RC1608F3R6CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F3R6CS is a 3.6 Ohm ±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 designed for general-purpose applications requiring moisture-resistant thick film construction with standard industrial tolerance specifications. The part is Active status and RoHS3 compliant, making it suitable for modern electronic assemblies. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, package type, and compliance certifications to ensure direct interchangeability in circuit designs.

Substiute Parts

RC1608F3R6CS

Samsung Electro-MechanicsIn Stock: 840RC1608F3R6CS Datasheet

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KTR03EZPF3R60

Rohm SemiconductorIn Stock: 1248KTR03EZPF3R60 Datasheet

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RMCF0603FT3R60

Stackpole Electronics IncIn Stock: 112179RMCF0603FT3R60 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1608F3R6CS are qualified based on the following critical parameters that determine functional and mechanical interchangeability:

Electrical Parameters:

• Resistance value: 3.6 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.1W / 1/10W (exact match required)
• Temperature coefficient: Acceptable range ±200ppm/°C to ±300ppm/°C
• Operating temperature range: -55°C ~ 155°C (minimum requirement)

Mechanical Parameters:

• Package type: 0603 (1608 Metric) surface mount (exact match required)
• Number of terminations: 2 (exact match required)
• Physical dimensions: Length 1.55mm to 1.60mm, Width 0.80mm, Height (seated) maximum 0.55mm
• Composition: Thick film (exact match required)

Compliance Parameters:

• RoHS3 compliance (required)
• Moisture Sensitivity Level: MSL 1 (Unlimited)
• Packaging: Tape & Reel format

The identified substitute parts meet all critical electrical and mechanical parameters while maintaining full compliance with RoHS3 and environmental standards.

Parameter Comparison

Engineering Selection Recommendations

RC1608F3R6CS (Samsung Electro-Mechanics) is the primary specification part. Selection of this part is appropriate for applications requiring standard industrial-grade thick film resistors with moisture resistance and general compliance requirements.

KTR03EZPF3R60 (Rohm Semiconductor) qualifies as a direct substitute with enhanced specifications. This part carries AEC-Q200 automotive qualification and features a lower temperature coefficient (±200ppm/°C versus ±300ppm/°C), providing improved temperature stability. The automotive qualification does not restrict use in non-automotive applications. This part is suitable for applications requiring higher reliability margins or automotive-grade component standards.

RMCF0603FT3R60 (Stackpole Electronics Inc) qualifies as a direct substitute with automotive AEC-Q200 qualification and improved temperature coefficient performance (±200ppm/°C). This part has the highest inventory availability (112,123 pieces) among the three options. Physical dimensions are within acceptable tolerance (1.55mm length versus 1.60mm nominal), maintaining full mechanical compatibility. This part is suitable for high-volume production requirements or applications benefiting from automotive-grade reliability standards.

All three parts are RoHS3 compliant, MSL 1 rated, and maintain identical electrical performance in the 3.6 Ohm ±1% 0.1W 0603 package category. Selection between these parts depends on inventory availability, supply chain preferences, and application-specific reliability requirements rather than functional differences.

Frequently Asked Questions (FAQ)

Q: Can KTR03EZPF3R60 or RMCF0603FT3R60 be used as direct replacements for RC1608F3R6CS in existing designs?

A: Yes. Both substitute parts match the critical electrical parameters (3.6 Ohms ±1%, 0.1W power rating) and mechanical specifications (0603 package, 0.55mm maximum height, 2 terminations). All three parts operate across the identical temperature range (-55°C ~ 155°C) and maintain RoHS3 compliance. The substitute parts feature improved temperature coefficients (±200ppm/°C) compared to the original part (±300ppm/°C), which represents enhanced performance rather than a limitation.

Q: What is the significance of the AEC-Q200 automotive qualification on the substitute parts?

A: AEC-Q200 is an automotive industry standard qualification for passive components. Parts carrying this certification have undergone additional reliability testing and quality assurance procedures. The presence of AEC-Q200 on KTR03EZPF3R60 and RMCF0603FT3R60 does not restrict their use in non-automotive applications; it indicates these parts meet or exceed automotive reliability standards and can be used in any application requiring equivalent or higher reliability levels.

Q: Are there physical dimension differences between these parts that affect PCB layout?

A: The length dimension varies slightly: RC1608F3R6CS and KTR03EZPF3R60 are 1.60mm, while RMCF0603FT3R60 is 1.55mm. Both dimensions fall within the 0603 (1608 Metric) package specification tolerance. Width (0.80mm) and maximum seated height (0.55mm) are identical across all three parts. These minor variations do not affect PCB footprint design or assembly compatibility.

Q: What is MSL 1 (Unlimited) and why is it important?

A: Moisture Sensitivity Level (MSL) 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All three parts carry MSL 1 rating, meaning they can be stored under standard warehouse conditions without desiccant packaging or time-limited shelf life restrictions.

Q: How do the temperature coefficients differ between these parts?

A: RC1608F3R6CS has a temperature coefficient of ±300ppm/°C, while both KTR03EZPF3R60 and RMCF0603FT3R60 have ±200ppm/°C. A lower temperature coefficient indicates the resistance value changes less with temperature variations. For applications operating across the full -55°C ~ 155°C range, the substitute parts provide superior temperature stability. This difference is negligible for most general-purpose applications but beneficial for precision circuits.

Q: Which part should be selected for high-volume production?

A: RMCF0603FT3R60 (Stackpole) offers the highest inventory availability at 112,123 pieces, making it the optimal choice for large-volume production runs. KTR03EZPF3R60 (Rohm) has 1,199 pieces available, and RC1608F3R6CS (Samsung) has 797 pieces. Inventory levels should be verified with suppliers for current availability.

Q: Are all three parts suitable for lead-free soldering processes?

A: All three parts are RoHS3 compliant, which requires lead-free composition and compatibility with lead-free soldering processes. The 0603 package format and thick film construction are standard for modern lead-free assembly operations.