Equivalent & Substitute Parts for RC1005F1021CS

Part Overview

The RC1005F1021CS is a 1.02 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0402 (1005 Metric) package format. This component is rated at 0.063W (1/16W) power dissipation with moisture resistant characteristics and operates across the temperature range of -55°C to 155°C. The part maintains Active product status and carries ROHS3 compliance with MSL Level 1 (Unlimited moisture sensitivity rating).

Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and environmental ratings can be maintained across different manufacturers. This document provides engineering-grade substitution guidance based on strict parameter matching.

Key Parameters

Parameter	Value	Specification Type
Resistance	1.02 kOhms	Electrical
Tolerance	±1%	Electrical
Power Rating	0.063W (1/16W)	Electrical
Package / Case	0402 (1005 Metric)	Mechanical
Composition	Thick Film	Material
Temperature Coefficient	±100ppm/°C	Electrical
Operating Temperature Range	-55°C ~ 155°C	Environmental
Moisture Sensitivity Level	1 (Unlimited)	Environmental
RoHS Status	ROHS3 Compliant	Compliance
Number of Terminations	2	Mechanical

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 1.02 kOhms
Tolerance: ±1%
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

Allowable Variation:

Power Rating: Substitute parts may equal or exceed the 0.063W specification. Parts rated at 0.1W (1/10W) are acceptable as they provide equal or greater power dissipation capability.
Features: Substitute parts may include additional certifications (such as AEC-Q200 automotive qualification) beyond the base moisture resistant specification.
Height - Seated (Max): Minor dimensional variations within 0.016" (0.40mm) maximum are acceptable.

Substitution Categories:

Direct Equivalent: RC0402FR-071K02L (YAGEO) - Identical electrical and mechanical specifications with identical power rating.

Upgrade Equivalent: ERJ-2RKF1021X (Panasonic) - Exceeds power rating specification (0.1W vs. 0.063W) and includes automotive AEC-Q200 qualification.

Similar Equivalents: AC0402FR-071K02L (YAGEO), CRCW04021K02FKED (Vishay Dale), RMCF0402FT1K02 (Stackpole Electronics Inc) - Match all electrical and mechanical specifications with automotive AEC-Q200 qualification added.

Parameter Comparison

Parameter	RC1005F1021CS (Samsung)	RC0402FR-071K02L (YAGEO)	ERJ-2RKF1021X (Panasonic)	AC0402FR-071K02L (YAGEO)	CRCW04021K02FKED (Vishay Dale)	RMCF0402FT1K02 (Stackpole)
Resistance	1.02 kOhms	1.02 kOhms	1.02 kOhms	1.02 kOhms	1.02 kOhms	1.02 kOhms
Tolerance	±1%	±1%	±1%	±1%	±1%	±1%
Power (Watts)	0.063W	0.063W	0.1W	0.063W	0.063W	0.063W
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
Package / Case	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)
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
Features	Moisture Resistant	Moisture Resistant	Automotive AEC-Q200	Automotive AEC-Q200, Moisture Resistant	Automotive AEC-Q200	Automotive AEC-Q200
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

RC0402FR-071K02L (YAGEO) - Direct Equivalent

This part is the primary direct substitute for RC1005F1021CS. All electrical specifications, mechanical dimensions, and environmental ratings are identical. Both components share identical power rating (0.063W), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C). ROHS3 compliance and MSL Level 1 rating are matched. Selection of this part introduces no design risk and maintains full specification equivalence.

ERJ-2RKF1021X (Panasonic Electronic Components) - Upgrade Equivalent

This part exceeds the power rating specification at 0.1W (1/10W) compared to the 0.063W base specification. All other electrical parameters remain identical. The addition of automotive AEC-Q200 qualification provides enhanced reliability certification suitable for automotive applications. This part is appropriate when higher power dissipation margin or automotive-grade reliability is required. The upgrade in power rating does not introduce incompatibility.

AC0402FR-071K02L (YAGEO) - Similar Equivalent with Automotive Qualification

This part matches all base electrical and mechanical specifications while adding automotive AEC-Q200 qualification. Height dimension is 0.015" (0.37mm) versus the 0.016" (0.40mm) maximum specification, remaining within acceptable tolerance. This part is suitable for applications requiring automotive-grade components without power rating upgrade.

CRCW04021K02FKED (Vishay Dale) - Similar Equivalent with Automotive Qualification

This part maintains identical electrical specifications and mechanical dimensions to the base part while including automotive AEC-Q200 qualification. All environmental ratings and compliance certifications match. This part is appropriate for automotive applications requiring Vishay Dale component sourcing.

RMCF0402FT1K02 (Stackpole Electronics Inc) - Similar Equivalent with Automotive Qualification

This part provides identical electrical and mechanical specifications with automotive AEC-Q200 qualification added. All environmental ratings and compliance certifications are matched. This part is suitable for applications requiring Stackpole Electronics Inc component sourcing with automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can ERJ-2RKF1021X be used as a direct replacement for RC1005F1021CS?

A: Yes. The ERJ-2RKF1021X meets all mandatory electrical specifications (1.02 kOhms ±1%, ±100ppm/°C temperature coefficient) and mechanical requirements (0402 package, identical dimensions). The power rating of 0.1W exceeds the 0.063W specification, providing additional thermal margin. All environmental ratings and compliance certifications are matched.

Q: What is the difference between the base RC1005F1021CS and the automotive-qualified substitutes?

A: The base RC1005F1021CS carries moisture resistant thick film composition. The automotive-qualified substitutes (AC0402FR-071K02L, CRCW04021K02FKED, RMCF0402FT1K02, ERJ-2RKF1021X) include AEC-Q200 automotive qualification in addition to the base specifications. AEC-Q200 qualification indicates compliance with automotive industry reliability and testing standards. Selection of automotive-qualified parts is appropriate when automotive-grade reliability is required.

Q: Are there any dimensional incompatibilities between RC1005F1021CS and the substitute parts?

A: All substitute parts use the identical 0402 (1005 Metric) package with dimensions of 0.039" L x 0.020" W (1.00mm x 0.50mm). Height dimensions are 0.016" (0.40mm) maximum for most parts, with AC0402FR-071K02L at 0.015" (0.37mm) maximum. These variations are within acceptable tolerance for PCB assembly and do not introduce mechanical incompatibility.

Q: Can I use RMCF0402FT1K02 in place of RC1005F1021CS without circuit redesign?

A: Yes. The RMCF0402FT1K02 maintains identical resistance (1.02 kOhms), tolerance (±1%), power rating (0.063W), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C). The 0402 package and mechanical dimensions are identical. No circuit redesign is required.

Q: What is the significance of MSL Level 1 (Unlimited) rating?

A: MSL Level 1 indicates unlimited shelf life without moisture bake-out requirements. All listed substitute parts carry MSL Level 1 rating, matching the base component. This specification is maintained across all substitutes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the base RC1005F1021CS specification. Compliance status is maintained across all substitution options.

Q: Which substitute part should I select for general-purpose applications?

A: RC0402FR-071K02L (YAGEO) is the direct equivalent with identical specifications and is appropriate for general-purpose applications. If automotive qualification is required, select from AC0402FR-071K02L, CRCW04021K02FKED, RMCF0402FT1K02, or ERJ-2RKF1021X based on preferred manufacturer sourcing.

Q: Is there a performance difference between the 0.063W and 0.1W power-rated parts?

A: Both power ratings are suitable for the same circuit applications. The 0.1W rating (ERJ-2RKF1021X) provides additional thermal margin and is appropriate when higher power dissipation capability is desired. The 0.063W rating is sufficient for standard applications matching the base specification.

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