RC1608F3010CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F3010CS is a 301 Ohms ±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 applications requiring standard tolerance resistive elements.

Equivalent and substitute parts are necessary when the primary manufacturer part becomes unavailable, when alternative sourcing improves supply chain resilience, or when application-specific certifications such as automotive AEC-Q200 qualification are required for end-use compatibility.

Key Parameters

Parameter	Value	Substitution Relevance
Resistance Value	301 Ohms	Critical - must match exactly
Tolerance	±1%	Critical - determines circuit accuracy
Power Rating	0.1W (1/10W)	Critical - thermal performance requirement
Package / Case	0603 (1608 Metric)	Critical - PCB footprint compatibility
Composition	Thick Film	Important - electrical characteristics and temperature stability
Temperature Coefficient	±100ppm/°C	Important - temperature stability performance
Operating Temperature Range	-55°C ~ 155°C	Important - environmental operating limits
Moisture Resistance	Yes	Important - reliability in humid environments
RoHS Status	ROHS3 Compliant	Important - regulatory compliance
MSL Rating	1 (Unlimited)	Important - storage and handling requirements

Substitute Part Grouping Explanation

Substitution logic for the RC1608F3010CS is based on strict electrical and mechanical parameter matching. All substitute parts must satisfy the following mandatory criteria:

Electrical Parameters (Non-negotiable):

Resistance: 301 Ohms
Tolerance: ±1%
Power Rating: 0.1W (1/10W)
Temperature Coefficient: ±100ppm/°C
Operating Temperature Range: -55°C ~ 155°C

Mechanical Parameters (Non-negotiable):

Package: 0603 (1608 Metric)
Composition: Thick Film
Terminations: 2

Compliance Parameters (Application-dependent):

RoHS Status: ROHS3 Compliant preferred
MSL Rating: 1 (Unlimited)
REACH Status: REACH Unaffected preferred

Substitute parts are categorized as Direct Equivalents when all electrical, mechanical, and compliance parameters match the main part. Parts with additional certifications (such as automotive AEC-Q200) are categorized as Similar substitutes, as they exceed base requirements but remain functionally compatible within the specified parameter envelope.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Composition	Features	RoHS Status	Product Status
RC1608F3010CS	Samsung Electro-Mechanics	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Moisture Resistant	ROHS3	Active
CR0603-FX-3010ELF	Bourns Inc.	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Moisture Resistant	ROHS3	Active
RC0603FR-07301RL	YAGEO	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Moisture Resistant	ROHS3	Active
AC0603FR-07301RL	YAGEO	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Automotive AEC-Q200, Moisture Resistant	ROHS3	Active
AF0603FR-07301RL	YAGEO	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Anti-Sulfur, Automotive AEC-Q200	ROHS3	Active
CRCW0603301RFKEA	Vishay Dale	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Automotive AEC-Q200	ROHS3	Active
CRCW0603301RFKEB	Vishay Dale	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Automotive AEC-Q200	ROHS3	Discontinued at DiGi Electronics
CRCW0603301RFKTA	Vishay Dale	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Automotive AEC-Q200	RoHS Non-compliant	Active
ERJ-3EKF3010V	Panasonic Electronic Components	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Automotive AEC-Q200	ROHS3	Active
RMCF0603FT301R	Stackpole Electronics Inc	301 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Thick Film	Automotive AEC-Q200	ROHS3	Active

Engineering Selection Recommendations

Direct Equivalent Selection (Preferred for Standard Applications):

CR0603-FX-3010ELF (Bourns Inc.) and RC0603FR-07301RL (YAGEO) are direct functional equivalents to RC1608F3010CS. Both parts match all electrical specifications, mechanical dimensions, and compliance requirements. Selection between these options depends on supply chain availability and inventory levels. CR0603-FX-3010ELF maintains 60,359 units in stock, while RC0603FR-07301RL maintains 97,740 units in stock.

Automotive-Qualified Alternatives (For AEC-Q200 Applications):

AC0603FR-07301RL, AF0603FR-07301RL, CRCW0603301RFKEA, ERJ-3EKF3010V, and RMCF0603FT301R all carry automotive AEC-Q200 certification. These parts are suitable for applications requiring automotive-grade reliability and qualification documentation. AF0603FR-07301RL adds anti-sulfur protection for enhanced environmental resistance. All automotive-qualified options maintain ROHS3 compliance and unlimited MSL rating.

Compliance Considerations:

CRCW0603301RFKTA carries RoHS non-compliant status and REACH Affected designation. This part is not recommended for new designs targeting ROHS3 compliance or REACH-regulated markets.

CRCW0603301RFKEB is discontinued at DiGi Electronics and should not be selected for new production designs requiring long-term supply assurance.

Inventory and Availability:

ERJ-3EKF3010V (Panasonic) offers the highest inventory level at 191,088 units, followed by CRCW0603301RFKEA (Vishay Dale) at 145,282 units. These options provide superior supply chain security for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F3010CS with any 301 Ohm 0603 resistor?

A: No. Substitution requires matching all critical parameters: 301 Ohms resistance, ±1% tolerance, 0.1W power rating, thick film composition, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. Package must be 0603 (1608 Metric) with 2 terminations. Additional features such as moisture resistance and RoHS compliance must also align with application requirements.

Q: What is the difference between direct equivalents and automotive-qualified substitutes?

A: Direct equivalents (CR0603-FX-3010ELF, RC0603FR-07301RL) match all base electrical and mechanical specifications without additional certifications. Automotive-qualified substitutes carry AEC-Q200 certification, indicating compliance with automotive reliability and qualification standards. Automotive parts are suitable for both standard and automotive applications, while standard parts are limited to non-automotive use cases.

Q: Does packaging format affect substitution compatibility?

A: Yes. The 0603 (1608 Metric) package dimension is critical for PCB footprint compatibility. While dimensional variations exist between manufacturers (for example, CRCW series dimensions differ slightly from Samsung and YAGEO specifications), all listed substitutes maintain 0603 package classification and are compatible with standard 0603 PCB footprints. Verify specific dimensional tolerances with component datasheets if tight mechanical constraints exist.

Q: Are all substitute parts ROHS3 compliant?

A: No. CRCW0603301RFKTA is RoHS non-compliant. All other listed substitutes maintain ROHS3 compliance. For applications requiring RoHS3 certification, exclude CRCW0603301RFKTA from selection.

Q: What is MSL 1 (Unlimited) and why does it matter?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture bake-out requirements. All listed parts carry MSL 1 rating, meaning they can be stored indefinitely under normal conditions without special humidity control or pre-soldering baking procedures. This simplifies inventory management and reduces production constraints.

Q: Which substitute offers the best supply chain security?

A: ERJ-3EKF3010V (Panasonic) maintains the highest inventory at 191,088 units, followed by CRCW0603301RFKEA (Vishay Dale) at 145,282 units. Both parts are Active status with ROHS3 compliance and automotive AEC-Q200 certification, providing dual advantages of availability and qualification coverage.

Q: Can I use CRCW0603301RFKEB as a substitute?

A: CRCW0603301RFKEB is discontinued at DiGi Electronics and should not be selected for new production designs. While the part remains electrically compatible, discontinued status creates long-term supply risk and limits future sourcing options.

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