RC5025F1051CS Equivalent & Substitute Parts

Part Overview

The RC5025F1051CS is a 1.05 kOhm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 2010 (5025 Metric) package format. This component is rated for 0.667W (2/3W) continuous power dissipation and operates across the temperature range of -55°C to 155°C. The part is currently in active production status and features moisture-resistant construction with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when alternative manufacturers offer components with matching or superior electrical and mechanical specifications within the same package footprint. Substitution becomes necessary due to supply chain considerations, inventory availability, or design requirement changes while maintaining functional compatibility.

Substiute Parts

RC5025F1051CS

Samsung Electro-MechanicsIn Stock: 788RC5025F1051CS Datasheet

Current PartRFQ

ERJ-12SF1051U

Panasonic Electronic ComponentsIn Stock: 685ERJ-12SF1051U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC5025F1051CS is determined by the following critical parameters:

• Resistance value must be 1.05 kOhms
• Tolerance must be ±1% or tighter
• Package must be 2010 (5025 Metric) to ensure PCB footprint compatibility
• Composition must be thick film
• Temperature coefficient must be ±100ppm/°C or better
• Operating temperature range must encompass -55°C to 155°C minimum
• RoHS3 compliance is required for regulatory alignment

The ERJ-12SF1051U from Panasonic Electronic Components meets all substitution criteria. While this part carries a "Not For New Designs" status, it maintains electrical and mechanical compatibility with the RC5025F1051CS. The ERJ-12SF1051U offers a higher power rating of 0.75W (3/4W), which provides additional thermal margin in applications where the RC5025F1051CS is specified.

Parameter Comparison

Engineering Selection Recommendations

The RC5025F1051CS remains the primary selection for new designs due to its active production status and full manufacturer support. This component is suitable for applications requiring 1.05 kOhm resistance with ±1% tolerance in the 2010 package format.

The ERJ-12SF1051U serves as a functional equivalent for existing designs or applications where component availability from the primary source is constrained. The higher power rating of 0.75W provides additional operational margin compared to the 0.667W specification of the RC5025F1051CS. However, the "Not For New Designs" status of the ERJ-12SF1051U indicates that Panasonic has discontinued active development for this part number. Selection of the ERJ-12SF1051U should be limited to legacy system support or temporary supply chain solutions.

Both components maintain identical electrical performance characteristics, including resistance value, tolerance, temperature coefficient, and operating temperature range. Physical dimensions are equivalent within manufacturing tolerances, with a maximum seated height difference of 0.002" (0.04mm).

Frequently Asked Questions (FAQ)

Q: Can the ERJ-12SF1051U be used as a direct replacement for the RC5025F1051CS?

A: Yes. Both components share identical resistance value (1.05 kOhms), tolerance (±1%), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and 2010 package footprint. The ERJ-12SF1051U has a higher power rating (0.75W versus 0.667W), which is compatible with applications designed for the RC5025F1051CS.

Q: What is the significance of the "Not For New Designs" status on the ERJ-12SF1051U?

A: This designation indicates that Panasonic has transitioned this part number to end-of-life status and is not recommending it for new product development. Existing inventory may remain available, but long-term supply cannot be guaranteed. New designs should prioritize the RC5025F1051CS or other active-status alternatives.

Q: Are there physical compatibility concerns when substituting between these parts?

A: Physical compatibility is maintained. Both components use the 2010 (5025 Metric) package with identical length and width dimensions (5.00mm x 2.50mm). The maximum seated height difference is 0.002" (0.04mm), which is within standard PCB assembly tolerances and does not affect placement or soldering processes.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the RC5025F1051CS and ERJ-12SF1051U are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both components have unlimited moisture sensitivity level (MSL 1) and are suitable for applications requiring regulatory compliance in these areas.

Q: What is the primary advantage of the ERJ-12SF1051U over the RC5025F1051CS?

A: The ERJ-12SF1051U provides a 12.5% higher power rating (0.75W versus 0.667W). In applications operating near the thermal limits of the RC5025F1051CS, the ERJ-12SF1051U offers improved thermal margin and reduced risk of power dissipation-related failures.