RC2012F49R9CS Equivalent & Substitute Parts Reference

Part Overview

The RC2012F49R9CS is a 49.9 Ohm ±1% 1/8W thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This component is classified as Active product status with moisture-resistant construction and RoHS3 compliance. The part is supplied in Tape & Reel packaging with 791 pieces currently in stock inventory.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when supply chain constraints require alternative sourcing, or when design requirements specify components with enhanced certifications such as automotive AEC-Q200 qualification or high-voltage ratings.

Key Parameters

Parameter	Value
Resistance	49.9 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
Number of Terminations	2
RoHS Status	RoHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RC2012F49R9CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 49.9 Ohms
Tolerance: ±1%
Power rating: 0.125W (1/8W)
Package: 0805 (2012 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Number of terminations: 2
RoHS3 compliance

Allowable Variations:

Packaging format (Tape & Reel vs. Cut Tape & Digi-Reel)
Manufacturer identity
Additional certifications (AEC-Q200, high-voltage ratings, pulse withstanding)
Physical height when seated (within component tolerance)
Inventory availability

Parts are classified as Direct Substitutes when all mandatory parameters match exactly with identical packaging specifications. Parts are classified as Similar Substitutes when all mandatory parameters match but packaging format or additional certifications differ.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	RoHS3	MSL	Packaging Type	Additional Features
RC2012F49R9CS	Samsung Electro-Mechanics	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Tape & Reel	Moisture Resistant
CR0805-FX-49R9ELF	Bourns Inc.	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Tape & Reel	Moisture Resistant
ERJ-6ENF49R9V	Panasonic Electronic Components	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Cut Tape & Digi-Reel	Automotive AEC-Q200
KTR10EZPF49R9	Rohm Semiconductor	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Tape & Reel	Automotive AEC-Q200, High Voltage
RC0805FR-0749R9L	YAGEO	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Cut Tape & Digi-Reel	Moisture Resistant
RMCF0805FT49R9	Stackpole Electronics Inc	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Tape & Reel	Automotive AEC-Q200
AC0805FR-0749R9L	YAGEO	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Tape & Reel	Automotive AEC-Q200, Moisture Resistant
CRCW080549R9FKEA	Vishay Dale	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Cut Tape & Digi-Reel	Automotive AEC-Q200
CRCW080549R9FKEAC	Vishay Dale	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Tape & Reel	None specified
CRCW080549R9FKEAHP	Vishay Dale	49.9 Ω	±1%	0.5	0805	±100ppm/°C	-55~155°C	Yes	1	Cut Tape & Digi-Reel	Automotive AEC-Q200, Pulse Withstanding
CRCW080549R9FKEB	Vishay Dale	49.9 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Yes	1	Tape & Reel	Automotive AEC-Q200

Engineering Selection Recommendations

Direct Substitutes (Identical Specifications & Packaging):

The CR0805-FX-49R9ELF from Bourns Inc. is a direct substitute with Tape & Reel packaging matching the RC2012F49R9CS. Both components share identical electrical specifications, moisture-resistant construction, and RoHS3 compliance. Inventory availability is significantly higher at 191,544 pieces.

Substitutes with Packaging Format Variation:

The RC0805FR-0749R9L from YAGEO and CRCW080549R9FKEA from Vishay Dale are functionally equivalent but supplied in Cut Tape & Digi-Reel format instead of Tape & Reel. These parts maintain all electrical and thermal specifications. Selection depends on assembly line compatibility with alternative packaging formats.

Substitutes with Enhanced Certifications:

The ERJ-6ENF49R9V (Panasonic), KTR10EZPF49R9 (Rohm), RMCF0805FT49R9 (Stackpole), AC0805FR-0749R9L (YAGEO), and CRCW080549R9FKEB (Vishay Dale) include automotive AEC-Q200 certification. The KTR10EZPF49R9 additionally features high-voltage rating capability. These parts are suitable for applications requiring automotive-grade reliability without modification to circuit design.

Non-Equivalent Part:

The CRCW080549R9FKEAHP from Vishay Dale has a power rating of 0.5W (1/2W), which differs from the 0.125W (1/8W) specification of the RC2012F49R9CS. This part is not a direct substitute and should not be used as a replacement without circuit re-evaluation.

Discontinued Part:

The CRCW080549R9FKEB is marked as discontinued at DiGi Electronics and should not be selected for new designs or long-term supply planning.

Frequently Asked Questions (FAQ)

Q: Can I use CRCW080549R9FKEAHP as a substitute for RC2012F49R9CS?

A: No. The CRCW080549R9FKEAHP has a power rating of 0.5W (1/2W), while the RC2012F49R9CS is rated at 0.125W (1/8W). Power rating is a critical parameter that cannot be changed without circuit redesign and thermal analysis.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Tape & Reel packaging supplies components on continuous tape suitable for high-speed automated assembly. Cut Tape & Digi-Reel packaging provides components on cut tape segments or reel format for lower-volume or manual assembly processes. Electrical and thermal performance are identical; selection depends on assembly equipment compatibility.

Q: Are AEC-Q200 certified parts compatible with non-automotive applications?

A: Yes. AEC-Q200 certification indicates enhanced reliability testing and qualification for automotive environments. Parts meeting this standard are fully compatible with general industrial and consumer applications and provide equivalent or superior performance.

Q: Does the RC2012F49R9CS have automotive certification?

A: No. The RC2012F49R9CS does not carry AEC-Q200 certification. If automotive-grade reliability is required, substitute parts such as ERJ-6ENF49R9V, KTR10EZPF49R9, RMCF0805FT49R9, AC0805FR-0749R9L, or CRCW080549R9FKEB should be selected.

Q: Can I substitute parts from different manufacturers freely?

A: Yes, provided all electrical parameters, package dimensions, and thermal specifications match exactly. All listed substitute parts maintain identical resistance value (49.9 Ohms), tolerance (±1%), power rating (0.125W), package (0805), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C).

Q: What does MSL 1 (Unlimited) mean?

A: Moisture Sensitivity Level 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry MSL 1 classification.

Q: Is RoHS3 compliance mandatory for all substitutes?

A: Yes. All substitute parts listed maintain RoHS3 compliance, matching the environmental and regulatory requirements of the RC2012F49R9CS.

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