RUT2012FR300CS Equivalent & Substitute Parts

Part Overview

The RUT2012FR300CS is a 300 mOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated for 0.25W (1/4W) power dissipation in the 0805 (2012 Metric) package. This component is designed for current sensing applications with moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and package compatibility are maintained across manufacturers. This reference enables procurement flexibility while ensuring functional interchangeability in circuit applications.

Substiute Parts

RUT2012FR300CS

Samsung Electro-MechanicsIn Stock: 788RUT2012FR300CS Datasheet

Current PartRFQ

ERJ-U6QFR30V

Panasonic Electronic ComponentsIn Stock: 19103ERJ-U6QFR30V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RUT2012FR300CS is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Resistance value (300 mOhms), tolerance (±1%), power rating (0.25W), and temperature coefficient (±150ppm/°C) must be identical.

Mechanical Compatibility: Package designation (0805 / 2012 Metric), physical dimensions (0.079" L x 0.049" W), and termination count (2) must match or be within acceptable PCB footprint tolerances.

Environmental & Compliance Requirements: Operating temperature range (-55°C to 155°C), RoHS3 compliance, and MSL rating (1) must be maintained.

Composition & Construction: Thick film construction is required for current sensing applications.

The ERJ-U6QFR30V from Panasonic Electronic Components satisfies all substitution criteria and is classified as an equivalent part.

Parameter Comparison

Engineering Selection Recommendations

Both the RUT2012FR300CS and ERJ-U6QFR30V maintain Active product status and satisfy ROHS3 compliance requirements. The ERJ-U6QFR30V carries AEC-Q200 automotive qualification and anti-sulfur construction, providing additional environmental protection for applications requiring automotive-grade reliability. The seated height difference (0.61mm versus 0.65mm) remains within standard PCB assembly tolerances for 0805 packages.

Selection between these parts should be based on application requirements: the RUT2012FR300CS for general current sensing applications, and the ERJ-U6QFR30V for automotive or high-reliability environments where AEC-Q200 qualification is specified.

Frequently Asked Questions (FAQ)

Q: Can ERJ-U6QFR30V be used as a direct replacement for RUT2012FR300CS?

A: Yes. Both parts share identical electrical specifications (300 mOhms ±1%, 0.25W), operate across the same temperature range (-55°C to 155°C), and are packaged in the 0805 (2012 Metric) form factor. The height difference (0.04mm) does not affect PCB footprint compatibility.

Q: What is the significance of AEC-Q200 qualification on the ERJ-U6QFR30V?

A: AEC-Q200 is an automotive industry standard for passive components. This qualification indicates the ERJ-U6QFR30V has undergone additional reliability testing and environmental stress screening suitable for automotive applications. It is not required for non-automotive applications.

Q: Are there any differences in current sensing performance between these parts?

A: No. Both parts are specified for current sensing applications with identical resistance values, tolerances, and temperature coefficients. Performance in current sensing circuits is equivalent.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. Both parts carry this rating, eliminating moisture-related procurement constraints.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the design does not specifically require AEC-Q200 certification. The electrical and mechanical parameters are equivalent, and both parts meet ROHS3 compliance. No circuit redesign is necessary.