RC1005F2051CS Equivalent & Substitute Parts

Part Overview

The RC1005F2051CS is a 2.05 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0402 (1005 Metric) package format. This surface mount device is rated for 0.063W (1/16W) power dissipation and operates across the temperature range of -55°C to 155°C. The component features moisture resistance and is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The part is currently in active production status with 1057 units available in inventory.

Equivalent and substitute parts are necessary when the primary component becomes unavailable, when supply chain optimization is required, or when design specifications allow for alternative manufacturers meeting identical or enhanced electrical and mechanical parameters.

Substiute Parts

RC1005F2051CS

Samsung Electro-MechanicsIn Stock: 1137RC1005F2051CS Datasheet

Current PartRFQ

CR0402-FX-2051GLF

Bourns Inc.In Stock: 49553CR0402-FX-2051GLF Datasheet

DirectRFQ

RC0402FR-072K05L

YAGEOIn Stock: 213381RC0402FR-072K05L Datasheet

DirectRFQ

ERJ-2RKF2051X

Panasonic Electronic ComponentsIn Stock: 57719ERJ-2RKF2051X Datasheet

UpgradeRFQ

AC0402FR-072K05L

YAGEOIn Stock: 20608AC0402FR-072K05L Datasheet

SimilarRFQ

CRCW04022K05FKED

Vishay DaleIn Stock: 45872CRCW04022K05FKED Datasheet

SimilarRFQ

RMCF0402FT2K05

Stackpole Electronics IncIn Stock: 96818RMCF0402FT2K05 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC1005F2051CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 2.05 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

Allowable Variation:

• Power rating: Equal or greater than 0.063W (1/16W)
• Features: Additional certifications (such as AEC-Q200 automotive qualification) do not disqualify a part from substitution
• Physical dimensions: Minor variations within package specification tolerances are acceptable

Substitute parts are categorized as Direct, Upgrade, or Similar based on their relationship to the main part specifications.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (CR0402-FX-2051GLF, RC0402FR-072K05L): These parts provide electrical and mechanical equivalence to the RC1005F2051CS with identical power ratings and feature sets. Both manufacturers maintain active production status and RoHS3 compliance. The CR0402-FX-2051GLF from Bourns and RC0402FR-072K05L from YAGEO are suitable for direct replacement in applications where the original specification does not require automotive qualification.

Upgrade Substitute (ERJ-2RKF2051X): The Panasonic ERJ-2RKF2051X offers enhanced power rating (0.1W versus 0.063W) while maintaining all other electrical parameters. This part includes Automotive AEC-Q200 certification and is appropriate for applications requiring higher thermal margin or automotive-grade reliability. The increased power rating does not create incompatibility with the original design.

Similar Substitutes (AC0402FR-072K05L, CRCW04022K05FKED, RMCF0402FT2K05): These parts meet all mandatory electrical and mechanical specifications while incorporating Automotive AEC-Q200 certification. The AC0402FR-072K05L additionally includes moisture resistance matching the original part. These options are suitable for designs requiring automotive-grade components or when supply from primary manufacturers is constrained.

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and identical operating temperature ranges. Selection among substitutes should be based on availability, supply chain logistics, and application-specific requirements for automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can the CR0402-FX-2051GLF from Bourns be used as a direct replacement for the RC1005F2051CS?

A: Yes. The CR0402-FX-2051GLF meets all mandatory electrical parameters: 2.05 kOhms resistance, ±1% tolerance, 0.063W power rating, 0402 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, MSL 1, and RoHS3 compliance. No design modifications are required.

Q: What is the difference between the Direct and Similar substitute categories?

A: Direct substitutes (CR0402-FX-2051GLF, RC0402FR-072K05L) provide electrical and mechanical equivalence without additional certifications. Similar substitutes include Automotive AEC-Q200 certification, which adds qualification for automotive applications but does not alter core electrical performance. Both categories are electrically interchangeable.

Q: Why does the ERJ-2RKF2051X have a higher power rating (0.1W) than the original part (0.063W)?

A: The ERJ-2RKF2051X is classified as an Upgrade substitute because it provides enhanced thermal capability while maintaining all other specifications. The higher power rating allows greater current handling and thermal margin without affecting electrical compatibility. This part is suitable for applications where additional power dissipation capacity is beneficial.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed meet RoHS3 compliance requirements, matching the original RC1005F2051CS specification.

Q: Can I use the AC0402FR-072K05L in a non-automotive application?

A: Yes. The AC0402FR-072K05L meets all electrical and mechanical requirements for the RC1005F2051CS. Automotive AEC-Q200 certification is an additional qualification that does not restrict use in non-automotive applications. The part is fully compatible with the original design.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component can be stored indefinitely without moisture baking requirements prior to soldering. All listed parts, including the main part and substitutes, carry this rating.

Q: Are there any physical dimension differences between the main part and substitutes?

A: All parts use the 0402 (1005 Metric) package with identical length (0.039" / 1.00mm) and width (0.020" / 0.50mm). The AC0402FR-072K05L has a maximum seated height of 0.015" (0.37mm) compared to 0.016" (0.40mm) for other parts. This minor variation remains within package specification tolerances and does not affect PCB layout or assembly.

Q: Which substitute offers the best availability?

A: The RC0402FR-072K05L from YAGEO has the highest inventory level at 213,272 units. The RMCF0402FT2K05 from Stackpole Electronics follows with 96,792 units. Both parts are suitable for immediate procurement.