SC1608F-330 Equivalent & Substitute Parts

Part Overview

The SC1608F-330 is a 33 µH unshielded wirewound inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 720 mA and maximum DC resistance of 510 mOhm. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent inductance values, current ratings, and electrical characteristics fall within acceptable tolerance ranges for the application, while maintaining compatible mounting and environmental specifications.

Key Parameters

Parameter	Value	Unit
Inductance	33	µH
Inductance Tolerance	±20%	%
Current Rating	720	mA
Saturation Current (Isat)	580	mA
DC Resistance (DCR) Maximum	510	mOhm
Shielding	Unshielded	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-40°C to 125°C	°C
RoHS Status	RoHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SC1608F-330 is determined by the following critical parameters:

Inductance Value: Must be 33 µH with ±20% tolerance
Current Rating: Minimum 720 mA to support the original application
DC Resistance: Must not exceed 510 mOhm to maintain electrical performance
Saturation Current: Must support or exceed 580 mA minimum threshold
Mounting Type: Surface mount configuration required
Environmental Compliance: RoHS compliance and MSL rating must be maintained or improved
Operating Temperature: Must support -40°C minimum; upper limit of 85°C or higher acceptable

The substitute part MP2A-330-R meets these criteria with equivalent inductance, higher current rating (790 mA), lower DC resistance (476 mOhm), and compatible surface mount packaging.

Parameter Comparison

Parameter	SC1608F-330 (Main)	MP2A-330-R (Substitute)	Compatibility
Manufacturer	Signal Transformer	Eaton - Electronics Division	Different manufacturer
Inductance	33 µH	33 µH	Equivalent
Inductance Tolerance	±20%	±20%	Equivalent
Current Rating	720 mA	790 mA	Substitute rated higher
Saturation Current (Isat)	580 mA	790 mA	Substitute rated higher
DC Resistance (DCR)	510 mOhm Max	476 mOhm	Substitute lower (improved)
Type	Wirewound	Drum Core, Wirewound	Compatible construction
Shielding	Unshielded	Unshielded	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Operating Temperature Range	-40°C to 125°C	-40°C to 85°C	Substitute range narrower
RoHS Status	RoHS3 Compliant	RoHS Compliant	Both compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Packaging	Nonstandard	Tape & Reel (TR)	Different packaging format
Physical Size (L x W)	6.60mm x 4.45mm	7.50mm x 5.20mm	Substitute slightly larger
Height - Seated (Max)	2.92mm	1.80mm	Substitute lower profile

Engineering Selection Recommendations

The MP2A-330-R substitute is electrically and functionally compatible with the SC1608F-330 based on the following factors:

Both components maintain Active product status with full regulatory compliance (RoHS, REACH, EAR99 classification)
Electrical parameters (inductance, tolerance, current rating, DC resistance) satisfy or exceed the original specification
Surface mount configuration and unlimited moisture sensitivity rating ensure compatibility with existing assembly processes
The substitute offers improved electrical performance with lower DC resistance (476 mOhm vs. 510 mOhm) and higher current capacity (790 mA vs. 720 mA)

Physical dimensions differ slightly; the MP2A-330-R is larger in footprint (7.50mm x 5.20mm vs. 6.60mm x 4.45mm) but features a lower seated height (1.80mm vs. 2.92mm). PCB layout verification is necessary to confirm fit within available space constraints.

The operating temperature upper limit for MP2A-330-R is 85°C compared to 125°C for the SC1608F-330. Applications requiring sustained operation above 85°C must retain the original SC1608F-330 component.

Frequently Asked Questions (FAQ)

Q: Can MP2A-330-R be used as a direct replacement for SC1608F-330?

A: MP2A-330-R is electrically compatible and meets all critical electrical specifications. Physical dimensions differ; verify PCB layout accommodates the larger footprint (7.50mm x 5.20mm) and lower height (1.80mm). Operating temperature range is reduced to 85°C maximum.

Q: What are the key differences in electrical performance?

A: MP2A-330-R provides improved performance with lower DC resistance (476 mOhm vs. 510 mOhm) and higher current rating (790 mA vs. 720 mA). Both maintain 33 µH inductance with ±20% tolerance and equivalent saturation characteristics above the 580 mA threshold.

Q: Are there packaging considerations for substitution?

A: SC1608F-330 is supplied in nonstandard packaging, while MP2A-330-R is supplied in Tape & Reel (TR) format. Verify compatibility with assembly equipment and handling procedures. Physical footprint and height differences require PCB layout confirmation.

Q: Do both parts meet the same compliance standards?

A: Both components are RoHS compliant with unlimited moisture sensitivity (MSL 1). SC1608F-330 carries RoHS3 designation while MP2A-330-R carries RoHS designation. Both are REACH Unaffected and classified as EAR99 for export control purposes.

Q: What is the maximum operating temperature for each part?

A: SC1608F-330 operates from -40°C to 125°C. MP2A-330-R operates from -40°C to 85°C. Applications requiring operation above 85°C must use the original SC1608F-330 component.

Q: How do the core materials differ?

A: SC1608F-330 uses standard wirewound construction. MP2A-330-R uses drum core wirewound construction with Molybdenum Permalloy (MPP) core material, contributing to improved DC resistance characteristics.

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