RUT2012FR910CS Equivalent & Substitute Parts

Part Overview

The RUT2012FR910CS is a 910 mOhms ±1% 0.25W chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. This thick film current sense resistor is designed for precision applications requiring low resistance values with tight tolerance specifications. The component is actively produced and widely used in power management, battery charging, and current monitoring circuits. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, supply chain considerations, or application-specific certifications.

Key Parameters

Parameter	Value
Resistance	910 mOhms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Package Type	0805 (2012 Metric)
Composition	Thick Film
Temperature Coefficient	±150ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RUT2012FR910CS is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Resistance value: 910 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) (exact match required)
Number of terminations: 2 (exact match required)
Physical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) (exact match required)

Compliance Parameters:

RoHS3 Compliant status
Moisture Sensitivity Level 1 (Unlimited)
Thick film composition

The substitute part ERJ-U6QFR91V meets all electrical and mechanical equivalence criteria. Differences in application-specific features (current sense vs. anti-sulfur/automotive) do not affect core substitutability when electrical and mechanical parameters are identical.

Parameter Comparison

Parameter	RUT2012FR910CS (Samsung)	ERJ-U6QFR91V (Panasonic)	Match Status
Resistance	910 mOhms	910 mOhms	Equivalent
Tolerance	±1%	±1%	Equivalent
Power Rating	0.25W	0.25W	Equivalent
Package	0805 (2012 Metric)	0805 (2012 Metric)	Equivalent
Composition	Thick Film	Thick Film	Equivalent
Temperature Coefficient	±150ppm/°C	±150ppm/°C	Equivalent
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	Equivalent
Terminations	2	2	Equivalent
Physical Dimensions	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)	Equivalent
Height - Seated (Max)	0.024" (0.61mm)	0.026" (0.65mm)	Within tolerance
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

RUT2012FR910CS (Samsung Electro-Mechanics):

Primary selection for current sense applications requiring moisture-resistant thick film construction
ROHS3 compliant with unlimited moisture sensitivity rating
Active product status with 951 units in stock
Suitable for general industrial and consumer applications

ERJ-U6QFR91V (Panasonic Electronic Components):

Alternative selection for automotive and harsh environment applications
AEC-Q200 automotive qualification with anti-sulfur protection
ROHS3 compliant with unlimited moisture sensitivity rating
Active product status with 1436 units in stock
Marginal height difference (0.026" vs. 0.024") remains within standard PCB assembly tolerances

Both parts satisfy identical electrical and mechanical substitution criteria. Selection between them is determined by application-specific requirements: Samsung RUT2012FR910CS for standard current sensing applications, Panasonic ERJ-U6QFR91V for automotive or corrosive environment exposure.

Frequently Asked Questions (FAQ)

Q: Can ERJ-U6QFR91V replace RUT2012FR910CS in any application?

A: Yes, when electrical and mechanical parameters are the primary selection criteria. Both parts are 910 mOhms ±1% 0.25W resistors in 0805 package with identical temperature coefficients and operating ranges. The Panasonic part includes automotive AEC-Q200 qualification and anti-sulfur features, which provide additional protection in specific environments but do not affect core electrical performance.

Q: What is the significance of the height difference (0.024" vs. 0.026")?

A: The 0.002" (0.04mm) height difference is within standard PCB assembly tolerances and does not affect board-level compatibility. Both parts are suitable for standard 0805 package footprints without design modification.

Q: Are both parts RoHS3 compliant?

A: Yes. Both RUT2012FR910CS and ERJ-U6QFR91V are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting environmental and regulatory requirements for industrial and consumer applications.

Q: What does AEC-Q200 qualification mean for the Panasonic part?

A: AEC-Q200 is an automotive industry standard qualification indicating the component meets reliability and performance requirements for automotive applications. This certification is specific to the Panasonic ERJ-U6QFR91V and provides additional assurance for automotive or high-reliability applications, though it does not alter electrical equivalence.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts use identical 0805 package footprints, have the same number of terminations (2), and occupy the same physical space within standard assembly tolerances. No PCB redesign is required for substitution.

Q: What is the difference between "current sense" and "anti-sulfur" features?

A: Current sense refers to the primary application category for low-value resistors used in power management circuits. Anti-sulfur is a material protection feature that prevents sulfur-induced corrosion in harsh environments. Both are application-specific features that do not affect electrical substitutability.

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