RC1608F4021CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F4021CS is a 4.02 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.1W (1/10W) power dissipation in a 0603 (1608 Metric) surface mount package. This component is classified as Active product status with moisture-resistant construction and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and compliance certifications to ensure direct circuit board compatibility and functional interchangeability.

Key Parameters

Parameter	Specification
Resistance Value	4.02 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 to 155°C
Moisture Resistance	Yes
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the RC1608F4021CS are classified into two categories based on substitution compatibility:

Direct Substitutes share identical electrical and mechanical specifications with no additional features or certifications. These parts maintain the same resistance value (4.02 kOhms), tolerance (±1%), power rating (0.1W), package dimensions (0603), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and moisture-resistant thick film composition. Direct substitutes are suitable for applications where standard industrial-grade components are required.

Similar Substitutes meet all core electrical and mechanical requirements but include additional automotive-grade certifications (AEC-Q200) or enhanced features such as anti-sulfur construction. These parts maintain identical resistance, tolerance, power rating, package, temperature coefficient, and operating temperature specifications. Similar substitutes are appropriate for automotive applications or environments requiring enhanced reliability standards.

The following parameters determine substitution eligibility:

Resistance value: 4.02 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power rating: 0.1W / 1/10W (exact match required)
Package: 0603 (1608 Metric) (exact match required)
Temperature coefficient: ±100ppm/°C (exact match required)
Operating temperature: -55°C to 155°C (exact match required)
Composition: Thick Film (exact match required)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp (°C)	Features	RoHS Status	Product Status
RC1608F4021CS	Samsung Electro-Mechanics	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3 Compliant	Active
CR0603-FX-4021ELF	Bourns Inc.	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3 Compliant	Active
RC0603FR-074K02L	YAGEO	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3 Compliant	Active
AC0603FR-074K02L	YAGEO	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Automotive AEC-Q200, Moisture Resistant	ROHS3 Compliant	Active
AF0603FR-074K02L	YAGEO	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Anti-Sulfur, Automotive AEC-Q200	ROHS3 Compliant	Active
CRCW06034K02FKEA	Vishay Dale	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3 Compliant	Active
CRCW06034K02FKEB	Vishay Dale	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3 Compliant	Discontinued at DiGi Electronics
CRCW06034K02FKTA	Vishay Dale	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Automotive AEC-Q200	RoHS Non-Compliant	Active
ERJ-3EKF4021V	Panasonic Electronic Components	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3 Compliant	Active
RMCF0603FT4K02	Stackpole Electronics Inc	4.02 kΩ	±1%	0.1	0603	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3 Compliant	Active

Engineering Selection Recommendations

For Standard Industrial Applications: CR0603-FX-4021ELF (Bourns Inc.) and RC0603FR-074K02L (YAGEO) are direct functional equivalents to the RC1608F4021CS. Both maintain identical electrical specifications, moisture-resistant thick film construction, ROHS3 compliance, and Active product status. These parts are suitable for general-purpose circuit applications where automotive-grade certification is not required.

For Automotive Applications: AC0603FR-074K02L, AF0603FR-074K02L (YAGEO), CRCW06034K02FKEA (Vishay Dale), ERJ-3EKF4021V (Panasonic), and RMCF0603FT4K02 (Stackpole Electronics) all carry AEC-Q200 automotive qualification. These parts meet automotive reliability standards and are appropriate for vehicle electronics, industrial control systems, and applications requiring enhanced component qualification. AF0603FR-074K02L includes additional anti-sulfur protection for corrosive environments.

Compliance Considerations: CRCW06034K02FKTA (Vishay Dale) is RoHS non-compliant and REACH Affected; this part should be avoided in applications requiring ROHS3 compliance or REACH compliance. CRCW06034K02FKEB (Vishay Dale) is discontinued at DiGi Electronics and should not be selected for new designs requiring long-term supply availability.

All recommended active substitutes maintain identical resistance value, tolerance, power rating, package dimensions, temperature coefficient, and operating temperature range as the original RC1608F4021CS component.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC0603FR-074K02L for RC1608F4021CS in my circuit? A: Yes. RC0603FR-074K02L is a direct functional equivalent manufactured by YAGEO. Both components share identical electrical specifications (4.02 kΩ ±1%, 0.1W), package dimensions (0603), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and moisture-resistant thick film composition. ROHS3 compliance and MSL 1 ratings are identical.

Q: What is the difference between the standard RC0603FR-074K02L and the automotive-grade AC0603FR-074K02L? A: Both parts are manufactured by YAGEO and share identical electrical and mechanical specifications. AC0603FR-074K02L carries AEC-Q200 automotive qualification, indicating compliance with automotive reliability and testing standards. Select AC0603FR-074K02L for automotive applications; use RC0603FR-074K02L for standard industrial applications.

Q: Why should I avoid CRCW06034K02FKTA? A: CRCW06034K02FKTA is RoHS non-compliant and REACH Affected. If your application or regulatory environment requires ROHS3 compliance or REACH compliance, this part is unsuitable. Select CRCW06034K02FKEA instead, which maintains identical specifications with full ROHS3 compliance.

Q: Are there packaging differences between substitute parts? A: Most substitutes are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® packaging. Verify packaging format compatibility with your assembly process. Physical dimensions vary slightly (e.g., CRCW series: 0.061" L x 0.033" W versus Samsung RC series: 0.063" L x 0.031" W), but all fit within 0603 package specifications and are compatible with standard 0603 footprints.

Q: Can I use RMCF0603FT4K02 in place of RC1608F4021CS? A: Yes. RMCF0603FT4K02 manufactured by Stackpole Electronics is functionally equivalent with AEC-Q200 automotive qualification. Electrical specifications, package, temperature coefficient, and operating temperature are identical. This part is suitable for both standard and automotive applications.

Q: Is AF0603FR-074K02L suitable for harsh environments? A: AF0603FR-074K02L includes anti-sulfur protection in addition to standard moisture resistance. This feature provides enhanced protection in corrosive or high-sulfur environments. All other electrical and mechanical specifications remain identical to the base RC1608F4021CS component.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity? A: MSL 1 indicates the component has unlimited shelf life and does not require special moisture-controlled storage or handling. All substitute parts listed maintain MSL 1 rating, ensuring compatibility with standard warehouse and assembly processes.

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