OY391K Equivalent & Substitute Parts

Part Overview

The OY391K is a 390 Ohms ±10% 2W through-hole resistor with axial leads, manufactured by Ohmite. This ceramic composition resistor features moisture resistance and pulse withstanding capabilities, designed for applications requiring reliable performance across a wide operating temperature range of -40°C to 220°C. The OY391K is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and component procurement.

Substiute Parts

OY391K

OhmiteIn Stock: 955OY391K Datasheet

Current PartRFQ

OY391KE

OhmiteIn Stock: 1049OY391KE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OY391K is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part OY391KE maintains identical specifications for resistance value, tolerance, power rating, ceramic composition, axial package configuration, physical dimensions, operating temperature range, and temperature coefficient. Both parts are manufactured by Ohmite within the OY series and feature identical moisture resistance and pulse withstanding characteristics. The primary distinction is product status: OY391K is obsolete while OY391KE is active, and packaging format differs (OY391KE is supplied in bulk packaging). These differences do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The OY391KE is the direct substitute for the obsolete OY391K. Both components are electrically and mechanically identical across all specified parameters. Selection of OY391KE is supported by its active product status, ensuring continued availability and supply chain reliability. OY391KE additionally provides ROHS3 compliance, which may be required for applications subject to RoHS regulations. The bulk packaging format of OY391KE does not affect component performance or compatibility in circuit applications. For designs currently using OY391K, transition to OY391KE requires no circuit modifications or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can OY391KE be used as a direct replacement for OY391K in existing designs? A: Yes. OY391KE is electrically and mechanically equivalent to OY391K across all specified parameters including resistance, tolerance, power rating, package type, and operating temperature range. No circuit modifications are required.

Q: What is the difference between OY391K and OY391KE? A: The primary differences are product status (OY391K is obsolete; OY391KE is active) and packaging format (OY391KE is supplied in bulk). Electrical and mechanical specifications are identical.

Q: Does the RoHS compliance difference between OY391K and OY391KE affect compatibility? A: No. RoHS compliance status does not affect electrical or mechanical performance. OY391KE's ROHS3 compliance may be required for applications subject to RoHS regulations, but this is a regulatory consideration rather than a functional one.

Q: Are the physical dimensions identical between OY391K and OY391KE? A: Yes. Both parts have identical axial package dimensions of 0.276" Dia x 0.748" L (7.00mm x 19.00mm), ensuring identical PCB layout compatibility.

Q: Can OY391KE be used in high-temperature applications? A: Yes. OY391KE maintains the same operating temperature range as OY391K: -40°C to 220°C, with identical temperature coefficient specifications of -1000/-1600 ppm/°C.