RC1005F21R5CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F21R5CS is a 21.5 Ohms ±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 a temperature coefficient of ±100ppm/°C and operates across the -55°C to 155°C temperature range. The part is ROHS3 compliant, REACH unaffected, and carries MSL 1 (Unlimited) moisture sensitivity rating. As an active product with established supply availability, equivalent and substitute parts from alternative manufacturers are available for applications requiring component sourcing flexibility, supply chain redundancy, or specific certifications such as automotive AEC-Q200 qualification.

Substiute Parts

RC1005F21R5CS

Samsung Electro-MechanicsIn Stock: 1041RC1005F21R5CS Datasheet

Current PartRFQ

RC0402FR-0721R5L

YAGEOIn Stock: 115535RC0402FR-0721R5L Datasheet

DirectRFQ

ERJ-2RKF21R5X

Panasonic Electronic ComponentsIn Stock: 85596ERJ-2RKF21R5X Datasheet

UpgradeRFQ

CRCW040221R5FKED

Vishay DaleIn Stock: 32260CRCW040221R5FKED Datasheet

SimilarRFQ

RMCF0402FT21R5

Stackpole Electronics IncIn Stock: 23305RMCF0402FT21R5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC1005F21R5CS is determined by strict equivalence across the following critical parameters: resistance value (21.5 Ohms), tolerance (±1%), package format (0402 / 1005 Metric), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and compliance certifications (ROHS3, REACH Unaffected, MSL 1).

The substitute parts are grouped into two categories:

Direct Equivalent: RC0402FR-0721R5L (YAGEO) matches all electrical and mechanical specifications identically, including 0.063W power rating and moisture-resistant thick film construction.

Upgrade Equivalent: ERJ-2RKF21R5X (Panasonic Electronic Components) maintains all core electrical parameters but features enhanced 0.1W (1/10W) power rating and automotive AEC-Q200 qualification, providing higher power headroom within the same package footprint.

Similar Equivalents: CRCW040221R5FKED (Vishay Dale) and RMCF0402FT21R5 (Stackpole Electronics Inc) provide full electrical and mechanical compatibility with automotive AEC-Q200 certification, matching the 0.063W power rating of the original part.

All substitute parts maintain identical package dimensions, termination count, and environmental compliance ratings.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the RC1005F21R5CS. Selection criteria are based on product status, compliance certifications, and application requirements:

RC0402FR-0721R5L (YAGEO): Direct equivalent providing identical specifications. Suitable for general-purpose applications requiring standard industrial compliance (ROHS3, REACH Unaffected, MSL 1).

ERJ-2RKF21R5X (Panasonic Electronic Components): Upgrade option with enhanced 0.1W power rating while maintaining identical package footprint and all other electrical parameters. Includes automotive AEC-Q200 qualification. Applicable to applications requiring higher power dissipation margin or automotive-grade component qualification.

CRCW040221R5FKED (Vishay Dale): Full compatibility with automotive AEC-Q200 certification. Maintains original 0.063W power rating. Suitable for automotive and industrial applications requiring AEC-Q200 qualification.

RMCF0402FT21R5 (Stackpole Electronics Inc): Full compatibility with automotive AEC-Q200 certification. Maintains original 0.063W power rating. Suitable for automotive and industrial applications requiring AEC-Q200 qualification.

All parts are active products with established supply availability and identical environmental compliance ratings.

Frequently Asked Questions (FAQ)

Q: Can RC0402FR-0721R5L be used as a direct replacement for RC1005F21R5CS?

A: Yes. RC0402FR-0721R5L is a direct equivalent, matching all electrical specifications (21.5 Ohms ±1%, 0.063W, ±100ppm/°C), mechanical dimensions (0402 / 1005 Metric package), and compliance certifications (ROHS3, REACH Unaffected, MSL 1).

Q: What is the difference between ERJ-2RKF21R5X and the original RC1005F21R5CS?

A: ERJ-2RKF21R5X maintains identical electrical parameters and package dimensions but features a higher power rating (0.1W versus 0.063W) and includes automotive AEC-Q200 qualification. All other specifications remain equivalent.

Q: Are CRCW040221R5FKED and RMCF0402FT21R5 suitable for non-automotive applications?

A: Yes. Both parts meet all general industrial compliance requirements (ROHS3, REACH Unaffected, MSL 1) and maintain full electrical and mechanical compatibility. Automotive AEC-Q200 certification is an additional qualification that does not restrict use in non-automotive applications.

Q: Do all substitute parts use the same 0402 package format?

A: Yes. All substitute parts use the 0402 (1005 Metric) package with identical dimensions (0.039" L x 0.020" W / 1.00mm x 0.50mm) and maximum seated height (0.016" / 0.40mm), ensuring direct PCB footprint compatibility.

Q: What is the temperature coefficient specification for all listed parts?

A: All parts, including the original RC1005F21R5CS and all substitutes, maintain a temperature coefficient of ±100ppm/°C across the operating temperature range of -55°C to 155°C.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: Yes. All substitute parts are supplied in Tape & Reel (TR) packaging format, matching the original part's packaging specification.

Q: Which substitute part should be selected for maximum power dissipation capability?

A: ERJ-2RKF21R5X provides the highest power rating at 0.1W (1/10W), compared to 0.063W (1/16W) for all other parts. This part is suitable for applications requiring higher power margin within the same package footprint.