RC1608F4992CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F4992CS is a 49.9 kOhms ±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 ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). The RC1608F4992CS serves applications requiring precision resistive elements in compact surface-mount form factors. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental ratings to ensure direct functional interchangeability in circuit designs.

Key Parameters

Parameter	Value
Resistance	49.9 kOhms
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 ~ 155°C
Size / Dimension	0.063" L x 0.031" W (1.60mm x 0.80mm)
Height - Seated (Max)	0.022" (0.55mm)
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the RC1608F4992CS are classified into two categories based on substitution relationship type and feature alignment:

Direct Manufacturer Substitutes maintain identical electrical and mechanical specifications with no additional features or certifications:

CR0603-FX-4992ELF (Bourns Inc.)
CRG0603F49K9 (TE Connectivity Passive Product)
RC0603FR-0749K9L (YAGEO)

Similar Parts with Enhanced Features meet all core electrical and mechanical requirements while incorporating additional certifications or environmental protections:

AC0603FR-0749K9L (YAGEO) — includes Automotive AEC-Q200 certification
AF0603FR-0749K9L (YAGEO) — includes Anti-Sulfur and Automotive AEC-Q200 certification
ERJ-3EKF4992V (Panasonic Electronic Components) — includes Automotive AEC-Q200 certification
RMCF0603FG49K9 (Stackpole Electronics Inc) — includes Automotive AEC-Q200 certification
RMCF0603FT49K9 (Stackpole Electronics Inc) — includes Automotive AEC-Q200 certification

Substitution eligibility is determined by the following mandatory parameters:

Resistance value: 49.9 kOhms
Tolerance: ±1%
Power rating: 0.1W (1/10W)
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS compliance: ROHS3 Compliant
MSL rating: 1 (Unlimited)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Size (mm)	Height Max (mm)	RoHS	MSL	Features
RC1608F4992CS	Samsung Electro-Mechanics	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.60 x 0.80	0.55	ROHS3	1	Moisture Resistant
CR0603-FX-4992ELF	Bourns Inc.	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.60 x 0.80	0.55	ROHS3	1	Moisture Resistant
CRG0603F49K9	TE Connectivity Passive Product	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.60 x 0.80	0.55	ROHS3	1	None
RC0603FR-0749K9L	YAGEO	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.60 x 0.80	0.55	ROHS3	1	Moisture Resistant
AC0603FR-0749K9L	YAGEO	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.60 x 0.80	0.55	ROHS3	1	Automotive AEC-Q200, Moisture Resistant
AF0603FR-0749K9L	YAGEO	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.60 x 0.80	0.55	ROHS3	1	Anti-Sulfur, Automotive AEC-Q200
ERJ-3EKF4992V	Panasonic Electronic Components	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.60 x 0.80	0.55	ROHS3	1	Automotive AEC-Q200
RMCF0603FG49K9	Stackpole Electronics Inc	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.55 x 0.80	0.55	ROHS3	1	Automotive AEC-Q200
RMCF0603FT49K9	Stackpole Electronics Inc	49.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1.55 x 0.80	0.55	ROHS3	1	Automotive AEC-Q200

Engineering Selection Recommendations

For Standard Industrial Applications: CR0603-FX-4992ELF (Bourns Inc.) and RC0603FR-0749K9L (YAGEO) provide direct functional equivalence to the RC1608F4992CS with identical electrical specifications, mechanical dimensions, and moisture resistance features. Both maintain ROHS3 compliance and MSL 1 rating. Selection between these options depends on supplier availability and procurement lead times.

For Automotive Applications: AC0603FR-0749K9L, AF0603FR-0749K9L (YAGEO), ERJ-3EKF4992V (Panasonic), RMCF0603FG49K9, and RMCF0603FT49K9 (Stackpole) incorporate Automotive AEC-Q200 certification. AF0603FR-0749K9L additionally includes anti-sulfur protection. These parts are suitable for automotive circuit designs requiring qualified component status. All maintain identical core electrical and thermal specifications as the primary part.

For General-Purpose Substitution: CRG0603F49K9 (TE Connectivity) meets all mandatory electrical and mechanical parameters without additional environmental features. This option is appropriate for applications where automotive qualification is not required and standard industrial-grade performance is sufficient.

Packaging Considerations: CR0603-FX-4992ELF, RC0603FR-0749K9L, AC0603FR-0749K9L, and AF0603FR-0749K9L are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. RMCF0603FG49K9 and RMCF0603FT49K9 are available in TR and CT & Digi-Reel® formats respectively. CRG0603F49K9 is supplied in TR format. Verify packaging format compatibility with assembly equipment specifications before final selection.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RC1608F4992CS with any of the listed equivalent parts without circuit redesign?

A: Yes. All listed substitute parts maintain identical resistance value (49.9 kOhms), tolerance (±1%), power rating (0.1W), package format (0603), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C). Direct substitution is electrically and mechanically compatible. Verify packaging format (Tape & Reel vs. Cut Tape) matches your assembly process requirements.

Q: What is the difference between direct substitutes and similar parts with enhanced features?

A: Direct substitutes (CR0603-FX-4992ELF, CRG0603F49K9, RC0603FR-0749K9L) provide identical specifications to the RC1608F4992CS. Similar parts with enhanced features (AC0603FR-0749K9L, AF0603FR-0749K9L, ERJ-3EKF4992V, RMCF0603FG49K9, RMCF0603FT49K9) include Automotive AEC-Q200 certification, making them suitable for automotive applications. The core electrical and mechanical performance remains equivalent.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the environmental compliance requirement of the RC1608F4992CS.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates unlimited shelf life without moisture bake-out requirements. All substitute parts carry MSL 1 rating, ensuring equivalent moisture handling and storage conditions.

Q: Which substitute part should I select for automotive applications?

A: For automotive applications, select from parts carrying Automotive AEC-Q200 certification: AC0603FR-0749K9L, AF0603FR-0749K9L, ERJ-3EKF4992V, RMCF0603FG49K9, or RMCF0603FT49K9. AF0603FR-0749K9L provides additional anti-sulfur protection for enhanced environmental resistance.

Q: Are there dimensional differences between substitute parts?

A: Most substitute parts maintain 1.60mm x 0.80mm dimensions. RMCF0603FG49K9 and RMCF0603FT49K9 have slightly reduced length (1.55mm x 0.80mm). All parts maintain identical 0.55mm maximum seated height. These minor dimensional variations remain within 0603 package specification tolerances and do not affect PCB layout compatibility.

Q: What packaging formats are available for these substitute parts?

A: Substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. Verify your assembly equipment compatibility before selection. TR format is standard for high-volume automated assembly; CT & Digi-Reel® format is suitable for lower-volume or manual assembly processes.

Q: Can I mix different substitute parts in the same production batch?

A: Yes. All substitute parts meet identical electrical and mechanical specifications. Mixing different manufacturers in the same batch is permissible from a functional standpoint. However, verify with your quality assurance procedures regarding supplier qualification and traceability requirements for your specific application.

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