SC1608C-221 Equivalent & Substitute Parts

Part Overview

The SC1608C-221 is a 220 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 480 mA continuous current with a maximum DC resistance of 1.22Ohm. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain the core inductance value, operating temperature range, and surface mount compatibility while accommodating variations in current rating, shielding configuration, and DC resistance within acceptable application parameters.

Substiute Parts

SC1608C-221

Signal TransformerIn Stock: 922SC1608C-221 Datasheet

Current PartRFQ

SC1608F-221

Signal TransformerIn Stock: 873SC1608F-221 Datasheet

MFR RecommendedRFQ

SD6030-221-R

Eaton - Electronics DivisionIn Stock: 741SD6030-221-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC1608C-221 is determined by the following critical parameters:

Primary Criteria (Must Match or Exceed):

• Inductance value: 220 µH nominal (±30% tolerance acceptable)
• Operating temperature range: -40°C ~ 125°C minimum
• Mounting type: Surface Mount required
• RoHS compliance: ROHS3 or equivalent

Secondary Criteria (Application-Dependent):

• Current rating: Minimum 480 mA required for direct replacement
• DC resistance: Lower values preferred to minimize power dissipation
• Shielding: Shielded configuration preferred for EMI-sensitive applications; unshielded acceptable if circuit layout permits
• Package dimensions: Physical footprint compatibility with PCB layout

Two substitute parts meet the primary criteria with documented trade-offs in current handling and DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

SC1608F-221 (Signal Transformer): This substitute maintains identical physical dimensions and the same manufacturer lineage as the main part. It offers improved inductance tolerance (±20% vs ±30%) and active product status. However, the current rating of 270 mA is insufficient for applications requiring the full 480 mA capability of the SC1608C-221. The unshielded configuration may introduce EMI coupling in sensitive circuits. This part is suitable only for applications with current requirements below 270 mA and where EMI shielding is not critical.

SD6030-221-R (Eaton - Electronics Division): This substitute provides the highest current rating (500 mA), exceeding the SC1608C-221 specification and accommodating design margin. The DC resistance of 1.2Ohm is nearly equivalent to the main part (1.22Ohm), minimizing power dissipation differences. Shielded construction matches the original design intent. The ferrite drum core construction and slightly larger footprint (6.00mm x 6.00mm vs 6.60mm x 4.45mm) require PCB layout verification. The inductance value of 210.9 µH falls within the ±30% tolerance band of the 220 µH specification. Active product status and RoHS compliance ensure long-term availability. This part is the preferred substitute for direct replacement in current-critical applications.

Frequently Asked Questions (FAQ)

Q: Can SC1608F-221 be used as a direct replacement for SC1608C-221?

A: SC1608F-221 is not suitable for direct replacement in applications requiring the full 480 mA current rating, as its maximum rating is 270 mA. The unshielded configuration also differs from the original shielded design. Use only in applications with current requirements below 270 mA and where EMI shielding is not required.

Q: What are the key differences between SD6030-221-R and SC1608C-221?

A: SD6030-221-R exceeds the current rating (500 mA vs 480 mA), maintains equivalent DC resistance (1.2Ohm vs 1.22Ohm), and preserves shielded construction. The inductance value is 210.9 µH, which falls within the ±30% tolerance of the 220 µH specification. Physical dimensions differ slightly (6.00mm x 6.00mm vs 6.60mm x 4.45mm), requiring PCB layout verification.

Q: Is the inductance tolerance difference between SC1608C-221 (±30%) and SC1608F-221 (±20%) significant?

A: The tighter tolerance of SC1608F-221 provides better inductance consistency. However, this advantage is offset by insufficient current rating and unshielded configuration for most applications requiring the SC1608C-221.

Q: Does the ferrite core material in SD6030-221-R affect circuit performance?

A: Ferrite core construction is standard for surface mount inductors in this inductance and current range. Performance differences are negligible when DC resistance and inductance values are equivalent. The ferrite material supports the higher current rating and shielded design.

Q: Can I use SD6030-221-R in a layout designed for SC1608C-221?

A: Physical footprint differences (6.00mm x 6.00mm vs 6.60mm x 4.45mm) require PCB layout verification. The slightly taller height (3.00mm vs 2.92mm) is negligible. Confirm component placement clearances and trace routing compatibility before assembly.

Q: Are both substitute parts RoHS compliant?

A: Yes. SC1608F-221 is ROHS3 Compliant. SD6030-221-R is RoHS Compliant. Both meet regulatory requirements for restricted substance elimination.