RUT2012JR180CS Equivalent & Substitute Parts

Part Overview

The RUT2012JR180CS is a 180 milliohm thick film chip resistor manufactured by Samsung Electro-Mechanics. This 0805 (2012 metric) package component is rated for 0.25W (1/4W) power dissipation with ±5% tolerance and is designed for current sensing applications in moisture-resistant configurations. The part maintains active product status and is RoHS3 compliant with MSL 1 (unlimited moisture sensitivity level). Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, application-specific certifications, or design optimization needs.

Substiute Parts

RUT2012JR180CS

Samsung Electro-MechanicsIn Stock: 815RUT2012JR180CS Datasheet

Current PartRFQ

ERJ-6DSFR18V

Panasonic Electronic ComponentsIn Stock: 22119ERJ-6DSFR18V Datasheet

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ERJ-6DSJR18V

Panasonic Electronic ComponentsIn Stock: 15574ERJ-6DSJR18V Datasheet

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ERJ-U6SFR18V

Panasonic Electronic ComponentsIn Stock: 20307ERJ-U6SFR18V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RUT2012JR180CS is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Resistance value: 180 mOhms (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)
• Number of Terminations: 2 (exact match required)

Allowable Variations:

• Tolerance: ±5% or tighter (±1% acceptable as superior specification)
• Power Rating: 0.25W or higher (0.5W acceptable as superior specification)
• Temperature Coefficient: ±150ppm/°C or equivalent
• Features: Current Sense capability required; additional features (Automotive AEC-Q200, Anti-Sulfur) acceptable
• Compliance: RoHS3 and REACH status must match or exceed

All three identified substitute parts meet these criteria while maintaining full mechanical and electrical compatibility with the RUT2012JR180CS.

Parameter Comparison

Engineering Selection Recommendations

ERJ-6DSFR18V (Panasonic) — Direct substitute with enhanced specifications. This part provides ±1% tolerance (tighter than the ±5% original specification) and 0.5W power rating (double the original 0.25W rating). Automotive AEC-Q200 certification provides additional qualification for demanding applications. Height increase from 0.61mm to 0.70mm requires PCB layout verification for clearance-critical designs. Suitable for applications requiring improved accuracy and thermal headroom.

ERJ-6DSJR18V (Panasonic) — Direct substitute with matching tolerance and enhanced power rating. This part maintains the ±5% tolerance specification of the original while providing 0.5W power rating. Automotive AEC-Q200 certification is included. Height increase to 0.70mm requires the same clearance verification as ERJ-6DSFR18V. Recommended for applications where tolerance matching is critical and additional power dissipation capability is beneficial.

ERJ-U6SFR18V (Panasonic) — Direct substitute with enhanced tolerance and anti-sulfur protection. This part provides ±1% tolerance and maintains the 0.25W power rating of the original. Anti-sulfur feature provides additional environmental protection for corrosive atmospheres. Automotive AEC-Q200 certification is included. Height of 0.65mm falls between the original and the higher-power alternatives, minimizing clearance concerns. Suitable for applications requiring tighter tolerance and enhanced environmental resistance.

All three substitute parts maintain full electrical and mechanical compatibility with the RUT2012JR180CS within the specified operating parameters. Selection should be based on application-specific requirements for tolerance, power dissipation, environmental protection, and automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can ERJ-6DSFR18V replace RUT2012JR180CS in a current sensing circuit?

A: Yes. Both parts have identical 180 mOhm resistance, 0805 package, thick film composition, and -55°C to 155°C operating range. The ERJ-6DSFR18V provides superior ±1% tolerance and 0.5W power rating. Verify PCB clearance for the increased height of 0.70mm versus 0.61mm.

Q: What is the difference between ERJ-6DSJR18V and ERJ-6DSFR18V?

A: Both are Panasonic 0805 180 mOhm thick film resistors with 0.5W power rating and AEC-Q200 certification. The primary difference is tolerance: ERJ-6DSJR18V is ±5% (matching the original RUT2012JR180CS), while ERJ-6DSFR18V is ±1% (tighter tolerance). Select based on circuit accuracy requirements.

Q: Is ERJ-U6SFR18V suitable for moisture-sensitive applications?

A: Yes. ERJ-U6SFR18V has MSL 1 (unlimited) rating, identical to the RUT2012JR180CS. The anti-sulfur feature provides additional protection in corrosive environments. Both parts are suitable for moisture-sensitive applications.

Q: Will the increased height of Panasonic substitutes cause PCB assembly issues?

A: The Panasonic ERJ-6D series parts have maximum seated heights of 0.70mm compared to 0.61mm for the RUT2012JR180CS. The ERJ-U6SFR18V is 0.65mm. Verify clearance with your PCB design, solder reflow profile, and component placement constraints. Height differences are within typical 0805 package tolerances but should be confirmed for space-constrained designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. RUT2012JR180CS, ERJ-6DSFR18V, ERJ-6DSJR18V, and ERJ-U6SFR18V are all ROHS3 compliant with REACH unaffected status. All parts meet current environmental compliance requirements.

Q: Can I use a 0.5W rated substitute in place of a 0.25W rated original?

A: Yes. A higher power rating is a superior specification and provides additional thermal margin. The 0.5W rated ERJ-6DSFR18V and ERJ-6DSJR18V can replace the 0.25W RUT2012JR180CS without derating concerns. Verify that the increased component height does not create PCB layout conflicts.

Q: What is the significance of AEC-Q200 certification on the Panasonic parts?

A: AEC-Q200 is an automotive qualification standard. All three Panasonic substitutes carry this certification, indicating they meet automotive reliability and performance standards. This certification is not present on the original RUT2012JR180CS but does not prevent substitution; it represents an additional qualification level.

Q: Are temperature coefficients equivalent across all four parts?

A: The RUT2012JR180CS and ERJ-U6SFR18V both specify ±150ppm/°C. The ERJ-6DSFR18V and ERJ-6DSJR18V specify 0/+150ppm/°C, which represents a tighter specification (unidirectional rather than bidirectional). Both specifications are compatible for current sensing applications within the -55°C to 155°C operating range.