RC1005J242CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005J242CS is a 2.4 kOhms ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.063W (1/16W) in 0402 (1005 Metric) package format. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). The part is designed for general-purpose applications requiring moisture-resistant thick film construction across the operating temperature range of -55°C to 155°C.

Equivalent and substitute parts are necessary when the original RC1005J242CS becomes unavailable, when design requirements demand enhanced tolerance specifications, when automotive-grade qualification is required, or when alternative packaging formats are needed for supply chain optimization.

Key Parameters

Parameter	Value	Specification Basis
Resistance	2.4 kOhms	Core electrical specification
Tolerance	±5%	Accuracy classification
Power Rating	0.063W (1/16W)	Thermal dissipation capability
Package / Case	0402 (1005 Metric)	Physical form factor
Composition	Thick Film	Construction technology
Temperature Coefficient	±100ppm/°C	Stability specification
Operating Temperature Range	-55°C to 155°C	Environmental limits
RoHS Status	ROHS3 Compliant	Environmental compliance
Moisture Sensitivity Level	MSL 1 (Unlimited)	Handling requirement

Substitute Part Grouping Explanation

Substitution logic for the RC1005J242CS is determined by strict adherence to the following critical parameters:

Primary Substitution Criteria:

Resistance value: 2.4 kOhms (exact match required)
Package / Case: 0402 (1005 Metric) (exact match required)
Composition: Thick Film (exact match required)
Temperature Coefficient: ±100ppm/°C (exact match required)
Operating Temperature Range: -55°C to 155°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)
Moisture Sensitivity Level: MSL 1 (exact match required)

Secondary Substitution Parameters (Allowable Variations):

Tolerance: ±5% (main part) can be substituted with ±1% (upgrade specification)
Power Rating: 0.063W (main part) can be substituted with 0.1W (higher rating acceptable)
Manufacturer: Different manufacturers acceptable if all primary criteria met
Packaging Format: Cut Tape (CT) and Tape & Reel (TR) formats are interchangeable
Features: Moisture Resistant and Automotive AEC-Q200 certifications are additive enhancements

Substitution Categories:

Upgrade Parts (Enhanced tolerance ±1%): RC1005F242CS, CRG0402F2K4, ERJ-2RKF2401X, RC0402FR-072K4L, RMCF0402FT2K40

Direct Equivalent (Identical specifications, different manufacturer): RC0402JR-072K4L

Similar Parts (Same tolerance ±5%, additional certifications): AC0402JR-072K4L, RMCF0402JT2K40

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	Features	Certifications	RoHS	MSL
RC1005J242CS	Samsung Electro-Mechanics	2.4 kΩ	±5%	0.063	0402	±100ppm/°C	-55 to 155°C	Moisture Resistant	—	ROHS3	1
RC1005F242CS	Samsung Electro-Mechanics	2.4 kΩ	±1%	0.063	0402	±100ppm/°C	-55 to 155°C	Moisture Resistant	—	ROHS3	1
RC0402JR-072K4L	YAGEO	2.4 kΩ	±5%	0.063	0402	±100ppm/°C	-55 to 155°C	Moisture Resistant	—	ROHS3	1
CRG0402F2K4	TE Connectivity Passive Product	2.4 kΩ	±1%	0.063	0402	±100ppm/°C	-55 to 155°C	—	—	ROHS3	1
ERJ-2RKF2401X	Panasonic Electronic Components	2.4 kΩ	±1%	0.1	0402	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	AEC-Q200	ROHS3	1
RC0402FR-072K4L	YAGEO	2.4 kΩ	±1%	0.063	0402	±100ppm/°C	-55 to 155°C	Moisture Resistant	—	ROHS3	1
RMCF0402FT2K40	Stackpole Electronics Inc	2.4 kΩ	±1%	0.063	0402	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	AEC-Q200	ROHS3	1
AC0402JR-072K4L	YAGEO	2.4 kΩ	±5%	0.063	0402	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200, Moisture Resistant	AEC-Q200	ROHS3	1
RMCF0402JT2K40	Stackpole Electronics Inc	2.4 kΩ	±5%	0.063	0402	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	AEC-Q200	ROHS3	1

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): RC0402JR-072K4L (YAGEO) serves as a direct equivalent with identical electrical and mechanical specifications. This part maintains ±5% tolerance, 0.063W power rating, and moisture-resistant thick film construction. Selection is appropriate when supply continuity is the primary concern and no performance enhancement is required.

For Enhanced Tolerance Applications: RC1005F242CS, RC0402FR-072K4L, CRG0402F2K4, and RMCF0402FT2K40 provide ±1% tolerance specification, representing an upgrade from the ±5% tolerance of the main part. These parts are suitable for applications requiring tighter resistance accuracy while maintaining all other electrical and mechanical parameters. All four parts retain ROHS3 compliance and MSL 1 rating.

For Automotive Applications: ERJ-2RKF2401X (Panasonic), RMCF0402FT2K40 (Stackpole), AC0402JR-072K4L (YAGEO), and RMCF0402JT2K40 (Stackpole) carry AEC-Q200 automotive qualification. These parts are specified for applications requiring automotive-grade reliability. ERJ-2RKF2401X and RMCF0402FT2K40 additionally provide ±1% tolerance. AC0402JR-072K4L and RMCF0402JT2K40 maintain ±5% tolerance matching the original part.

For Higher Power Dissipation: ERJ-2RKF2401X provides 0.1W (1/10W) power rating compared to the 0.063W (1/16W) of the main part, offering increased thermal capability. This part is selected when circuit design requires higher power dissipation margin while maintaining the 2.4 kOhms resistance value and ±1% tolerance.

Compliance Verification: All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, ensuring compatibility with existing supply chain and assembly processes. REACH status is either "REACH Unaffected" or "Vendor Undefined," confirming no regulatory barriers to substitution.

Frequently Asked Questions (FAQ)

Q: Can RC0402JR-072K4L replace RC1005J242CS in all applications?

A: RC0402JR-072K4L is a direct equivalent with identical electrical specifications (2.4 kOhms ±5%, 0.063W) and mechanical package (0402). Both parts share identical temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and moisture-resistant thick film construction. Substitution is valid for all applications where the original part was specified.

Q: What is the difference between ±5% and ±1% tolerance parts?

A: Tolerance defines the allowable deviation from the nominal resistance value. RC1005J242CS with ±5% tolerance allows resistance values between 2.28 kOhms and 2.52 kOhms. Upgrade parts with ±1% tolerance (RC1005F242CS, RC0402FR-072K4L, CRG0402F2K4, RMCF0402FT2K40) restrict values to 2.376 kOhms to 2.424 kOhms. Selection of ±1% parts is necessary only when circuit design requires tighter resistance accuracy.

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

A: Yes. AEC-Q200 certification indicates enhanced reliability testing and qualification for automotive environments. Parts carrying this certification (ERJ-2RKF2401X, RMCF0402FT2K40, AC0402JR-072K4L, RMCF0402JT2K40) meet or exceed the electrical and mechanical specifications of non-automotive parts. These components are fully compatible with non-automotive applications and provide additional reliability margin.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: Moisture Sensitivity Level (MSL) 1 indicates unlimited shelf life without moisture-related degradation. RC1005J242CS and all listed substitute parts carry MSL 1 rating, meaning no special moisture-control storage or handling procedures are required. Components can be stored and handled under standard industrial conditions without risk of moisture absorption damage.

Q: Can I substitute a 0.1W part for a 0.063W part?

A: Yes, when the substitute part meets all other specifications. ERJ-2RKF2401X provides 0.1W power rating compared to 0.063W of the main part. Higher power rating indicates greater thermal dissipation capability and is acceptable as a substitute. The circuit will not experience adverse effects from the higher power rating; the resistor will simply operate with additional thermal margin.

Q: Are Cut Tape (CT) and Tape & Reel (TR) packaging formats interchangeable?

A: Cut Tape and Tape & Reel formats represent different supply packaging methods for the same component. Both formats contain identical parts with identical electrical and mechanical specifications. Selection between CT and TR depends on assembly process requirements and inventory management practices, not on component performance or compatibility.

Q: What does ROHS3 compliance mean for this resistor?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance certifies that the component contains no lead, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, or bis(2-ethylhexyl) phthalate above specified thresholds. All listed substitute parts maintain ROHS3 compliance, ensuring compatibility with environmental regulations and assembly processes requiring lead-free components.

Q: Which substitute part offers the best overall specification match?

A: RC0402JR-072K4L (YAGEO) provides identical specifications to RC1005J242CS across all parameters: 2.4 kOhms ±5%, 0.063W, 0402 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, moisture-resistant construction, ROHS3 compliance, and MSL 1 rating. This part is the direct equivalent when no specification enhancement is required.

Q: Should I select an upgrade part with ±1% tolerance?

A: Selection of ±1% tolerance parts (RC1005F242CS, RC0402FR-072K4L, CRG0402F2K4, RMCF0402FT2K40) is determined by circuit design requirements. If the original design specified ±5% tolerance and the circuit functions correctly with this tolerance, upgrade to ±1% is not necessary. Upgrade selection is appropriate only when circuit analysis or design revision requires tighter tolerance specification.

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