RC1005F21R0CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F21R0CS is a 21 Ohm ±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 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are identified to address inventory availability, supply chain continuity, or specific application requirements where alternative manufacturers' components meet or exceed the electrical and mechanical specifications of the original part.

Substiute Parts

RC1005F21R0CS

Samsung Electro-MechanicsIn Stock: 1049RC1005F21R0CS Datasheet

Current PartRFQ

RC0402FR-0721RL

YAGEOIn Stock: 52779RC0402FR-0721RL Datasheet

DirectRFQ

ERJ-2RKF21R0X

Panasonic Electronic ComponentsIn Stock: 90036ERJ-2RKF21R0X Datasheet

UpgradeRFQ

CRCW040221R0FKED

Vishay DaleIn Stock: 13832CRCW040221R0FKED Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1005F21R0CS are classified based on strict electrical and mechanical parameter alignment:

Direct Equivalent (RC0402FR-0721RL by YAGEO): Matches all critical specifications including 21 Ohm resistance, ±1% tolerance, 0.063W power rating, 0402 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, moisture resistance, RoHS3 compliance, and MSL 1 rating. Substitution is valid without design modification.

Upgrade Substitute (ERJ-2RKF21R0X by Panasonic Electronic Components): Maintains identical electrical parameters (21 Ohms, ±1% tolerance, ±100ppm/°C, -55°C to 155°C) and package format (0402). Differs in power rating (0.1W versus 0.063W) and includes Automotive AEC-Q200 qualification. Higher power rating provides design margin; automotive qualification adds reliability certification for applicable applications.

Similar Substitute (CRCW040221R0FKED by Vishay Dale): Matches all electrical specifications (21 Ohms, ±1% tolerance, ±100ppm/°C, -55°C to 155°C) and package format (0402). Includes Automotive AEC-Q200 qualification with identical 0.063W power rating. Substitution is valid with equivalent performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

RC0402FR-0721RL (YAGEO) is the direct equivalent substitute. All electrical and mechanical parameters are identical to the RC1005F21R0CS. This part is suitable for direct replacement in any application where the original Samsung component was specified. RoHS3 compliance and MSL 1 rating ensure regulatory and environmental compatibility.

ERJ-2RKF21R0X (Panasonic Electronic Components) serves as an upgrade substitute for applications requiring enhanced reliability or automotive qualification. The increased power rating (0.1W versus 0.063W) provides additional thermal margin without affecting circuit performance. AEC-Q200 qualification is applicable for automotive and high-reliability applications. Electrical parameters remain identical, ensuring functional compatibility.

CRCW040221R0FKED (Vishay Dale) is a suitable substitute with identical power rating and electrical specifications. AEC-Q200 qualification provides automotive-grade reliability certification. This part is appropriate for applications requiring automotive-qualified components while maintaining the original 0.063W power specification.

All three substitute parts maintain RoHS3 compliance, MSL 1 rating, and identical package dimensions (0402 / 1005 Metric), ensuring PCB layout compatibility and assembly process compatibility with the original RC1005F21R0CS.

Frequently Asked Questions (FAQ)

Q: Can RC0402FR-0721RL replace RC1005F21R0CS in all applications?

A: Yes. RC0402FR-0721RL matches all electrical specifications (21 Ohms, ±1% tolerance, 0.063W power rating, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range) and package format (0402). Direct substitution is valid without circuit modification.

Q: What is the difference between the Panasonic ERJ-2RKF21R0X and the original Samsung part?

A: The primary difference is power rating: ERJ-2RKF21R0X is rated for 0.1W (1/10W) compared to 0.063W (1/16W) for the RC1005F21R0CS. All other electrical parameters are identical. The Panasonic part includes AEC-Q200 automotive qualification. The higher power rating provides additional thermal design margin.

Q: Are the Vishay Dale CRCW040221R0FKED and Samsung RC1005F21R0CS electrically identical?

A: Yes. Both parts have 21 Ohm resistance, ±1% tolerance, 0.063W power rating, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. The Vishay part includes AEC-Q200 automotive qualification. Electrical performance is equivalent.

Q: Do all substitute parts fit the same PCB footprint?

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 of 0.016" (0.40mm). PCB layout and assembly compatibility is maintained.

Q: Which substitute part should be used for automotive applications?

A: Both ERJ-2RKF21R0X (Panasonic) and CRCW040221R0FKED (Vishay Dale) carry AEC-Q200 automotive qualification. Selection between these two depends on power margin requirements: ERJ-2RKF21R0X provides 0.1W rating, while CRCW040221R0FKED maintains the original 0.063W specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. RC0402FR-0721RL, ERJ-2RRF21R0X, and CRCW040221R0FKED are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the original RC1005F21R0CS.