RC1608F390CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F390CS is a 39 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 characteristics and unlimited moisture sensitivity level (MSL 1). The part is ROHS3 compliant and suitable for general industrial applications requiring standard moisture resistance.

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements necessitate alternative certifications such as automotive AEC-Q200 qualification or enhanced performance features.

Key Parameters

Parameter	Value	Substitution Relevance
Resistance Value	39 Ohms	Critical - must match exactly
Tolerance	±1%	Critical - must match exactly
Power Rating	0.1W (1/10W)	Critical - must match exactly
Package / Case	0603 (1608 Metric)	Critical - determines PCB footprint compatibility
Composition	Thick Film	Critical - determines electrical characteristics
Temperature Coefficient	±100ppm/°C	Critical - determines temperature stability
Operating Temperature Range	-55°C ~ 155°C	Critical - determines thermal operating envelope
Moisture Sensitivity Level	MSL 1 (Unlimited)	Important - determines handling and storage requirements
RoHS Status	ROHS3 Compliant	Important - determines regulatory compliance
Certifications	None (standard) / AEC-Q200 (automotive variants)	Important - determines application suitability

Substitute Part Grouping Explanation

Substitution logic for the RC1608F390CS is based strictly on electrical and mechanical parameter matching. All substitute parts must satisfy the following mandatory criteria:

Electrical Parameters (Non-negotiable):

Resistance: 39 Ohms
Tolerance: ±1%
Power Rating: 0.1W (1/10W)
Temperature Coefficient: ±100ppm/°C
Operating Temperature Range: -55°C ~ 155°C
Composition: Thick Film

Mechanical Parameters (Non-negotiable):

Package / Case: 0603 (1608 Metric)
Number of Terminations: 2
Moisture Sensitivity Level: MSL 1 (Unlimited)

Compliance Parameters (Application-dependent):

RoHS Status: ROHS3 Compliant (all candidates meet this requirement)
Certifications: Standard industrial or AEC-Q200 automotive grade

Substitute parts are grouped into three categories based on feature alignment:

Direct Substitutes: Parts with identical electrical, mechanical, and compliance specifications. These parts are interchangeable without design modification.

Upgrade Substitutes: Parts meeting all mandatory parameters with additional certifications (AEC-Q200) or enhanced features. These parts provide equivalent or superior performance for the same application.

Similar Substitutes: Parts meeting all mandatory parameters with minor dimensional variations within acceptable tolerances or alternative feature sets. These parts require verification of PCB layout compatibility.

Parameter Comparison

Manufacturer	Part Number	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Features	Certification	Product Status
Samsung Electro-Mechanics	RC1608F390CS	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Moisture Resistant	Standard	Active
Bourns Inc.	CR0603-FX-39R0ELF	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Moisture Resistant	Standard	Active
YAGEO	RC0603FR-0739RL	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Moisture Resistant	Standard	Active
Rohm Semiconductor	KTR03EZPF39R0	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	High Voltage	AEC-Q200	Active
YAGEO	AC0603FR-0739RL	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Moisture Resistant	AEC-Q200	Active
Vishay Dale	CRCW060339R0FKEA	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Standard	AEC-Q200	Active
Vishay Dale	CRCW060339R0FKEB	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Standard	AEC-Q200	Discontinued
Panasonic Electronic Components	ERJ-3EKF39R0V	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Standard	AEC-Q200	Active
Stackpole Electronics Inc	RMCF0603FT39R0	39 Ω	±1%	0.1	0603	±100ppm/°C	-55 to 155°C	Standard	AEC-Q200	Active

Engineering Selection Recommendations

For Direct Replacement (Standard Industrial Applications):

CR0603-FX-39R0ELF (Bourns Inc.) and RC0603FR-0739RL (YAGEO) are direct substitutes meeting all electrical and mechanical specifications of the RC1608F390CS. Both parts maintain standard industrial certification without automotive qualification. Selection between these options depends on supply availability and packaging preference (Tape & Reel for both).

For Automotive or Enhanced Reliability Applications:

KTR03EZPF39R0 (Rohm Semiconductor), AC0603FR-0739RL (YAGEO), CRCW060339R0FKEA (Vishay Dale), ERJ-3EKF39R0V (Panasonic), and RMCF0603FT39R0 (Stackpole) all provide AEC-Q200 automotive qualification while maintaining identical electrical parameters. These parts are suitable for applications requiring automotive-grade reliability and traceability.

Parts to Avoid:

CRCW060339R0FKEB (Vishay Dale) is discontinued at DiGi Electronics and should not be selected for new designs requiring long-term supply assurance.

Dimensional Considerations:

All substitute parts conform to 0603 (1608 Metric) package specification. Minor dimensional variations exist within tolerance:

Standard dimension: 0.063" L x 0.031" W (1.60mm x 0.80mm)
Vishay variants: 0.061-0.063" L x 0.033-0.085" W (1.55-1.60mm x 0.85mm)
Stackpole variant: 0.061" L x 0.031" W (1.55mm x 0.80mm)

These variations remain within 0603 package tolerance and do not affect PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F390CS with any 39 Ohm 0603 resistor?

A: No. Substitution requires matching all critical parameters: 39 Ohm resistance, ±1% tolerance, 0.1W power rating, thick film composition, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, and 0603 package. Additional certifications (AEC-Q200) are optional enhancements but do not disqualify a part from substitution.

Q: What is the difference between standard and AEC-Q200 variants?

A: AEC-Q200 certification indicates automotive-grade qualification with enhanced reliability testing, traceability requirements, and quality assurance protocols. Electrically and mechanically, AEC-Q200 parts are identical to standard industrial parts. AEC-Q200 variants are suitable for automotive applications and high-reliability industrial applications.

Q: Are there packaging differences between substitute parts?

A: All substitute parts are supplied in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® packaging suitable for automated assembly. Packaging format does not affect component electrical performance or PCB compatibility.

Q: Can I use CRCW060339R0FKEB as a substitute?

A: CRCW060339R0FKEB is discontinued at DiGi Electronics and should not be selected for new designs. Use CRCW060339R0FKEA (active status) instead.

Q: Do dimensional variations affect PCB layout?

A: No. All substitute parts conform to 0603 (1608 Metric) package specification. Dimensional variations (0.061-0.063" length, 0.031-0.085" width) remain within standard 0603 tolerance and do not require PCB footprint modification.

Q: Which substitute offers the best supply availability?

A: RC0603FR-0739RL (YAGEO) and RMCF0603FT39R0 (Stackpole) demonstrate highest inventory levels (1,000,400 and 107,350 units respectively), indicating superior supply availability for high-volume applications.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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