SC1608C-4R7 Equivalent & Substitute Parts

Part Overview

The SC1608C-4R7 is a 4.7 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 2.47 A continuous current with 60mOhm maximum DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±30%
Current Rating	2.47 A
DC Resistance (DCR)	60mOhm Max
Shielding	Shielded
Mounting Type	Surface Mount
Package Dimensions	0.260" L x 0.175" W (6.60mm x 4.45mm)
Height - Seated (Max)	0.115" (2.92mm)
Operating Temperature	-40°C ~ 125°C
Test Frequency	100 kHz
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SC1608C-4R7 is determined by strict equivalence across the following critical parameters:

Inductance value: 4.7 µH (primary functional requirement)
Inductance tolerance: ±30% maximum acceptable deviation
DC resistance: 60mOhm maximum (electrical performance constraint)
Shielding: Shielded configuration (electromagnetic compatibility requirement)
Mounting type: Surface mount (assembly compatibility)
Physical dimensions: 0.260" L x 0.175" W, 0.115" max height (PCB layout constraint)
Operating temperature range: -40°C to 125°C minimum (thermal compatibility)
Test frequency: 100 kHz (measurement standard)
Compliance: ROHS3 and REACH requirements (regulatory requirement)

The IDCS2512ER4R7M from Vishay Dale meets all substitution criteria within these defined parameters.

Parameter Comparison

Parameter	SC1608C-4R7 (Signal Transformer)	IDCS2512ER4R7M (Vishay Dale)	Compatibility
Inductance	4.7 µH	4.7 µH	Equivalent
Inductance Tolerance	±30%	±20%	Substitute tighter tolerance
Current Rating	2.47 A	1.4 A	Substitute lower rating
DC Resistance (DCR)	60mOhm Max	60mOhm Max	Equivalent
Shielding	Shielded	Shielded	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Dimensions	0.260" L x 0.175" W (6.60mm x 4.45mm)	0.260" L x 0.175" W (6.60mm x 4.45mm)	Equivalent
Height - Seated (Max)	0.115" (2.92mm)	0.115" (2.92mm)	Equivalent
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	Equivalent
Test Frequency	100 kHz	100 kHz	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL Rating	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute active component

Engineering Selection Recommendations

The IDCS2512ER4R7M is the qualified substitute for SC1608C-4R7 based on the following engineering criteria:

Compliance and Availability: The IDCS2512ER4R7M maintains active product status with current manufacturing support, whereas the SC1608C-4R7 is obsolete. Both components satisfy ROHS3 and REACH regulatory requirements.

Electrical Equivalence: Both inductors provide 4.7 µH inductance at 100 kHz test frequency with identical 60mOhm maximum DC resistance. The substitute offers tighter inductance tolerance (±20% versus ±30%), which provides improved circuit performance consistency.

Physical Compatibility: Identical footprint dimensions (0.260" L x 0.175" W, 0.115" max height) and surface mount configuration ensure direct PCB layout compatibility without redesign.

Current Rating Consideration: The IDCS2512ER4R7M is rated for 1.4 A continuous current, compared to 2.47 A for the original part. Circuit designs operating at or below 1.4 A continuous current are fully compatible. Designs requiring current above 1.4 A require evaluation against the substitute's saturation characteristics and thermal performance.

Thermal and Environmental: Both components operate across -40°C to 125°C and maintain MSL 1 (unlimited moisture sensitivity level) classification, ensuring equivalent reliability in standard industrial environments.

Frequently Asked Questions (FAQ)

Q: Can IDCS2512ER4R7M directly replace SC1608C-4R7 in existing designs?

A: Direct replacement is possible for circuits operating at or below 1.4 A continuous current. The identical inductance value, DC resistance, physical dimensions, and operating temperature range ensure functional compatibility. Designs exceeding 1.4 A require current capacity evaluation.

Q: What is the significance of the inductance tolerance difference (±30% vs ±20%)?

A: The IDCS2512ER4R7M provides tighter tolerance control, resulting in more consistent inductance values across production batches. This improves circuit performance predictability and reduces design margin requirements. The tighter tolerance is a performance advantage for the substitute.

Q: Are there packaging differences between these components?

A: The SC1608C-4R7 packaging is listed as nonstandard. The IDCS2512ER4R7M is supplied in Tape & Reel (TR) format. Both maintain identical physical dimensions and surface mount configuration, ensuring PCB compatibility.

Q: Why is the original part obsolete?

A: The SC1608C-4R7 is classified as obsolete by Signal Transformer. The IDCS2512ER4R7M from Vishay Dale is an active product with current manufacturing support, making it the appropriate selection for new designs and ongoing procurement.

Q: What compliance certifications apply to both components?

A: Both the SC1608C-4R7 and IDCS2512ER4R7M are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for industrial and commercial applications.

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