RUT2012FR390CS Equivalent & Substitute Parts

Part Overview

The RUT2012FR390CS is a 390 mOhms ±1% 0.25W thick film chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. 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 711 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when supply chain optimization is required.

Substiute Parts

RUT2012FR390CS

Samsung Electro-MechanicsIn Stock: 748RUT2012FR390CS Datasheet

Current PartRFQ

ERJ-U6QFR39V

Panasonic Electronic ComponentsIn Stock: 20035ERJ-U6QFR39V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RUT2012FR390CS is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 390 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W minimum
• Temperature coefficient: ±150ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C minimum (exact match required)

Mechanical Parameters:

• Package: 0805 (2012 Metric) form factor
• Composition: Thick film construction
• Termination count: 2 terminations
• Physical dimensions: 2.00mm L x 1.25mm W (maximum seated height ≤0.65mm acceptable)

Compliance Parameters:

• RoHS3 compliance required
• Moisture Sensitivity Level 1 (Unlimited) required
• REACH Unaffected status required

The ERJ-U6QFR39V from Panasonic Electronic Components satisfies all substitution criteria across electrical, mechanical, and compliance parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the RUT2012FR390CS and ERJ-U6QFR39V are Active status products meeting identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain requirements:

RUT2012FR390CS (Samsung Electro-Mechanics): Current inventory of 711 units. Suitable for applications requiring moisture-resistant thick film construction with current sense capability.

ERJ-U6QFR39V (Panasonic Electronic Components): Current inventory of 19,995 units. Includes AEC-Q200 automotive qualification and anti-sulfur features. Suitable for automotive applications and high-volume production requiring extended supply assurance.

Both parts comply with ROHS3 and REACH requirements. The maximum seated height difference (0.60mm vs 0.65mm) is within typical PCB assembly tolerances for 0805 packages and does not restrict interchangeability in standard applications.

Frequently Asked Questions (FAQ)

Q: Can ERJ-U6QFR39V replace RUT2012FR390CS in all applications?

A: Yes. Both parts meet identical electrical specifications (390 mOhms ±1%, 0.25W, ±150ppm/°C, -55°C ~ 155°C) and mechanical requirements (0805 package, 2 terminations, Thick Film composition). The 0.05mm height difference is within standard PCB assembly tolerances.

Q: What is the significance of AEC-Q200 qualification on the Panasonic part?

A: AEC-Q200 is an automotive industry qualification standard. The ERJ-U6QFR39V meets this standard, making it suitable for automotive applications. The RUT2012FR390CS does not carry this designation but remains suitable for non-automotive applications.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 Compliant, REACH Unaffected, and carry Moisture Sensitivity Level 1 (Unlimited). Compliance status is identical.

Q: What does "Moisture Sensitivity Level 1" mean?

A: MSL 1 indicates unlimited shelf life without moisture control requirements. Both parts can be stored and handled without special moisture-barrier packaging or baking procedures prior to assembly.

Q: Why would I choose the Samsung part over the Panasonic part given lower inventory?

A: Selection depends on application requirements and supply chain strategy. The Samsung RUT2012FR390CS is suitable when non-automotive specifications are sufficient. The Panasonic ERJ-U6QFR39V provides higher inventory availability and automotive qualification for applications requiring these features.

Q: Are the physical dimensions identical?

A: Dimensions are equivalent for PCB assembly purposes. Both parts measure 2.00mm L x 1.25mm W. Maximum seated height differs by 0.05mm (0.60mm vs 0.65mm), which is negligible for standard 0805 package applications.

Q: Can these parts be used interchangeably in current sense applications?

A: Yes. Both parts are specified for current sense applications with identical resistance tolerance (±1%) and temperature coefficient (±150ppm/°C), ensuring equivalent performance in current measurement circuits.