RC1005F4021CS Equivalent & Substitute Parts

Part Overview

The RC1005F4021CS is a 4.02 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 unlimited moisture sensitivity level (MSL 1). The part maintains active product status with 1029 units currently in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design specifications allow for compatible alternatives from different manufacturers that meet identical or enhanced electrical and mechanical parameters.

Substiute Parts

RC1005F4021CS

Samsung Electro-MechanicsIn Stock: 1046RC1005F4021CS Datasheet

Current PartRFQ

CR0402-FX-4021GLF

Bourns Inc.In Stock: 73414CR0402-FX-4021GLF Datasheet

DirectRFQ

RC0402FR-074K02L

YAGEOIn Stock: 41299RC0402FR-074K02L Datasheet

DirectRFQ

ERJ-2RKF4021X

Panasonic Electronic ComponentsIn Stock: 321560ERJ-2RKF4021X Datasheet

UpgradeRFQ

AC0402FR-074K02L

YAGEOIn Stock: 29881AC0402FR-074K02L Datasheet

SimilarRFQ

AF0402FR-074K02L

YAGEOIn Stock: 5523AF0402FR-074K02L Datasheet

SimilarRFQ

CRCW04024K02FKED

Vishay DaleIn Stock: 80813CRCW04024K02FKED Datasheet

SimilarRFQ

CRCW04024K02FKTD

Vishay DaleIn Stock: 30172CRCW04024K02FKTD Datasheet

SimilarRFQ

RMCF0402FT4K02

Stackpole Electronics IncIn Stock: 104446RMCF0402FT4K02 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the RC1005F4021CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 4.02 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

Acceptable Variation Parameters:

• Power Rating: Substitute parts rated at 0.063W (1/16W) or higher are acceptable
• Features: Additional features such as moisture resistance, automotive qualification (AEC-Q200), or anti-sulfur properties do not prevent substitution
• Packaging format: Both Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats are acceptable
• RoHS and REACH compliance status variations are noted but do not prevent electrical substitution

All substitute parts listed maintain identical electrical performance characteristics and physical dimensions within the specified 0402 package envelope.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications):

The CR0402-FX-4021GLF (Bourns Inc.) and RC0402FR-074K02L (YAGEO) are direct electrical equivalents to the RC1005F4021CS. Both maintain identical resistance, tolerance, power rating, package dimensions, and temperature characteristics. The Bourns part offers high inventory availability (73,389 units). The YAGEO part includes moisture resistance matching the original specification and is available in alternative packaging format (Cut Tape & Digi-Reel).

Enhanced Specification Alternatives:

The ERJ-2RKF4021X (Panasonic Electronic Components) provides upgraded power rating of 0.1W (1/10W) while maintaining all other electrical parameters. This part includes automotive AEC-Q200 qualification and is suitable for applications requiring enhanced thermal performance or automotive-grade reliability.

Automotive-Qualified Substitutes:

The AC0402FR-074K02L, AF0402FR-074K02L (YAGEO), CRCW04024K02FKED, CRCW04024K02FKTD (Vishay Dale), and RMCF0402FT4K02 (Stackpole Electronics Inc) all carry AEC-Q200 automotive qualification. These parts are suitable for designs requiring automotive-grade components. The AF0402FR-074K02L additionally includes anti-sulfur protection. All automotive-qualified parts maintain ROHS3 compliance except CRCW04024K02FKTD, which is RoHS non-compliant and REACH affected.

Compliance Considerations:

For applications requiring ROHS3 compliance and REACH unaffected status, select from: CR0402-FX-4021GLF, RC0402FR-074K02L, ERJ-2RKF4021X, AC0402FR-074K02L, AF0402FR-074K02L, CRCW04024K02FKED, or RMCF0402FT4K02. The CRCW04024K02FKTD variant does not meet these compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RC1005F4021CS with any of the listed parts without circuit redesign?

A: Yes. All listed substitute parts maintain identical electrical specifications (4.02 kOhms ±1%, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range) and physical dimensions (0402 package). Direct substitution is electrically valid without circuit modification.

Q: What is the difference between the main part and the ERJ-2RKF4021X upgrade?

A: The ERJ-2RKF4021X provides a higher power rating of 0.1W (1/10W) compared to the 0.063W (1/16W) rating of the RC1005F4021CS. All other electrical parameters remain identical. This upgrade is suitable for applications with higher power dissipation requirements or for enhanced thermal margin.

Q: Are the automotive AEC-Q200 qualified parts suitable for non-automotive applications?

A: Yes. Automotive-qualified parts meet or exceed standard commercial specifications and are fully compatible with non-automotive designs. The AEC-Q200 qualification indicates enhanced reliability testing and is not restrictive for general use.

Q: Does packaging format (Tape & Reel versus Cut Tape & Digi-Reel) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly processes. Electrical and mechanical specifications remain identical regardless of packaging type. Selection should be based on manufacturing equipment compatibility and supply chain requirements.

Q: What is the significance of moisture resistance in the part specifications?

A: Moisture resistance indicates the component's ability to withstand humid environments without performance degradation. The RC1005F4021CS and several substitute parts (RC0402FR-074K02L, AC0402FR-074K02L) include this feature. Parts without explicit moisture resistance designation (CR0402-FX-4021GLF) maintain standard thick film reliability but may require additional environmental protection in high-humidity applications.

Q: Why is CRCW04024K02FKTD listed if it is RoHS non-compliant?

A: The CRCW04024K02FKTD is included as a substitute option for applications where RoHS compliance is not required. For designs requiring ROHS3 compliance, this part should not be selected. Alternative ROHS3-compliant options are available from the same manufacturer (CRCW04024K02FKED).

Q: Can I use these parts interchangeably in high-reliability or mission-critical applications?

A: Electrical substitution is valid based on matching specifications. However, high-reliability applications may impose additional requirements such as specific manufacturer qualification, traceability documentation, or extended environmental testing. Consult application-specific reliability standards and procurement requirements before final part selection.

Q: What inventory levels should I consider for supply chain planning?

A: Current inventory levels vary significantly: ERJ-2RKF4021X (321,521 units), CR0402-FX-4021GLF (73,389 units), RC0402FR-074K02L (41,258 units), RMCF0402FT4K02 (104,386 units), CRCW04024K02FKED (80,797 units), and CRCW04024K02FKTD (30,069 units). High-volume applications should prioritize parts with larger available inventory to minimize supply risk.