RC2012F4R3CS Equivalent & Substitute Parts Reference

Part Overview

The RC2012F4R3CS is a 4.3 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.125W (1/8W) in 0805 (2012 Metric) package format. This component is designed for general-purpose applications requiring moisture-resistant thick film construction. The part maintains Active product status with 1128 units currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements such as automotive qualification or enhanced temperature coefficient performance.

Substiute Parts

RC2012F4R3CS

Samsung Electro-MechanicsIn Stock: 1181RC2012F4R3CS Datasheet

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RMCF0805FT4R30

Stackpole Electronics IncIn Stock: 8533RMCF0805FT4R30 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC2012F4R3CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 4.3 Ohms (exact match required)
• Tolerance: ±1% (precision class equivalence)
• Power Rating: 0.125W / 1/8W (thermal rating equivalence)
• Package / Case: 0805 (2012 Metric) (physical and electrical footprint compatibility)
• Composition: Thick Film (manufacturing process equivalence)
• Operating Temperature Range: -55°C ~ 155°C (environmental envelope compatibility)
• Moisture Sensitivity Level: 1 (Unlimited) (handling compatibility)
• RoHS Status: ROHS3 Compliant (regulatory equivalence)

Allowable Variation Parameters:

• Temperature Coefficient: May vary within industry-standard ranges (±200ppm/°C to ±300ppm/°C) without affecting functional substitution
• Features: Additional certifications (such as AEC-Q200 automotive qualification) do not disqualify substitution; they represent enhanced capability

The RMCF0805FT4R30 manufactured by Stackpole Electronics Inc meets all mandatory matching parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

RC2012F4R3CS (Samsung Electro-Mechanics): Select this part for applications requiring standard moisture-resistant thick film construction with general-purpose industrial specifications. Suitable for non-automotive applications where AEC-Q200 qualification is not required. Current inventory of 1128 units supports immediate procurement.

RMCF0805FT4R30 (Stackpole Electronics Inc): Select this part for automotive applications or systems requiring AEC-Q200 qualification. The superior temperature coefficient (±200ppm/°C versus ±300ppm/°C) provides enhanced stability across the operating temperature range. Larger inventory availability (8457 units) supports high-volume procurement. Both parts maintain identical RoHS3 compliance and MSL ratings.

Both parts are Active status components with equivalent regulatory compliance (ROHS3 Compliant, REACH Unaffected, EAR99 classification). Selection between these parts depends on application-specific requirements for automotive qualification and temperature stability performance rather than functional electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can RMCF0805FT4R30 be used as a direct replacement for RC2012F4R3CS in existing designs?

A: Yes. Both parts share identical electrical specifications (4.3 Ohms ±1%, 0.125W), physical package (0805 / 2012 Metric), and environmental ratings (-55°C ~ 155°C). PCB footprints and solder reflow profiles are compatible. The RMCF0805FT4R30 includes AEC-Q200 automotive qualification, which does not restrict use in non-automotive applications.

Q: What is the significance of the temperature coefficient difference (±300ppm/°C vs ±200ppm/°C)?

A: Temperature coefficient defines resistance value drift across the operating temperature range. The RMCF0805FT4R30 exhibits lower drift (±200ppm/°C), resulting in more stable resistance values at temperature extremes. For applications with tight tolerance requirements across temperature ranges, the Stackpole part provides superior performance. For general-purpose applications, both coefficients are within acceptable industrial ranges.

Q: Are there any moisture handling differences between these parts?

A: No. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Both are classified as moisture-resistant thick film components. Handling, storage, and reflow procedures are equivalent.

Q: Why does the Stackpole part have higher inventory availability?

A: Inventory levels reflect current stock positions and do not indicate technical superiority or preference. Both parts are Active status with equivalent specifications. Procurement selection should prioritize application requirements and supply chain lead times rather than inventory quantity alone.

Q: Are both parts suitable for high-reliability applications?

A: Both parts meet ROHS3 compliance and carry Active product status. The RMCF0805FT4R30 includes AEC-Q200 automotive qualification, which certifies suitability for automotive high-reliability environments. For non-automotive high-reliability applications, both parts are acceptable; application-specific qualification testing may be required.