OX181K Equivalent & Substitute Parts

Part Overview

The OX181K is a 180 Ohms ±10% 1W 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 OX181K is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

OX181K

OhmiteIn Stock: 973OX181K Datasheet

Current PartRFQ

OX181KE

OhmiteIn Stock: 5451OX181KE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OX181K is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute component must match the following specifications:

• Resistance value: 180 Ohms
• Tolerance: ±10%
• Power rating: 1W
• Composition: Ceramic
• Package configuration: Axial with 2 terminations
• Physical dimensions: 0.217" Dia x 0.650" L (5.50mm x 16.50mm)
• Operating temperature range: -40°C ~ 220°C
• Temperature coefficient: -1000 / -1600 ppm/°C
• Features: Moisture Resistant, Pulse Withstanding

The OX181KE meets all these criteria and is identified as a direct substitute for the obsolete OX181K.

Parameter Comparison

Engineering Selection Recommendations

The OX181KE is the direct equivalent substitute for the obsolete OX181K. Both components are manufactured by Ohmite within the OX series and maintain identical electrical and mechanical specifications across all critical parameters including resistance, tolerance, power rating, package dimensions, and operating temperature range.

The primary distinction between the two components is product status and regulatory compliance. The OX181K is obsolete and RoHS non-compliant, while the OX181KE is an active product that meets ROHS3 compliance requirements. For new designs and ongoing production requiring RoHS compliance, the OX181KE is the appropriate selection. Both components share identical REACH and ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Can the OX181KE be used as a direct replacement for the OX181K in existing designs?

A: Yes. The OX181KE is electrically and mechanically identical to the OX181K across all specified parameters. The components share the same resistance value, tolerance, power rating, package type, physical dimensions, and operating temperature range. Direct substitution is possible without circuit modification.

Q: What is the primary reason to transition from OX181K to OX181KE?

A: The OX181K is classified as obsolete. The OX181KE is an active product from the same manufacturer and series, ensuring continued availability and supply chain reliability. Additionally, the OX181KE meets ROHS3 compliance, whereas the OX181K does not.

Q: Are the physical dimensions identical between OX181K and OX181KE?

A: Yes. Both components have identical axial package dimensions of 0.217" Dia x 0.650" L (5.50mm x 16.50mm), ensuring compatibility with existing PCB layouts and through-hole mounting configurations.

Q: Do both components operate across the same temperature range?

A: Yes. Both the OX181K and OX181KE operate across the identical temperature range of -40°C to 220°C with the same temperature coefficient of -1000 / -1600 ppm/°C.

Q: What packaging options are available for the OX181KE?

A: The OX181KE is supplied in bulk packaging, whereas the OX181K packaging specification was not detailed. For specific packaging requirements, consult the supplier's current product documentation.