RC1005F1240CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F1240CS is a 124 Ohms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0402 (1005 Metric) package format. This component is rated at 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 Level 1 (Unlimited moisture sensitivity).

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific application requirements such as automotive qualification or enhanced power ratings.

Substiute Parts

RC1005F1240CS

Samsung Electro-MechanicsIn Stock: 1009RC1005F1240CS Datasheet

Current PartRFQ

CR0402-FX-1240GLF

Bourns Inc.In Stock: 36334CR0402-FX-1240GLF Datasheet

DirectRFQ

RC0402FR-07124RL

YAGEOIn Stock: 1001234RC0402FR-07124RL Datasheet

DirectRFQ

ERJ-2RKF1240X

Panasonic Electronic ComponentsIn Stock: 154045ERJ-2RKF1240X Datasheet

UpgradeRFQ

CRCW0402124RFKED

Vishay DaleIn Stock: 50286CRCW0402124RFKED Datasheet

SimilarRFQ

RMCF0402FT124R

Stackpole Electronics IncIn Stock: 4705RMCF0402FT124R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC1005F1240CS is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Resistance value: 124 Ohms
• Tolerance: ±1%
• Package format: 0402 (1005 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C
• Termination count: 2
• RoHS3 compliance
• MSL Level 1 rating

Substitution Categories:

Direct Substitutes maintain identical electrical and mechanical specifications including 0.063W (1/16W) power rating and moisture-resistant features. These parts are functionally interchangeable without circuit redesign.

Upgrade Substitutes exceed the original power rating specification (0.1W / 1/10W) while maintaining all other parameters. These components provide enhanced thermal performance and are suitable for applications requiring higher power dissipation margins.

Similar Substitutes match all core electrical and mechanical parameters but include automotive AEC-Q200 qualification. These parts are suitable for applications requiring automotive-grade reliability without circuit modification.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (CR0402-FX-1240GLF, RC0402FR-07124RL): These components provide functional equivalence to the RC1005F1240CS with identical electrical specifications and package dimensions. Selection between these direct substitutes is based on inventory availability and supply chain logistics. Both maintain ROHS3 compliance and MSL Level 1 rating. The RC0402FR-07124RL from YAGEO includes moisture-resistant construction matching the original part specification.

Upgrade Substitute (ERJ-2RKF1240X): The Panasonic ERJ-2RKF1240X provides enhanced power rating at 0.1W (1/10W) compared to the 0.063W (1/16W) specification of the main part. This upgrade is suitable for applications requiring improved thermal margin or higher power dissipation capability. The component includes automotive AEC-Q200 qualification and maintains all other electrical parameters. Circuit redesign is not required for this substitution.

Similar Substitutes (CRCW0402124RFKED, RMCF0402FT124R): The Vishay Dale CRCW0402124RFKED and Stackpole Electronics RMCF0402FT124R maintain identical electrical and mechanical specifications to the RC1005F1240CS while incorporating automotive AEC-Q200 qualification. These components are suitable for applications requiring automotive-grade reliability or when sourcing from automotive-qualified suppliers is mandated by design requirements or procurement specifications.

Frequently Asked Questions (FAQ)

Q: Can CR0402-FX-1240GLF be used as a direct replacement for RC1005F1240CS?

A: Yes. The CR0402-FX-1240GLF from Bourns Inc. is a direct substitute. Both components share identical resistance (124 Ohms), tolerance (±1%), power rating (0.063W), package format (0402), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). Both are ROHS3 compliant with MSL Level 1 rating. The primary difference is that the Bourns part does not specify moisture-resistant construction, whereas the Samsung part includes this feature.

Q: What is the difference between the ERJ-2RKF1240X upgrade substitute and the main part?

A: The ERJ-2RKF1240X from Panasonic provides a higher power rating of 0.1W (1/10W) compared to the RC1005F1240CS at 0.063W (1/16W). All other electrical parameters remain identical. The upgrade component also includes automotive AEC-Q200 qualification. This higher power rating allows for greater thermal headroom in applications with higher power dissipation requirements. No circuit modification is required for this substitution.

Q: Are CRCW0402124RFKED and RMCF0402FT124R suitable for non-automotive applications?

A: Yes. Both the Vishay Dale CRCW0402124RFKED and Stackpole Electronics RMCF0402FT124R are suitable for general-purpose applications. The automotive AEC-Q200 qualification indicates enhanced reliability and quality standards but does not restrict use to automotive applications. These components maintain identical electrical specifications to the RC1005F1240CS and are fully compatible with standard industrial and consumer applications.

Q: Does the 0402 package dimension remain consistent across all substitute parts?

A: Yes. All substitute parts listed maintain the 0402 (1005 Metric) package format with identical dimensions of 0.039" L x 0.020" W (1.00mm x 0.50mm) and maximum seated height of 0.016" (0.40mm). PCB footprint and assembly compatibility are maintained across all substitutes.

Q: What is the significance of MSL Level 1 rating for all listed parts?

A: MSL (Moisture Sensitivity Level) Level 1 indicates unlimited shelf life without moisture control requirements. All listed parts, including the main RC1005F1240CS and all substitutes, carry this rating. This means the components do not require special moisture-controlled storage conditions and can be stored and handled under standard industrial conditions without degradation.

Q: Can RC0402FR-07124RL replace RC1005F1240CS in moisture-sensitive applications?

A: Yes. The RC0402FR-07124RL from YAGEO includes moisture-resistant construction matching the original part specification. Both components are suitable for applications requiring moisture resistance. The YAGEO part maintains identical electrical specifications and ROHS3 compliance with MSL Level 1 rating.