RC1608F181CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F181CS is a 180 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, making it suitable for industrial and commercial applications. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental ratings to ensure direct circuit board compatibility.

Key Parameters

Parameter	Specification
Resistance Value	180 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
Physical Dimensions	0.063" L x 0.031" W (1.60mm x 0.80mm)
Height - Seated (Max)	0.022" (0.55mm)
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the RC1608F181CS are classified into three categories based on substitution relationship type and feature alignment:

Direct Substitutes maintain identical electrical and mechanical specifications with equivalent performance characteristics:

CR0603-FX-1800ELF (Bourns Inc.)
CRG0603F180R (TE Connectivity Passive Product)
RC0603FR-07180RL (YAGEO)

Upgrade Substitutes provide enhanced features while maintaining full electrical and mechanical compatibility:

KTR03EZPF1800 (Rohm Semiconductor) - Automotive AEC-Q200 rated, high voltage capable

Similar Substitutes offer equivalent base specifications with additional certifications or environmental features:

AC0603FR-07180RL (YAGEO) - Automotive AEC-Q200, moisture resistant
AF0603FR-07180RL (YAGEO) - Anti-sulfur, automotive AEC-Q200
CRCW0603180RFKEA (Vishay Dale) - Automotive AEC-Q200
ERJ-3EKF1800V (Panasonic Electronic Components) - Automotive AEC-Q200
RMCF0603FT180R (Stackpole Electronics Inc) - Automotive AEC-Q200

All substitute parts share the following critical parameters with the main part:

Resistance: 180 Ohms
Tolerance: ±1%
Power Rating: 0.1W
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature Coefficient: ±100ppm/°C
Operating Temperature: -55°C to 155°C
Terminations: 2
RoHS3 Compliance
MSL 1 Rating

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Features	Certifications	RoHS	MSL
RC1608F181CS	Samsung Electro-Mechanics	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Moisture Resistant	None Listed	ROHS3	1
CR0603-FX-1800ELF	Bourns Inc.	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Moisture Resistant	None Listed	ROHS3	1
CRG0603F180R	TE Connectivity Passive Product	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	None Listed	None Listed	ROHS3	1
RC0603FR-07180RL	YAGEO	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Moisture Resistant	None Listed	ROHS3	1
KTR03EZPF1800	Rohm Semiconductor	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200, High Voltage	AEC-Q200	ROHS3	1
AC0603FR-07180RL	YAGEO	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200, Moisture Resistant	AEC-Q200	ROHS3	1
AF0603FR-07180RL	YAGEO	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Anti-Sulfur, Automotive AEC-Q200	AEC-Q200	ROHS3	1
CRCW0603180RFKEA	Vishay Dale	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	AEC-Q200	ROHS3	1
ERJ-3EKF1800V	Panasonic Electronic Components	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	AEC-Q200	ROHS3	1
RMCF0603FT180R	Stackpole Electronics Inc	180Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	AEC-Q200	ROHS3	1

Engineering Selection Recommendations

For Direct Replacement in Standard Applications: CR0603-FX-1800ELF (Bourns Inc.), CRG0603F180R (TE Connectivity Passive Product), and RC0603FR-07180RL (YAGEO) provide equivalent performance to the RC1608F181CS with identical electrical specifications and package dimensions. These parts maintain the same moisture-resistant characteristics and RoHS3 compliance required for general industrial use.

For Automotive and High-Reliability Applications: KTR03EZPF1800 (Rohm Semiconductor), AC0603FR-07180RL (YAGEO), AF0603FR-07180RL (YAGEO), CRCW0603180RFKEA (Vishay Dale), ERJ-3EKF1800V (Panasonic Electronic Components), and RMCF0603FT180R (Stackpole Electronics Inc) are all AEC-Q200 certified automotive-grade resistors. These parts are suitable for applications requiring automotive qualification standards and enhanced environmental performance. The AF0603FR-07180RL variant includes anti-sulfur protection for corrosive environments.

Inventory and Availability Considerations: RMCF0603FT180R (Stackpole Electronics Inc) maintains the highest inventory level at 200,885 pieces. CRCW0603180RFKEA (Vishay Dale) provides 138,226 pieces in stock. ERJ-3EKF1800V (Panasonic Electronic Components) offers 103,696 pieces. These high-inventory options support volume production requirements and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RC1608F181CS with any of the listed equivalent parts without circuit redesign?

A: Yes. All listed substitute parts share identical electrical specifications (180Ω ±1%, 0.1W), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and 0603 package dimensions. Direct substitution is electrically and mechanically compatible without circuit modification.

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

A: Direct substitutes (CR0603-FX-1800ELF, CRG0603F180R, RC0603FR-07180RL) provide equivalent performance for standard industrial applications. Automotive-grade substitutes carry AEC-Q200 certification, indicating compliance with automotive reliability and environmental stress testing standards. Use automotive-grade parts only when AEC-Q200 qualification is specified in design requirements.

Q: Are there dimensional differences between substitute parts?

A: Most substitute parts maintain the standard 0603 package dimensions of 0.063" L x 0.031" W (1.60mm x 0.80mm) with 0.022" (0.55mm) maximum seated height. CRCW0603180RFKEA and RMCF0603FT180R have minor dimensional variations (0.061" L x 0.033" W and 0.061" L x 0.031" W respectively) but remain within 0603 package classification and are PCB-compatible.

Q: Which substitute part should I select for moisture-sensitive applications?

A: RC0603FR-07180RL (YAGEO), CR0603-FX-1800ELF (Bourns Inc.), and AC0603FR-07180RL (YAGEO) are explicitly rated as moisture-resistant. All listed parts maintain MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

Q: Is RoHS3 compliance maintained across all substitute parts?

A: Yes. All substitute parts listed are RoHS3 compliant, matching the compliance status of the RC1608F181CS. REACH status is either REACH Unaffected or Vendor Undefined across all parts, maintaining regulatory compatibility.

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

A: The RC1608F181CS is supplied in Tape & Reel (TR) format. Direct substitutes CR0603-FX-1800ELF, CRG0603F180R, and most automotive-grade variants are also available in Tape & Reel. RC0603FR-07180RL (YAGEO) is available in Cut Tape (CT) & Digi-Reel® format. Confirm packaging requirements with your procurement specification before ordering.

Q: Can I use AF0603FR-07180RL in place of RC1608F181CS for corrosive environments?

A: AF0603FR-07180RL includes anti-sulfur protection in addition to standard moisture resistance and AEC-Q200 certification. This variant is suitable for environments with sulfur-containing contaminants. However, anti-sulfur protection is not required for standard applications. Select this variant only when corrosive environment protection is specified.

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