RC1005F4122CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F4122CS is a 41.2 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0402 (1005 Metric) package format. This surface mount device 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 is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements such as automotive qualification or enhanced power ratings.

Substiute Parts

RC1005F4122CS

Samsung Electro-MechanicsIn Stock: 806RC1005F4122CS Datasheet

Current PartRFQ

CR0402-FX-4122GLF

Bourns Inc.In Stock: 52301CR0402-FX-4122GLF Datasheet

DirectRFQ

RC0402FR-0741K2L

YAGEOIn Stock: 248411RC0402FR-0741K2L Datasheet

DirectRFQ

ERJ-2RKF4122X

Panasonic Electronic ComponentsIn Stock: 277409ERJ-2RKF4122X Datasheet

UpgradeRFQ

AC0402FR-0741K2L

YAGEOIn Stock: 19087AC0402FR-0741K2L Datasheet

SimilarRFQ

CRCW040241K2FKED

Vishay DaleIn Stock: 63616CRCW040241K2FKED Datasheet

SimilarRFQ

CRCW040241K2FKTD

Vishay DaleIn Stock: 8845CRCW040241K2FKTD Datasheet

SimilarRFQ

RMCF0402FT41K2

Stackpole Electronics IncIn Stock: 447195RMCF0402FT41K2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1005F4122CS is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Resistance value: 41.2 kOhms
• Tolerance: ±1%
• Package / Case: 0402 (1005 Metric)
• Composition: Thick Film
• Temperature Coefficient: ±100 ppm/°C
• Operating Temperature Range: -55°C to 155°C
• Number of Terminations: 2
• Physical dimensions: 0.039" L × 0.020" W (1.00mm × 0.50mm)

Secondary Considerations:

• Power rating (0.063W baseline; upgrades to 0.1W permitted)
• Packaging format (Tape & Reel or Cut Tape & Digi-Reel acceptable)
• Compliance certifications (RoHS3, REACH status)
• Automotive qualification (AEC-Q200 optional enhancement)
• Moisture resistance feature (present in main part; optional in substitutes)

Substitute parts are classified into three categories:

Direct Substitutes: Identical electrical and mechanical specifications with equivalent packaging.

Upgrade Substitutes: Enhanced power rating (0.1W vs. 0.063W) with automotive AEC-Q200 qualification, maintaining all other parameters.

Similar Substitutes: Automotive-qualified variants with identical base specifications but different packaging or compliance profiles.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution (No Application Constraints):

CR0402-FX-4122GLF (Bourns Inc.) and RC0402FR-0741K2L (YAGEO) are direct functional equivalents to the RC1005F4122CS. Both maintain identical electrical specifications, 0402 package geometry, and ROHS3 compliance. Selection between these options is based on packaging preference (Tape & Reel vs. Cut Tape & Digi-Reel) and inventory availability.

Upgrade Path (Enhanced Reliability):

ERJ-2RKF4122X (Panasonic Electronic Components) provides a power rating upgrade from 0.063W to 0.1W while maintaining all other electrical parameters. This part includes automotive AEC-Q200 qualification, suitable for applications requiring enhanced thermal margin or automotive-grade reliability. The Cut Tape & Digi-Reel packaging format differs from the original Tape & Reel format.

Automotive Applications:

AC0402FR-0741K2L (YAGEO), CRCW040241K2FKED (Vishay Dale), and RMCF0402FT41K2 (Stackpole Electronics Inc) are AEC-Q200 qualified alternatives. These parts are suitable for automotive and high-reliability applications. AC0402FR-0741K2L additionally includes moisture resistant characteristics matching the original part. All three maintain ROHS3 compliance and identical electrical specifications.

Compliance Consideration:

CRCW040241K2FKTD (Vishay Dale) is functionally equivalent but carries RoHS non-compliant status and REACH Affected designation. This part is suitable only for applications where RoHS3 compliance is not required.

Inventory and Availability:

RMCF0402FT41K2 (Stackpole Electronics Inc) offers the highest inventory level (447,121 pcs) among all substitutes, followed by RC0402FR-0741K2L (YAGEO) with 248,377 pcs. These options provide supply chain security for high-volume procurement.

Frequently Asked Questions (FAQ)

Q1: Can I substitute RC1005F4122CS with CR0402-FX-4122GLF without circuit redesign?

A: Yes. CR0402-FX-4122GLF is a direct substitute with identical resistance (41.2 kOhms), tolerance (±1%), power rating (0.063W), package (0402), and operating temperature range (-55°C to 155°C). Both parts are ROHS3 compliant and have MSL 1 rating. The only difference is manufacturer (Bourns vs. Samsung Electro-Mechanics) and packaging format availability.

Q2: What is the difference between the 0.063W and 0.1W power ratings?

A: The RC1005F4122CS is rated at 0.063W (1/16W), while ERJ-2RKF4122X is rated at 0.1W (1/10W). The 0.1W rating provides greater thermal headroom and allows the resistor to dissipate more power without exceeding temperature limits. This upgrade is backward compatible—a 0.1W resistor can be used in applications designed for 0.063W without performance degradation, but not vice versa.

Q3: Are AEC-Q200 qualified parts interchangeable with non-qualified parts?

A: AEC-Q200 qualified parts (AC0402FR-0741K2L, CRCW040241K2FKED, RMCF0402FT41K2, ERJ-2RKF4122X) meet automotive reliability standards and are suitable for automotive and high-reliability applications. They are electrically and mechanically interchangeable with non-qualified parts (RC1005F4122CS, CR0402-FX-4122GLF, RC0402FR-0741K2L) in non-automotive applications. However, automotive applications must use AEC-Q200 qualified parts.

Q4: Does packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly processes. Tape & Reel (TR) and Cut Tape & Digi-Reel (CT) formats contain identical components with identical electrical specifications. Selection is based on manufacturing equipment compatibility and procurement requirements.

Q5: Why is CRCW040241K2FKTD marked as RoHS non-compliant?

A: CRCW040241K2FKTD carries RoHS non-compliant status and REACH Affected designation, indicating it does not meet current environmental compliance standards. This part should be used only in applications or regions where RoHS3 compliance is not mandated. All other substitutes listed are ROHS3 compliant.

Q6: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 indicates the lowest moisture sensitivity level. Parts with MSL 1 rating do not require special moisture control during storage, handling, or assembly. They can be stored at room temperature without desiccant packaging and have unlimited shelf life under normal conditions.

Q7: Can I use RC0402FR-0741K2L (YAGEO) as a direct replacement for RC1005F4122CS (Samsung)?

A: Yes. RC0402FR-0741K2L is a direct substitute with identical electrical specifications (41.2 kOhms ±1%, 0.063W, 0402 package, ±100 ppm/°C, -55°C to 155°C). Both parts include moisture resistant characteristics and are ROHS3 compliant. The difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel) and manufacturer (YAGEO vs. Samsung Electro-Mechanics).

Q8: Which substitute offers the best supply chain security?

A: RMCF0402FT41K2 (Stackpole Electronics Inc) offers the highest inventory level at 447,121 pcs, followed by RC0402FR-0741K2L (YAGEO) at 248,377 pcs. Both parts are ROHS3 compliant and AEC-Q200 qualified (RMCF0402FT41K2 only), providing reliable long-term availability for high-volume applications.