RC2012F51R1CS 51.1 Ohm 1% 1/8W 0805 Chip Resistor Equivalent & Substitute Parts

Part Overview

The RC2012F51R1CS is a 51.1 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This component operates at 0.125W (1/8W) power rating with moisture-resistant construction and is classified as Active product status. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental compliance ratings to ensure direct functional interchangeability in circuit applications.

Substiute Parts

RC2012F51R1CS

Samsung Electro-MechanicsIn Stock: 1012RC2012F51R1CS Datasheet

Current PartRFQ

RC0805FR-0751R1L

YAGEOIn Stock: 6301RC0805FR-0751R1L Datasheet

DirectRFQ

CRCW080551R1FKEA

Vishay DaleIn Stock: 85594CRCW080551R1FKEA Datasheet

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CRCW080551R1FKTA

Vishay DaleIn Stock: 6571CRCW080551R1FKTA Datasheet

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ERJ-6ENF51R1V

Panasonic Electronic ComponentsIn Stock: 145008ERJ-6ENF51R1V Datasheet

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RMCF0805FT51R1

Stackpole Electronics IncIn Stock: 457328RMCF0805FT51R1 Datasheet

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RMCS0805FT51R1

Stackpole Electronics IncIn Stock: 1157RMCS0805FT51R1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC2012F51R1CS are qualified based on the following criteria:

Electrical Parameters (Mandatory Match):

• Resistance value: 51.1 Ohms
• Tolerance: ±1%
• Power rating: 0.125W (1/8W)
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical Parameters (Mandatory Match):

• Package type: 0805 (2012 Metric)
• Physical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm)
• Number of terminations: 2

Environmental & Compliance Parameters:

• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS compliance status
• REACH compliance status

All identified substitute parts meet the core electrical and mechanical requirements. Variations in height (seated maximum) and specific feature sets (Automotive AEC-Q200, Anti-Sulfur) are noted but do not prevent functional substitution within the specified parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Direct Equivalent): RC0805FR-0751R1L (YAGEO) is the primary direct equivalent. This part maintains identical electrical specifications, ROHS3 compliance, and moisture-resistant thick film construction. The 0.60mm seated height is within acceptable PCB assembly tolerances compared to the original 0.66mm specification.

Automotive-Qualified Alternatives: CRCW080551R1FKEA (Vishay Dale), ERJ-6ENF51R1V (Panasonic), and RMCF0805FT51R1 (Stackpole) are qualified for automotive applications under AEC-Q200 standard. These parts are suitable for designs requiring automotive-grade reliability and are ROHS3 compliant. Selection among these three depends on availability and supply chain requirements.

Specialized Application: RMCS0805FT51R1 (Stackpole) features anti-sulfur construction and is appropriate for applications in corrosive or high-sulfur environments. ROHS3 compliance and identical electrical parameters make this suitable for environmentally demanding applications.

Compliance Consideration: CRCW080551R1FKTA (Vishay Dale) is RoHS non-compliant and REACH-affected. This part is not recommended for new designs or applications requiring RoHS3 compliance certification.

Frequently Asked Questions (FAQ)

Q: Can RC0805FR-0751R1L replace RC2012F51R1CS directly on the PCB? A: Yes. Both parts share identical electrical specifications (51.1 Ω ±1%, 0.125W), operate across -55°C to 155°C, and use 0805 (2012 Metric) package format. The 0.06mm difference in seated height (0.60mm vs 0.66mm) is within standard PCB assembly tolerances and does not affect functionality or placement.

Q: What is the difference between moisture-resistant and automotive AEC-Q200 variants? A: Moisture-resistant variants (RC2012F51R1CS, RC0805FR-0751R1L, RMCS0805FT51R1) are designed for general industrial applications with protection against moisture ingress. Automotive AEC-Q200 variants (CRCW080551R1FKEA, ERJ-6ENF51R1V, RMCF0805FT51R1) meet automotive industry qualification standards and are suitable for automotive and high-reliability applications. Both meet the same electrical and mechanical specifications.

Q: Is CRCW080551R1FKTA suitable for new designs? A: CRCW080551R1FKTA is not recommended for new designs. This part is RoHS non-compliant and REACH-affected, which may violate regulatory requirements in many markets. Use CRCW080551R1FKEA (ROHS3 compliant variant) instead.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity? A: MSL 1 indicates the lowest moisture sensitivity level. These components do not require special moisture-control handling during storage, transportation, or assembly. Standard warehouse conditions are acceptable.

Q: Can I use RMCS0805FT51R1 in standard industrial applications? A: Yes. RMCS0805FT51R1 meets all electrical and mechanical requirements for standard industrial use. The anti-sulfur feature provides additional protection in corrosive environments but does not restrict use in standard applications. ROHS3 compliance makes it suitable for general industrial designs.

Q: Are all substitute parts available in Tape & Reel packaging? A: RC0805FR-0751R1L is available in Cut Tape (CT) & Digi-Reel® packaging. All other substitutes are available in Tape & Reel (TR) format. Verify packaging requirements with your procurement process before selection.

Q: What is the temperature coefficient significance? A: All listed parts share ±100ppm/°C temperature coefficient. This specification indicates resistance value change per degree Celsius within the operating temperature range. Identical coefficients ensure consistent circuit performance across temperature variations.