RCS2012F49R9CS Equivalent & Substitute Parts

Part Overview

The RCS2012F49R9CS is a 49.9 Ohm ±1% 1/8W (0.125W) thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This component is classified as Active product status with anti-sulfur and moisture-resistant characteristics. The part is ROHS3 compliant and carries MSL 1 (Unlimited) moisture sensitivity rating.

Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the main part. This reference provides direct component alternatives for procurement, design flexibility, and supply chain continuity.

Substiute Parts

RCS2012F49R9CS

Samsung Electro-MechanicsIn Stock: 941RCS2012F49R9CS Datasheet

Current PartRFQ

AC0805FR-0749R9L

YAGEOIn Stock: 18810AC0805FR-0749R9L Datasheet

SimilarRFQ

CRCW080549R9FKEA

Vishay DaleIn Stock: 82822CRCW080549R9FKEA Datasheet

SimilarRFQ

CRCW080549R9FKEAHP

Vishay DaleIn Stock: 5466CRCW080549R9FKEAHP Datasheet

SimilarRFQ

CRCW080549R9FKTA

Vishay DaleIn Stock: 7901CRCW080549R9FKTA Datasheet

SimilarRFQ

ERJ-6ENF49R9V

Panasonic Electronic ComponentsIn Stock: 186449ERJ-6ENF49R9V Datasheet

SimilarRFQ

ESR10EZPF49R9

Rohm SemiconductorIn Stock: 187632ESR10EZPF49R9 Datasheet

SimilarRFQ

RC0805FR-0749R9L

YAGEOIn Stock: 2457RC0805FR-0749R9L Datasheet

SimilarRFQ

RCS080549R9FKEA

Vishay DaleIn Stock: 53079RCS080549R9FKEA Datasheet

SimilarRFQ

RMCF0805FT49R9

Stackpole Electronics IncIn Stock: 333922RMCF0805FT49R9 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RCS2012F49R9CS are grouped based on strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Resistance value: 49.9 Ohms
• Tolerance: ±1%
• Package / Case: 0805 (2012 Metric)
• Composition: Thick Film
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Sensitivity Level: 1 (Unlimited)
• Number of Terminations: 2

Secondary Consideration:

• Power rating may vary (0.125W, 0.4W, or 0.5W) while maintaining the same package footprint and electrical performance at rated specifications

All identified substitutes meet ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the main part.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Identical Power Rating - 0.125W):

The following parts are direct electrical and mechanical equivalents with matching 0.125W power rating and ROHS3 compliance:

• AC0805FR-0749R9L (YAGEO): ROHS3 compliant, AEC-Q200 rated, 0.60mm seated height
• CRCW080549R9FKEA (Vishay Dale): ROHS3 compliant, AEC-Q200 rated, 0.50mm seated height
• ERJ-6ENF49R9V (Panasonic Electronic Components): ROHS3 compliant, AEC-Q200 rated, 0.70mm seated height
• RC0805FR-0749R9L (YAGEO): ROHS3 compliant, 0.60mm seated height
• RMCF0805FT49R9 (Stackpole Electronics Inc): ROHS3 compliant, AEC-Q200 rated, 0.65mm seated height

Higher Power Rating Alternatives (0.4W or 0.5W):

These parts provide increased power dissipation capability within the same 0805 package footprint:

• CRCW080549R9FKEAHP (Vishay Dale): 0.5W rating, ROHS3 compliant, AEC-Q200 rated, pulse withstanding
• ESR10EZPF49R9 (Rohm Semiconductor): 0.4W rating, ROHS3 compliant, AEC-Q200 rated, pulse withstanding
• RCS080549R9FKEA (Vishay Dale): 0.5W rating, ROHS3 compliant, AEC-Q200 rated, pulse withstanding

Non-Compliant Alternative:

• CRCW080549R9FKTA (Vishay Dale): RoHS non-compliant, REACH affected. Use only in applications where RoHS3 compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RCS2012F49R9CS with a higher power-rated part such as CRCW080549R9FKEAHP (0.5W)?

A: Yes. The 0.5W rated parts (CRCW080549R9FKEAHP, ESR10EZPF49R9, RCS080549R9FKEA) are mechanically and electrically compatible. They occupy the same 0805 package footprint and maintain identical resistance, tolerance, and temperature coefficient specifications. Higher power rating provides additional thermal margin without affecting circuit performance at the original 0.125W operating point.

Q: What is the difference between AC0805FR-0749R9L and RC0805FR-0749R9L, both from YAGEO?

A: Both parts are 49.9 Ohm ±1% 0.125W 0805 resistors from YAGEO with ROHS3 compliance. AC0805FR-0749R9L carries AEC-Q200 automotive qualification and moisture-resistant features. RC0805FR-0749R9L is moisture-resistant without automotive qualification. Selection depends on application requirements for automotive-grade components.

Q: Are all substitute parts AEC-Q200 qualified?

A: No. RC0805FR-0749R9L and the main part RCS2012F49R9CS do not carry AEC-Q200 ratings. All other substitutes (AC0805FR-0749R9L, CRCW series, ERJ-6ENF49R9V, RMCF0805FT49R9) are AEC-Q200 qualified for automotive applications.

Q: What is the significance of seated height variation (0.50mm to 0.70mm)?

A: Seated height affects PCB assembly clearance and solder joint formation. All listed parts maintain the same 0805 package outline and footprint. Height variations within the specified range are acceptable for standard PCB assembly processes. Verify clearance requirements for specific board designs with tight component spacing.

Q: Is CRCW080549R9FKTA suitable for new designs?

A: CRCW080549R9FKTA is RoHS non-compliant and REACH affected. It is not recommended for new designs targeting RoHS3 compliance. Use only in legacy product support or applications where RoHS3 compliance is not mandated.

Q: Can I use these substitutes interchangeably in production?

A: Yes, all ROHS3-compliant direct equivalents (0.125W rated parts) are interchangeable from electrical and mechanical perspectives. Verify with your assembly partner regarding any specific design rules, solder reflow profiles, or component placement constraints that may affect substitution feasibility.