RUT2012FR180CS Equivalent & Substitute Parts Reference

Part Overview

The RUT2012FR180CS is a 180 mOhms ±1% 0.25W thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0805 (2012 Metric) package. This current sense resistor is designed for precision low-resistance applications requiring moisture resistance and tight tolerance specifications. The part maintains Active product status with 721 units in current inventory. Substitute parts are identified to address application requirements including automotive qualification, enhanced environmental protection, or alternative power ratings while maintaining core electrical specifications.

Substiute Parts

RUT2012FR180CS

Samsung Electro-MechanicsIn Stock: 754RUT2012FR180CS Datasheet

Current PartRFQ

ERJ-6DSFR18V

Panasonic Electronic ComponentsIn Stock: 22119ERJ-6DSFR18V Datasheet

SimilarRFQ

ERJ-U6SFR18V

Panasonic Electronic ComponentsIn Stock: 20307ERJ-U6SFR18V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Primary Substitution Criteria (Non-Negotiable):

• Resistance value: 180 mOhms
• Tolerance: ±1%
• Package: 0805 (2012 Metric)
• Composition: Thick Film
• Operating temperature range: -55°C ~ 155°C minimum
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Secondary Compatibility Parameters (Allowed Variation):

• Power rating: 0.25W or higher (uprating permitted)
• Temperature coefficient: ±150ppm/°C or tighter
• Manufacturer: Different manufacturers permitted
• Features: Additional certifications or environmental protections permitted (automotive AEC-Q200, anti-sulfur)

Identified Substitute Parts:

1. ERJ-6DSFR18V (Panasonic Electronic Components): Meets all primary criteria with 0.5W power rating (higher capacity) and automotive AEC-Q200 qualification.

2. ERJ-U6SFR18V (Panasonic Electronic Components): Meets all primary criteria with identical 0.25W power rating and adds automotive AEC-Q200 and anti-sulfur features.

Parameter Comparison

Engineering Selection Recommendations

RUT2012FR180CS Selection Criteria:

• Primary choice for applications requiring exact 0.25W power dissipation specification
• Suitable for standard industrial current sense applications
• Moisture resistant composition for general environmental protection
• ROHS3 compliant for regulatory requirements

ERJ-6DSFR18V Selection Criteria:

• Select when higher power dissipation capacity (0.5W) is required or beneficial
• Mandatory for automotive applications requiring AEC-Q200 qualification
• Panasonic automotive-grade manufacturing process
• Temperature coefficient range 0/+150ppm/°C provides tighter positive temperature stability

ERJ-U6SFR18V Selection Criteria:

• Select for automotive applications requiring AEC-Q200 qualification with exact 0.25W power rating match
• Anti-sulfur feature provides enhanced environmental protection in corrosive atmospheres
• Identical power rating to main part ensures thermal design compatibility
• Temperature coefficient ±150ppm/°C matches main part specification

All three parts share identical electrical core specifications (180 mOhms, ±1%, 0805 package, thick film composition) and regulatory compliance (ROHS3, MSL 1). Selection between them depends on automotive qualification requirements and environmental protection needs rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can ERJ-6DSFR18V replace RUT2012FR180CS in a 0.25W thermal design?

A: Yes. The ERJ-6DSFR18V has a 0.5W power rating, which exceeds the 0.25W requirement. Higher power ratings are compatible with lower-power designs. The component will operate within thermal limits with margin. Physical dimensions are compatible (0805 package), with maximum seated height of 0.028" (0.70mm) compared to 0.024" (0.61mm) for the main part.

Q: What is the difference between ERJ-6DSFR18V and ERJ-U6SFR18V?

A: Both are Panasonic automotive-grade (AEC-Q200) 180 mOhms ±1% 0805 resistors. ERJ-6DSFR18V has 0.5W power rating with temperature coefficient 0/+150ppm/°C. ERJ-U6SFR18V has 0.25W power rating (matching the main part) with temperature coefficient ±150ppm/°C and adds anti-sulfur protection. Choose ERJ-U6SFR18V for exact power rating match; choose ERJ-6DSFR18V for higher thermal capacity.

Q: Are all three parts suitable for automotive applications?

A: RUT2012FR180CS and ERJ-U6SFR18V are suitable for general industrial use. Only ERJ-6DSFR18V and ERJ-U6SFR18V carry AEC-Q200 automotive qualification. For automotive applications, select ERJ-6DSFR18V or ERJ-U6SFR18V.

Q: What does MSL 1 (Unlimited) mean for these resistors?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and does not require special moisture-controlled storage. All three parts share this rating, eliminating moisture sensitivity as a selection factor.

Q: Can I use these parts interchangeably on the same PCB?

A: Yes, within the constraints of your thermal design. All three parts use the 0805 (2012 Metric) package with identical footprint dimensions (0.079" L x 0.049" W). Maximum seated heights vary slightly (0.024" to 0.028"), which is negligible for standard PCB assembly. Electrical specifications (180 mOhms, ±1%, -55°C ~ 155°C) are identical across all three parts.

Q: Which part should I select for new designs?

A: For new designs, evaluate based on application requirements: (1) If automotive qualification is required, select ERJ-U6SFR18V (0.25W with anti-sulfur) or ERJ-6DSFR18V (0.5W). (2) If higher thermal margin is beneficial, select ERJ-6DSFR18V. (3) If exact power rating match and anti-sulfur protection are required, select ERJ-U6SFR18V. (4) For non-automotive industrial applications without special environmental requirements, RUT2012FR180CS is appropriate.