RC1608F8660CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F8660CS is a 866 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 identified based on matching electrical specifications, mechanical dimensions, and environmental compliance certifications.

Key Parameters

Parameter	Specification
Resistance Value	866 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
Moisture Sensitivity Level	MSL 1 (Unlimited)
RoHS Status	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)

Substitute Part Grouping Explanation

Substitution eligibility for the RC1608F8660CS is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

Resistance value: 866 Ohms (exact match)
Tolerance: ±1% (exact match)
Power rating: 0.1W / 1/10W (exact match)
Temperature coefficient: ±100ppm/°C (exact match)
Operating temperature range: -55°C to +155°C (exact match)

Mechanical Equivalence Requirements:

Package type: 0603 (1608 Metric) (exact match)
Composition: Thick Film (exact match)
Number of terminations: 2 (exact match)
Moisture sensitivity level: MSL 1 (exact match)

Compliance Requirements:

RoHS3 compliance (mandatory)
REACH unaffected status (mandatory)

All substitute parts listed below meet these criteria. Substitute parts are grouped by product status and additional certifications where applicable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	Product Status	Additional Features	Packaging
RC1608F8660CS	Samsung Electro-Mechanics	866 Ω	±1%	0.1	0603	±100ppm/°C	-55 to +155°C	Active	Moisture Resistant	TR
CR0603-FX-8660ELF	Bourns Inc.	866 Ω	±1%	0.1	0603	±100ppm/°C	-55 to +155°C	Active	Moisture Resistant	TR
RC0603FR-07866RL	YAGEO	866 Ω	±1%	0.1	0603	±100ppm/°C	-55 to +155°C	Active	Moisture Resistant	TR
MCR03ERTF8660	Rohm Semiconductor	866 Ω	±1%	0.1	0603	±100ppm/°C	-55 to +155°C	Discontinued at DiGi Electronics	None Listed	CT / Digi-Reel
AC0603FR-07866RL	YAGEO	866 Ω	±1%	0.1	0603	±100ppm/°C	-55 to +155°C	Active	Automotive AEC-Q200, Moisture Resistant	TR
CRCW0603866RFKEA	Vishay Dale	866 Ω	±1%	0.1	0603	±100ppm/°C	-55 to +155°C	Active	Automotive AEC-Q200	TR
ERJ-3EKF8660V	Panasonic Electronic Components	866 Ω	±1%	0.1	0603	±100ppm/°C	-55 to +155°C	Active	Automotive AEC-Q200	TR
RMCF0603FT866R	Stackpole Electronics Inc	866 Ω	±1%	0.1	0603	±100ppm/°C	-55 to +155°C	Active	Automotive AEC-Q200	TR

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents - Active Status):

CR0603-FX-8660ELF (Bourns Inc.) and RC0603FR-07866RL (YAGEO) are direct functional equivalents with Active product status. Both maintain identical electrical and mechanical specifications with moisture-resistant construction. Selection between these and the main part RC1608F8660CS depends on supply chain availability and procurement preferences.

Automotive-Qualified Alternatives (Active Status with AEC-Q200):

AC0603FR-07866RL (YAGEO), CRCW0603866RFKEA (Vishay Dale), ERJ-3EKF8660V (Panasonic), and RMCF0603FT866R (Stackpole Electronics) are all Active products with Automotive AEC-Q200 certification. These parts exceed the compliance requirements of the main part and are suitable for applications requiring automotive-grade reliability. Dimensional variations exist within acceptable tolerances (height range 0.020" to 0.022", length range 0.061" to 0.063").

Discontinued Product (Limited Availability):

MCR03ERTF8660 (Rohm Semiconductor) is discontinued at DiGi Electronics and should be avoided for new designs unless existing inventory is specifically required for legacy system support.

Selection Criteria:

For general industrial applications: CR0603-FX-8660ELF or RC0603FR-07866RL
For automotive or high-reliability applications: AC0603FR-07866RL, CRCW0603866RFKEA, ERJ-3EKF8660V, or RMCF0603FT866R
Verify packaging format compatibility with assembly equipment (Tape & Reel standard for all active alternatives)

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F8660CS with CR0603-FX-8660ELF?

A: Yes. Both parts are electrically and mechanically equivalent with identical resistance (866 Ω), tolerance (±1%), power rating (0.1W), package (0603), temperature coefficient (±100ppm/°C), and operating range (-55°C to +155°C). Both are RoHS3 compliant and MSL 1 rated. Substitution is direct.

Q: What is the difference between the main part and automotive-qualified alternatives?

A: The main part RC1608F8660CS is moisture-resistant general-purpose thick film resistor. Automotive alternatives (AC0603FR-07866RL, CRCW0603866RFKEA, ERJ-3EKF8660V, RMCF0603FT866R) carry AEC-Q200 certification, indicating compliance with automotive reliability and qualification standards. All other electrical and mechanical parameters remain identical. Automotive parts are suitable for general applications but represent higher qualification levels.

Q: Are there dimensional differences between substitute parts?

A: Minor dimensional variations exist within acceptable tolerances. The main part and most substitutes measure 0.063" L × 0.031" W (1.60mm × 0.80mm) with 0.022" maximum seated height. CRCW0603866RFKEA measures 0.061" L × 0.033" W (1.55mm × 0.85mm) with 0.020" maximum height, and RMCF0603FT866R measures 0.061" L × 0.031" W (1.55mm × 0.80mm). These variations are within 0603 package specification tolerances and do not affect PCB layout or assembly compatibility.

Q: Can I use MCR03ERTF8660 as a substitute?

A: MCR03ERTF8660 meets all electrical and mechanical equivalence criteria but is discontinued at DiGi Electronics. Use only if existing inventory is available and required for legacy system maintenance. For new designs, select from active alternatives.

Q: What packaging formats are available for substitutes?

A: All active substitute parts are supplied in Tape & Reel (TR) format, matching the main part packaging. MCR03ERTF8660 is available in Cut Tape (CT) and Digi-Reel format. Verify packaging compatibility with your assembly equipment before procurement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the compliance status of the main part RC1608F8660CS.

Q: Which substitute offers the best availability?

A: RC0603FR-07866RL (YAGEO) shows highest inventory at 241,653 pieces. RMCF0603FT866R (Stackpole) has 131,576 pieces. Both are suitable for high-volume procurement.

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