UP0.4SC-3R3-R Equivalent & Substitute Parts

Part Overview

The UP0.4SC-3R3-R is a 3.3 µH shielded wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 0.4SC series. This surface mount component is rated for 1.6 A continuous current with a maximum DC resistance of 55 mOhm and operates across the temperature range of -40°C to 125°C. The component maintains Active product status with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across critical parameters including inductance value, current rating, DC resistance, shielding characteristics, and surface mount package dimensions.

Key Parameters

Parameter	Value	Unit
Inductance	3.3	µH
Inductance Tolerance	±20	%
Current Rating	1.6	A
DC Resistance (Max)	55	mOhm
Shielding	Shielded	—
Q Factor @ 200 kHz	40	—
Self Resonant Frequency	120	MHz
Mounting Type	Surface Mount	—
Operating Temperature Range	-40 to 125	°C
Package Type	Nonstandard	—
Dimensions (L × W)	6.60 × 4.45	mm
Height (Max)	2.92	mm
RoHS Status	RoHS Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the UP0.4SC-3R3-R is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Inductance value: 3.3 µH with ±20% tolerance
Current rating: minimum 1.6 A
DC resistance: maximum 55 mOhm
Shielding: required (shielded configuration)
Q factor @ 200 kHz: 40
Self resonant frequency: 120 MHz

Mechanical Parameters:

Mounting type: Surface Mount
Package dimensions: 6.60 mm length × 4.45 mm width, with height not exceeding 2.92 mm
Packaging format: Tape & Reel (TR)

Compliance Parameters:

Product status: Active
RoHS compliance required
Moisture sensitivity level: MSL 1 (Unlimited)

The SRR6603-3R3ML from Bourns Inc. meets all substitution criteria across these parameters.

Parameter Comparison

Parameter	UP0.4SC-3R3-R (Eaton)	SRR6603-3R3ML (Bourns)	Match Status
Inductance	3.3 µH	3.3 µH	Equivalent
Inductance Tolerance	±20%	±20%	Equivalent
Current Rating	1.6 A	1.6 A	Equivalent
DC Resistance (Max)	55 mOhm	55 mOhm	Equivalent
Shielding	Shielded	Shielded	Equivalent
Q @ 200 kHz	40	40	Equivalent
Self Resonant Frequency	120 MHz	120 MHz	Equivalent
Operating Temperature Range	-40°C to 125°C	-55°C to 125°C	Compatible (Bourns extends lower limit)
Mounting Type	Surface Mount	Surface Mount	Equivalent
Dimensions (L × W)	6.60 × 4.45 mm	6.60 × 4.40 mm	Compatible (width variance 0.05 mm)
Height (Max)	2.92 mm	3.00 mm	Compatible (height variance 0.08 mm)
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Equivalent
RoHS Status	RoHS Compliant	ROHS3 Compliant	Compatible
MSL Rating	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Primary Selection: UP0.4SC-3R3-R (Eaton)

The UP0.4SC-3R3-R remains the primary component choice when available. It is an Active product with full RoHS compliance and established supply chain presence (1047 pcs in stock).

Approved Substitute: SRR6603-3R3ML (Bourns)

The SRR6603-3R3ML is a qualified substitute meeting all electrical and mechanical equivalence criteria. This component is also Active with ROHS3 compliance and demonstrates superior inventory availability (1322 pcs in stock). The extended operating temperature range (-55°C to 125°C versus -40°C to 125°C) provides additional thermal margin. Dimensional variance is within acceptable tolerance for surface mount assembly: width difference of 0.05 mm and height difference of 0.08 mm do not impact PCB layout or reflow processing.

Both components are classified under ECCN EAR99 and HTSUS 8504.50.4000, with identical moisture sensitivity ratings and packaging formats.

Frequently Asked Questions (FAQ)

Q: Can the SRR6603-3R3ML be used as a direct replacement for the UP0.4SC-3R3-R?

A: Yes. Both components share identical electrical specifications (3.3 µH inductance, 1.6 A current rating, 55 mOhm DC resistance, 40 Q @ 200 kHz, 120 MHz self resonant frequency) and equivalent mechanical packaging (Surface Mount, Tape & Reel format). Dimensional differences (0.05 mm width, 0.08 mm height) are within standard PCB assembly tolerances.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on strict equivalence across: inductance value (3.3 µH ±20%), current rating (1.6 A minimum), DC resistance (55 mOhm maximum), shielding requirement, Q factor (40 @ 200 kHz), self resonant frequency (120 MHz), surface mount configuration, package dimensions, and Active product status with RoHS compliance.

Q: Does the Bourns SRR6603-3R3ML have any advantages over the Eaton UP0.4SC-3R3-R?

A: The SRR6603-3R3ML extends the operating temperature range to -55°C (versus -40°C minimum for the Eaton part), providing additional thermal margin for low-temperature applications. Both components are electrically and mechanically equivalent across all other parameters.

Q: Are there any dimensional concerns with the SRR6603-3R3ML?

A: Dimensional differences are minimal and compatible with standard surface mount assembly processes. The Bourns part measures 6.60 × 4.40 mm (versus 6.60 × 4.45 mm for Eaton) with a maximum height of 3.00 mm (versus 2.92 mm). These variances of 0.05 mm and 0.08 mm respectively do not impact PCB layout, reflow processing, or component placement.

Q: What is the moisture sensitivity rating for both components?

A: Both the UP0.4SC-3R3-R and SRR6603-3R3ML carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage, handling, or assembly.

Q: Are both components RoHS compliant?

A: Yes. The UP0.4SC-3R3-R is RoHS Compliant, and the SRR6603-3R3ML is ROHS3 Compliant. Both meet current RoHS requirements.

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