OX180K Equivalent & Substitute Parts

Part Overview

The OX180K is an 18 Ohms ±10% 1W through-hole axial resistor manufactured by Ohmite, featuring ceramic composition with moisture-resistant and pulse-withstanding characteristics. This part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing production and maintenance applications. The OX180K operates across a temperature range of -40°C to 220°C and is suitable for applications requiring reliable ceramic resistor performance in axial package configurations.

Substiute Parts

OX180K

OhmiteIn Stock: 970OX180K Datasheet

Current PartRFQ

OX180KE

OhmiteIn Stock: 862OX180KE Datasheet

Parametric EquivalentRFQ

OX180KE

OhmiteIn Stock: 862OX180KE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OX180K is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part OX180KE maintains identical specifications for resistance value, tolerance, power rating, ceramic composition, axial package configuration, physical dimensions, operating temperature range, and temperature coefficient. Both parts feature identical moisture-resistant and pulse-withstanding characteristics with two terminations. The primary distinction is product status: OX180K is obsolete while OX180KE is active, and packaging differs (OX180K uses standard packaging while OX180KE is supplied in bulk). Compliance differences exist, with OX180KE offering RoHS compliance and defined moisture sensitivity level (MSL 1 - Unlimited) compared to the non-compliant OX180K.

Parameter Comparison

Engineering Selection Recommendations

The OX180KE serves as the direct parametric equivalent for the obsolete OX180K. Selection of OX180KE is supported by identical electrical specifications (18 Ohms ±10%, 1W power rating), matching mechanical configuration (axial package, 5.50mm x 16.50mm dimensions), and equivalent thermal performance (-40°C to 220°C operating range, -1000/-1600 ppm/°C temperature coefficient). The OX180KE offers the additional advantage of active product status, ensuring continued availability and supply chain reliability. RoHS compliance of OX180KE aligns with modern regulatory requirements, whereas the OX180K is non-compliant. The defined MSL rating (1 - Unlimited) of OX180KE provides explicit moisture handling specifications suitable for controlled storage and assembly environments.

Frequently Asked Questions (FAQ)

Q: Can OX180KE directly replace OX180K in existing designs? A: Yes. OX180KE maintains identical electrical parameters (18 Ohms ±10%, 1W), thermal characteristics (-40°C to 220°C), and physical dimensions (0.217" Dia x 0.650" L). Both parts feature ceramic composition with moisture-resistant and pulse-withstanding properties. Direct substitution is electrically and mechanically compatible.

Q: What is the primary reason for substitution? A: OX180K is classified as obsolete. OX180KE is the active equivalent from the same manufacturer (Ohmite) and series (OX), ensuring continued supply availability and production support.

Q: Are there packaging differences between OX180K and OX180KE? A: OX180K uses standard packaging while OX180KE is supplied in bulk packaging. Both parts maintain identical axial configuration and physical dimensions suitable for through-hole PCB assembly.

Q: Does RoHS compliance affect electrical performance? A: No. RoHS compliance of OX180KE reflects manufacturing process standards and material composition restrictions. Electrical specifications, resistance value, tolerance, power rating, and thermal performance remain identical to OX180K.

Q: What does MSL 1 (Unlimited) mean for OX180KE? A: MSL 1 indicates the lowest moisture sensitivity level, allowing unlimited shelf life under controlled storage conditions without baking requirements prior to assembly. OX180K lists MSL as Not Applicable due to its obsolete status.

Q: Are the temperature coefficients identical? A: Yes. Both OX180K and OX180KE specify -1000 / -1600 ppm/°C temperature coefficient, ensuring equivalent thermal stability across the -40°C to 220°C operating range.