MOS2CT52R181J Equivalent & Substitute Parts

Part Overview

The MOS2CT52R181J is a 180 Ohms ±5% 2W through-hole resistor manufactured by KOA Speer Electronics, Inc. This axial metal oxide film resistor features flame retardant coating and safety construction, designed for applications requiring reliable power dissipation in the 2-watt range. The part is currently active in production with 2850 pieces in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory constraints require component flexibility.

Substiute Parts

MOS2CT52R181J

KOA Speer Electronics, Inc.In Stock: 2919MOS2CT52R181J Datasheet

Current PartRFQ

RSF200JB-73-180R

YAGEOIn Stock: 67179RSF200JB-73-180R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MOS2CT52R181J is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 180 Ohms
• Tolerance: ±5%
• Power rating: 2W
• Composition: Metal Oxide Film

Mechanical Equivalence Requirements:

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

Compliance Requirements:

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

Substitute parts must satisfy all electrical and mechanical parameters listed above. Operating temperature range and temperature coefficient variations are acceptable provided the substitute part operates within the application's thermal requirements.

Parameter Comparison

Engineering Selection Recommendations

The RSF200JB-73-180R from YAGEO is electrically and mechanically equivalent to the MOS2CT52R181J for applications requiring 180 Ohms ±5% 2W axial metal oxide film resistors. Both parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for industrial and commercial applications.

Selection Considerations:

The RSF200JB-73-180R operates across an extended temperature range (-55°C ~ 235°C) compared to the MOS2CT52R181J (-55°C ~ 200°C), providing additional thermal margin in high-temperature environments. The YAGEO substitute exhibits larger physical dimensions (5.00mm diameter x 15.50mm length versus 4.00mm x 12.00mm), which may impact board layout and mechanical fit in space-constrained applications.

Both parts maintain identical electrical specifications: 180 Ohms resistance, ±5% tolerance, and 2W power rating. The substitute part is available in significantly higher inventory (67129 pieces), supporting supply chain continuity and lead-time reduction.

Frequently Asked Questions (FAQ)

Q: Can the RSF200JB-73-180R directly replace the MOS2CT52R181J in existing designs?

A: The RSF200JB-73-180R is electrically equivalent and functionally interchangeable for the specified 180 Ohms ±5% 2W application. Physical dimensions differ; verify that the larger form factor (5.00mm x 15.50mm) accommodates the available board space and lead routing in your assembly.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution requires matching resistance value (180 Ohms), tolerance (±5%), power rating (2W), and composition (metal oxide film). Both the primary and substitute parts satisfy these criteria.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 compliant and REACH unaffected. ECCN and HTSUS classifications are identical, ensuring equivalent regulatory and export compliance status.

Q: How do operating temperature ranges affect part selection?

A: The MOS2CT52R181J operates from -55°C to 200°C, while the RSF200JB-73-180R extends to 235°C. Select the RSF200JB-73-180R for applications requiring operation above 200°C. For applications within the -55°C to 200°C range, both parts are suitable.

Q: What packaging differences exist between these parts?

A: The MOS2CT52R181J is supplied in cut tape (CT) format, while the RSF200JB-73-180R is supplied in bulk packaging. Verify compatibility with your component handling and placement equipment.

Q: Are there physical form factor constraints I should consider?

A: Yes. The RSF200JB-73-180R has a larger diameter (5.00mm versus 4.00mm) and length (15.50mm versus 12.00mm). Confirm that your PCB layout, component spacing, and mechanical assembly accommodate the larger axial form factor.