit efficiency.

Q: Can I use SD7030-680-R if my PCB has limited space?

A: No. The SD7030-680-R footprint (7.00mm x 7.00mm) exceeds the original (6.60mm x 4.45mm). Verify available PCB space before committing to this substitute. If space is constrained, use IDCS2512ER680M (identical footprint) provided current requirements do not exceed 400 mA.