RC1608F2491CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F2491CS is a 2.49 kOhms ±1% 0.1W thick film chip resistor manufactured by Samsung Electro-Mechanics in 0603 (1608 Metric) package format. This component is classified as Active product status with 1,037 pieces currently in stock. The RC1608F2491CS serves as a standard general-purpose resistor for applications requiring moisture-resistant thick film construction and industrial temperature range operation. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and compliance certifications to ensure direct functional interchangeability in circuit designs.

Key Parameters

Parameter	Value
Resistance	2.49 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
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the RC1608F2491CS are classified into two categories based on substitution compatibility:

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

CR0603-FX-2491ELF (Bourns Inc.)
RC0603FR-072K49L (YAGEO)

Similar Substitutes maintain all core electrical and mechanical parameters but include additional automotive or environmental certifications:

AC0603FR-072K49L (YAGEO) — includes AEC-Q200 automotive qualification
AF0603FR-072K49L (YAGEO) — includes AEC-Q200 and anti-sulfur features
CRCW06032K49FKEA (Vishay Dale) — includes AEC-Q200 automotive qualification
CRCW06032K49FKEB (Vishay Dale) — includes AEC-Q200 automotive qualification
CRCW06032K49FKTA (Vishay Dale) — includes AEC-Q200 but RoHS non-compliant
ERJ-3EKF2491V (Panasonic Electronic Components) — includes AEC-Q200 automotive qualification
RMCF0603FT2K49 (Stackpole Electronics Inc) — includes AEC-Q200 automotive qualification

Substitution eligibility is determined by the following parameters:

Resistance value: 2.49 kOhms
Tolerance: ±1%
Power rating: 0.1W
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature: -55°C ~ 155°C
MSL rating: 1 (Unlimited)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	RoHS Status	AEC-Q200	Inventory
RC1608F2491CS	Samsung Electro-Mechanics	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	No	1,037
CR0603-FX-2491ELF	Bourns Inc.	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	No	70,018
RC0603FR-072K49L	YAGEO	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	No	500,200
AC0603FR-072K49L	YAGEO	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	Yes	157,882
AF0603FR-072K49L	YAGEO	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	Yes	6,109
CRCW06032K49FKEA	Vishay Dale	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	Yes	12,833
CRCW06032K49FKEB	Vishay Dale	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	Yes	59,337
CRCW06032K49FKTA	Vishay Dale	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	Non-compliant	Yes	80,565
ERJ-3EKF2491V	Panasonic Electronic Components	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	Yes	37,933
RMCF0603FT2K49	Stackpole Electronics Inc	2.49 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	ROHS3	Yes	215,558

Engineering Selection Recommendations

For General Industrial Applications (Non-Automotive): Select CR0603-FX-2491ELF (Bourns Inc.) or RC0603FR-072K49L (YAGEO) as direct substitutes. Both parts maintain identical electrical specifications and ROHS3 compliance with the RC1608F2491CS. RC0603FR-072K49L offers the highest inventory availability at 500,200 units.

For Automotive Applications Requiring AEC-Q200 Qualification: Select from CRCW06032K49FKEA, CRCW06032K49FKEB, ERJ-3EKF2491V, or RMCF0603FT2K49. All four parts carry AEC-Q200 automotive qualification and ROHS3 compliance. RMCF0603FT2K49 provides the largest inventory stock at 215,558 units.

For Automotive Applications with Anti-Sulfur Requirements: Select AF0603FR-072K49L (YAGEO). This part includes both AEC-Q200 automotive qualification and anti-sulfur features while maintaining ROHS3 compliance. Inventory availability is 6,109 units.

Parts to Avoid: CRCW06032K49FKTA is RoHS non-compliant and REACH-affected. This part is not suitable for applications requiring regulatory compliance with current environmental standards.

Product Status Considerations: CRCW06032K49FKEB is listed as discontinued at DiGi Electronics. While 59,337 units remain in inventory, long-term availability cannot be assured. For new designs, select from active product status alternatives.

Frequently Asked Questions (FAQ)

Q: Can I use an AEC-Q200 qualified part as a substitute for the RC1608F2491CS in a non-automotive application?

A: Yes. AEC-Q200 qualified parts such as AC0603FR-072K49L, CRCW06032K49FKEA, ERJ-3EKF2491V, and RMCF0603FT2K49 meet or exceed the electrical and mechanical specifications of the RC1608F2491CS. The additional automotive qualification does not restrict use in general industrial applications.

Q: What is the difference between direct substitutes and similar substitutes?

A: Direct substitutes (CR0603-FX-2491ELF and RC0603FR-072K49L) share identical specifications with the RC1608F2491CS, including no automotive certification. Similar substitutes include additional certifications such as AEC-Q200 automotive qualification or anti-sulfur features, but maintain all core electrical and mechanical parameters.

Q: Are there any dimensional differences between substitute parts?

A: Minor dimensional variations exist within the 0603 package specification. The RC1608F2491CS, CR0603-FX-2491ELF, and ERJ-3EKF2491V specify 0.063" L x 0.031" W (1.60mm x 0.80mm). Vishay Dale parts (CRCW series) specify 0.063" L x 0.033" W (1.60mm x 0.85mm) or 0.061" L x 0.033" W (1.55mm x 0.85mm). Stackpole RMCF0603FT2K49 specifies 0.061" L x 0.031" W (1.55mm x 0.80mm). These variations remain within standard 0603 package tolerances and do not affect PCB layout compatibility.

Q: Which substitute part has the highest inventory availability?

A: RC0603FR-072K49L (YAGEO) offers the highest inventory at 500,200 units, followed by RMCF0603FT2K49 (Stackpole Electronics Inc) at 215,558 units.

Q: Is the RC1608F2491CS suitable for automotive applications?

A: The RC1608F2491CS is not AEC-Q200 qualified. For automotive applications, select from AC0603FR-072K49L, AF0603FR-072K49L, CRCW06032K49FKEA, CRCW06032K49FKEB, CRCW06032K49FKTA, ERJ-3EKF2491V, or RMCF0603FT2K49.

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

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This classification applies to all listed parts and the main RC1608F2491CS component.

Q: Can I substitute CRCW06032K49FKTA in a new design?

A: CRCW06032K49FKTA is RoHS non-compliant and REACH-affected. It is not recommended for new designs requiring regulatory compliance with current environmental standards. Select from ROHS3-compliant alternatives instead.

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