RUW2012FR010CS Equivalent & Substitute Parts

Part Overview

The RUW2012FR010CS is a 10 milliohm, ±1% tolerance, 0.5W thick film chip resistor in 0805 (2012 metric) package manufactured by Samsung Electro-Mechanics. This component is designed for current sensing applications with moisture-resistant characteristics. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement continuity.

Substiute Parts

RUW2012FR010CS

Samsung Electro-MechanicsIn Stock: 870RUW2012FR010CS Datasheet

Current PartRFQ

RUK2012FR010CS

Samsung Electro-MechanicsIn Stock: 706RUK2012FR010CS Datasheet

UpgradeRFQ

ERJ-6CWFR010V

Panasonic Electronic ComponentsIn Stock: 19673ERJ-6CWFR010V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RUW2012FR010CS is determined by the following critical parameters:

Primary Substitution Criteria:

• Resistance value: 10 mOhms
• Tolerance: ±1%
• Power rating: 0.5W minimum
• Package: 0805 (2012 metric)
• Composition: Thick film
• Application: Current sense capability

Grouping Logic:

Upgrade Substitute (Direct Replacement): RUK2012FR010CS meets all primary substitution criteria with identical electrical specifications and package dimensions. This part represents an active product status upgrade from the obsolete RUW series, with improved temperature coefficient performance (±100ppm/°C vs. ±600ppm/°C).

Similar Substitute (Cross-Compatible): ERJ-6CWFR010V from Panasonic meets all primary substitution criteria with identical resistance, tolerance, power rating, and package type. This part includes automotive AEC-Q200 qualification and demonstrates superior temperature coefficient (±75ppm/°C). Minor dimensional variations exist within acceptable mechanical tolerances for 0805 package class.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred):

RUK2012FR010CS is the recommended substitute for RUW2012FR010CS. Both components are manufactured by Samsung Electro-Mechanics and share identical electrical specifications, package dimensions, and compliance certifications. The RUK series upgrade provides improved temperature coefficient stability (±100ppm/°C) while maintaining active product status and ROHS3 compliance. This substitution requires no circuit redesign or layout modification.

For Cross-Platform Applications:

ERJ-6CWFR010V from Panasonic is suitable for applications requiring automotive-grade qualification. This part meets all primary electrical and mechanical substitution criteria with superior temperature coefficient performance (±75ppm/°C). The minor dimensional increase (0.030" vs. 0.026" maximum height) and reduced upper operating temperature limit (-55°C ~ 125°C vs. -55°C ~ 155°C) must be evaluated against specific application requirements. AEC-Q200 qualification provides additional reliability assurance for automotive and industrial environments.

Compliance Considerations:

All three components maintain ROHS3 compliance, MSL rating 1 (unlimited moisture sensitivity), and REACH unaffected status. Selection between active substitutes should prioritize procurement availability, supply chain stability, and application-specific environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can RUK2012FR010CS directly replace RUW2012FR010CS without circuit modification?

A: Yes. RUK2012FR010CS is a direct substitute with identical resistance (10 mOhms), tolerance (±1%), power rating (0.5W), package (0805), and physical dimensions. No circuit redesign is required.

Q: What is the primary difference between RUW2012FR010CS and RUK2012FR010CS?

A: The RUK series provides improved temperature coefficient stability (±100ppm/°C vs. ±600ppm/°C) and active product status. Both maintain identical electrical performance and package specifications.

Q: Is ERJ-6CWFR010V compatible with designs specified for RUW2012FR010CS?

A: ERJ-6CWFR010V meets all primary electrical substitution criteria (10 mOhms, ±1%, 0.5W, 0805 package). However, two design considerations apply: (1) Maximum seated height increases from 0.026" to 0.030", and (2) upper operating temperature limit reduces from 155°C to 125°C. Verify these parameters against application requirements before selection.

Q: Why does ERJ-6CWFR010V have different physical dimensions despite identical package designation?

A: Both components conform to 0805 (2012 metric) package class specifications, which allow dimensional tolerances within the standard. The ERJ-6CWFR010V dimensions (2.05mm x 1.30mm length/width, 0.75mm height) remain within 0805 class tolerances and are mechanically compatible with standard 0805 footprints.

Q: Which substitute should be selected for high-temperature applications?

A: RUW2012FR010CS and RUK2012FR010CS both support -55°C ~ 155°C operating range. ERJ-6CWFR010V is limited to -55°C ~ 125°C. For applications requiring operation above 125°C, select either Samsung component.

Q: Are all three components suitable for current sensing applications?

A: Yes. RUW2012FR010CS, RUK2012FR010CS, and ERJ-6CWFR010V all include current sense capability as specified in their feature sets. All three are appropriate for current sensing circuit implementations.

Q: What packaging formats are available for these substitutes?

A: RUW2012FR010CS is available in standard packaging (format not specified). RUK2012FR010CS is supplied in Tape & Reel (TR) format. ERJ-6CWFR010V is available in Cut Tape (CT) and Digi-Reel® formats. Verify packaging compatibility with procurement and assembly requirements.