RC1005F430CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F430CS is a 43 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0402 (1005 Metric) package format. This component is rated for 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 carries ROHS3 compliance with MSL Level 1 (Unlimited moisture sensitivity rating).

Equivalent and substitute parts are identified to address supply chain continuity, inventory optimization, and application-specific requirements such as automotive qualification or enhanced power ratings.

Key Parameters

Parameter	Value
Resistance	43 Ohms
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 ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Packaging	Tape & Reel (TR)

Substitute Part Grouping Explanation

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

Core Electrical Parameters:

Resistance value: 43 Ohms
Tolerance: ±1%
Temperature Coefficient: ±100ppm/°C
Operating Temperature Range: -55°C ~ 155°C

Mechanical & Package Parameters:

Package / Case: 0402 (1005 Metric)
Physical dimensions: 0.039" L x 0.020" W (1.00mm x 0.50mm)
Number of Terminations: 2
Composition: Thick Film

Compliance & Environmental:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected

Substitute parts are classified into two categories:

Direct Equivalent: RC0402FR-0743RL (YAGEO) maintains identical electrical specifications, power rating (0.063W), and physical characteristics as the main part.

Upgrade Equivalent: ERJ-2RKF43R0X (Panasonic) provides identical electrical and mechanical specifications with enhanced power rating (0.1W vs. 0.063W) and automotive AEC-Q200 qualification.

Similar Equivalents: AC0402FR-0743RL (YAGEO), CRCW040243R0FKED (Vishay Dale), and RMCF0402FT43R0 (Stackpole Electronics Inc) match all core parameters with automotive AEC-Q200 qualification added to the feature set.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	Features	AEC-Q200	RoHS	MSL
RC1005F430CS	Samsung Electro-Mechanics	43 Ω	±1%	0.063	0402	±100ppm/°C	-55~155°C	Moisture Resistant	No	ROHS3	1
RC0402FR-0743RL	YAGEO	43 Ω	±1%	0.063	0402	±100ppm/°C	-55~155°C	Moisture Resistant	No	ROHS3	1
ERJ-2RKF43R0X	Panasonic Electronic Components	43 Ω	±1%	0.1	0402	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Yes	ROHS3	1
AC0402FR-0743RL	YAGEO	43 Ω	±1%	0.063	0402	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Moisture Resistant	Yes	ROHS3	1
CRCW040243R0FKED	Vishay Dale	43 Ω	±1%	0.063	0402	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Yes	ROHS3	1
RMCF0402FT43R0	Stackpole Electronics Inc	43 Ω	±1%	0.063	0402	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Yes	ROHS3	1

Engineering Selection Recommendations

For Direct Replacement (Non-Automotive Applications): RC0402FR-0743RL (YAGEO) provides identical electrical and mechanical specifications with equivalent moisture-resistant thick film construction. This part is suitable for applications where automotive qualification is not required and maintains full compatibility with the original RC1005F430CS footprint and performance envelope.

For Automotive Applications or Enhanced Reliability: ERJ-2RKF43R0X (Panasonic Electronic Components) is selected when AEC-Q200 automotive qualification is required. This part delivers the same 43 Ohm resistance and tolerance with upgraded power rating (0.1W vs. 0.063W), providing additional thermal margin in the same 0402 package footprint.

For Automotive Applications with Moisture Resistance Requirement: AC0402FR-0743RL (YAGEO) combines automotive AEC-Q200 qualification with moisture-resistant construction, matching the original part's environmental protection features while adding automotive-grade reliability certification.

For High-Volume Automotive Supply: RMCF0402FT43R0 (Stackpole Electronics Inc) and CRCW040243R0FKED (Vishay Dale) both provide AEC-Q200 qualified alternatives with extensive inventory availability and established automotive supply chain presence.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical operating temperature range (-55°C to 155°C), ensuring direct functional compatibility within specified application parameters.

Frequently Asked Questions (FAQ)

Q: Can RC0402FR-0743RL be used as a direct replacement for RC1005F430CS?

A: Yes. RC0402FR-0743RL matches all critical electrical parameters (43 Ohms ±1%, ±100ppm/°C temperature coefficient), power rating (0.063W), package format (0402), and environmental specifications (ROHS3, MSL 1). Physical dimensions and termination count are identical. This part is suitable for direct substitution in non-automotive applications.

Q: What is the difference between the main part and ERJ-2RKF43R0X?

A: ERJ-2RKF43R0X maintains identical resistance, tolerance, temperature coefficient, and operating range. The primary differences are: (1) power rating increased from 0.063W to 0.1W, and (2) addition of AEC-Q200 automotive qualification. The 0402 package footprint remains unchanged. This part is suitable for automotive applications or when enhanced thermal performance is required.

Q: Are all substitute parts compatible with the 0402 package footprint?

A: Yes. All listed substitute parts use the 0402 (1005 Metric) package with identical physical dimensions (0.039" L x 0.020" W, 1.00mm x 0.50mm) and maximum seated height (0.016" or 0.40mm, with AC0402FR-0743RL at 0.015" or 0.37mm). All parts feature two terminations and are suitable for identical PCB layouts.

Q: Which substitute parts carry automotive qualification?

A: ERJ-2RKF43R0X, AC0402FR-0743RL, CRCW040243R0FKED, and RMCF0402FT43R0 all carry AEC-Q200 automotive qualification. RC0402FR-0743RL does not include automotive qualification. Selection depends on application requirements.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All substitute parts listed are ROHS3 compliant with REACH Unaffected status, matching the environmental compliance profile of the main part RC1005F430CS.

Q: What is the moisture sensitivity level for all parts?

A: All parts, including the main part and all substitutes, carry MSL Level 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

Q: Can ERJ-2RKF43R0X be used in applications designed for 0.063W power rating?

A: Yes. ERJ-2RKF43R0X is rated for 0.1W (1/10W) power dissipation, which exceeds the 0.063W requirement of the original part. This provides additional thermal margin and is suitable for direct substitution in applications designed for the lower power rating.

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