UP2SC-390-R Equivalent & Substitute Parts

Part Overview

The UP2SC-390-R is a 39 µH shielded wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 2SC series. This component is rated for 1.05 A continuous current with a maximum DC resistance of 180mOhm and operates across the temperature range of -25°C to 85°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Inductance	39	µH
Inductance Tolerance	±15	%
Current Rating	1.05	A
DC Resistance (Max)	180	mOhm
Shielding	Shielded	—
Mounting Type	Surface Mount	—
Physical Size	12.70 x 10.00 x 5.20	mm (L x W x H)
Operating Temperature Range	-25 to 85	°C
Moisture Sensitivity Level	1	—

Substitute Part Grouping Explanation

Substitution of the UP2SC-390-R is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Inductance value: 39 µH
Inductance tolerance: ±15%
Current rating: 1.05 A minimum
DC resistance: 180mOhm maximum
Shielding: Shielded construction required
Mounting type: Surface Mount
Physical dimensions: 12.70mm L x 10.00mm W x 5.20mm H maximum seated height
Moisture sensitivity level: MSL 1 or better

The SRR1005-390Y from Bourns Inc. meets all mandatory parameters and is classified as an active product with current manufacturing support and inventory availability.

Parameter Comparison

Parameter	UP2SC-390-R (Eaton)	SRR1005-390Y (Bourns)	Match Status
Inductance	39 µH	39 µH	Equivalent
Inductance Tolerance	±15%	±15%	Equivalent
Current Rating	1.05 A	1.05 A	Equivalent
DC Resistance (Max)	180 mOhm	180 mOhm	Equivalent
Current - Saturation	1.73 A	1.4 A	Substitute lower
Shielding	Shielded	Shielded	Equivalent
Type	Wirewound	Drum Core, Wirewound	Compatible
Material - Core	Not specified	Ferrite	—
Q @ Frequency	70 @ 100 kHz	40 @ 2.52 MHz	Different test conditions
Frequency - Self Resonant	12 MHz	13 MHz	Similar
Operating Temperature Range	-25 to 85°C	-40 to 125°C	Substitute wider range
Size / Dimension	12.70 x 10.00 mm	12.70 x 10.00 mm	Equivalent
Height - Seated (Max)	5.20 mm	5.20 mm	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute active
RoHS Status	Not specified	ROHS3 Compliant	—

Engineering Selection Recommendations

The SRR1005-390Y from Bourns Inc. is the qualified substitute for the obsolete UP2SC-390-R. Selection is based on the following engineering criteria:

Electrical Equivalence: Both components provide identical inductance (39 µH ±15%), current rating (1.05 A), and DC resistance (180mOhm maximum). The saturation current of the SRR1005-390Y is 1.4 A compared to 1.73 A for the UP2SC-390-R; this represents a lower margin but remains above the rated continuous current.

Physical Compatibility: Identical footprint dimensions (12.70mm x 10.00mm) and seated height (5.20mm maximum) ensure direct PCB layout compatibility without redesign.

Product Status and Support: The SRR1005-390Y is an active product with current manufacturing support and documented inventory availability (1038 pieces in stock). The UP2SC-390-R is obsolete with limited remaining stock (1060 pieces).

Compliance and Certifications: The SRR1005-390Y carries ROHS3 compliance and REACH unaffected status. Both components share identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications.

Temperature Range: The SRR1005-390Y operates across -40°C to 125°C, providing extended low-temperature performance beyond the UP2SC-390-R specification of -25°C to 85°C.

Frequently Asked Questions (FAQ)

Q: Can the SRR1005-390Y be used as a direct replacement for UP2SC-390-R without PCB modification?

A: Yes. Both components share identical physical dimensions (12.70mm x 10.00mm footprint, 5.20mm maximum seated height) and surface mount configuration. No PCB layout changes are required.

Q: What is the difference in saturation current between these parts?

A: The UP2SC-390-R has a saturation current (Isat) of 1.73 A, while the SRR1005-390Y has an Isat of 1.4 A. Both exceed the rated continuous current of 1.05 A. The SRR1005-390Y provides a lower saturation margin but remains within acceptable operating parameters for this current rating.

Q: Are there differences in frequency response characteristics?

A: The Q factor measurements are taken at different frequencies (UP2SC-390-R at 100 kHz, SRR1005-390Y at 2.52 MHz), making direct comparison invalid. Self-resonant frequencies are similar (12 MHz vs. 13 MHz). For frequency-dependent applications, verify performance at your specific operating frequency.

Q: Does the SRR1005-390Y meet environmental compliance requirements?

A: Yes. The SRR1005-390Y is ROHS3 compliant and REACH unaffected. Both components carry identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications.

Q: What is the packaging difference?

A: The UP2SC-390-R packaging is listed as nonstandard. The SRR1005-390Y is supplied in Tape & Reel (TR) format, which is standard for surface mount component distribution.

Q: Is the extended temperature range of SRR1005-390Y (-40 to 125°C) a concern for applications designed for -25 to 85°C?

A: No. The extended range of the SRR1005-390Y is a superset of the UP2SC-390-R specification. Applications designed for the narrower range will operate within the qualified envelope of the substitute part.

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