UP0.4UC-2R2-R Equivalent & Substitute Parts

Part Overview

The UP0.4UC-2R2-R is a 2.2 µH unshielded wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 0.4UC series. This surface mount component is designed for applications requiring fixed inductance with a current rating of 2.4 A and maximum DC resistance of 70 mOhm. The part is currently active in production with RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent substitute parts are identified when they maintain identical electrical specifications, mechanical dimensions, and mounting compatibility while meeting the same regulatory standards.

Key Parameters

Parameter	Value
Inductance	2.2 µH
Inductance Tolerance	±20%
Current Rating	2.4 A
Saturation Current (Isat)	2.3 A
DC Resistance (DCR)	70 mOhm Max
Shielding	Unshielded
Mounting Type	Surface Mount
Package Dimensions	0.260" L x 0.175" W x 0.115" H (6.60mm x 4.45mm x 2.92mm)
Operating Temperature Range	-25°C ~ 85°C
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the UP0.4UC-2R2-R is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

Inductance value: 2.2 µH with ±20% tolerance
Current rating: 2.4 A minimum
Saturation current: 2.3 A minimum
DC resistance: 70 mOhm maximum
Inductance test frequency: 100 kHz

Mechanical Equivalence Requirements:

Surface mount package type
Physical dimensions: 0.260" L x 0.175" W x 0.115" H maximum
Nonstandard package classification

Regulatory & Environmental Equivalence:

RoHS compliance (RoHS 2 or RoHS 3)
MSL 1 rating (unlimited moisture sensitivity)
ECCN EAR99 classification

The substitute part 74455022 from Würth Elektronik meets all electrical, mechanical, and regulatory criteria for direct substitution in the UP0.4UC-2R2-R application.

Parameter Comparison

Parameter	UP0.4UC-2R2-R (Eaton)	74455022 (Würth Elektronik)	Match Status
Inductance	2.2 µH	2.2 µH	Equivalent
Inductance Tolerance	±20%	±20%	Equivalent
Current Rating (Amps)	2.4 A	2.4 A	Equivalent
Saturation Current (Isat)	2.3 A	2.3 A	Equivalent
DC Resistance (DCR)	70 mOhm Max	70 mOhm Max	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Dimensions	0.260" L x 0.175" W x 0.115" H	0.260" L x 0.175" W x 0.115" H	Equivalent
Operating Temperature	-25°C ~ 85°C	-40°C ~ 100°C	Substitute Range Wider
RoHS Status	RoHS Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	MSL 1	MSL 1	Equivalent
Product Status	Active	Active	Equivalent
Inductance Test Frequency	100 kHz	100 kHz	Equivalent

Engineering Selection Recommendations

Primary Part: UP0.4UC-2R2-R

The UP0.4UC-2R2-R remains the primary specification when Eaton component qualification is required or when supply chain continuity with the original manufacturer is necessary. This part is actively produced and maintains full RoHS compliance.

Substitute Part: 74455022 (Würth Elektronik WE-PD4 Series)

The 74455022 is a direct electrical and mechanical equivalent suitable for applications where component sourcing flexibility is required. This substitute offers the following characteristics:

Identical electrical performance across all critical parameters
Identical physical footprint and mounting compatibility
Extended operating temperature range (-40°C ~ 100°C vs. -25°C ~ 85°C)
ROHS3 compliance (newer RoHS standard revision)
Ferrite drum core construction (vs. unspecified core material in primary part)
Higher inventory availability (15,350 pcs vs. 841 pcs)

Selection between these parts should be based on supply availability, lead time requirements, and any specific manufacturer qualification mandates in the application design documentation.

Frequently Asked Questions (FAQ)

Q: Can the 74455022 be used as a direct replacement for UP0.4UC-2R2-R in production?

A: Yes. The 74455022 meets all electrical specifications (2.2 µH inductance, 2.4 A current rating, 70 mOhm DCR), maintains identical physical dimensions (0.260" x 0.175" x 0.115"), and shares the same surface mount package type. Both parts are RoHS compliant and carry MSL 1 rating.

Q: What is the difference in core material between these parts?

A: The UP0.4UC-2R2-R core material is not specified in the technical data. The 74455022 uses a ferrite drum core construction. Both achieve identical inductance and current handling specifications at the 100 kHz test frequency.

Q: Does the extended temperature range of the 74455022 affect compatibility?

A: No. The 74455022 operating range (-40°C ~ 100°C) encompasses the UP0.4UC-2R2-R range (-25°C ~ 85°C). Extended temperature capability does not create incompatibility; it provides additional operational margin.

Q: Are there any PCB layout considerations when switching between these parts?

A: No. Both parts share identical footprint dimensions (0.260" L x 0.175" W) and maximum seated height (0.115"). PCB layouts designed for either part are directly compatible with the other.

Q: What is the significance of the ±20% inductance tolerance?

A: Both parts carry ±20% tolerance, meaning the actual inductance value will fall between 1.76 µH and 2.64 µH. This tolerance applies equally to both the primary and substitute part, ensuring equivalent circuit performance.

Q: How do the saturation current specifications affect part selection?

A: Both parts specify 2.3 A saturation current, which is slightly lower than the 2.4 A continuous current rating. This indicates the inductor will begin to saturate at 2.3 A. Applications must not exceed this threshold regardless of which part is selected.

Q: Is REACH compliance information available for the UP0.4UC-2R2-R?

A: REACH status is not specified for the UP0.4UC-2R2-R. The 74455022 is listed as REACH Unaffected, indicating it contains no substances of very high concern (SVHC) on the REACH candidate list.

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