RCS2012F45R3CS Equivalent & Substitute Parts

Part Overview

The RCS2012F45R3CS is a 45.3 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0805 (2012 Metric) package format. This component is rated for 0.125W (1/8W) power dissipation and operates across the temperature range of -55°C to 155°C. The part features anti-sulfur and moisture-resistant construction with a temperature coefficient of ±100ppm/°C. Currently in active production status with 1110 pieces available in inventory, this resistor is ROHS3 compliant and suitable for general industrial and consumer applications. Equivalent substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental compliance ratings.

Substiute Parts

RCS2012F45R3CS

Samsung Electro-MechanicsIn Stock: 1187RCS2012F45R3CS Datasheet

Current PartRFQ

CRCW080545R3FKEA

Vishay DaleIn Stock: 23953CRCW080545R3FKEA Datasheet

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ERJ-6ENF45R3V

Panasonic Electronic ComponentsIn Stock: 33230ERJ-6ENF45R3V Datasheet

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RC0805FR-0745R3L

YAGEOIn Stock: 9462RC0805FR-0745R3L Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RCS2012F45R3CS are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters: Resistance value (45.3 Ohms), tolerance (±1%), and power rating (0.125W) must be identical across all substitute candidates. Temperature coefficient (±100ppm/°C) and operating temperature range (-55°C to 155°C) establish the thermal performance envelope.

Mechanical Parameters: Package designation (0805 / 2012 Metric) and number of terminations (2) are mandatory for PCB footprint compatibility. Physical dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm) ensure proper placement and soldering.

Compliance Parameters: RoHS3 compliance, MSL rating of 1, and REACH unaffected status are required for regulatory and environmental compatibility.

All identified substitute parts meet these criteria without exception. Variations in height-seated measurements and specific feature sets (anti-sulfur versus automotive AEC-Q200 certification) do not affect substitution eligibility within the defined parameter scope.

Parameter Comparison

Engineering Selection Recommendations

All four resistor models listed in this reference are functionally equivalent for direct substitution in applications requiring a 45.3 Ohm ±1% 0.125W 0805 thick film chip resistor. Selection among these parts should be based on the following factors:

Product Availability: CRCW080545R3FKEA (Vishay Dale) offers the highest inventory level at 23,916 pieces, followed by ERJ-6ENF45R3V (Panasonic) at 33,215 pieces. RC0805FR-0745R3L (YAGEO) provides 9,356 pieces, while the primary part RCS2012F45R3CS (Samsung) has 1,110 pieces in stock.

Application-Specific Certifications: CRCW080545R3FKEA and ERJ-6ENF45R3V both carry AEC-Q200 automotive qualification, making them suitable for automotive and high-reliability applications. RCS2012F45R3CS and RC0805FR-0745R3L are specified for general industrial use without automotive certification.

Environmental Features: RCS2012F45R3CS includes anti-sulfur construction in addition to moisture resistance. RC0805FR-0745R3L specifies moisture resistance. CRCW080545R3FKEA and ERJ-6ENF45R3V do not list these specific environmental features in their specifications.

Physical Dimensions: All parts meet the 0805 package standard. Height variations (0.50mm to 0.70mm) are within typical PCB assembly tolerances and do not affect substitution eligibility.

Regulatory Compliance: All four parts are ROHS3 compliant, REACH unaffected, and carry MSL rating 1, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can CRCW080545R3FKEA replace RCS2012F45R3CS in any application?

A: Yes. Both parts share identical electrical specifications (45.3 Ohms ±1%, 0.125W), thermal characteristics (±100ppm/°C, -55°C to 155°C), and mechanical dimensions (0805 package, 2.00mm x 1.25mm). The primary difference is that CRCW080545R3FKEA carries AEC-Q200 automotive certification, which does not restrict its use in non-automotive applications.

Q: What is the significance of the height difference between substitute parts?

A: Height variations range from 0.50mm (CRCW080545R3FKEA) to 0.70mm (ERJ-6ENF45R3V). These differences fall within standard PCB assembly tolerances and do not affect component placement, soldering, or electrical performance. PCB design clearances for 0805 components accommodate this range.

Q: Are the anti-sulfur features of RCS2012F45R3CS critical for substitution?

A: Anti-sulfur and moisture-resistant features are environmental enhancements that extend component life in corrosive or humid conditions. If the application requires these specific protections, RCS2012F45R3CS or RC0805FR-0745R3L should be selected. For general industrial environments, all four parts are equivalent.

Q: Can these resistors be used interchangeably in automotive applications?

A: CRCW080545R3FKEA and ERJ-6ENF45R3V are AEC-Q200 qualified and are the preferred choices for automotive applications. RCS2012F45R3CS and RC0805FR-0745R3L are not specified with automotive certification and should be evaluated against specific automotive design requirements before use.

Q: What does MSL rating 1 mean for these components?

A: MSL (Moisture Sensitivity Level) rating 1 indicates unlimited shelf life without moisture baking requirements. These components can be stored and handled under standard conditions without special moisture control procedures, simplifying inventory management and supply chain logistics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four resistor models—RCS2012F45R3CS, CRCW080545R3FKEA, ERJ-6ENF45R3V, and RC0805FR-0745R3L—are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic components in the European Union and other regulated markets.