RC1005F3243CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F3243CS is a 324 kOhm ±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 construction and operates across the temperature range of -55°C to 155°C. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental ratings to ensure direct circuit board compatibility.

Key Parameters

Parameter	Value
Resistance	324 kOhms
Tolerance	±1%
Power Rating	0.063W (1/16W)
Package / Case	0402 (1005 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Size / Dimension	0.039" L x 0.020" W (1.00mm x 0.50mm)
Height - Seated (Max)	0.016" (0.40mm)
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the RC1005F3243CS are classified based on strict electrical and mechanical parameter matching. All substitute candidates maintain identical resistance value (324 kOhms), tolerance (±1%), package format (0402 / 1005 Metric), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). Substitution eligibility is determined by the following critical parameters:

Electrical Compatibility: Resistance, tolerance, temperature coefficient, and operating temperature range must be identical across all substitute parts.

Mechanical Compatibility: Package designation (0402), physical dimensions (0.039" L x 0.020" W), and termination count (2) must match exactly.

Environmental & Compliance: All substitute parts maintain RoHS3 compliance, MSL 1 rating, and REACH unaffected status.

Power Rating Consideration: The main part is rated at 0.063W (1/16W). One upgrade substitute (ERJ-2RKF3243X) is rated at 0.1W (1/10W), providing higher power dissipation capability while maintaining all other electrical parameters.

Feature Differentiation: Substitute parts are grouped by additional features such as moisture resistance, automotive AEC-Q200 qualification, and anti-sulfur construction, which do not affect core electrical substitution but provide enhanced environmental performance for specific applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Temp Coeff	Op. Temp Range	Features	RoHS3	MSL
RC1005F3243CS	Samsung Electro-Mechanics	324 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Yes	1
CR0402-FX-3243GLF	Bourns Inc.	324 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	—	Yes	1
RC0402FR-07324KL	YAGEO	324 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Yes	1
ERJ-2RKF3243X	Panasonic Electronic Components	324 kOhms	±1%	0.1W	0402	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Yes	1
AF0402FR-07324KL	YAGEO	324 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Anti-Sulfur, Automotive AEC-Q200	Yes	1
CRCW0402324KFKED	Vishay Dale	324 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Yes	1
RMCF0402FT324K	Stackpole Electronics Inc	324 kOhms	±1%	0.063W	0402	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Yes	1

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full RoHS3 compliance, ensuring regulatory alignment with the original RC1005F3243CS specification. Selection between equivalent parts should be based on the following criteria:

Direct Equivalents (Identical Specifications): CR0402-FX-3243GLF (Bourns Inc.) and RC0402FR-07324KL (YAGEO) provide direct electrical and mechanical equivalence with identical 0.063W power rating and operating parameters.

Upgrade Option (Higher Power Rating): ERJ-2RKF3243X (Panasonic Electronic Components) offers 0.1W (1/10W) power rating while maintaining all other electrical specifications. This part is suitable for applications requiring higher thermal margin or increased power dissipation capability.

Automotive-Qualified Alternatives: AF0402FR-07324KL (YAGEO), CRCW0402324KFKED (Vishay Dale), and RMCF0402FT324K (Stackpole Electronics Inc) carry AEC-Q200 automotive qualification. AF0402FR-07324KL additionally includes anti-sulfur construction for enhanced environmental resistance.

Inventory Availability: RC0402FR-07324KL (YAGEO) maintains the highest inventory level (384,600 pcs), followed by ERJ-2RKF3243X (Panasonic, 198,669 pcs) and RMCF0402FT324K (Stackpole, 142,158 pcs).

All substitute parts are packaged in 0402 (1005 Metric) format with identical physical dimensions and termination configuration, ensuring direct board-level compatibility without layout modification.

Frequently Asked Questions (FAQ)

Q: Can CR0402-FX-3243GLF be used as a direct replacement for RC1005F3243CS?

A: Yes. CR0402-FX-3243GLF matches all critical electrical parameters (324 kOhms ±1%, 0.063W, ±100ppm/°C, -55°C to 155°C) and mechanical specifications (0402 package, identical dimensions). Both parts are RoHS3 compliant with MSL 1 rating.

Q: What is the difference between the main part and ERJ-2RKF3243X?

A: ERJ-2RKF3243X is rated at 0.1W (1/10W) compared to the main part's 0.063W (1/16W). All other electrical parameters are identical. The higher power rating provides increased thermal capability for applications with higher power dissipation requirements.

Q: Are automotive-qualified parts (AEC-Q200) compatible with non-automotive applications?

A: Yes. Automotive-qualified parts meet or exceed standard industrial specifications. Parts such as AF0402FR-07324KL, CRCW0402324KFKED, and RMCF0402FT324K can be used in non-automotive applications without restriction.

Q: Does the moisture-resistant feature of RC1005F3243CS affect substitution compatibility?

A: No. Moisture resistance is an additional feature that does not impact electrical substitution. Parts without explicit moisture-resistant designation (such as CR0402-FX-3243GLF) maintain the same MSL 1 rating and are fully compatible.

Q: Can these 0402 resistors be substituted with larger package sizes?

A: No. Package format (0402 / 1005 Metric) is a critical mechanical parameter. Larger packages (0603, 0805) have different physical dimensions and cannot be used without circuit board layout modification.

Q: What does ±100ppm/°C temperature coefficient mean for circuit performance?

A: Temperature coefficient specifies resistance change per degree Celsius. At ±100ppm/°C, a 324 kOhm resistor changes by approximately 32.4 Ohms per degree Celsius across the -55°C to 155°C operating range. All listed substitute parts maintain identical temperature coefficient.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: Most substitute parts are available in Tape & Reel packaging. RC0402FR-07324KL (YAGEO) is available in Cut Tape (CT) & Digi-Reel® packaging. Packaging format should be confirmed during procurement based on assembly requirements.

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