OY181K Equivalent & Substitute Parts

Part Overview

The OY181K is a 180 Ohms ±10% 2W 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 OY181K is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement.

Substiute Parts

OY181K

OhmiteIn Stock: 782OY181K Datasheet

Current PartRFQ

OY181KE

OhmiteIn Stock: 2138OY181KE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OY181K is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must match the following specifications:

• Resistance value: 180 Ohms
• Tolerance: ±10%
• Power rating: 2W
• Composition: Ceramic
• Package configuration: Axial with 2 terminations
• Physical dimensions: 0.276" Dia x 0.748" L (7.00mm x 19.00mm)
• Operating temperature range: -40°C ~ 220°C
• Temperature coefficient: -1000 / -1600 ppm/°C
• Features: Moisture Resistant, Pulse Withstanding

The OY181KE meets all these criteria and is classified as an active product, providing continuity for applications currently using the obsolete OY181K.

Parameter Comparison

Engineering Selection Recommendations

The OY181KE is the direct equivalent substitute for the obsolete OY181K. Both components are manufactured by Ohmite within the OY series and provide identical electrical and mechanical performance. The primary distinction is product status: the OY181K is obsolete while the OY181KE remains in active production.

The OY181KE offers an additional compliance advantage: it is ROHS3 compliant, whereas the OY181K is RoHS non-compliant. For applications subject to RoHS requirements, the OY181KE provides regulatory compliance while maintaining full functional equivalence.

Both parts share identical specifications for resistance, tolerance, power rating, composition, package type, physical dimensions, operating temperature range, temperature coefficient, and moisture-resistant pulse-withstanding features. Direct substitution is appropriate for all applications currently utilizing the OY181K.

Frequently Asked Questions (FAQ)

Q: Can the OY181KE be used as a direct replacement for the OY181K?

A: Yes. The OY181KE is electrically and mechanically identical to the OY181K. Both components feature 180 Ohms ±10% resistance, 2W power rating, ceramic composition, axial package configuration, and identical physical dimensions of 0.276" Dia x 0.748" L (7.00mm x 19.00mm). The OY181KE is the active production equivalent.

Q: What is the primary reason to transition from OY181K to OY181KE?

A: The OY181K is classified as obsolete. The OY181KE is the active production part from Ohmite that maintains full functional equivalence. Additionally, the OY181KE is ROHS3 compliant, providing regulatory compliance for applications subject to RoHS requirements.

Q: Are the physical dimensions identical between OY181K and OY181KE?

A: Yes. Both parts share identical dimensions of 0.276" Dia x 0.748" L (7.00mm x 19.00mm) and use the same axial package configuration. No PCB layout modifications are required for substitution.

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

A: Yes. Both the OY181K and OY181KE 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 OY181KE?

A: The OY181KE is supplied in bulk packaging, whereas the OY181K packaging specification is not defined. Confirm bulk packaging compatibility with your procurement requirements.