OA180KE Equivalent & Substitute Parts

Part Overview

The OA180KE is an 18 Ohms ±10% 1W through-hole resistor manufactured by Ohmite as part of the Little Demon® OA series. This carbon composition axial 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

OA180KE

OhmiteIn Stock: 1006OA180KE Datasheet

Current PartRFQ

OX180KE

OhmiteIn Stock: 862OX180KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OA180KE is determined by strict equivalence across the following critical parameters:

• Resistance Value: 18 Ohms (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)
• Pulse Withstanding Capability: Required feature

The OX180KE qualifies as a direct substitute because it maintains identical electrical specifications (18 Ohms, ±10%, 1W) and package configuration (axial, 2 terminations). Both components feature pulse withstanding capability and share unlimited moisture sensitivity classification. The OX180KE is manufactured by Ohmite and carries active product status, making it suitable for replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The OX180KE serves as the direct substitute for the obsolete OA180KE. Both components maintain identical electrical and mechanical specifications across all critical parameters: 18 Ohms resistance, ±10% tolerance, 1W power rating, and axial package configuration.

The OX180KE offers additional advantages in current applications:

• Active Product Status: The OX180KE is actively manufactured and stocked, ensuring long-term availability for replacement and new designs.
• RoHS Compliance: The substitute component meets RoHS requirements, supporting compliance with current environmental and regulatory standards.
• Enhanced Environmental Performance: The ceramic composition with moisture-resistant properties provides improved performance in humid or challenging operating environments compared to the carbon composition original.
• Defined Operating Parameters: The OX180KE includes specified operating temperature range (-40°C ~ 220°C) and temperature coefficient data, enabling precise thermal performance analysis.

Frequently Asked Questions (FAQ)

Q: Can the OX180KE directly replace the OA180KE in existing designs?

A: Yes. The OX180KE maintains identical electrical specifications (18 Ohms, ±10%, 1W) and axial package configuration. Both components feature pulse withstanding capability and unlimited moisture sensitivity classification. Physical dimensions are comparable, with the OX180KE measuring 0.217" diameter × 0.650" length versus the OA180KE at 0.236" diameter × 0.591" length. These minor dimensional differences do not affect through-hole mounting compatibility.

Q: What is the primary difference between the OA180KE and OX180KE?

A: The main difference is composition: the OA180KE uses carbon composition, while the OX180KE uses ceramic composition. The OX180KE additionally features moisture-resistant properties and is RoHS compliant. Both maintain identical resistance, tolerance, and power rating specifications.

Q: Why is the OA180KE obsolete?

A: The OA180KE is listed as obsolete, indicating it is no longer in active production. The OX180KE represents the current active equivalent from Ohmite, offering improved environmental performance and regulatory compliance.

Q: Are there any thermal performance differences?

A: The OX180KE provides specified operating temperature range (-40°C ~ 220°C) and temperature coefficient data (-1000 / -1600 ppm/°C), enabling precise thermal analysis. The OA180KE does not include these specifications in the available documentation.

Q: Is the OX180KE RoHS compliant?

A: Yes. The OX180KE is RoHS compliant, meeting current environmental and regulatory requirements for electronic components.