RC0402J123CS Equivalent & Substitute Parts Reference

Part Overview

The RC0402J123CS is a 12 kOhms ±5% chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.03W (1/32W) power dissipation in the 01005 (0402 Metric) package. This thick film, moisture-resistant component operates across the temperature range of -55°C to 125°C and is ROHS3 compliant with MSL 1 rating. The part is currently in active production status with 809 units available in inventory. Equivalent and substitute parts are identified to support procurement flexibility, design redundancy, and supply chain continuity when the primary part becomes unavailable or when design specifications permit tolerance or feature variations.

Substiute Parts

RC0402J123CS

Samsung Electro-MechanicsIn Stock: 903RC0402J123CS Datasheet

Current PartRFQ

CRCW010012K0FREL

Vishay DaleIn Stock: 31301CRCW010012K0FREL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC0402J123CS is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 12 kOhms (exact match required)
• Package / Case: 01005 (0402 Metric) (exact match required for PCB compatibility)
• Power rating: Minimum 0.03W (1/32W) (equal or higher acceptable)
• Composition: Thick Film (maintains electrical performance characteristics)
• Operating temperature range: -55°C to 125°C (minimum requirement)
• Temperature coefficient: ±250ppm/°C (maximum acceptable drift)

Allowable Variations:

• Tolerance: Substitutes with tighter tolerance (±1%) are acceptable as they represent improved performance within the same resistance value
• Moisture Sensitivity Level: MSL 1 rating is maintained across all qualified substitutes
• RoHS and REACH compliance: All substitutes maintain ROHS3 compliance and REACH unaffected status

The CRCW010012K0FREL from Vishay Dale qualifies as a direct substitute based on these criteria. It maintains identical resistance value, package, power rating, composition, and operating temperature range while offering improved tolerance specification (±1% versus ±5%).

Parameter Comparison

Engineering Selection Recommendations

The CRCW010012K0FREL qualifies as a direct substitute for the RC0402J123CS based on complete alignment of all critical electrical and mechanical parameters. Both components are active production parts with ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance across current and future applications.

The Vishay Dale CRCW010012K0FREL offers improved tolerance specification (±1% versus ±5%), which provides enhanced resistance accuracy without introducing any compatibility concerns. This tighter tolerance represents a performance upgrade while maintaining identical package footprint, power rating, and thermal characteristics.

Selection between these parts should be based on procurement availability, lead time requirements, and cost considerations, as both components satisfy all specified electrical and mechanical requirements for direct substitution in the 01005 package form factor.

Frequently Asked Questions (FAQ)

Q: Can the CRCW010012K0FREL replace the RC0402J123CS in existing designs?

A: Yes. The CRCW010012K0FREL is a direct substitute. Both components share identical resistance value (12 kOhms), package (01005/0402 Metric), power rating (0.03W), composition (thick film), and operating temperature range (-55°C to 125°C). The substitute's tighter tolerance (±1%) represents improved performance within the same electrical specification.

Q: Are there any PCB layout or footprint differences between these parts?

A: No. Both the RC0402J123CS and CRCW010012K0FREL use the identical 01005 (0402 Metric) package with dimensions of 0.016" L x 0.008" W (0.40mm x 0.20mm) and maximum seated height of 0.006" (0.15mm). PCB footprints are interchangeable without modification.

Q: What is the significance of the tolerance difference?

A: The RC0402J123CS specifies ±5% tolerance, while the CRCW010012K0FREL specifies ±1% tolerance. Both tolerances are acceptable for the 12 kOhms value. The tighter tolerance of the substitute part provides greater resistance accuracy, which may benefit applications requiring precise impedance matching or tighter circuit performance margins.

Q: Do both parts have the same moisture sensitivity requirements?

A: Yes. Both components carry MSL 1 (Unlimited) rating, indicating identical moisture sensitivity levels and handling requirements. No additional precautions are necessary when substituting between these parts.

Q: Are regulatory compliance certifications identical?

A: Yes. Both the RC0402J123CS and CRCW010012K0FREL are ROHS3 compliant and REACH unaffected, ensuring equivalent regulatory status for applications requiring these certifications.

Q: What is the temperature coefficient specification, and does it differ between parts?

A: Both components specify ±250ppm/°C temperature coefficient, indicating identical resistance stability across the -55°C to 125°C operating range. No performance difference exists in thermal drift characteristics.