RC1608F4990CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F4990CS is a 499 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0603 (1608 Metric) package format with 0.1W power rating. This component is classified as Active product status with moisture-resistant construction and unlimited moisture sensitivity level (MSL 1). The part is ROHS3 compliant and REACH unaffected, suitable for general industrial and consumer electronics applications.

Equivalent and substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain optimization is required, or when design flexibility across multiple qualified sources is needed while maintaining identical electrical and mechanical performance specifications.

Key Parameters

Parameter	Specification
Resistance Value	499 Ohms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to +155°C
Physical Dimensions	0.063" L x 0.031" W (1.60mm x 0.80mm)
Height (Seated Max)	0.022" (0.55mm)
Terminations	2
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RC1608F4990CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 499 Ohms
Tolerance: ±1%
Power rating: 0.1W (1/10W)
Package format: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to +155°C
Physical dimensions: 0.063" L x 0.031" W (1.60mm x 0.80mm)
Height seated maximum: 0.022" (0.55mm)
Number of terminations: 2
RoHS compliance: ROHS3 Compliant
MSL rating: 1 (Unlimited)

All substitute parts listed below meet these mandatory parameters. Substitute parts are grouped into two categories: Direct Equivalents (identical specifications and packaging) and Similar Parts (identical electrical and mechanical specifications with additional certifications or packaging variations).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Composition	Temp Coeff	Op Temp Range	Dimensions	Height Max	RoHS	MSL	Product Status	Packaging Type
RC1608F4990CS	Samsung Electro-Mechanics	499Ω	±1%	0.1W	0603	Thick Film	±100ppm/°C	-55°C to +155°C	1.60mm x 0.80mm	0.55mm	ROHS3	1	Active	Tape & Reel
CR0603-FX-4990ELF	Bourns Inc.	499Ω	±1%	0.1W	0603	Thick Film	±100ppm/°C	-55°C to +155°C	1.60mm x 0.80mm	0.55mm	ROHS3	1	Active	Tape & Reel
MCR03ERTF4990	Rohm Semiconductor	499Ω	±1%	0.1W	0603	Thick Film	±100ppm/°C	-55°C to +155°C	1.60mm x 0.80mm	0.55mm	ROHS3	1	Discontinued	Cut Tape
RC0603FR-07499RL	YAGEO	499Ω	±1%	0.1W	0603	Thick Film	±100ppm/°C	-55°C to +155°C	1.60mm x 0.80mm	0.55mm	ROHS3	1	Active	Cut Tape
AC0603FR-07499RL	YAGEO	499Ω	±1%	0.1W	0603	Thick Film	±100ppm/°C	-55°C to +155°C	1.60mm x 0.80mm	0.55mm	ROHS3	1	Active	Tape & Reel
ERJ-3EKF4990V	Panasonic Electronic Components	499Ω	±1%	0.1W	0603	Thick Film	±100ppm/°C	-55°C to +155°C	1.60mm x 0.80mm	0.55mm	ROHS3	1	Active	Cut Tape
RMCF0603FT499R	Stackpole Electronics Inc	499Ω	±1%	0.1W	0603	Thick Film	±100ppm/°C	-55°C to +155°C	1.55mm x 0.80mm	0.55mm	ROHS3	1	Active	Tape & Reel

Engineering Selection Recommendations

Direct Equivalents (Preferred for Drop-In Replacement):

CR0603-FX-4990ELF (Bourns Inc.) and RC0603FR-07499RL (YAGEO) are direct functional equivalents with Active product status and full compliance to ROHS3 and REACH requirements. Both parts maintain identical electrical specifications and 0603 package geometry. CR0603-FX-4990ELF is supplied in Tape & Reel packaging matching the original part format. RC0603FR-07499RL is supplied in Cut Tape format with higher inventory availability (5100 units).

Active Status Parts with Additional Certifications:

AC0603FR-07499RL (YAGEO) and ERJ-3EKF4990V (Panasonic) include AEC-Q200 automotive qualification in addition to standard specifications. These parts are suitable for applications requiring automotive-grade reliability. RMCF0603FT499R (Stackpole Electronics) also carries AEC-Q200 certification with Tape & Reel packaging. All three maintain identical electrical and thermal performance to the primary part.

Discontinued Status:

MCR03ERTF4990 (Rohm Semiconductor) is marked as Discontinued at DiGi Electronics. While electrically and mechanically equivalent, this part should not be selected for new designs or long-term supply requirements.

Packaging Considerations:

Tape & Reel packaging (CR0603-FX-4990ELF, AC0603FR-07499RL, RMCF0603FT499R) is suitable for automated assembly processes. Cut Tape packaging (RC0603FR-07499RL, ERJ-3EKF4990V, MCR03ERTF4990) is appropriate for manual assembly or lower-volume applications.

Frequently Asked Questions (FAQ)

Q: Can CR0603-FX-4990ELF be used as a direct replacement for RC1608F4990CS?

A: Yes. CR0603-FX-4990ELF meets all mandatory electrical and mechanical parameters: 499 Ohm resistance, ±1% tolerance, 0.1W power rating, 0603 package, ±100ppm/°C temperature coefficient, -55°C to +155°C operating range, identical physical dimensions, ROHS3 compliance, and MSL 1 rating. The part is Active status and supplied in Tape & Reel format.

Q: What is the difference between RC0603FR-07499RL and AC0603FR-07499RL?

A: Both parts are manufactured by YAGEO with identical electrical specifications (499Ω, ±1%, 0.1W, 0603 package). AC0603FR-07499RL includes AEC-Q200 automotive qualification and moisture-resistant features. RC0603FR-07499RL is the standard industrial version. Selection depends on application requirements for automotive-grade reliability.

Q: Why is MCR03ERTF4990 listed if it is discontinued?

A: MCR03ERTF4990 is included for reference purposes to document historical equivalence and support legacy design documentation. For new designs or replenishment orders, Active status alternatives (CR0603-FX-4990ELF, RC0603FR-07499RL, AC0603FR-07499RL, ERJ-3EKF4990V, RMCF0603FT499R) should be selected.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, matching the primary part RC1608F4990CS.

Q: What is the significance of MSL 1 rating?

A: MSL 1 (Moisture Sensitivity Level 1) indicates Unlimited shelf life without moisture-controlled storage requirements. All listed parts maintain MSL 1 rating, eliminating moisture management considerations during inventory storage and handling.

Q: Can parts with AEC-Q200 certification be used in non-automotive applications?

A: Yes. AEC-Q200 certification represents a superset of standard industrial specifications. Parts such as AC0603FR-07499RL, ERJ-3EKF4990V, and RMCF0603FT499R with AEC-Q200 qualification are fully compatible with standard industrial and consumer applications while providing enhanced reliability margins.

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

A: Tape & Reel packaging supplies components on continuous carrier tape wound on reels, optimized for automated pick-and-place assembly equipment. Cut Tape packaging supplies components on cut segments of carrier tape, suitable for manual assembly or lower-volume production. Electrical and mechanical specifications are identical; packaging selection depends on assembly process requirements.

Q: Is there a dimensional difference between RMCF0603FT499R and other 0603 parts?

A: RMCF0603FT499R has a length specification of 0.061" (1.55mm) compared to 0.063" (1.60mm) for other parts. This 0.05mm difference is within standard 0603 package tolerance and does not affect PCB footprint compatibility or assembly process.

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