MOS2CT52R390J Equivalent & Substitute Parts

Part Overview

The MOS2CT52R390J is a 39 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, operating across a temperature range of -55°C to 200°C. The component is classified as Active product status with full ROHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical specifications, mechanical packaging, and compliance certifications align with the original component requirements, enabling direct replacement in circuit applications without performance degradation.

Substiute Parts

MOS2CT52R390J

KOA Speer Electronics, Inc.In Stock: 2535MOS2CT52R390J Datasheet

Current PartRFQ

ROX2SJ39R

TE Connectivity Passive ProductIn Stock: 3746ROX2SJ39R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOS2CT52R390J is determined by strict alignment of the following critical parameters:

Electrical Specifications: Resistance value (39 Ohms), tolerance (±5%), and power rating (2W) must be identical. Metal oxide film composition is required to maintain thermal stability and pulse withstanding characteristics.

Mechanical Compatibility: Axial package configuration with two terminations is mandatory for direct board-level replacement. Physical dimensions must accommodate existing PCB footprints and lead spacing.

Environmental & Compliance Requirements: Operating temperature range must encompass -55°C to 200°C minimum. ROHS3 compliance is required for regulatory alignment. Active product status ensures ongoing manufacturer support and supply chain availability.

Safety & Performance Features: Flame retardant or flame proof coating is required. Metal oxide film construction ensures pulse withstanding capability and safety design standards.

The ROX2SJ39R from TE Connectivity Passive Product meets all substitution criteria and qualifies as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the MOS2CT52R390J and ROX2SJ39R are Active product status components with ROHS3 compliance, ensuring regulatory alignment and ongoing manufacturer support. Selection between these equivalents is based on application-specific requirements and supply chain considerations.

The MOS2CT52R390J features a temperature coefficient of ±300ppm/°C with flame retardant coating. The ROX2SJ39R provides a temperature coefficient of ±350ppm/°C with flame proof and pulse withstanding characteristics. Both components operate across the identical temperature range of -55°C to 200°C and deliver 2W power dissipation at 39 Ohms ±5% tolerance.

Physical dimension variance exists between the two parts: the MOS2CT52R390J measures 0.157" diameter by 0.472" length, while the ROX2SJ39R measures 0.197" diameter by 0.472" length. This dimensional difference may impact PCB layout considerations in space-constrained applications. Both components are supplied in Cut Tape packaging and feature two axial terminations for through-hole mounting.

Component selection should prioritize availability, lead time, and specific application thermal or pulse withstanding requirements. Both parts satisfy identical electrical and compliance specifications for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can ROX2SJ39R replace MOS2CT52R390J in all applications?

A: Yes. Both components share identical electrical specifications (39 Ohms ±5%, 2W power rating), operating temperature range (-55°C to 200°C), metal oxide film composition, and ROHS3 compliance. Physical dimensions differ slightly; verify PCB layout accommodates the ROX2SJ39R diameter of 0.197" versus the MOS2CT52R390J diameter of 0.157".

Q: What is the significance of the temperature coefficient difference?

A: The MOS2CT52R390J exhibits ±300ppm/°C while the ROX2SJ39R exhibits ±350ppm/°C. Both values fall within acceptable ranges for metal oxide film resistors. Applications requiring maximum temperature stability should prioritize the lower coefficient; however, both components maintain ±5% tolerance across the full operating temperature range.

Q: Are there packaging or lead compatibility issues?

A: Both components feature axial package configuration with two terminations and identical lead length (0.472"). The primary difference is body diameter: MOS2CT52R390J at 0.157" and ROX2SJ39R at 0.197". Verify PCB footprint spacing accommodates the larger diameter if substituting to ROX2SJ39R.

Q: What compliance certifications apply to both parts?

A: Both MOS2CT52R390J and ROX2SJ39R are ROHS3 compliant. The MOS2CT52R390J is REACH unaffected; the ROX2SJ39R has vendor undefined REACH status. Both carry EAR99 ECCN classification and 8533.21.0090 HTSUS code.

Q: Which part should be selected for new designs?

A: Both components are Active status with full manufacturer support. Selection depends on supply chain availability, lead time, and specific application requirements for thermal coefficient or pulse withstanding performance. Consult current inventory levels and delivery schedules for procurement decisions.