RC1608F394CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F394CS is a 390 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with moisture-resistant characteristics suitable for general-purpose SMD applications. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and compliance certifications to ensure direct interchangeability in circuit designs.

Key Parameters

Parameter	Specification
Resistance Value	390 kOhms
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
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the RC1608F394CS are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Core Matching Parameters:

Resistance value: 390 kOhms
Tolerance: ±1%
Power rating: 0.1W (1/10W)
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Termination count: 2
RoHS3 compliance
MSL rating: 1 (Unlimited)

Substitution Categories:

Direct Substitutes maintain identical specifications with no additional features:

CR0603-FX-3903ELF (Bourns Inc.)
RC0603FR-07390KL (YAGEO)

Upgrade Substitutes include enhanced features while maintaining core electrical specifications:

KTR03EZPF3903 (Rohm Semiconductor) — Automotive AEC-Q200, High Voltage rated

Similar Substitutes include automotive qualification or specialized features:

AC0603FR-07390KL (YAGEO) — Automotive AEC-Q200, Moisture Resistant
AF0603FR-07390KL (YAGEO) — Anti-Sulfur, Automotive AEC-Q200
CRCW0603390KFKEA (Vishay Dale) — Automotive AEC-Q200
ERJ-3EKF3903V (Panasonic) — Automotive AEC-Q200
RMCF0603FG390K (Stackpole Electronics) — Automotive AEC-Q200
RMCF0603FT390K (Stackpole Electronics) — Automotive AEC-Q200

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Op. Temp	Features	Packaging Type
RC1608F394CS	Samsung Electro-Mechanics	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	Moisture Resistant	Tape & Reel
CR0603-FX-3903ELF	Bourns Inc.	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	Moisture Resistant	Tape & Reel
RC0603FR-07390KL	YAGEO	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	Moisture Resistant	Cut Tape & Digi-Reel
KTR03EZPF3903	Rohm Semiconductor	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200, High Voltage	Tape & Reel
AC0603FR-07390KL	YAGEO	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200, Moisture Resistant	Tape & Reel
AF0603FR-07390KL	YAGEO	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	Anti-Sulfur, AEC-Q200	Tape & Reel
CRCW0603390KFKEA	Vishay Dale	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200	Tape & Reel
ERJ-3EKF3903V	Panasonic Electronic Components	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200	Tape & Reel
RMCF0603FG390K	Stackpole Electronics Inc	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200	Cut Tape
RMCF0603FT390K	Stackpole Electronics Inc	390 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200	Tape & Reel

Engineering Selection Recommendations

For General-Purpose Applications: Select CR0603-FX-3903ELF (Bourns Inc.) or RC0603FR-07390KL (YAGEO) as direct functional equivalents. Both maintain identical electrical and mechanical specifications with ROHS3 compliance and MSL 1 rating.

For Automotive Applications: Select from AEC-Q200 qualified alternatives: KTR03EZPF3903 (Rohm Semiconductor), AC0603FR-07390KL (YAGEO), AF0603FR-07390KL (YAGEO), CRCW0603390KFKEA (Vishay Dale), ERJ-3EKF3903V (Panasonic), RMCF0603FG390K (Stackpole), or RMCF0603FT390K (Stackpole). All maintain core specifications with automotive qualification.

For High-Voltage Applications: KTR03EZPF3903 (Rohm Semiconductor) includes high-voltage rating in addition to AEC-Q200 qualification.

For Corrosive Environments: AF0603FR-07390KL (YAGEO) includes anti-sulfur feature for enhanced environmental protection.

Packaging Considerations:

Tape & Reel (TR) packaging: Preferred for automated assembly
Cut Tape (CT): Suitable for manual or mixed-volume assembly
Digi-Reel: Alternative reel format for specific equipment compatibility

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical operating temperature range (-55°C ~ 155°C).

Frequently Asked Questions (FAQ)

Q: Can RC0603FR-07390KL replace RC1608F394CS directly? A: Yes. RC0603FR-07390KL (YAGEO) matches all core electrical specifications: 390 kOhms ±1%, 0.1W power rating, 0603 package, ±100ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. Both are ROHS3 compliant with MSL 1 rating. Packaging differs (Cut Tape & Digi-Reel vs. Tape & Reel), which affects assembly process compatibility.

Q: What is the difference between direct substitutes and AEC-Q200 qualified parts? A: Direct substitutes (CR0603-FX-3903ELF, RC0603FR-07390KL) maintain identical specifications without automotive qualification. AEC-Q200 qualified parts (KTR03EZPF3903, AC0603FR-07390KL, AF0603FR-07390KL, CRCW0603390KFKEA, ERJ-3EKF3903V, RMCF0603FG390K, RMCF0603FT390K) include automotive-grade reliability testing and qualification. Selection depends on application requirements.

Q: Are dimensional tolerances identical across all substitute parts? A: Core dimensions are equivalent (0603 package = 1.60mm x 0.80mm nominal). Minor variations exist: CRCW0603390KFKEA dimensions are 1.55mm x 0.85mm with 0.50mm max height; RMCF series dimensions are 1.55mm x 0.80mm. These variations remain within 0603 package class tolerances and do not affect PCB footprint compatibility.

Q: Which substitute offers the best inventory availability? A: RC0603FR-07390KL (YAGEO) has 112,311 pieces in stock. ERJ-3EKF3903V (Panasonic) has 97,790 pieces. RMCF0603FT390K (Stackpole) has 80,278 pieces. Availability varies by supplier and time.

Q: Can I use RMCF0603FG390K (Cut Tape) in automated assembly? A: RMCF0603FG390K uses Cut Tape (CT) packaging, which requires manual feeding or specialized equipment. For automated assembly, select Tape & Reel (TR) packaged alternatives: CR0603-FX-3903ELF, RC0603FR-07390KL, KTR03EZPF3903, AC0603FR-07390KL, AF0603FR-07390KL, CRCW0603390KFKEA, ERJ-3EKF3903V, or RMCF0603FT390K.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original RC1608F394CS specification.

Q: What does ±100ppm/°C temperature coefficient mean for circuit performance? A: Temperature coefficient specifies resistance change per degree Celsius. At ±100ppm/°C, a 390 kOhm resistor changes approximately 0.039 Ohms per °C. All substitute parts maintain this specification, ensuring consistent circuit behavior across the -55°C ~ 155°C operating range.

Q: Can AF0603FR-07390KL be used in sulfur-rich environments? A: AF0603FR-07390KL includes anti-sulfur feature, providing enhanced protection in corrosive environments. Standard moisture-resistant parts (RC1608F394CS, CR0603-FX-3903ELF, RC0603FR-07390KL) do not include this feature.

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