MCR10ERTFL2R21 Equivalent & Substitute Parts

Part Overview

The MCR10ERTFL2R21 is a 2.21 Ohm ±1% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Rohm Semiconductor. This component is designed for automotive applications with AEC-Q200 qualification and operates across the temperature range of -55°C to 155°C. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

MCR10ERTFL2R21

Rohm SemiconductorIn Stock: 984MCR10ERTFL2R21 Datasheet

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RC0805FR-072R21L

YAGEOIn Stock: 106643RC0805FR-072R21L Datasheet

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RMCF0805FT2R21

Stackpole Electronics IncIn Stock: 13498RMCF0805FT2R21 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MCR10ERTFL2R21 is determined by strict equivalence across the following critical parameters:

• Resistance value: 2.21 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.125W, 1/8W (exact match required)
• Package: 0805 (2012 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Operating temperature range: -55°C to 155°C (minimum requirement)
• RoHS3 compliance (required for regulatory alignment)
• Moisture Sensitivity Level 1 (required for handling compatibility)

Two substitute parts meet all electrical and mechanical equivalence criteria: RC0805FR-072R21L from YAGEO and RMCF0805FT2R21 from Stackpole Electronics Inc. Both maintain identical resistance, tolerance, power rating, and package specifications while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

RC0805FR-072R21L (YAGEO) is suitable for applications where moisture resistance is a design priority. This part maintains all electrical equivalence parameters and offers the lowest seated height at 0.024" (0.60mm), which may be advantageous in space-constrained layouts. YAGEO inventory availability is significantly higher at 106,575 pieces.

RMCF0805FT2R21 (Stackpole Electronics Inc) is the preferred substitute for automotive applications requiring AEC-Q200 qualification, matching the original part's automotive certification. This part maintains identical seated height to the original at 0.026" (0.65mm) and offers active product status with 13,486 pieces in stock.

Both substitutes are ROHS3 compliant and maintain MSL Level 1 rating, ensuring compatibility with existing supply chain and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can RC0805FR-072R21L be used in automotive applications? A: RC0805FR-072R21L is not rated for AEC-Q200 automotive qualification. For automotive applications, RMCF0805FT2R21 is the appropriate substitute.

Q: What is the significance of the temperature coefficient difference? A: The original MCR10ERTFL2R21 has a temperature coefficient of ±250ppm/°C, while both substitutes specify ±200ppm/°C. Both remain within acceptable tolerance drift across the -55°C to 155°C operating range for standard applications.

Q: Are there any PCB layout considerations when switching to these substitutes? A: RC0805FR-072R21L has a maximum seated height of 0.024" (0.60mm), which is 0.002" lower than the original and RMCF0805FT2R21. Verify clearance in designs with tight vertical constraints. All three parts use identical 0805 footprints.

Q: Do both substitutes meet RoHS and MSL requirements? A: Yes. Both RC0805FR-072R21L and RMCF0805FT2R21 are ROHS3 compliant with MSL Level 1 (Unlimited) rating, matching the original part's compliance profile.

Q: Which substitute offers better availability? A: RC0805FR-072R21L from YAGEO offers significantly higher inventory at 106,575 pieces compared to RMCF0805FT2R21 at 13,486 pieces.