RC1608F1050CS Equivalent & Substitute Parts

Part Overview

The RC1608F1050CS is a 105 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, package dimensions, and compliance certifications to enable direct board-level replacement or design flexibility.

Key Parameters

Parameter	Value
Resistance	105 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 ~ 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the RC1608F1050CS are classified into three categories based on substitution relationship type and application suitability:

Direct Manufacturer Equivalents (Interchangeable without design modification):

CR0603-FX-1050ELF (Bourns Inc.)
RC0603FR-07105RL (YAGEO)

These parts match all critical electrical parameters: 105 Ohms resistance, ±1% tolerance, 0.1W power rating, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. Package dimensions are identical at 0603 (1608 Metric). Both maintain moisture-resistant thick film construction with MSL 1 rating and RoHS3 compliance. These substitutes are suitable for direct PCB replacement in existing designs.

Upgrade Classification (Discontinued but electrically equivalent):

MCR03ERTF1050 (Rohm Semiconductor)

This part carries identical electrical specifications and package format but is marked as Discontinued at DiGi Electronics. It maintains all compliance certifications and operating parameters. Selection of this part requires verification of long-term availability and supply chain continuity.

Similar Parts with Enhanced Ratings (Automotive-grade alternatives):

CRCW0603105RFKEA (Vishay Dale)
ERJ-3EKF1050V (Panasonic Electronic Components)
RMCF0603FT105R (Stackpole Electronics Inc)

These parts meet all electrical and package specifications while adding Automotive AEC-Q200 qualification. Dimensional tolerances show minor variations: CRCW0603105RFKEA measures 0.061" L x 0.033" W (1.55mm x 0.85mm) with 0.020" max height; ERJ-3EKF1050V and RMCF0603FT105R maintain standard 0603 dimensions. These automotive-grade alternatives are suitable for applications requiring enhanced reliability and temperature cycling performance.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff	Op Temp Range	Package	Features	Product Status	RoHS3	MSL
RC1608F1050CS	Samsung Electro-Mechanics	105 Ω	±1%	0.1	±100ppm/°C	-55°C ~ 155°C	0603	Moisture Resistant	Active	Yes	1
CR0603-FX-1050ELF	Bourns Inc.	105 Ω	±1%	0.1	±100ppm/°C	-55°C ~ 155°C	0603	Moisture Resistant	Active	Yes	1
RC0603FR-07105RL	YAGEO	105 Ω	±1%	0.1	±100ppm/°C	-55°C ~ 155°C	0603	Moisture Resistant	Active	Yes	1
MCR03ERTF1050	Rohm Semiconductor	105 Ω	±1%	0.1	±100ppm/°C	-55°C ~ 155°C	0603	Thick Film	Discontinued	Yes	1
CRCW0603105RFKEA	Vishay Dale	105 Ω	±1%	0.1	±100ppm/°C	-55°C ~ 155°C	0603	Automotive AEC-Q200	Active	Yes	1
ERJ-3EKF1050V	Panasonic Electronic Components	105 Ω	±1%	0.1	±100ppm/°C	-55°C ~ 155°C	0603	Automotive AEC-Q200	Active	Yes	1
RMCF0603FT105R	Stackpole Electronics Inc	105 Ω	±1%	0.1	±100ppm/°C	-55°C ~ 155°C	0603	Automotive AEC-Q200	Active	Yes	1

Engineering Selection Recommendations

For Direct Replacement in Active Production: CR0603-FX-1050ELF (Bourns Inc.) and RC0603FR-07105RL (YAGEO) are recommended as primary substitutes. Both maintain Active product status with full RoHS3 compliance and identical electrical specifications. CR0603-FX-1050ELF offers highest inventory availability (70,742 pcs). RC0603FR-07105RL provides alternative sourcing with 1,500 pcs in stock.

For Automotive and High-Reliability Applications: RMCF0603FT105R (Stackpole Electronics Inc), ERJ-3EKF1050V (Panasonic Electronic Components), and CRCW0603105RFKEA (Vishay Dale) are suitable alternatives. All three carry AEC-Q200 automotive qualification with Active product status. RMCF0603FT105R provides maximum inventory depth (222,601 pcs) and is recommended for high-volume automotive applications. ERJ-3EKF1050V and CRCW0603105RFKEA offer alternative automotive-qualified sources with 44,321 pcs and 53,545 pcs respectively.

For Legacy Design Support: MCR03ERTF1050 (Rohm Semiconductor) is electrically equivalent but carries Discontinued status at DiGi Electronics. This part should be selected only when existing inventory is available and long-term supply is not required. Use of this part in new designs is not recommended.

Frequently Asked Questions (FAQ)

Q: Can CR0603-FX-1050ELF be used as a direct replacement for RC1608F1050CS without PCB modification?

A: Yes. Both parts share identical electrical specifications (105 Ω ±1%, 0.1W, ±100ppm/°C), package format (0603/1608 Metric), and compliance certifications (RoHS3, MSL 1). No design changes are required for direct substitution.

Q: What is the difference between the standard industrial-grade parts and the automotive-grade alternatives?

A: Standard parts (CR0603-FX-1050ELF, RC0603FR-07105RL) meet general industrial specifications. Automotive-grade parts (RMCF0603FT105R, ERJ-3EKF1050V, CRCW0603105RFKEA) carry AEC-Q200 qualification, indicating enhanced reliability testing and temperature cycling performance. Electrical parameters remain identical. Automotive-grade parts are suitable for automotive, industrial control, and high-reliability applications.

Q: Are there dimensional differences between substitute parts?

A: Most parts maintain standard 0603 dimensions (0.063" L x 0.031" W / 1.60mm x 0.80mm). CRCW0603105RFKEA shows minor dimensional variation (0.061" L x 0.033" W / 1.55mm x 0.85mm) with reduced height (0.020" vs 0.022" max). These variations remain within 0603 package tolerance and do not affect PCB footprint compatibility.

Q: Why is MCR03ERTF1050 marked as Discontinued?

A: MCR03ERTF1050 is discontinued at DiGi Electronics but remains electrically equivalent. Discontinuation reflects supplier availability decisions rather than technical obsolescence. This part should be used only when existing inventory is available and supply chain continuity is not critical.

Q: Which substitute offers the best inventory availability?

A: RMCF0603FT105R (Stackpole Electronics Inc) provides maximum inventory with 222,601 pcs in stock. This part combines high availability with automotive AEC-Q200 qualification, making it suitable for both standard and automotive applications requiring immediate delivery.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification. All parts are also REACH unaffected and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original RC1608F1050CS specifications.

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