MO2C303J Equivalent & Substitute Parts

Part Overview

The MO2C303J is a 30 kOhms ±5% 2W through-hole resistor manufactured by KOA Speer Electronics, Inc. This axial metal oxide film resistor features flame retardant coating and safety characteristics suitable for high-temperature applications. The part is classified as obsolete, necessitating identification of active equivalent components for ongoing procurement and design continuity. Substitute parts must maintain identical electrical specifications while offering improved availability and active product status.

Substiute Parts

MO2C303J

KOA Speer Electronics, Inc.In Stock: 1032MO2C303J Datasheet

Current PartRFQ

MOS2CT52R303J

KOA Speer Electronics, Inc.In Stock: 6597MOS2CT52R303J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MO2C303J is determined by the following critical parameters:

Electrical Specifications (Must Match):

• Resistance value: 30 kOhms
• Tolerance: ±5%
• Power rating: 2W
• Composition: Metal Oxide Film

Environmental & Compliance (Must Match):

• Operating temperature range: -55°C ~ 200°C
• Flame retardant coating and safety features
• RoHS3 compliance
• REACH unaffected status

Package Compatibility (Must Match):

• Package type: Axial through-hole
• Number of terminations: 2

The MOS2CT52R303J qualifies as a direct substitute based on identical electrical specifications, matching environmental operating range, equivalent safety features, and compatible axial package configuration. Dimensional variations within the axial package category do not preclude substitution for through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

The MOS2CT52R303J is the manufacturer-recommended substitute for the obsolete MO2C303J. Both components are manufactured by KOA Speer Electronics, Inc. and maintain identical electrical performance specifications across resistance, tolerance, power rating, and composition.

Compliance & Availability: The MOS2CT52R303J holds active product status with significantly higher inventory availability (6587 pcs in stock versus 957 pcs for the obsolete MO2C303J). Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility in current manufacturing environments.

Physical Considerations: The substitute part features a smaller axial package (4.00mm x 12.00mm versus 6.00mm x 15.50mm). This dimensional reduction is compatible with through-hole PCB applications and does not compromise electrical performance. The reduced size may provide layout advantages in space-constrained designs.

Temperature Performance: The MOS2CT52R303J exhibits a temperature coefficient of ±300ppm/°C compared to ±200ppm/°C for the original part. Both components operate across the identical temperature range of -55°C ~ 200°C. The slightly higher temperature coefficient remains within acceptable tolerances for metal oxide film resistor applications and does not restrict substitution.

Frequently Asked Questions (FAQ)

Q: Can the MOS2CT52R303J directly replace the MO2C303J in existing designs?

A: Yes. The MOS2CT52R303J is electrically and functionally equivalent to the MO2C303J. Both components share identical resistance (30 kOhms), tolerance (±5%), power rating (2W), composition (metal oxide film), and operating temperature range (-55°C ~ 200°C). The axial package configuration is compatible with through-hole PCB layouts designed for the original part.

Q: What is the significance of the different physical dimensions?

A: The MOS2CT52R303J is physically smaller (4.00mm x 12.00mm) than the MO2C303J (6.00mm x 15.50mm). This dimensional difference does not affect electrical performance or through-hole compatibility. The reduced size may provide layout benefits in compact designs without requiring circuit modifications.

Q: How does the temperature coefficient difference impact substitution?

A: The MOS2CT52R303J has a temperature coefficient of ±300ppm/°C versus ±200ppm/°C for the MO2C303J. Both components operate across the same temperature range (-55°C ~ 200°C). The difference in temperature coefficient is within acceptable parameters for metal oxide film resistor applications and does not preclude direct substitution.

Q: Are there compliance or regulatory differences between these parts?

A: No. Both the MO2C303J and MOS2CT52R303J are ROHS3 compliant and REACH unaffected. They maintain identical regulatory status and are suitable for equivalent applications in current manufacturing environments.

Q: Why is the MOS2CT52R303J recommended over the original part?

A: The MO2C303J is classified as obsolete, while the MOS2CT52R303J maintains active product status. The substitute part offers superior availability (6587 pcs in stock) and ensures long-term procurement continuity. Electrical and environmental specifications remain identical.

Q: What packaging format is the MOS2CT52R303J supplied in?

A: The MOS2CT52R303J is supplied in Cut Tape (CT) packaging, which is standard for through-hole component distribution and compatible with automated assembly processes.