RC0603J303CS Equivalent & Substitute Parts

Part Overview

The RC0603J303CS is a 30 kOhms ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0201 (0603 Metric) package format. This surface mount device is rated for 0.05W (1/20W) power dissipation and operates across -55°C to 125°C. The part is currently active in production with 706 units in stock.

Substitute parts are necessary when the original RC0603J303CS becomes unavailable, when procurement lead times require alternative sourcing, or when design specifications allow for improved tolerance grades. The substitute parts listed maintain the same resistance value, package dimensions, and power rating while offering variations in tolerance, temperature coefficient, and manufacturer-specific features.

Substiute Parts

RC0603J303CS

Samsung Electro-MechanicsIn Stock: 738RC0603J303CS Datasheet

Current PartRFQ

RC0603F303CS

Samsung Electro-MechanicsIn Stock: 15756RC0603F303CS Datasheet

UpgradeRFQ

RCS0603F3002CS

Samsung Electro-MechanicsIn Stock: 1152RCS0603F3002CS Datasheet

UpgradeRFQ

CRCW020130K0FKED

Vishay DaleIn Stock: 16761CRCW020130K0FKED Datasheet

UpgradeRFQ

MCR006YRTF3002

Rohm SemiconductorIn Stock: 11109MCR006YRTF3002 Datasheet

SimilarRFQ

MCR006YRTJ303

Rohm SemiconductorIn Stock: 2107MCR006YRTJ303 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the RC0603J303CS is based on the following critical parameters that must remain constant or improve:

Mandatory Matching Parameters:

• Resistance value: 30 kOhms (exact match required)
• Package / Case: 0201 (0603 Metric) (exact match required)
• Power rating: 0.05W minimum (equal or higher acceptable)
• Number of terminations: 2 (exact match required)
• Operating temperature range: -55°C to 125°C minimum (equal or wider acceptable)
• RoHS compliance: ROHS3 Compliant (required)
• Moisture Sensitivity Level: MSL 1 (required)

Allowable Variations:

• Tolerance: ±5% (original) to ±1% (upgrade acceptable)
• Temperature coefficient: ±250ppm/°C (original) to ±100ppm/°C (upgrade acceptable)
• Composition: Thick Film (maintained across all substitutes)
• Packaging format: Tape & Reel (TR) or Cut Tape (CT) (both acceptable)
• Manufacturer: Samsung Electro-Mechanics, Vishay Dale, or Rohm Semiconductor (all qualified)

Substitute parts are categorized as "Upgrade" when tolerance improves from ±5% to ±1%, and as "Similar" when tolerance remains at ±5% or when the part is discontinued.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Upgrade Path): RC0603F303CS is the recommended primary substitute. This Samsung Electro-Mechanics part maintains identical package dimensions, power rating, and operating temperature range while improving tolerance from ±5% to ±1%. The part is currently active in production with 15,736 units in stock, ensuring availability and supply chain continuity.

Secondary Substitute (Upgrade Path): CRCW020130K0FKED from Vishay Dale provides an upgrade option with improved tolerance (±1%) and extended operating temperature range (-55°C to 155°C). The temperature coefficient improves to ±100ppm/°C. This part is active in production with 16,656 units in stock.

Alternative Substitutes (Tolerance Match): MCR006YRTJ303 from Rohm Semiconductor maintains the original ±5% tolerance specification. This part is discontinued at DiGi Electronics but 2,043 units remain in stock. Use this option only when tolerance upgrade is not required and original tolerance specification must be preserved.

Discontinued Parts (Limited Availability): RCS0603F3002CS and MCR006YRTF3002 are discontinued at DiGi Electronics. These parts should be used only when existing inventory is available and no active alternatives meet design requirements. RCS0603F3002CS includes anti-sulfur features not present in other substitutes.

Compliance Verification: All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical termination configuration. All parts are suitable for direct PCB assembly replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can RC0603F303CS replace RC0603J303CS directly on the PCB?

A: Yes. RC0603F303CS is a direct mechanical and electrical replacement. Both parts share identical package dimensions (0.024" L x 0.012" W), height (0.010" max), power rating (0.05W), and operating temperature range (-55°C to 125°C). The tolerance improvement from ±5% to ±1% does not affect PCB layout or assembly procedures.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is supplied on continuous carrier tape wound on reels, suitable for automated pick-and-place assembly. Cut Tape packaging is supplied in shorter tape segments, suitable for manual assembly or small-volume production. Both formats contain identical components. Selection depends on assembly equipment and production volume requirements.

Q: Why does CRCW020130K0FKED have an extended operating temperature range?

A: CRCW020130K0FKED from Vishay Dale is specified for -55°C to 155°C operation, compared to -55°C to 125°C for the original RC0603J303CS. This extended range is a manufacturer-specific design characteristic of the Vishay CRCW series. Use this part only if the extended temperature capability is required by system specifications.

Q: Are discontinued parts suitable for new designs?

A: Discontinued parts (RCS0603F3002CS, MCR006YRTF3002, MCR006YRTJ303) should not be used in new designs. These parts are no longer in active production and inventory will eventually deplete. Use active parts (RC0603F303CS or CRCW020130K0FKED) for new designs to ensure long-term supply chain availability.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 rating indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This applies to all listed parts and means standard warehouse storage conditions are acceptable without desiccant packaging or humidity monitoring.

Q: Can I use a ±1% tolerance part in place of a ±5% tolerance specification?

A: Yes. A ±1% tolerance part is a direct upgrade and will function correctly in any circuit designed for ±5% tolerance. The tighter tolerance provides improved circuit accuracy and stability. No design changes are required.

Q: What is the significance of temperature coefficient (ppm/°C)?

A: Temperature coefficient indicates how much the resistance value changes per degree Celsius of temperature change. CRCW020130K0FKED has ±100ppm/°C (superior stability), while other parts have ±250ppm/°C. For most applications, both values are acceptable. Use the lower temperature coefficient only if circuit design requires enhanced temperature stability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. This compliance status is maintained across all manufacturers (Samsung Electro-Mechanics, Vishay Dale, Rohm Semiconductor) and all packaging formats.