OA151KE Equivalent & Substitute Parts

Part Overview

The OA151KE is a 150 Ohm, 1W axial through-hole resistor manufactured by Ohmite as part of the Little Demon® OA series. This carbon composition resistor features pulse withstanding capability and is designed for through-hole applications. The product is currently obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

OA151KE

OhmiteIn Stock: 827OA151KE Datasheet

Current PartRFQ

OX151KE

OhmiteIn Stock: 1387OX151KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OA151KE is determined by the following critical parameters:

• Electrical Specifications: Resistance value (150 Ohms) and tolerance (±10%) must match exactly
• Power Rating: 1W minimum requirement must be maintained
• Package Configuration: Axial through-hole package with 2 terminations
• Mechanical Compatibility: Physical dimensions must accommodate existing PCB layouts and mounting holes
• Functional Features: Pulse withstanding capability must be retained

The OX151KE qualifies as a direct substitute based on matching all critical electrical and mechanical parameters, despite differences in composition and additional features.

Parameter Comparison

Engineering Selection Recommendations

The OX151KE is the manufacturer-recommended substitute for the obsolete OA151KE. Both components are manufactured by Ohmite and maintain identical electrical specifications (150 Ohms, ±10%, 1W). The OX151KE offers the advantage of active product status, ensuring continued availability and supply chain reliability.

The OX151KE employs ceramic composition instead of carbon composition and includes moisture-resistant properties as an additional feature. Both components retain pulse withstanding capability required for the application. The OX151KE is RoHS3 compliant, supporting modern manufacturing and environmental standards.

Physical dimensions differ slightly between the two parts. The OX151KE measures 0.217" Dia x 0.650" L compared to the OA151KE at 0.236" Dia x 0.591" L. These dimensional variations must be evaluated against specific PCB layout constraints and mounting requirements.

Frequently Asked Questions (FAQ)

Q: Can the OX151KE directly replace the OA151KE in all applications?

A: The OX151KE matches all critical electrical parameters (150 Ohms, ±10%, 1W) and package type (axial, 2 terminations). Physical dimensions differ slightly, requiring verification that the OX151KE fits within existing PCB mounting holes and clearance requirements.

Q: What is the primary difference between the OA151KE and OX151KE?

A: The OA151KE uses carbon composition, while the OX151KE uses ceramic composition. The OX151KE adds moisture-resistant properties and operates across a wider temperature range (-40°C to 220°C). Both maintain pulse withstanding capability.

Q: Why is the OA151KE obsolete?

A: The OA151KE is listed as obsolete by the manufacturer. The OX151KE represents the active product line continuation from Ohmite for this resistance and power rating combination.

Q: Are there any compliance differences between these parts?

A: The OX151KE is RoHS3 compliant, while the OA151KE compliance status is not specified. Both are REACH unaffected. The OX151KE supports modern regulatory requirements for electronic component manufacturing.

Q: What should I verify before implementing the OX151KE as a substitute?

A: Verify that the OX151KE physical dimensions (0.217" Dia x 0.650" L) accommodate your PCB layout, mounting hole spacing, and component clearance requirements. Confirm that the ceramic composition and moisture-resistant properties are compatible with your application environment.