MOS2CT52R121J Equivalent & Substitute Parts

Part Overview

The MOS2CT52R121J is a 120 Ohm, 2W through-hole axial resistor manufactured by KOA Speer Electronics, Inc. This metal oxide film resistor features flame retardant coating and safety design characteristics. The component is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when original inventory becomes unavailable, when alternative suppliers offer equivalent electrical and mechanical specifications, or when design flexibility permits component sourcing from multiple manufacturers while maintaining circuit performance and reliability standards.

Substiute Parts

MOS2CT52R121J

KOA Speer Electronics, Inc.In Stock: 938MOS2CT52R121J Datasheet

Current PartRFQ

RSF200JB-73-120R

YAGEOIn Stock: 3333RSF200JB-73-120R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MOS2CT52R121J are identified based on strict equivalence of the following critical parameters:

Electrical Equivalence Criteria:

• Resistance value: 120 Ohms
• Tolerance: ±5%
• Power rating: 2W
• Composition: Metal Oxide Film

Mechanical Equivalence Criteria:

• Package configuration: Axial through-hole
• Number of terminations: 2
• Physical form factor: Axial lead configuration

Compliance Criteria:

• RoHS3 compliance status
• REACH unaffected designation
• ECCN classification: EAR99

The RSF200JB-73-120R from YAGEO meets all electrical and mechanical equivalence requirements. Both components share identical resistance, tolerance, power rating, and composition specifications. Both are packaged in axial configuration with two terminations. Both maintain RoHS3 compliance and REACH unaffected status. Physical dimensions differ slightly, and operating temperature range extends to 235°C for the substitute part, representing an expanded operational envelope.

Parameter Comparison

Engineering Selection Recommendations

MOS2CT52R121J Selection Criteria: The KOA Speer MOS2CT52R121J is the primary component choice when original part specifications are required. This component maintains Active product status with established supply chain availability (879 pieces in stock). Selection is appropriate for applications where the specified operating temperature range of -55°C to 200°C is sufficient and where the compact axial dimensions (4.00mm diameter x 12.00mm length) provide design advantages in space-constrained layouts.

RSF200JB-73-120R Selection Criteria: The YAGEO RSF200JB-73-120R serves as a direct electrical and mechanical substitute when the MOS2CT52R121J becomes unavailable. This component maintains equivalent electrical performance with identical resistance, tolerance, power rating, and composition specifications. The extended operating temperature range to 235°C provides additional thermal margin for applications requiring higher temperature operation. The larger physical dimensions (5.00mm diameter x 15.50mm length) require verification of board layout compatibility. Both components maintain identical RoHS3 and REACH compliance status, ensuring regulatory equivalence. The RSF200JB-73-120R demonstrates higher inventory availability (3270 pieces in stock), supporting supply chain flexibility.

Substitution Constraints: Physical dimensions differ between the two components. PCB layout verification is required when substituting the RSF200JB-73-120R for the MOS2CT52R121J due to increased diameter and length. Both components are suitable for identical electrical circuit applications where the 120 Ohm, 2W, ±5% specification is required.

Frequently Asked Questions (FAQ)

Q: Can the RSF200JB-73-120R replace the MOS2CT52R121J in all applications?

A: The RSF200JB-73-120R provides electrical equivalence for all circuit applications requiring 120 Ohm, 2W, ±5% tolerance metal oxide film resistors. Physical dimensions differ; board layout compatibility must be verified before substitution. The extended operating temperature range of the substitute part (235°C versus 200°C) does not restrict its use in applications designed for the original component.

Q: What are the key differences between these two components?

A: Both components share identical electrical specifications: 120 Ohms, ±5% tolerance, 2W power rating, and metal oxide film composition. Physical dimensions differ, with the YAGEO part measuring 5.00mm diameter x 15.50mm length compared to the KOA Speer part at 4.00mm diameter x 12.00mm length. The YAGEO component operates to 235°C versus 200°C for the KOA Speer component. Both maintain RoHS3 compliance and REACH unaffected status.

Q: Are there temperature coefficient differences between these components?

A: The MOS2CT52R121J specifies a temperature coefficient of ±300ppm/°C. The RSF200JB-73-120R temperature coefficient is not provided in the available specifications. For applications where temperature coefficient performance is critical, the documented specification of the KOA Speer component should be referenced.

Q: What packaging differences exist between these components?

A: The MOS2CT52R121J is supplied in Cut Tape (CT) packaging. The RSF200JB-73-120R is supplied in Bulk packaging. Both components are axial through-hole resistors with identical lead configuration and two terminations. Packaging format affects handling and assembly processes but does not impact electrical or mechanical performance.

Q: Can these components be used interchangeably on the same PCB?

A: Electrical interchangeability is confirmed. Mechanical interchangeability requires PCB layout verification due to dimensional differences. The RSF200JB-73-120R's larger diameter (5.00mm versus 4.00mm) and length (15.50mm versus 12.00mm) may affect board routing, component spacing, and assembly clearances. Physical fit verification is required before substitution.

Q: What compliance certifications apply to both components?

A: Both the MOS2CT52R121J and RSF200JB-73-120R maintain RoHS3 compliance and REACH unaffected designation. Both are classified under ECCN EAR99 and HTSUS 8533.21.0090. Regulatory equivalence is confirmed for both components.