RCS0603J301CS Equivalent & Substitute Parts

Part Overview

The RCS0603J301CS is a 300 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 currently active in production with 723 pieces available in stock. The part features anti-sulfur and moisture-resistant construction, making it suitable for general-purpose applications requiring standard tolerance resistive elements. Substitute parts are identified when equivalent electrical and mechanical specifications are required, particularly when tolerance upgrades or alternative packaging formats are necessary for specific application requirements.

Substiute Parts

RCS0603J301CS

Samsung Electro-MechanicsIn Stock: 758RCS0603J301CS Datasheet

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RCS0603F301CS

Samsung Electro-MechanicsIn Stock: 985RCS0603F301CS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RCS0603J301CS is determined by strict equivalence in the following critical parameters:

Mandatory Equivalence Parameters:

• Resistance value: 300 Ohms
• Power rating: 0.05W (1/20W)
• Package type: 0201 (0603 Metric)
• Composition: Thick Film
• Temperature coefficient: ±250ppm/°C
• Operating temperature range: -55°C ~ 125°C
• Environmental features: Anti-sulfur, moisture-resistant construction

Allowable Variation Parameters:

• Tolerance: May be tighter (lower tolerance value) than the original ±5%
• Packaging format: May differ (Tape & Reel vs. Cut Tape) without affecting electrical performance
• Product status: Active or discontinued parts with identical specifications remain functionally equivalent

The RCS0603F301CS qualifies as a direct substitute based on these criteria, with the distinction of offering improved tolerance (±1% versus ±5%) while maintaining all other electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

RCS0603J301CS Selection Criteria: The RCS0603J301CS is the appropriate choice for applications where standard ±5% tolerance is acceptable and active product status with continuous supply is required. This part maintains ROHS3 compliance and unlimited moisture sensitivity rating, suitable for standard industrial and consumer electronics applications.

RCS0603F301CS Selection Criteria: The RCS0603F301CS serves as a substitute when tighter tolerance (±1%) is required for precision circuit applications. Although marked as discontinued at DiGi Electronics, this part remains electrically and mechanically equivalent with higher tolerance specification. The marginal height difference (0.26mm versus 0.25mm) is within typical PCB assembly tolerances and does not affect functional performance. Selection of this substitute requires confirmation of availability through alternative distribution channels.

Compliance Considerations: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across global markets. The MSL rating of 1 (Unlimited) for both parts indicates no moisture sensitivity restrictions during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can RCS0603F301CS replace RCS0603J301CS in any application?

A: Yes, the RCS0603F301CS is electrically and mechanically equivalent. The primary difference is improved tolerance (±1% versus ±5%). Applications requiring standard tolerance will function identically with either part. Applications requiring tighter tolerance specifications benefit from the RCS0603F301CS upgrade.

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

A: No. Packaging format differences do not affect electrical or mechanical performance. The choice between Tape & Reel and Cut Tape is determined by assembly process requirements and inventory management practices, not component functionality.

Q: What is the significance of the 0.01mm height difference between the two parts?

A: The height difference (0.25mm versus 0.26mm) is negligible for standard PCB assembly processes. This variation falls within typical component placement tolerances and does not affect circuit performance or board-level compatibility.

Q: Is RCS0603F301CS still available for new designs?

A: RCS0603F301CS is marked as discontinued at DiGi Electronics. Availability must be confirmed through alternative authorized distributors. For new designs requiring guaranteed long-term supply, RCS0603J301CS (active status) is the recommended primary selection.

Q: Are both parts suitable for high-reliability applications?

A: Both parts meet ROHS3 compliance and feature anti-sulfur, moisture-resistant construction. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity restrictions. Selection between them depends on tolerance requirements and supply chain considerations rather than reliability characteristics.

Q: What is the temperature coefficient significance for these parts?

A: Both parts share an identical temperature coefficient of ±250ppm/°C across the -55°C to 125°C operating range. This specification ensures predictable resistance variation across temperature extremes and is equivalent between the main part and substitute.