RCS0603J680CS Equivalent & Substitute Parts

Part Overview

The RCS0603J680CS is a 68 Ohms ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.05W (1/20W) in a 0201 (0603 Metric) package. This component is designed for surface mount applications requiring moisture resistance and anti-sulfur protection in compact form factors. The part is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

RCS0603J680CS

Samsung Electro-MechanicsIn Stock: 864RCS0603J680CS Datasheet

Current PartRFQ

RC0603F680CS

Samsung Electro-MechanicsIn Stock: 1169RC0603F680CS Datasheet

SimilarRFQ

RC0603J680CS

Samsung Electro-MechanicsIn Stock: 1797RC0603J680CS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RCS0603J680CS is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 68 Ohms
• Power rating: 0.05W (1/20W)
• Package / Case: 0201 (0603 Metric)
• Composition: Thick Film
• Operating temperature range: -55°C ~ 125°C
• Temperature coefficient: ±250ppm/°C
• RoHS compliance: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation:

• Tolerance: ±5% (main part) to ±1% (substitute) — tighter tolerance is acceptable and represents improved performance
• Packaging format: Tape & Reel (TR) to Cut Tape (CT) — both are standard supply formats
• Features: Anti-Sulfur + Moisture Resistant (main part) to Moisture Resistant only (substitute) — feature reduction is acceptable if core electrical and thermal specifications remain unchanged

Two substitute parts meet these criteria: RC0603F680CS (±1% tolerance, Cut Tape) and RC0603J680CS (±5% tolerance, Cut Tape).

Parameter Comparison

Engineering Selection Recommendations

RC0603F680CS Selection Criteria: RC0603F680CS is suitable as a substitute when circuit design requires improved resistance tolerance (±1% versus ±5%). This part maintains all mandatory electrical and thermal specifications, RoHS3 compliance, and unlimited moisture sensitivity rating. The tighter tolerance provides enhanced accuracy for precision applications. Packaging format differs (Cut Tape versus Tape & Reel), which affects procurement and assembly logistics but does not impact electrical performance or PCB compatibility.

RC0603J680CS Selection Criteria: RC0603J680CS is a direct functional equivalent with identical tolerance (±5%), resistance value, power rating, and operating specifications. This part is suitable for applications where the original tolerance specification is acceptable. Like RC0603F680CS, it maintains full RoHS3 compliance and unlimited moisture sensitivity. Packaging format is Cut Tape, requiring adjustment to procurement and assembly processes if the original Tape & Reel format was specified.

Compliance Basis: Both substitute parts are Active status components manufactured by Samsung Electro-Mechanics with ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the main part. All three parts share identical operating temperature ranges (-55°C ~ 125°C) and temperature coefficients (±250ppm/°C), ensuring thermal performance consistency across substitution scenarios.

Frequently Asked Questions (FAQ)

Q: Can RC0603F680CS replace RCS0603J680CS in any application? A: RC0603F680CS is electrically and mechanically compatible with RCS0603J680CS. The ±1% tolerance of RC0603F680CS is tighter than the ±5% tolerance of RCS0603J680CS, making it suitable for applications requiring higher accuracy. Packaging format differs (Cut Tape versus Tape & Reel), which may require assembly process adjustment but does not affect electrical performance.

Q: What is the difference between Tape & Reel and Cut Tape packaging? A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on cut segments of carrier tape, suitable for lower-volume or manual assembly operations. Both formats contain identical components; the difference is in supply and handling logistics.

Q: Are the physical dimensions identical across all three parts? A: The length and width are identical (0.024" L x 0.012" W / 0.60mm x 0.30mm). Maximum seated height differs slightly: RCS0603J680CS is 0.010" (0.25mm), while RC0603F680CS and RC0603J680CS are 0.010" (0.26mm). This 0.01mm difference is within standard PCB assembly tolerances and does not affect compatibility.

Q: Do all three parts meet the same regulatory requirements? A: Yes. RCS0603J680CS, RC0603F680CS, and RC0603J680CS are all ROHS3 compliant, REACH Unaffected, and classified as EAR99 for export control purposes. All three parts carry Moisture Sensitivity Level 1 (Unlimited), requiring no special handling or storage conditions.

Q: Which substitute part should be selected for cost optimization? A: RC0603J680CS offers cost optimization as it matches the tolerance specification (±5%) of the main part while maintaining all electrical and thermal performance parameters. RC0603F680CS should be selected only when the improved ±1% tolerance is required by circuit design specifications.

Q: Can these parts be used interchangeably on the same PCB assembly? A: Yes, all three parts are mechanically and electrically interchangeable on the same PCB. The 0201 (0603 Metric) package footprint is identical across all parts. Substitution requires no PCB redesign or assembly process modification beyond packaging format handling (Tape & Reel versus Cut Tape).