RC0603F4991CS Equivalent & Substitute Parts

Part Overview

The RC0603F4991CS is a 4.99 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.05W (1/20W) in a 0201 (0603 Metric) surface mount package. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The part is designed for applications requiring precision resistive elements in compact form factors with moisture resistance characteristics. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when design requirements permit functional alternatives.

Substiute Parts

RC0603F4991CS

Samsung Electro-MechanicsIn Stock: 920RC0603F4991CS Datasheet

Current PartRFQ

CRCW02014K99FKED

Vishay DaleIn Stock: 10460CRCW02014K99FKED Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC0603F4991CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 4.99 kOhms (exact match required)
• Tolerance: ±1% (precision grade equivalence)
• Power Rating: 0.05W / 1/20W (thermal capacity equivalence)
• Package Type: 0201 (0603 Metric) (physical and electrical footprint compatibility)
• Composition: Thick Film (manufacturing process equivalence)
• RoHS Status: ROHS3 Compliant (regulatory equivalence)
• Moisture Sensitivity Level: MSL 1 (handling equivalence)

Allowable Variation Parameters:

• Operating Temperature Range: Substitute may exceed the main part specification (extended range acceptable)
• Temperature Coefficient: Substitute specification may differ within industry-standard ranges for thick film resistors

The CRCW02014K99FKED from Vishay Dale meets all mandatory matching parameters and qualifies as a direct electrical and mechanical equivalent with enhanced operating temperature range (-55°C ~ 155°C versus -55°C ~ 125°C).

Parameter Comparison

Engineering Selection Recommendations

The CRCW02014K99FKED qualifies as a direct substitute for the RC0603F4991CS based on complete electrical and mechanical equivalence across all mandatory parameters. Both components are Active product status with identical RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications.

The Vishay Dale substitute demonstrates enhanced performance characteristics in two areas: extended operating temperature range (155°C maximum versus 125°C) and superior temperature coefficient (±100ppm/°C versus ±250ppm/°C). These enhancements do not create incompatibility; they represent performance margins that exceed the original specification.

Selection between the main part and substitute should be based on:

• Inventory availability and lead time requirements
• Supply chain continuity objectives
• Cost considerations
• Application-specific thermal environment demands

Both components are suitable for direct PCB footprint replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can CRCW02014K99FKED be used as a direct replacement for RC0603F4991CS without PCB redesign?

A: Yes. Both components share identical package dimensions (0201 / 0603 Metric), footprint, and electrical specifications (4.99 kOhms ±1%, 0.05W). Direct PCB substitution is supported without layout or schematic modification.

Q: What is the significance of the different operating temperature ranges?

A: The RC0603F4991CS operates from -55°C to 125°C, while the CRCW02014K99FKED operates from -55°C to 155°C. The substitute part has an extended upper temperature limit. If your application operates within -55°C to 125°C, both parts are functionally equivalent. If your application requires operation above 125°C, only the Vishay Dale substitute is suitable.

Q: Why does the temperature coefficient differ between the two parts?

A: Temperature coefficient (±250ppm/°C versus ±100ppm/°C) reflects manufacturing process variations between Samsung and Vishay thick film resistor technologies. The Vishay part exhibits lower temperature-dependent resistance drift. For applications with tight tolerance requirements across temperature ranges, the lower coefficient provides superior stability.

Q: Are both parts RoHS3 compliant?

A: Yes. Both RC0603F4991CS and CRCW02014K99FKED are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: What does MSL 1 (Unlimited) mean for handling and storage?

A: MSL 1 classification indicates the component has unlimited shelf life and does not require moisture-controlled storage or baking procedures prior to soldering. Both parts can be stored under standard warehouse conditions without special environmental controls.

Q: Can I mix these two part numbers in the same production batch?

A: Yes. Both components are electrically and mechanically equivalent with identical package specifications. Mixed sourcing from Samsung and Vishay does not create compatibility issues on the same PCB assembly.

Q: What is the difference between the series designations (RC versus CRCW)?

A: RC is the Samsung Electro-Mechanics series designation, while CRCW is the Vishay Dale series designation. These are manufacturer-specific product line identifiers and do not affect functional equivalence or substitutability.