RC1005F2943CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F2943CS is a 294 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0402 (1005 Metric) package format. This component is rated for 0.063W (1/16W) power dissipation with moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part maintains Active product status and is ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component's functional requirements in circuit applications.

Substiute Parts

RC1005F2943CS

Samsung Electro-MechanicsIn Stock: 1157RC1005F2943CS Datasheet

Current PartRFQ

ERJ-2RKF2943X

Panasonic Electronic ComponentsIn Stock: 183758ERJ-2RKF2943X Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC1005F2943CS is determined by strict alignment of the following critical parameters:

Electrical Specifications: Resistance value (294 kOhms) and tolerance (±1%) must match exactly. Temperature coefficient (±100ppm/°C) and operating temperature range (-55°C to 155°C) establish thermal performance boundaries.

Mechanical Compatibility: Package designation (0402 / 1005 Metric) and physical dimensions (0.039" L × 0.020" W, 1.00mm × 0.50mm) ensure PCB footprint compatibility. Height-seated maximum (0.016" / 0.40mm) confirms clearance requirements.

Composition & Construction: Thick film construction type is maintained across substitutes to preserve electrical characteristics and reliability performance.

Compliance & Certifications: ROHS3 compliance and MSL 1 rating are required. Additional certifications such as AEC-Q200 automotive qualification do not disqualify a substitute but indicate enhanced qualification scope.

Power Rating Consideration: The substitute part may exceed the original power rating (0.1W vs. 0.063W) without creating incompatibility, as higher power capability provides design margin. Lower power ratings would disqualify a substitute.

Parameter Comparison

Engineering Selection Recommendations

The ERJ-2RKF2943X (Panasonic Electronic Components) qualifies as a direct substitute for the RC1005F2943CS based on electrical and mechanical parameter equivalence. Both components share identical resistance value, tolerance, package dimensions, and thermal operating range. The substitute part's higher power rating (0.1W vs. 0.063W) provides additional thermal margin without introducing incompatibility.

Both parts maintain Active product status and ROHS3 compliance. The ERJ-2RKF2943X carries AEC-Q200 automotive qualification, which indicates enhanced reliability screening and qualification testing. This additional certification does not restrict use in non-automotive applications and may provide design assurance benefits in applications requiring higher reliability standards.

Selection between these parts should be based on availability, supply chain considerations, and any specific design requirements related to automotive qualification or supplier preference. Both components are suitable for direct PCB footprint replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can the ERJ-2RKF2943X replace the RC1005F2943CS in existing designs without PCB modification?

A: Yes. Both components share identical 0402 (1005 Metric) package dimensions, footprint, and pinout. Direct substitution on the PCB is possible without layout changes.

Q: What is the significance of the higher power rating on the Panasonic substitute (0.1W vs. 0.063W)?

A: The higher power rating indicates greater thermal dissipation capability. In circuit applications where the RC1005F2943CS operates within its 0.063W specification, the ERJ-2RKF2943X will operate with additional thermal margin, which is compatible and does not create design conflicts.

Q: Does AEC-Q200 certification on the Panasonic part restrict its use to automotive applications only?

A: No. AEC-Q200 is an automotive qualification standard that indicates enhanced reliability testing. Parts with this certification are suitable for any application, including non-automotive use. The certification provides additional assurance of component quality and reliability.

Q: Are the temperature coefficients and operating temperature ranges identical?

A: Yes. Both components specify ±100ppm/°C temperature coefficient and -55°C to 155°C operating temperature range, ensuring equivalent thermal performance characteristics.

Q: What is MSL 1 rating and how does it affect component handling?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited moisture sensitivity protection. Components with this rating do not require special moisture control during storage, handling, or assembly, simplifying logistics and manufacturing processes.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the RC1005F2943CS and ERJ-2RKF2943X are ROHS3 compliant, meeting environmental and regulatory requirements for lead-free and restricted substance compliance.