OX390K Equivalent & Substitute Parts

Part Overview

The OX390K is a 39 Ohms ±10% 1W through-hole resistor with axial leads, manufactured by Ohmite in the OX series. This ceramic composition resistor features moisture resistance and pulse withstanding capabilities, designed for operating temperatures from -40°C to 220°C. The OX390K is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and component procurement.

Substiute Parts

OX390K

OhmiteIn Stock: 916OX390K Datasheet

Current PartRFQ

OX390KE

OhmiteIn Stock: 1981OX390KE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OX390K is determined by strict equivalence across the following critical parameters:

• Resistance value: 39 Ohms
• Tolerance: ±10%
• Power rating: 1W
• Package configuration: Axial through-hole
• Composition: Ceramic
• Operating temperature range: -40°C to 220°C
• Temperature coefficient: -1000/-1600 ppm/°C
• Features: Moisture resistant, pulse withstanding

The OX390KE qualifies as a direct substitute, maintaining identical electrical specifications and physical dimensions while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The OX390KE is the direct equivalent substitute for the OX390K. Both components share identical electrical and mechanical specifications, ensuring functional interchangeability in circuit applications. The OX390KE offers the advantage of active product status, ensuring continued availability and supply chain reliability. Additionally, the OX390KE meets ROHS3 compliance requirements, whereas the OX390K is non-compliant. For new designs or component replenishment, the OX390KE is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the OX390KE be used as a direct replacement for the OX390K?

A: Yes. The OX390KE maintains identical resistance value (39 Ohms), tolerance (±10%), power rating (1W), package configuration (axial), and operating temperature range (-40°C to 220°C). Physical dimensions are equivalent at 0.217" Dia x 0.650" L.

Q: What is the primary reason to substitute the OX390K?

A: The OX390K is classified as obsolete. The OX390KE provides the same electrical and mechanical functionality with active product status and improved compliance certifications.

Q: Are there any compliance differences between these parts?

A: Yes. The OX390KE is ROHS3 compliant, while the OX390K is RoHS non-compliant. The OX390KE also carries a Moisture Sensitivity Level rating of 1 (Unlimited), compared to Not Applicable for the OX390K.

Q: Will the OX390KE fit in existing PCB layouts designed for the OX390K?

A: Yes. Both components have identical axial package dimensions of 0.217" Dia x 0.650" L (5.50mm x 16.50mm), ensuring mechanical compatibility with existing through-hole footprints.

Q: Are the temperature coefficients identical?

A: Yes. Both the OX390K and OX390KE have a temperature coefficient of -1000/-1600 ppm/°C and operate across the same temperature range of -40°C to 220°C.