RC2012F4R99CS Equivalent & Substitute Parts Reference

Part Overview

The RC2012F4R99CS is a 4.99 Ohm ±1% 1/8W thick film chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with moisture-resistant construction and ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and environmental ratings align with the original component, enabling direct replacement in circuit applications without design modification.

Substiute Parts

RC2012F4R99CS

Samsung Electro-MechanicsIn Stock: 1063RC2012F4R99CS Datasheet

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RC0805FR-074R99L

YAGEOIn Stock: 47930RC0805FR-074R99L Datasheet

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RMCF0805FT4R99

Stackpole Electronics IncIn Stock: 21537RMCF0805FT4R99 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC2012F4R99CS is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Resistance value: 4.99 Ohms
• Tolerance: ±1%
• Power rating: 0.125W (1/8W)
• Package: 0805 (2012 Metric)
• Composition: Thick Film
• Operating temperature range: -55°C ~ 155°C
• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS compliance: ROHS3 Compliant

Allowable Variation Parameters:

• Temperature Coefficient: ±200ppm/°C to ±300ppm/°C (within specification tolerance)
• Height - Seated (Max): 0.024" to 0.026" (within 0805 package envelope)
• Manufacturer: Different manufacturers permitted
• Series designation: Different series permitted
• Additional certifications (e.g., AEC-Q200): Permitted as enhancement

The identified substitute parts RC0805FR-074R99L (YAGEO) and RMCF0805FT4R99 (Stackpole Electronics Inc) meet all critical matching parameters and are therefore electrically and mechanically interchangeable with the original component.

Parameter Comparison

Engineering Selection Recommendations

RC0805FR-074R99L (YAGEO): This substitute maintains full electrical and mechanical compatibility with the original RC2012F4R99CS. The temperature coefficient of ±200ppm/°C is superior to the original specification, providing improved thermal stability. ROHS3 compliance and MSL 1 rating confirm environmental qualification equivalence. This part is suitable for direct substitution in standard industrial and commercial applications.

RMCF0805FT4R99 (Stackpole Electronics Inc): This substitute provides equivalent electrical and mechanical specifications with the addition of Automotive AEC-Q200 certification. The temperature coefficient of ±200ppm/°C matches the YAGEO alternative. ROHS3 compliance and MSL 1 rating are maintained. This part is suitable for direct substitution in both standard and automotive-grade applications where AEC-Q200 qualification is required or beneficial.

Both substitute parts are Active status components with established supply availability, confirming long-term sourcing viability.

Frequently Asked Questions (FAQ)

Q: Can RC0805FR-074R99L replace RC2012F4R99CS in all applications?

A: Yes. Both components share identical resistance (4.99 Ohms), tolerance (±1%), power rating (0.125W), package (0805), composition (thick film), operating temperature range (-55°C ~ 155°C), and compliance certifications (ROHS3, MSL 1). The YAGEO part features a lower temperature coefficient (±200ppm/°C vs. ±300ppm/°C), which represents improved performance. Direct substitution is electrically and mechanically valid.

Q: What is the difference between the two substitute parts?

A: RC0805FR-074R99L (YAGEO) and RMCF0805FT4R99 (Stackpole) are electrically identical to the original and to each other in all critical parameters. The primary distinction is that RMCF0805FT4R99 carries Automotive AEC-Q200 certification, qualifying it for automotive applications. Both have identical temperature coefficients (±200ppm/°C) and physical dimensions within 0805 package tolerance.

Q: Are there any height differences that affect PCB assembly?

A: Height differences are minimal and within 0805 package specification. RC2012F4R99CS and RMCF0805FT4R99 both have maximum seated height of 0.026" (0.65mm). RC0805FR-074R99L has maximum seated height of 0.024" (0.60mm). These variations are within standard 0805 package tolerance and do not affect PCB assembly, solder reflow, or component placement.

Q: Can RMCF0805FT4R99 be used in non-automotive applications?

A: Yes. RMCF0805FT4R99 meets all specifications required for the original RC2012F4R99CS and exceeds them through AEC-Q200 certification. Automotive-qualified components are suitable for use in standard industrial and commercial applications. The additional qualification represents enhanced reliability and does not restrict application scope.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity limitations. These parts do not require special moisture-controlled storage, handling, or baking procedures prior to soldering. This classification applies to all three components: the original RC2012F4R99CS and both substitutes RC0805FR-074R99L and RMCF0805FT4R99.

Q: Are all three parts ROHS3 compliant?

A: Yes. RC2012F4R99CS, RC0805FR-074R99L, and RMCF0805FT4R99 are all ROHS3 compliant. This certification confirms compliance with Restriction of Hazardous Substances regulations and is maintained across all substitute selections.