RC1005F1051CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F1051CS is a 1.05 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 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 (Unlimited) moisture sensitivity rating. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements such as automotive qualification or enhanced power ratings.

Key Parameters

Parameter	Value
Resistance	1.05 kOhms
Tolerance	±1%
Power Rating	0.063W (1/16W)
Package / Case	0402 (1005 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitution eligibility for the RC1005F1051CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 1.05 kOhms
Tolerance: ±1%
Package / Case: 0402 (1005 Metric)
Composition: Thick Film
Temperature Coefficient: ±100ppm/°C
Operating Temperature Range: -55°C ~ 155°C
Number of Terminations: 2
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

Power Rating: Equal or greater than 0.063W (1/16W)
Features: May include additional certifications (Automotive AEC-Q200) or enhanced moisture resistance without compromising base specifications

All identified substitute parts maintain identical electrical characteristics and mechanical dimensions while meeting or exceeding the original part's performance envelope. Substitutes are categorized as Direct (identical specifications), Upgrade (enhanced power rating), or Similar (additional certifications) based on their relationship to the main part.

Parameter Comparison

Parameter	RC1005F1051CS (Samsung)	RC0402FR-071K05L (YAGEO)	ERJ-2RKF1051X (Panasonic)	AC0402FR-071K05L (YAGEO)	CRCW04021K05FKED (Vishay Dale)	RMCF0402FT1K05 (Stackpole)
Resistance	1.05 kOhms	1.05 kOhms	1.05 kOhms	1.05 kOhms	1.05 kOhms	1.05 kOhms
Tolerance	±1%	±1%	±1%	±1%	±1%	±1%
Power Rating	0.063W (1/16W)	0.063W (1/16W)	0.1W (1/10W)	0.063W (1/16W)	0.063W (1/16W)	0.063W (1/16W)
Package / Case	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
Size / Dimension	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)
Height - Seated (Max)	0.016" (0.40mm)	0.016" (0.40mm)	0.016" (0.40mm)	0.015" (0.37mm)	0.016" (0.40mm)	0.016" (0.40mm)
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Features	Moisture Resistant	Moisture Resistant	Automotive AEC-Q200	Automotive AEC-Q200, Moisture Resistant	Automotive AEC-Q200	Automotive AEC-Q200

Engineering Selection Recommendations

Direct Equivalent: RC0402FR-071K05L (YAGEO) provides direct functional equivalence to the RC1005F1051CS with identical electrical specifications, power rating, and package dimensions. This substitute maintains all compliance certifications including ROHS3 and REACH Unaffected status. Selection is appropriate for applications requiring standard industrial-grade thick film resistors without automotive qualification requirements.

Upgrade Option: ERJ-2RKF1051X (Panasonic Electronic Components) offers enhanced power dissipation at 0.1W (1/10W) compared to the 0.063W (1/16W) rating of the main part, while maintaining all other electrical and mechanical parameters. This component includes Automotive AEC-Q200 certification. Selection is appropriate for applications requiring higher thermal margin or automotive-grade reliability without design modification.

Similar Alternatives with Automotive Qualification: AC0402FR-071K05L (YAGEO), CRCW04021K05FKED (Vishay Dale), and RMCF0402FT1K05 (Stackpole Electronics Inc) all provide equivalent specifications with Automotive AEC-Q200 certification. These parts maintain the 0.063W (1/16W) power rating and identical package dimensions. AC0402FR-071K05L features a marginally reduced seated height of 0.015" (0.37mm) compared to 0.016" (0.40mm) standard. Selection among these alternatives is appropriate for automotive applications or where AEC-Q200 qualification is required.

All substitute parts maintain Active product status and are available in Tape & Reel (TR) packaging format consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can RC0402FR-071K05L be used as a direct replacement for RC1005F1051CS?

A: Yes. RC0402FR-071K05L is a direct equivalent with identical resistance (1.05 kOhms), tolerance (±1%), power rating (0.063W), package (0402), composition (Thick Film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and compliance status (ROHS3, REACH Unaffected). Mechanical dimensions and termination count are identical.

Q: What is the difference between the main part and ERJ-2RKF1051X?

A: ERJ-2RKF1051X provides an upgraded power rating of 0.1W (1/10W) versus the 0.063W (1/16W) of RC1005F1051CS. All other electrical parameters remain identical. ERJ-2RKF1051X includes Automotive AEC-Q200 certification. This upgrade allows for higher current handling or thermal margin in the same 0402 package footprint.

Q: Are the automotive-qualified alternatives (AC0402FR-071K05L, CRCW04021K05FKED, RMCF0402FT1K05) suitable for non-automotive applications?

A: Yes. Automotive AEC-Q200 certification represents an additional qualification level and does not restrict use in non-automotive applications. These parts meet or exceed all standard industrial specifications and are fully compatible with applications using the RC1005F1051CS.

Q: Does the height difference in AC0402FR-071K05L (0.015" vs 0.016") affect PCB assembly compatibility?

A: The 0.001" (0.03mm) height reduction in AC0402FR-071K05L is within standard PCB assembly tolerances and does not affect pick-and-place equipment compatibility or solder reflow processes. This marginal difference is not a limiting factor for substitution.

Q: What packaging format is available for all substitute parts?

A: All substitute parts are available in Tape & Reel (TR) packaging format, consistent with the RC1005F1051CS original part specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the environmental and regulatory requirements of the main part.

Q: Can I substitute parts based on resistance value alone?

A: No. Substitution requires matching all mandatory parameters: resistance (1.05 kOhms), tolerance (±1%), package (0402), composition (Thick Film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and compliance certifications. Power rating may be equal or greater than 0.063W.

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