UP2C-102-R Equivalent & Substitute Parts Reference

Part Overview

The UP2C-102-R is a 1 mH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 2C series. This surface mount component is rated for 380 mA continuous current with a DC resistance of 2.657 Ohm and operates across the temperature range of -40°C to 85°C. The component maintains Active product status with RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute components are identified when equivalent inductance values, compatible current ratings, and matching core material specifications are available from alternative manufacturers. Substitution becomes necessary for supply chain continuity, inventory availability, or when original manufacturer lead times exceed project requirements.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Inductance	1	mH	Critical - Must match exactly
Current Rating	380	mA	Critical - Minimum acceptable rating
DC Resistance (DCR)	2.657	Ohm	Important - Affects circuit performance
Core Material	Ferrite	-	Critical - Determines frequency response
Shielding	Unshielded	-	Critical - EMI characteristics
Mounting Type	Surface Mount	-	Critical - PCB assembly compatibility
Operating Temperature Range	-40 to 85	°C	Important - Application environment
RoHS Status	Compliant	-	Important - Regulatory requirement

Substitute Part Grouping Explanation

Substitute components are qualified based on the following criteria derived from the provided specifications:

Inductance Value: The substitute part must maintain the 1 mH inductance specification. This is the primary functional parameter and cannot deviate.

Current Rating: The substitute part current rating must equal or exceed the 380 mA requirement of the UP2C-102-R. The SDR1005-102KL is rated for 300 mA, which is below the original specification.

Core Material: Both parts utilize ferrite drum core construction, ensuring compatible frequency response characteristics and saturation behavior.

Shielding Configuration: Both parts are unshielded, maintaining identical EMI and coupling characteristics.

Mounting Technology: Both components are surface mount devices, compatible with standard PCB assembly processes.

DC Resistance: The UP2C-102-R specifies 2.657 Ohm, while the SDR1005-102KL specifies 3.9 Ohm maximum. This represents a 47% increase in resistance.

Regulatory Compliance: Both parts maintain RoHS compliance status, meeting environmental and hazardous substance restrictions.

Parameter Comparison

Parameter	UP2C-102-R (Eaton)	SDR1005-102KL (Bourns)	Compatibility Notes
Manufacturer	Eaton - Electronics Division	Bourns Inc.	Different manufacturers
Series	UNI-PAC™ 2C	SDR1005	Different product lines
Inductance	1 mH	1 mH	Matched
Inductance Tolerance	±20%	±10%	Substitute has tighter tolerance
Current Rating (Continuous)	380 mA	300 mA	Substitute rated 80 mA lower
Current - Saturation (Isat)	400 mA	350 mA	Substitute rated 50 mA lower
DC Resistance (DCR)	2.657 Ohm	3.9 Ohm Max	Substitute 47% higher resistance
Core Material	Ferrite	Ferrite	Matched
Shielding	Unshielded	Unshielded	Matched
Mounting Type	Surface Mount	Surface Mount	Matched
Operating Temperature	-40 to 85°C	-40 to 125°C	Substitute has wider range
Package Type	Nonstandard	Nonstandard	Matched
Size / Dimension	12.90mm L x 9.40mm W	12.70mm L x 10.00mm W	Dimensions similar, minor variations
Height - Seated (Max)	5.20 mm	5.00 mm	Substitute 0.20 mm lower
RoHS Status	RoHS Compliant	ROHS3 Compliant	Both compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Matched
Product Status	Active	Active	Both actively manufactured

Engineering Selection Recommendations

Primary Consideration - Current Rating Limitation:

The SDR1005-102KL substitute part carries a continuous current rating of 300 mA, which is 80 mA below the UP2C-102-R specification of 380 mA. This represents a 21% reduction in current capacity. The saturation current (Isat) is similarly reduced from 400 mA to 350 mA. Selection of the SDR1005-102KL is appropriate only when circuit operating current remains below 300 mA continuous.

DC Resistance Impact:

The SDR1005-102KL exhibits a maximum DC resistance of 3.9 Ohm compared to the UP2C-102-R at 2.657 Ohm. This 47% increase in resistance will result in proportionally higher power dissipation and voltage drop across the inductor. Circuit designs sensitive to resistive losses or thermal management constraints must account for this difference.

Regulatory and Compliance Status:

Both components maintain Active product status with current manufacturing support. The UP2C-102-R carries RoHS Compliant certification, while the SDR1005-102KL carries ROHS3 Compliant certification. Both certifications satisfy standard environmental and hazardous substance requirements. The SDR1005-102KL additionally carries REACH Unaffected status.

Temperature Operating Range:

The SDR1005-102KL operates across -40°C to 125°C, extending 40°C above the UP2C-102-R maximum of 85°C. This wider range provides additional thermal margin for applications operating at elevated ambient temperatures.

Physical Dimensions:

Both components maintain similar nonstandard package dimensions suitable for surface mount assembly. The SDR1005-102KL is marginally smaller in height (5.00 mm vs. 5.20 mm) and slightly larger in width (10.00 mm vs. 9.40 mm), with negligible impact on PCB layout compatibility.

Inductance Tolerance:

The SDR1005-102KL provides ±10% inductance tolerance compared to the UP2C-102-R at ±20%. This tighter tolerance specification may benefit applications requiring more precise inductance values.

Frequently Asked Questions (FAQ)

Q: Can the SDR1005-102KL directly replace the UP2C-102-R in all applications?

A: No. The SDR1005-102KL is rated for 300 mA continuous current, while the UP2C-102-R is rated for 380 mA. Direct substitution is limited to circuits where operating current does not exceed 300 mA. Applications requiring the full 380 mA rating must use the original UP2C-102-R or identify alternative parts with equivalent or higher current specifications.

Q: How does the higher DC resistance of the SDR1005-102KL affect circuit performance?

A: The SDR1005-102KL exhibits 3.9 Ohm maximum DC resistance compared to 2.657 Ohm for the UP2C-102-R. This 47% increase results in higher resistive losses, increased voltage drop, and greater heat dissipation. In circuits where the inductor carries significant current, this resistance increase may require thermal analysis and potentially affect circuit efficiency or performance characteristics.

Q: Are both parts RoHS compliant?

A: Yes. The UP2C-102-R carries RoHS Compliant certification, and the SDR1005-102KL carries ROHS3 Compliant certification. Both meet current environmental and hazardous substance restrictions. The SDR1005-102KL additionally carries REACH Unaffected status.

Q: What are the physical dimension differences between these parts?

A: The UP2C-102-R measures 12.90mm length x 9.40mm width x 5.20mm height (seated). The SDR1005-102KL measures 12.70mm length x 10.00mm width x 5.00mm height (seated). Differences are minor and typically do not impact PCB layout compatibility for standard surface mount assembly.

Q: Which part has better inductance tolerance?

A: The SDR1005-102KL provides ±10% inductance tolerance, compared to ±20% for the UP2C-102-R. The tighter tolerance of the Bourns part may be advantageous in applications requiring more precise inductance values.

Q: Can the SDR1005-102KL be used in high-temperature applications?

A: The SDR1005-102KL operates across -40°C to 125°C, compared to -40°C to 85°C for the UP2C-102-R. The Bourns part provides 40°C additional thermal margin and is suitable for applications operating at elevated ambient temperatures up to 125°C.

Q: What is the packaging format for the SDR1005-102KL?

A: The SDR1005-102KL is supplied in Tape & Reel (TR) packaging format, suitable for automated PCB assembly processes. The UP2C-102-R packaging format is not specified in the provided data.

Q: Are both parts currently in active production?

A: Yes. Both the UP2C-102-R and SDR1005-102KL maintain Active product status with current manufacturing support from their respective manufacturers.

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