Equivalent & Substitute Parts for RC2012F6491CS

Part Overview

The RC2012F6491CS is a 6.49 kOhms ±1% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with moisture resistant characteristics and unlimited moisture sensitivity level (MSL 1). The part is supplied in Tape & Reel packaging and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and package compatibility to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Specification Range
Resistance	6.49 kOhms	Exact match required
Tolerance	±1%	Exact match required
Power Rating	0.125W (1/8W)	Equal or higher acceptable
Package / Case	0805 (2012 Metric)	Exact match required
Composition	Thick Film	Exact match required
Temperature Coefficient	±100ppm/°C	Exact match required
Operating Temperature Range	-55°C ~ 155°C	Equal or wider acceptable
RoHS Status	ROHS3 Compliant	Exact match required
Moisture Sensitivity Level	MSL 1 (Unlimited)	Equal or lower acceptable

Substitute Part Grouping Explanation

Substitute parts for RC2012F6491CS are classified into three categories based on electrical and mechanical parameter alignment:

Direct Equivalent (Interchangeable): Parts matching all critical parameters including 0.125W power rating, 6.49 kOhms resistance, ±1% tolerance, 0805 package, ±100ppm/°C temperature coefficient, and ROHS3 compliance. These parts are functionally identical and can be used as direct replacements without circuit redesign.

Upgrade Equivalent (Higher Performance): Parts with identical electrical specifications but enhanced automotive qualification (AEC-Q200 rating). These parts maintain the same 0.125W power rating and all other core parameters while adding automotive-grade reliability certification.

Higher Power Rating Variants (Derated Application): Parts with identical resistance, tolerance, and package but increased power rating (0.5W instead of 0.125W). These parts provide additional thermal margin and can be used in applications where the original 0.125W rating is marginal, though they occupy the same physical footprint.

All substitute parts maintain exact matching of: resistance value (6.49 kOhms), tolerance (±1%), package (0805), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and RoHS3 compliance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Features	Height Max (mm)	RoHS3	MSL
RC2012F6491CS	Samsung Electro-Mechanics	6.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Moisture Resistant	0.66	Yes	1
RC0805FR-076K49L	YAGEO	6.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Moisture Resistant	0.60	Yes	1
AC0805FR-076K49L	YAGEO	6.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Moisture Resistant	0.60	Yes	1
CRCW08056K49FKEA	Vishay Dale	6.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	0.50	Yes	1
CRCW08056K49FKEAHP	Vishay Dale	6.49 kΩ	±1%	0.5	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Pulse Withstanding	0.50	Yes	1
ERJ-6ENF6491V	Panasonic Electronic Components	6.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	0.70	Yes	1
RCS08056K49FKEA	Vishay Dale	6.49 kΩ	±1%	0.5	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Pulse Withstanding	0.50	Yes	1
RMCF0805FT6K49	Stackpole Electronics Inc	6.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	0.65	Yes	1

Engineering Selection Recommendations

For Direct Replacement (Non-Automotive Applications): RC0805FR-076K49L (YAGEO) is the primary direct equivalent. This part maintains identical electrical specifications and moisture resistant characteristics with Active product status. The 0.60mm seated height is within acceptable PCB assembly tolerances compared to the original 0.66mm.

For Automotive Applications: AC0805FR-076K49L (YAGEO), CRCW08056K49FKEA (Vishay Dale), ERJ-6ENF6491V (Panasonic), and RMCF0805FT6K49 (Stackpole) are qualified substitutes with AEC-Q200 automotive certification. All maintain the 0.125W power rating and identical electrical parameters. Selection among these options depends on supply availability and preferred manufacturer qualification status.

For Thermally Demanding Applications: CRCW08056K49FKEAHP (Vishay Dale) and RCS08056K49FKEA (Vishay Dale) provide 0.5W power rating with pulse withstanding capability in the same 0805 package footprint. These parts are suitable for applications where the original 0.125W rating requires thermal margin or where pulse stress conditions exist. Both include AEC-Q200 automotive qualification.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and -55°C to 155°C operating temperature range, ensuring compatibility with existing design requirements and regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can RC0805FR-076K49L be used as a direct replacement for RC2012F6491CS? A: Yes. RC0805FR-076K49L matches all critical electrical parameters: 6.49 kOhms resistance, ±1% tolerance, 0.125W power rating, 0805 package, ±100ppm/°C temperature coefficient, and ROHS3 compliance. The 0.06mm difference in seated height (0.60mm vs 0.66mm) is within standard PCB assembly tolerances.

Q: What is the difference between the standard and AEC-Q200 qualified parts? A: AEC-Q200 qualified parts (AC0805FR-076K49L, CRCW08056K49FKEA, ERJ-6ENF6491V, RMCF0805FT6K49) include automotive-grade reliability testing and qualification. These parts are required for automotive applications but are functionally equivalent to non-automotive versions in all electrical and mechanical parameters.

Q: Can I use CRCW08056K49FKEAHP (0.5W) instead of the original 0.125W part? A: Yes, for applications where thermal margin is beneficial. The 0.5W rating provides additional power dissipation capability in the same 0805 footprint. However, this substitution is only appropriate if the circuit design permits the higher power rating without affecting performance or thermal management.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original RC2012F6491CS specifications.

Q: What is the significance of the height differences shown in the parameter table? A: Height variations (0.50mm to 0.70mm) reflect different manufacturer construction methods but do not affect electrical performance. All parts fit within standard 0805 package specifications. Height differences are relevant only for PCB assembly equipment calibration and clearance verification in space-constrained designs.

Q: Which substitute part has the highest inventory availability? A: RMCF0805FT6K49 (Stackpole Electronics Inc) shows 53,419 pieces in stock, followed by RC0805FR-076K49L (YAGEO) with 99,104 pieces. Both are suitable for high-volume procurement requirements.

Q: Can substitute parts be mixed in the same production batch? A: Yes, provided all parts meet the circuit design specifications. However, manufacturing best practices recommend using a single part number per design revision to maintain traceability and simplify quality control documentation.

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