RC1608F301CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F301CS is a 300 Ohms ±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 characteristics and operates across the temperature range of -55°C to 155°C. The part is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating), mechanical compatibility (package size, termination count, physical dimensions), and environmental ratings (temperature coefficient, operating temperature range, compliance certifications). Alternative sources provide design flexibility, supply chain redundancy, and access to different packaging formats or enhanced feature sets such as automotive qualification.

Key Parameters

Parameter	Value
Resistance	300 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
Number of Terminations	2
Size / Dimension	0.063" L x 0.031" W (1.60mm x 0.80mm)
Height - Seated (Max)	0.022" (0.55mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RC1608F301CS is determined by strict alignment with the following core parameters:

Electrical Specifications: Resistance value must be 300 Ohms with ±1% tolerance. Power rating must be 0.1W (1/10W). Temperature coefficient must be ±100ppm/°C. Operating temperature range must span -55°C to 155°C minimum.

Mechanical Compatibility: Package designation must be 0603 (1608 Metric). Physical dimensions must accommodate 0.063" L x 0.031" W footprint with maximum seated height of 0.022" (0.55mm). Number of terminations must be 2.

Material & Composition: Thick film construction is required.

Compliance & Environmental: ROHS3 compliance and MSL 1 rating are baseline requirements. Additional certifications such as AEC-Q200 automotive qualification represent enhanced feature sets that do not disqualify substitution but indicate upgraded performance characteristics.

Packaging Format: Substitute parts may be supplied in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. Packaging format differences do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Size (mm)	Height Max (mm)	RoHS	MSL	Packaging	Features
RC1608F301CS	Samsung Electro-Mechanics	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.60 x 0.80	0.55	ROHS3	1	Tape & Reel	Moisture Resistant
CR0603-FX-3000ELF	Bourns Inc.	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.60 x 0.80	0.55	ROHS3	1	Tape & Reel	Moisture Resistant
RC0603FR-07300RL	YAGEO	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.60 x 0.80	0.55	ROHS3	1	Cut Tape & Digi-Reel	Moisture Resistant
KTR03EZPF3000	Rohm Semiconductor	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.60 x 0.80	0.55	ROHS3	1	Tape & Reel	Automotive AEC-Q200, High Voltage
AC0603FR-07300RL	YAGEO	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.60 x 0.80	0.55	ROHS3	1	Tape & Reel	Automotive AEC-Q200, Moisture Resistant
CRCW0603300RFKEA	Vishay Dale	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.55 x 0.85	0.50	ROHS3	1	Cut Tape & Digi-Reel	Automotive AEC-Q200
CRCW0603300RFKTA	Vishay Dale	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.60 x 0.85	0.50	RoHS Non-compliant	1	Tape & Reel	Automotive AEC-Q200
ERJ-3EKF3000V	Panasonic Electronic Components	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.60 x 0.80	0.55	ROHS3	1	Cut Tape & Digi-Reel	Automotive AEC-Q200
RMCF0603FT300R	Stackpole Electronics Inc	300 Ω	±1%	0.1	0603	±100ppm/°C	-55~155°C	1.55 x 0.80	0.55	ROHS3	1	Tape & Reel	Automotive AEC-Q200

Engineering Selection Recommendations

Direct Equivalents (Baseline Compliance):

CR0603-FX-3000ELF (Bourns Inc.) and RC0603FR-07300RL (YAGEO) are direct functional equivalents to the RC1608F301CS. Both parts match all core electrical and mechanical parameters, maintain ROHS3 compliance, and provide identical operating characteristics. CR0603-FX-3000ELF is supplied in Tape & Reel format with 45,644 units in stock. RC0603FR-07300RL is supplied in Cut Tape & Digi-Reel® format with 3,300 units in stock. Selection between these options is based on packaging format requirements and inventory availability.

Upgraded Alternatives (Automotive Qualification):

KTR03EZPF3000 (Rohm Semiconductor), AC0603FR-07300RL (YAGEO), CRCW0603300RFKEA (Vishay Dale), ERJ-3EKF3000V (Panasonic Electronic Components), and RMCF0603FT300R (Stackpole Electronics Inc) are qualified to AEC-Q200 automotive standards. These parts maintain all baseline electrical specifications and ROHS3 compliance while providing enhanced reliability certification for automotive applications. KTR03EZPF3000 includes high voltage rating designation. AC0603FR-07300RL and ERJ-3EKF3000V maintain moisture resistant features in addition to automotive qualification. CRCW0603300RFKEA and RMCF0603FT300R exhibit minor dimensional variations within the 0603 package envelope (height 0.50mm vs. 0.55mm, width 0.85mm vs. 0.80mm) that remain compatible with standard PCB layouts.

Compliance Restriction:

CRCW0603300RFKTA (Vishay Dale) is RoHS non-compliant and REACH affected. This part is not suitable for applications requiring ROHS3 compliance and should not be selected as a substitute for the RC1608F301CS in regulated environments.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RC1608F301CS with any of the listed alternatives without circuit redesign?

A: Yes. All listed alternatives except CRCW0603300RFKTA match the core electrical specifications (300 Ohms ±1%, 0.1W, ±100ppm/°C, -55°C to 155°C) and mechanical package (0603 with 2 terminations). Physical dimensions are within standard 0603 tolerances. No circuit redesign is required.

Q: What is the difference between direct equivalents and upgraded alternatives?

A: Direct equivalents (CR0603-FX-3000ELF, RC0603FR-07300RL) provide identical baseline specifications to the RC1608F301CS. Upgraded alternatives add AEC-Q200 automotive qualification, which certifies enhanced reliability for automotive environments but does not change electrical or mechanical performance in standard applications.

Q: Does packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) affect compatibility?

A: No. Packaging format affects only handling, storage, and assembly processes. Electrical and mechanical compatibility is identical regardless of packaging format. Selection is based on manufacturing equipment compatibility and inventory requirements.

Q: Why should I avoid CRCW0603300RFKTA?

A: CRCW0603300RFKTA is RoHS non-compliant and REACH affected. If your application or regulatory environment requires ROHS3 compliance, this part does not meet requirements. All other listed alternatives maintain ROHS3 compliance.

Q: Are there dimensional differences between substitute parts?

A: Minor dimensional variations exist within the 0603 package specification. Most alternatives maintain 1.60mm x 0.80mm x 0.55mm maximum dimensions. CRCW0603300RFKEA and RMCF0603FT300R have slightly reduced height (0.50mm) and CRCW0603300RFKEA has increased width (0.85mm). These variations remain within standard 0603 PCB footprint tolerances and do not affect placement or soldering.

Q: Which substitute offers the highest inventory availability?

A: ERJ-3EKF3000V (Panasonic Electronic Components) has 231,180 units in stock, the highest availability among all listed alternatives. CRCW0603300RFKEA (Vishay Dale) has 108,184 units. These options provide maximum supply chain security for high-volume applications.

Q: Can I use an AEC-Q200 qualified part in a non-automotive application?

A: Yes. AEC-Q200 qualification represents enhanced reliability testing and certification. Parts qualified to this standard are fully compatible with non-automotive applications and provide equivalent or superior performance compared to non-qualified alternatives.

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