RC2012F430CS Equivalent & Substitute Parts Reference

Part Overview

The RC2012F430CS is a 43 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.125W (1/8W) in 0805 (2012 Metric) package format. This component is classified as Active product status with moisture-resistant construction and RoHS3 compliance. Equivalent and substitute parts are identified when identical electrical specifications and mechanical compatibility are maintained across alternative manufacturers. This reference provides direct substitutes and similar alternatives for procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Resistance	43 Ohms
Tolerance	±1%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	RoHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

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

Primary Substitution Criteria:

Resistance value: 43 Ohms (exact match required)
Tolerance: ±1% (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Power Rating: 0.125W (1/8W) (exact match required)
Composition: Thick Film (exact match required)
Temperature Coefficient: ±100ppm/°C (exact match required)
Operating Temperature Range: -55°C ~ 155°C (exact match required)
Terminations: 2 (exact match required)

Direct Substitutes meet all primary criteria and are functionally interchangeable without design modification.

Similar Alternatives meet all primary criteria but include additional features (automotive AEC-Q200 certification, pulse withstanding capability) or differ in power rating, requiring design verification for specific applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp (°C)	Height Max (mm)	Features	Product Status
RC2012F430CS	Samsung Electro-Mechanics	43Ω	±1%	0.125	0805	±100ppm/°C	-55~155	0.65	Moisture Resistant	Active
CR0805-FX-43R0ELF	Bourns Inc.	43Ω	±1%	0.125	0805	±100ppm/°C	-55~155	0.60	Moisture Resistant	Active
ERJ-6ENF43R0V	Panasonic Electronic Components	43Ω	±1%	0.125	0805	±100ppm/°C	-55~155	0.70	Automotive AEC-Q200	Active
RC0805FR-0743RL	YAGEO	43Ω	±1%	0.125	0805	±100ppm/°C	-55~155	0.60	Moisture Resistant	Active
RMCF0805FT43R0	Stackpole Electronics Inc	43Ω	±1%	0.125	0805	±100ppm/°C	-55~155	0.65	Automotive AEC-Q200	Active
AC0805FR-0743RL	YAGEO	43Ω	±1%	0.125	0805	±100ppm/°C	-55~155	0.60	Automotive AEC-Q200, Moisture Resistant	Active
CRCW080543R0FKEA	Vishay Dale	43Ω	±1%	0.125	0805	±100ppm/°C	-55~155	0.50	Automotive AEC-Q200	Active
CRCW080543R0FKEAHP	Vishay Dale	43Ω	±1%	0.5	0805	±100ppm/°C	-55~155	0.50	Automotive AEC-Q200, Pulse Withstanding	Active
ESR10EZPF43R0	Rohm Semiconductor	43Ω	±1%	0.4	0805	±100ppm/°C	-55~155	0.65	Automotive AEC-Q200, Pulse Withstanding	Active
MCR10ERTF43R0	Rohm Semiconductor	43Ω	±1%	0.125	0805	±100ppm/°C	-55~155	0.65	None specified	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Direct Substitutes (Functionally Equivalent):

CR0805-FX-43R0ELF (Bourns Inc.) and RC0805FR-0743RL (YAGEO) are direct functional equivalents to RC2012F430CS. Both maintain identical electrical specifications, package format, and moisture-resistant composition. Both are Active status products with full RoHS3 compliance. Selection between these and the original part is based on availability and procurement preference.

Automotive-Qualified Alternatives:

ERJ-6ENF43R0V (Panasonic), RMCF0805FT43R0 (Stackpole), AC0805FR-0743RL (YAGEO), and CRCW080543R0FKEA (Vishay Dale) include AEC-Q200 automotive qualification in addition to meeting all primary electrical and mechanical specifications. These parts are suitable for applications requiring automotive-grade reliability. All are Active status products with RoHS3 compliance.

Higher Power Rating Alternative:

CRCW080543R0FKEAHP (Vishay Dale) provides 0.5W (1/2W) power rating in the same 0805 package with AEC-Q200 qualification and pulse withstanding capability. This part is suitable only for applications where increased power dissipation capacity is required and design accommodation for higher power rating is acceptable.

Enhanced Power Capability:

ESR10EZPF43R0 (Rohm Semiconductor) offers 0.4W (2/5W) power rating with AEC-Q200 qualification and pulse withstanding features in the 0805 package. This part is suitable for applications requiring intermediate power handling between standard 0.125W and 0.5W ratings.

Discontinued Product:

MCR10ERTF43R0 (Rohm Semiconductor) is discontinued at DiGi Electronics and should not be selected for new designs. Existing inventory may be available through alternative distribution channels.

Frequently Asked Questions (FAQ)

Q: Can CR0805-FX-43R0ELF replace RC2012F430CS without design modification?

A: Yes. CR0805-FX-43R0ELF meets all primary substitution criteria: 43 Ohm resistance, ±1% tolerance, 0.125W power rating, 0805 package, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. Both are moisture-resistant thick film compositions with RoHS3 compliance. No design modification is required.

Q: What is the difference between moisture-resistant and automotive AEC-Q200 qualified parts?

A: Moisture-resistant construction addresses environmental protection against humidity exposure. Automotive AEC-Q200 qualification indicates compliance with automotive industry reliability and quality standards, including additional testing and qualification requirements. Parts with both features (such as AC0805FR-0743RL) provide both environmental protection and automotive-grade reliability assurance.

Q: Can CRCW080543R0FKEAHP (0.5W) be used in place of RC2012F430CS (0.125W)?

A: CRCW080543R0FKEAHP is electrically equivalent in resistance, tolerance, and temperature characteristics but differs in power rating. This part can be used only if the circuit design accommodates the higher power rating and if the increased component size or thermal characteristics do not create layout or thermal management issues. Design verification is required.

Q: Why is MCR10ERTF43R0 listed as discontinued?

A: MCR10ERTF43R0 is marked as discontinued at DiGi Electronics, indicating it is no longer actively distributed through this channel. For new designs, selection from Active status alternatives is recommended. Existing inventory may be available through other distribution sources.

Q: Are all listed substitutes available in Tape & Reel packaging?

A: Most substitutes are available in Tape & Reel (TR) packaging. MCR10ERTF43R0 is supplied in Cut Tape (CT) & Digi-Reel® format. Packaging format should be verified during procurement to ensure compatibility with assembly equipment and processes.

Q: What is the significance of the 0805 (2012 Metric) package designation?

A: 0805 and 2012 Metric are equivalent designations for the same physical package size: 0.079" L x 0.049" W (2.00mm x 1.25mm). All listed parts use this identical package format, ensuring mechanical compatibility with PCB footprints and assembly processes.

Q: Can parts with different height specifications be interchanged?

A: All listed parts fit within the 0805 package envelope and are designed for standard PCB assembly. Height variations (ranging from 0.50mm to 0.70mm maximum seated height) are within normal manufacturing tolerances for this package class. Mechanical interchangeability is maintained across all listed parts.

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