OA333KE Equivalent & Substitute Parts

Part Overview

The OA333KE is a 33 kOhms ±10% 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

OA333KE

OhmiteIn Stock: 930OA333KE Datasheet

Current PartRFQ

OX333KE

OhmiteIn Stock: 1271OX333KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OA333KE is determined by strict equivalence across the following critical parameters:

• Resistance Value: 33 kOhms (exact match required)
• Tolerance: ±10% (exact match required)
• Power Rating: 1W (exact match required)
• Package Configuration: Axial through-hole (exact match required)
• Number of Terminations: 2 (exact match required)

The OX333KE qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. While the OX333KE uses ceramic composition instead of carbon composition and includes moisture-resistant properties, these differences represent functional improvements that maintain full compatibility with the original OA333KE specification envelope.

Parameter Comparison

Engineering Selection Recommendations

The OX333KE is the manufacturer-recommended substitute for the obsolete OA333KE. Both components are manufactured by Ohmite and maintain identical electrical specifications across resistance, tolerance, and power rating. The OX333KE is currently in active production status, ensuring availability for new designs and replacement applications.

The OX333KE provides enhanced environmental performance through ceramic composition and integrated moisture-resistant properties, while maintaining full compatibility with the original OA333KE footprint and electrical requirements. Both components carry REACH Unaffected status and EAR99 export classification.

The minor dimensional variation (0.217" Dia x 0.650" L versus 0.236" Dia x 0.591" L) falls within acceptable tolerances for standard through-hole PCB layouts and does not impact functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the OX333KE be used as a direct replacement for the OA333KE?

A: Yes. The OX333KE matches all critical electrical parameters: 33 kOhms resistance, ±10% tolerance, and 1W power rating. Both components use identical axial through-hole packaging with two terminations, ensuring mechanical and electrical compatibility.

Q: What is the primary difference between the OA333KE and OX333KE?

A: The OA333KE uses carbon composition construction, while the OX333KE uses ceramic composition with moisture-resistant properties. The OX333KE also includes enhanced pulse withstanding capability. These differences represent functional improvements without affecting the core electrical specification.

Q: Are there dimensional concerns when substituting the OX333KE for the OA333KE?

A: The OX333KE dimensions (0.217" Dia x 0.650" L) differ slightly from the OA333KE (0.236" Dia x 0.591" L). These variations are within standard tolerances for axial through-hole component placement and do not impact PCB layout compatibility for typical applications.

Q: What is the product status difference, and why does it matter?

A: The OA333KE is obsolete and no longer manufactured. The OX333KE is in active production, ensuring reliable supply for replacement and new applications. Using the active substitute eliminates supply chain risk.

Q: Are both components compliant with environmental regulations?

A: Yes. Both the OA333KE and OX333KE carry REACH Unaffected status and EAR99 export classification, indicating compliance with applicable environmental and trade regulations.